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WO2016062066A1 - 数据接收方法、发送方法、接收装置及发送装置 - Google Patents

数据接收方法、发送方法、接收装置及发送装置 Download PDF

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Publication number
WO2016062066A1
WO2016062066A1 PCT/CN2015/078621 CN2015078621W WO2016062066A1 WO 2016062066 A1 WO2016062066 A1 WO 2016062066A1 CN 2015078621 W CN2015078621 W CN 2015078621W WO 2016062066 A1 WO2016062066 A1 WO 2016062066A1
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Prior art keywords
data
antennas
transmitting
antenna
grouping
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English (en)
French (fr)
Inventor
庄东风
李萍
张婷
黄�俊
秦洪峰
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station

Definitions

  • the present invention relates to the field of communications, and in particular to a data receiving method, a transmitting method, a receiving device, and a transmitting device.
  • Spread spectrum technology Direct sequence spread spectrum technology
  • GSM Global Mobile Communications
  • CDMA Code Division Multiple Access
  • LTE Long-Term Evolution
  • GSM Global Mobile Communications
  • CDMA Code Division Multiple Access
  • LTE Long-Term Evolution
  • the use of spread spectrum techniques allows narrowband signals to be transmitted over a wider frequency band, allowing the receiver to demodulate at a lower signal to noise ratio, with useful signal power approaching noise power or even submerging under noise.
  • Spread spectrum communication improves anti-jamming performance, but it occupies more bandwidth resources.
  • more communication systems use different spreading sequences for different terminals to share frequency resources to improve frequency band utilization, that is, code division multiple access.
  • the maximum number of terminals that the code division multiple access method can support does not exceed the number of available spreading sequences, such as the Physical Uplink Control Channel (PUCCH) in the LTE system. Therefore, in the related art, the number of terminals that can simultaneously transmit data in the data transmission system is small.
  • PUCCH Physical Uplink Control Channel
  • the embodiment of the invention provides a data receiving method, a transmitting method, a receiving device and a transmitting device, so as to solve at least the problem that the number of terminals that can simultaneously transmit data in the data transmission system existing in the related art is limited.
  • a data receiving method includes: grouping, according to a predetermined grouping rule, an antenna for transmitting data of a terminal; and notifying the terminal of the grouped result of the grouping; And the data obtained by processing, by the terminal, the sent data according to the grouping result, wherein the grouping result is used by the terminal to perform data on each antenna of the antenna according to a spreading code sequence corresponding to the group to which the antenna belongs.
  • Spread spectrum processing includes: grouping, according to a predetermined grouping rule, an antenna for transmitting data of a terminal; and notifying the terminal of the grouped result of the grouping; And the data obtained by processing, by the terminal, the sent data according to the grouping result, wherein the grouping result is used by the terminal to perform data on each antenna of the antenna according to a spreading code sequence corresponding to the group to which the antenna belongs.
  • the grouping rule includes at least one of: assigning antennas of different terminals to the same group; assigning antennas of different terminals to different groups; transmitting the same information between different antennas
  • the antennas of the terminals are respectively allocated to different groups; the antennas of the terminals transmitting different information between different antennas are respectively allocated to the same group; the antennas of the terminals transmitting different information between different antennas are respectively allocated to different groups.
  • the method further includes: performing equalization processing on the received data.
  • performing equalization processing on the received data includes: when the packet in which the antenna for transmitting the data is located includes two or more antennas, performing multi-user multiple input and multiple output on the data. MU-MIMO equalization processing; and/or, when one antenna is included in the packet in which the antenna transmitting the data is located, single-user multiple input and multiple-output SU-MIMO equalization processing is performed.
  • a data transmission method including: receiving, by a base station, a grouping result of grouping antennas set to transmit data; and data corresponding to each antenna according to a group to which the antenna belongs
  • the spreading code sequence is subjected to spreading processing; the data after the spreading processing is transmitted and processed.
  • a data receiving apparatus comprising: a grouping module configured to group an antenna for transmitting data of a terminal according to a predetermined grouping rule; and a notification module configured to group the group The grouping result is sent to the terminal; the first receiving module is configured to receive data obtained by processing, by the terminal, the data sent according to the grouping result, wherein the grouping result is used by the terminal pair
  • the data on each antenna is spread-spectrum processed according to the spreading code sequence corresponding to the group to which the antenna belongs.
  • the grouping rule includes at least one of: assigning antennas of different terminals to the same group; assigning antennas of different terminals to different groups; transmitting the same information between different antennas
  • the antennas of the terminals are respectively allocated to different groups; the antennas of the terminals transmitting different information between different antennas are respectively allocated to the same group; the antennas of the terminals transmitting different information between different antennas are respectively allocated to different groups.
  • the data receiving apparatus further includes: a first processing module, configured to perform equalization processing on the received data.
  • the first processing module includes: a first processing unit, configured to perform multi-user on the data when two or more antennas are included in a packet in which an antenna that transmits the data is included Multi-input and multi-output MU-MIMO equalization processing; and/or, the second processing unit is configured to perform single-user multi-input and multi-output SU- on the data when the antenna in which the antenna transmitting the data is located includes one antenna MIMO equalization processing.
  • a data transmitting apparatus including: a second receiving module, configured to receive a grouping result sent by a base station to group an antenna for transmitting data; and a second processing module, set In order to perform data spreading processing on the data of each antenna according to the spreading code sequence corresponding to the group to which the antenna belongs, the transmitting module is configured to perform transmission processing on the data after the spreading processing.
  • the antenna for transmitting data of the terminal is grouped according to a predetermined grouping rule; the result of the grouping after the grouping is notified to the terminal; and the method for transmitting the packet according to the grouping result sent by the terminal is received.
  • the problem that the number of terminals that can simultaneously transmit data in the transmission system is limited, thereby achieving the effect of increasing the number of terminals simultaneously transmitting data in the data transmission system.
  • FIG. 1 is a flowchart of a data receiving method according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a data transmitting method according to an embodiment of the present invention.
  • FIG. 3 is a flow chart of transmission data of a MIMO system according to an embodiment of the present invention.
  • FIG. 4 is a block diagram showing the structure of a data receiving apparatus according to an embodiment of the present invention.
  • FIG. 5 is a block diagram showing a preferred structure of a data receiving apparatus according to an embodiment of the present invention.
  • FIG. 6 is a structural block diagram of a first processing module 62 in a data receiving apparatus according to an embodiment of the present invention.
  • FIG. 7 is a structural block diagram of a base station according to an embodiment of the present invention.
  • FIG. 8 is a block diagram showing the structure of a data transmitting apparatus according to an embodiment of the present invention.
  • FIG. 9 is a structural block diagram of a terminal according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of time domain symbol positions of data signals and pilot signals in accordance with an embodiment of the present invention.
  • FIG. 1 is a flowchart of a data receiving method according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step S102 grouping antennas of the terminal for transmitting data according to a predetermined grouping rule
  • Step S104 notifying the terminal of the grouping result after the grouping
  • Step S106 The data obtained by processing the sent data according to the grouping result sent by the terminal, where the result of the grouping is used by the terminal to spread the data on each antenna of the antenna according to the spreading code sequence corresponding to the group to which the antenna belongs. deal with.
  • the antennas for transmitting data of the terminal are grouped according to a predetermined grouping rule; the result of the grouping after the grouping is notified to the terminal; and the data obtained by the receiving terminal after processing the transmitted data according to the result of the grouping, wherein
  • the result of the grouping is used by the terminal to perform spreading processing on the data of each antenna of the terminal according to the spreading code sequence corresponding to the group to which the antenna belongs, that is, the result of the grouping is used by the terminal to use data on the antennas belonging to the same group.
  • the same spreading code sequence is spread-spectrum processing, and the antennas are grouped, and the data transmitted on one group of antennas is spread using the same spreading code sequence, so that the number of the spreading code sequences is kept constant.
  • the number of receiving antennas is increased to increase the spatial freedom of the multi-antenna wireless channel, thereby increasing the number of terminals that can simultaneously perform data transmission.
  • the invention solves the problem that the number of terminals that can simultaneously transmit data in the data transmission system existing in the related art is limited, thereby achieving the effect of increasing the number of terminals simultaneously transmitting data in the data transmission system.
  • one base station can support data transmission of multiple terminals, and each terminal can transmit data using a single antenna or multiple antennas.
  • the base station can group all antennas of all terminals, and all antennas in the same group can use the same time domain and frequency domain resources to transmit data, and all antennas in different groups use the same or different time domain and frequency domain resources to send data.
  • the above grouping rule may include at least one of: allocating antennas of different terminals to the same group; allocating antennas of different terminals to different groups; respectively assigning antennas of terminals transmitting the same information between different antennas to Different groups; antennas of terminals transmitting different information between different antennas are respectively assigned to the same group; antennas of terminals transmitting different information between different antennas are respectively assigned to different groups.
  • the method further includes: performing equalization processing on the received data.
  • the terminal is received at the base station After the transmitted data, the received data is first de-framed, and then the de-framed data of each receiving antenna is despread on each spreading code track, and then equalized on each code channel to obtain each Demodulated data of data on all antennas in each code channel.
  • the performing equalization processing on the received data by the base station may include: performing multi-user multiple input and multiple MU-MIMO equalization processing on the data when the packet in which the antenna for transmitting data is located includes two or more antennas; and/or When the antenna in which the antenna for transmitting data is located includes one antenna, the data is subjected to single-user multiple input and multiple-output SU-MIMO equalization processing. That is, if there are multiple antennas in the packet corresponding to the current code channel, MU-MIMO equalization is performed; if there is only one antenna in the packet corresponding to the current code channel, SU-MIMO equalization is performed. And, if the same information is transmitted between different antennas of the same user terminal, the inter-antenna combining is performed.
  • FIG. 2 is a flowchart of a data sending method according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:
  • Step S202 receiving a grouping result sent by the base station to group the antennas for transmitting data
  • Step S204 performing spreading processing on the data on each antenna according to the spreading code sequence corresponding to the group to which the antenna belongs;
  • Step S206 performing transmission processing on the data after the spread spectrum processing.
  • the result of grouping the antennas for transmitting data sent by the base station is received; the data on each antenna is subjected to spreading processing according to the spreading code sequence corresponding to the group to which the antenna belongs; and the data after the spreading processing is performed.
  • Transmitting processing is implemented to group antennas, and data transmitted on a group of antennas is spread using the same spreading code sequence, so that the number of receiving antennas is increased while keeping the number of spreading code sequences unchanged.
  • the spatial freedom of the multi-antenna wireless channel is increased, thereby increasing the number of terminals that can be simultaneously transmitted.
  • the invention solves the problem that the number of terminals that can simultaneously transmit data in the data transmission system existing in the related art is limited, thereby achieving the effect of increasing the number of terminals simultaneously transmitting data in the data transmission system.
  • MIMO Multiple Input Multiple Output
  • Step S302 the base station groups each antenna of each user terminal, each packet corresponds to a spreading code sequence, and the base station notifies the user terminal of the grouping result;
  • Step S304 each user terminal performs coding and constellation point mapping on the data transmitted on each antenna, and performs spreading according to the grouping result sent by the base station, and transmits data on the corresponding antenna after resource mapping and framing;
  • Step S306 the base station despreads the data received on each of the receiving antennas on each of the spreading code channels, and then performs MU-MIMO or SU-MIMO equalization on each code channel to obtain each of each user terminal.
  • the demodulation result of the data transmitted on the transmitting antenna is the demodulation result of the data transmitted on the transmitting antenna.
  • a data receiving device and a data transmitting device are provided, which are used to implement the above-mentioned embodiments and preferred embodiments, and are not described again.
  • the term “module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 4 is a structural block diagram of a data receiving apparatus according to an embodiment of the present invention. As shown in FIG. 4, the apparatus includes a grouping module 42, a notification module 44, and a first receiving module 46. The device will be described below.
  • the grouping module 42 is configured to group the antennas for transmitting data of the terminal according to a predetermined grouping rule; the notification module 44 is connected to the grouping module 42, and is configured to notify the terminal of the grouping result after the grouping; the first receiving module 46. Connect to the foregoing notification module 44, and set the data obtained by processing the sent data according to the grouping result sent by the terminal, where the result of the grouping is used by the terminal to correspond to the data of each antenna of the antenna according to the group to which the antenna belongs.
  • the spreading code sequence is subjected to spread spectrum processing.
  • the foregoing grouping rule includes at least one of: assigning antennas of different terminals to the same group; assigning antennas of different terminals to different groups; and assigning antennas of terminals transmitting the same information between different antennas to respectively Different groups; antennas of terminals transmitting different information between different antennas are respectively assigned to the same group; antennas of terminals transmitting different information between different antennas are respectively assigned to different groups.
  • FIG. 5 is a block diagram showing a preferred structure of a data receiving apparatus according to an embodiment of the present invention. As shown in FIG. 5, the apparatus includes a first processing module 52 in addition to all the modules shown in FIG. Description.
  • the first processing module 52 is coupled to the first receiving module 46 and configured to perform equalization processing on the received data.
  • FIG. 6 is a structural block diagram of a first processing module 52 in a data receiving apparatus according to an embodiment of the present invention. As shown in FIG. 6, the first processing module 52 includes a first processing unit 62 and/or a second processing unit 64. The first processing module 52 will be described below.
  • the first processing unit 62 is configured to perform multi-user multiple input and multiple MU-MIMO equalization processing on the data when the packet in which the antenna for transmitting data is included includes two or more antennas; and/or the second processing unit 64.
  • a base station performs deframing processing on data of each of its receiving antennas, and the base station despreads data of each of its receiving antennas in each spread spectrum. Perform despreading on the code track, and then perform equalization on each code channel to obtain demodulated data of all antennas in each code channel: if the current spread spectrum code corresponding packet includes multiple antennas, perform MU-MIMO equalization If the current packet of the spreading code channel includes only one antenna, SU-MIMO equalization is performed. If the same information is transmitted between different antennas of the same user terminal, the inter-antenna combining is performed.
  • FIG. 8 is a structural block diagram of a data transmitting apparatus according to an embodiment of the present invention. As shown in FIG. 8, the apparatus includes a second receiving module 82, a second processing module 84, and a transmitting module 86. The device will be described below.
  • the second receiving module 82 is configured to receive a packet result sent by the base station to group the antenna for transmitting data
  • the second processing module 84 is connected to the second receiving module 82, and is configured to follow the data on each antenna.
  • the spreading code sequence corresponding to the group to which the antenna belongs is subjected to spreading processing; the transmitting module 86 is connected to the second processing module 84, and is configured to perform transmission processing on the data after the spreading processing.
  • each user terminal performs spreading processing on transmission data for each antenna according to a packet result notified by a base station: the same group uses the same A spreading code sequence, using different spreading code sequences between different groups. Then, the spread spectrum result is mapped to the specified time domain and frequency domain resource location, and data is sent after the data is framed.
  • a A data transmission system and device to increase the number of terminals that can be simultaneously transmitted in the system.
  • MIMO technology is based on multi-antenna transmission and multi-antenna reception, and has gradually become the core technology in modern communication systems.
  • Theoretical studies have shown that MIMO technology can multiply the channel capacity without increasing the channel bandwidth and antenna transmit power, and the channel capacity increases linearly with the number of antennas.
  • the spatial sub-channel formed between the transmitting end and the receiving end antenna array is sufficiently independent, the spatial channel can be regarded as a plurality of parallel spatial transmission channels, thereby allowing multiple data streams (multi-terminal data streams) to be The same time domain and frequency domain resources are transmitted through different spatial subchannels, that is, space division multiplexing.
  • a terminal device in a wireless communication system is provided, and the operations in the terminal are described below:
  • Orthogonal Frequency Division Multiplexing OFDM
  • the total number of subcarriers is
  • Each resource block (Resource Block, RB for short) includes Continuous subcarriers, the base station allocates different resource index parameters for each antenna of each user terminal
  • the data to be transmitted by the user terminal u is coded and modulated.
  • the spreading sequence that all user terminals can use is The antenna p of the user terminal u uses the index number as Spreading sequence for spreading:
  • l corresponds to the data symbol position index of the OFDM system.
  • the user terminal u cyclically shifts and precodes the spread data:
  • the RB location corresponding to the data z (u,p) (k,l) resource mapping of the user terminal u is:
  • the user terminal transmits a reference signal (or a pilot signal) at the same RB position as the data signal, and the reference signal consists of a base sequence and a cyclic shift:
  • FIG. 10 is a schematic diagram of the time domain symbol positions of the data signals and the pilot signals according to an embodiment of the present invention.
  • a base station apparatus in a wireless communication system is further provided, and the following operations in the base station are continued:
  • the base station side receives the signal of each terminal UE, and extracts the data signal according to the reverse process of resource mapping.
  • the channel estimation of the reference signal comprises the steps of: multiplying the received reference signal by a conjugate of the local mother code sequence to perform the annihilation of the mother code; and performing an FFT operation on the data after the mother code is decoded, the cyclically shifting is performed in the transformed data. Extract the corresponding symbol and the channel estimation value of the receiving antenna; the channel estimation value after the inter-symbol average
  • the data signal processing process includes the steps of: performing pre-coding and de-coupling in accordance with the pre-coding and cyclic shift inverse processes; for each sub-carrier data, performing despreading on each occupied spreading code channel:
  • I is the unit matrix
  • the (column vector) is the demodulation result of the two user terminals u 1 and u 2 , respectively.
  • z (u) (k) is the final demodulation result of the user u.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above embodiments and the preferred embodiments solve the problem that the number of terminals that can simultaneously transmit data in the data transmission system existing in the related art is limited, and thus the terminal that simultaneously transmits data in the data transmission system is improved.
  • the effect of the quantity is limited, and thus the terminal that simultaneously transmits data in the data transmission system is improved.

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Abstract

本发明提供了一种数据接收方法、发送方法、接收装置及发送装置，其中，该数据接收方法包括：按照预定分组规则对终端的用于发送数据的天线进行分组；将进行分组后的分组结果通知给终端；接收终端发送的根据分组结果对发送的数据进行处理后得到的数据，其中，分组结果用于终端对对其每根天线上的数据按照天线所属分组对应的扩频码序列进行扩频处理，通过本发明，解决了相关技术中存在的数据传输系统中可同时传输数据的终端数量受限的问题，进而达到了提升数据传输系统中同时传输数据的终端的数量的效果。

Description

数据接收方法、发送方法、接收装置及发送装置 技术领域
本发明涉及通信领域，具体而言，涉及一种数据接收方法、发送方法、接收装置及发送装置。
背景技术
直接序列扩频技术(以下简称扩频技术)以其抗频选衰落、抗窄带干扰、抗多径衰落以及高隐蔽性等优点，在如今的通信系统中被广泛应用，比如全球移动通信(Global system for Mobile Communication，简称为GSM)、码分多址(Code Division Multiple Access，简称为CDMA)以及长期演进(Long-Term Evolution，简称为LTE)系统等。使用扩频技术使得窄带信号在较宽的频带上进行传输，从而允许接收端以较低信噪比进行解调，有用信号功率接近噪声功率甚至淹没在噪声之下也是可能的。扩频通信提高了抗干扰性能，但占用了较多的频带资源。目前较多的通信系统采用为不同终端分配不同扩频序列的方法，来共用频率资源，以提高频带利用率，即码分多址。码分多址方法可支持的最大终端数不超过可使用的扩频序列个数，比如LTE系统中的物理上行链路控制信道(Physical Uplink Control Channel，简称为PUCCH)。因此，在相关技术中，在数据传输系统中可同时传输数据的终端数量较少。
针对相关技术中存在的能够同时传输数据的终端数量受限的问题，目前尚未提出有效的解决方案。
发明内容
本发明实施例提供了一种数据接收方法、发送方法、接收装置及发送装置，以至少解决相关技术中存在的数据传输系统中可同时传输数据的终端数量受限的问题。
根据本发明实施例的一个方面，提供了一种数据接收方法，包括：按照预定分组规则对终端的用于发送数据的天线进行分组；将进行分组后的分组结果通知给所述终端；接收所述终端发送的根据所述分组结果对发送的数据进行处理后得到的数据，其中，所述分组结果用于所述终端对其每根天线上的数据按照天线所属分组对应的扩频码序列进行扩频处理。
在本发明实施例中，所述分组规则包括以下至少之一：将不同的终端的天线分配至相同的组；将不同的终端的天线分配至不同的组；将在不同天线间传输相同信息的终端的天线分别分配至不同的组；将在不同天线间传输不同信息的终端的天线分别分配至相同的组；将在不同天线间传输不同信息的终端的天线分别分配至不同的组。
在本发明实施例中，在接收所述终端发送的根据所述分组结果对所述发送的数据进行处理后得到的数据之后，还包括：对接收的所述数据进行均衡处理。
在本发明实施例中，对接收的所述数据进行均衡处理包括：当发送所述数据的天线所在的分组中包括两个及两个以上天线时，对所述数据进行多用户多入多出MU-MIMO均衡处理；和/或，当发送所述数据的天线所在的分组中包括一个天线时，进行单用户多入多出SU-MIMO均衡处理。
根据本发明实施例的另一方面，提供了一种数据发送方法，包括：接收基站发送的对设置为发送数据的天线进行分组的分组结果；对每根天线上的数据按照天线所属分组对应的扩频码序列进行扩频处理；对扩频处理后的数据进行发送处理。
根据本发明实施例的再一方面，提供了一种数据接收装置，包括：分组模块，设置为按照预定分组规则对终端的用于发送数据的天线进行分组；通知模块，设置为将进行分组后的分组结果通知给所述终端；第一接收模块，设置为接收所述终端发送的根据所述分组结果对发送的数据进行处理后得到的数据，其中，所述分组结果用于所述终端对其每根天线上的数据按照天线所属分组对应的扩频码序列进行扩频处理。
在本发明实施例中，所述分组规则包括以下至少之一：将不同的终端的天线分配至相同的组；将不同的终端的天线分配至不同的组；将在不同天线间传输相同信息的终端的天线分别分配至不同的组；将在不同天线间传输不同信息的终端的天线分别分配至相同的组；将在不同天线间传输不同信息的终端的天线分别分配至不同的组。
在本发明实施例中，数据接收装置还包括：第一处理模块，设置为对接收的所述数据进行均衡处理。
在本发明实施例中，所述第一处理模块包括：第一处理单元，设置为当发送所述数据的天线所在的分组中包括两个及两个以上天线时，对所述数据进行多用户多入多出MU-MIMO均衡处理；和/或，第二处理单元，设置为当发送所述数据的天线所在的分组中包括一个天线时，对所述数据进行单用户多入多出SU-MIMO均衡处理。
根据本发明实施例的又一方面，提供了一种数据发送装置，包括：第二接收模块，设置为接收基站发送的对用于发送数据的天线进行分组的分组结果；第二处理模块，设置为对每根天线上的数据按照天线所属分组对应的扩频码序列进行扩频处理；发送模块，设置为对扩频处理后的数据进行发送处理。
通过本发明实施例，采用按照预定分组规则对终端的用于发送数据的天线进行分组；将进行分组后的分组结果通知给所述终端；接收所述终端发送的根据所述分组结果对发送的数据进行处理后得到的数据，其中，所述分组结果用于所述终端对其每根天线上的数据按照天线所属分组对应的扩频码序列进行扩频处理，解决了相关技术中存在的数据传输系统中可同时传输数据的终端数量受限的问题，进而达到了提升数据传输系统中同时传输数据的终端的数量的效果。
附图说明
此处所说明的附图用来提供对本发明实施例的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明实施例的数据接收方法的流程图；
图2是根据本发明实施例的数据发送方法的流程图；
图3是根据本发明实施例的MIMO系统的传输数据流程图；
图4是根据本发明实施例的数据接收装置的结构框图；
图5是根据本发明实施例的数据接收装置的优选结构框图；
图6是根据本发明实施例的数据接收装置中第一处理模块62的结构框图；
图7是根据本发明实施例的基站的结构框图；
图8是根据本发明实施例的数据发送装置的结构框图；
图9是根据本发明实施例的终端的结构框图；
图10是根据本发明实施例的数据信号与导频信号的时域符号位置示意图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明实施例。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
在本实施例中提供了一种数据接收方法，图1是根据本发明实施例的数据接收方法的流程图，如图1所示，该流程包括如下步骤：
步骤S102，按照预定分组规则对终端的用于发送数据的天线进行分组；
步骤S104，将进行分组后的分组结果通知给终端；
步骤S106，接收终端发送的根据分组结果对发送的数据进行处理后得到的数据，其中，该分组结果用于终端对其每根天线上的数据按照天线所属分组对应的扩频码序列进行扩频处理。
通过上述步骤，按照预定分组规则对终端的用于发送数据的天线进行分组；将进行分组后的分组结果通知给终端；接收终端发送的根据分组结果对发送的数据进行处理后得到的数据，其中，分组结果用于终端对其每根天线上的数据按照天线所属分组对应的扩频码序列进行扩频处理，也就是说，该分组结果用于终端对属于同一组内的天线上的数据采用相同的扩频码序列进行扩频处理，实现了对天线进行分组，并且，一组天线上传输的数据使用同一个扩频码序列进行扩频，使得在保持扩频码序列数量不变的条件下，增加接收天线数以提升多天线无线信道的空间自由度，进而增加了可同时进行数据传输的终端的数量。解决了相关技术中存在的数据传输系统中可同时传输数据的终端数量受限的问题，进而达到了提升数据传输系统中同时传输数据的终端的数量的效果。
其中，一个基站中可以支持多个终端的数据传输，每个终端可以使用单天线或多天线发送数据。基站可以对所有终端的所有天线进行分组，相同组内的所有天线可以使用相同的时域、频域资源发送数据，不同组间的所有天线使用相同的或不同的时域、频域资源发送数据。上述的分组规则可以包括以下至少之一：将不同的终端的天线分配至相同的组；将不同的终端的天线分配至不同的组；将在不同天线间传输相同信息的终端的天线分别分配至不同的组；将在不同天线间传输不同信息的终端的天线分别分配至相同的组；将在不同天线间传输不同信息的终端的天线分别分配至不同的组。
在一个优选地实施例中，在接收终端发送的根据分组结果对发送的数据进行处理后得到的数据之后，还包括：对接收的数据进行均衡处理。其中，在基站接收到终端 发送的数据后，会首先对接收的数据进行解帧处理，然后对每根接收天线的解帧数据在每个扩频码码道上进行解扩频，然后在每个码道上进行均衡以得到每个码道内所有天线上的数据的解调数据。
其中，基站对接收的数据进行均衡处理可以包括：当发送数据的天线所在的分组中包括两个及两个以上天线时，对数据进行多用户多入多出MU-MIMO均衡处理；和/或，当发送数据的天线所在的分组中包括一个天线时，对数据进行单用户多入多出SU-MIMO均衡处理。即，若当前码道对应的分组有多个天线，则进行MU-MIMO均衡；若当前码道对应的分组只有一个天线，则进行SU-MIMO均衡。并且，如果同一个用户终端的不同天线间传输相同信息，则进行天线间合并。
图2是根据本发明实施例的数据发送方法的流程图，如图2所示，该流程包括如下步骤：
步骤S202，接收基站发送的对用于发送数据的天线进行分组的分组结果；
步骤S204，对每根天线上的数据按照天线所属分组对应的扩频码序列进行扩频处理；
步骤S206，对扩频处理后的数据进行发送处理。
通过上述步骤，接收基站发送的对用于发送数据的天线进行分组的分组结果；对每根天线上的数据按照天线所属分组对应的扩频码序列进行扩频处理；对扩频处理后的数据进行发送处理，实现了对天线进行分组，并且，一组天线上传输的数据使用同一个扩频码序列进行扩频，使得在保持扩频码序列数量不变的条件下，增加接收天线数以提升多天线无线信道的空间自由度，进而增加了可同时传输的终端的数量。解决了相关技术中存在的数据传输系统中可同时传输数据的终端数量受限的问题，进而达到了提升数据传输系统中同时传输数据的终端的数量的效果。
图3是根据本发明实施例的多输入多输出(Multi Input Multi Output，简称为MIMO)系统的传输数据流程图，如图3所示，该流程包括如下步骤：
步骤S302，基站对每个用户终端的每根天线进行分组，每个分组对应一个扩频码序列，基站将分组结果通知给用户终端；
步骤S304，每个用户终端对其每根天线上传输的数据进行编码、星座点映射，并按基站下发的分组结果进行扩频，在经过资源映射与成帧之后在对应天线上发送数据；
步骤S306，基站对其每根接收天线上接收的数据在每个扩频码道上做解扩频处理，然后在每个码道上做MU-MIMO或SU-MIMO均衡得到每个用户终端的每根发送天线上发送的数据的解调结果。
在本实施例中还提供了一种数据接收装置、数据发送装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图4是根据本发明实施例的数据接收装置的结构框图，如图4所示，该装置包括分组模块42、通知模块44和第一接收模块46。下面对该装置进行说明。
分组模块42，设置为按照预定分组规则对终端的用于发送数据的天线进行分组；通知模块44，连接至上述分组模块42，设置为将进行分组后的分组结果通知给终端；第一接收模块46，连接至上述通知模块44，设置为接收终端发送的根据分组结果对发送的数据进行处理后得到的数据，其中，该分组结果用于终端对其每根天线上的数据按照天线所属分组对应的扩频码序列进行扩频处理。
其中，上述分组规则包括以下至少之一：将不同的终端的天线分配至相同的组；将不同的终端的天线分配至不同的组；将在不同天线间传输相同信息的终端的天线分别分配至不同的组；将在不同天线间传输不同信息的终端的天线分别分配至相同的组；将在不同天线间传输不同信息的终端的天线分别分配至不同的组。
图5是根据本发明实施例的数据接收装置的优选结构框图，如图5所示，该装置除包括图4所示的所有模块外，还包括第一处理模块52，下面对该模块进行说明。
第一处理模块52，连接至上述第一接收模块46，设置为对接收的数据进行均衡处理。
图6是根据本发明实施例的数据接收装置中第一处理模块52的结构框图，如图6所示，该第一处理模块52包括第一处理单元62和/或第二处理单元64。下面对该第一处理模块52进行说明。
第一处理单元62，设置为当发送数据的天线所在的分组中包括两个及两个以上天线时，对数据进行多用户多入多出MU-MIMO均衡处理；和/或，第二处理单元64，设置为当发送数据的天线所在的分组中包括一个天线时，对数据进行单用户多入多出SU-MIMO均衡处理。
图7是根据本发明实施例的基站的结构框图，如图7所示，基站为其每根接收天线的数据进行解帧处理，基站对其每根接收天线的解帧数据在每个扩频码码道上进行解扩频，然后在每个码道上进行均衡以得到每个码道内所有天线的解调数据：若当前扩频码道对应的分组中包括多个天线，则进行MU-MIMO均衡；若当前扩频码道对应的分组中只包括一个天线，则进行SU-MIMO均衡。如果同一个用户终端的不同天线间传输相同信息，则进行天线间合并。
图8是根据本发明实施例的数据发送装置的结构框图，如图8所示，该装置包括第二接收模块82、第二处理模块84和发送模块86。下面对该装置进行说明。
第二接收模块82，设置为接收基站发送的对用于发送数据的天线进行分组的分组结果；第二处理模块84，连接至上述第二接收模块82，设置为对每根天线上的数据按照天线所属分组对应的扩频码序列进行扩频处理；发送模块86，连接至上述第二处理模块84，设置为对扩频处理后的数据进行发送处理。
图9是根据本发明实施例的终端的结构框图，如图9所示，每个用户终端为其每根天线按基站所通知的分组结果对发送数据做扩频处理：同一个组内使用相同扩频码序列，不同组间使用不同扩频码序列。然后，将扩频结果映射到指定的时域、频域资源位置，并将数据组帧之后进行数据发送。
针对相关技术中存在的数据传输系统中可同时传输数据的终端数量受限的问题，在本发明实施例中以直接扩频码分多址技术和MIMO空分复用技术为基础，提供了一种数据传输系统与装置，以提升系统中可同时传输的终端数量。
MIMO技术基于多天线发送与多天线接收，逐渐成为现代通信系统中的核心技术。理论研究表明，MIMO技术可以在不增加信道带宽和天线发射功率的情况下成倍地提高信道容量，信道容量随着天线数量线性增加。特别地，当发射端与接收端的天线阵列之间构成的空域子信道足够独立，则空间信道就可以看成是多个并行的空间传输通道，从而允许多个数据流(多终端数据流)在相同的时域、频域资源上通过不同的空间子信道进行传输，即空分复用。
在本发明实施例中提供一种无线通信系统中的终端装置，下面对该终端中的操作进行说明：
在正交频分复用(Orthogonal Frequency Division Multiplexing，简称为OFDM)系统中，总的子载波数为
Figure PCTCN2015078621-appb-000001
每个资源块(Resource Block，简称为RB) 包括
Figure PCTCN2015078621-appb-000002
个连续子载波，基站为每个用户终端的每个天线分配不同的资源索引参数
Figure PCTCN2015078621-appb-000003
用户终端u所要传输的数据经过编码调制后为
Figure PCTCN2015078621-appb-000004
所有用户终端可使用的扩频序列为
Figure PCTCN2015078621-appb-000005
用户终端u的天线p使用索引号为
Figure PCTCN2015078621-appb-000006
的扩频序列进行扩频：
Figure PCTCN2015078621-appb-000007
这里的l对应于OFDM系统的数据符号位置索引。
用户终端u对扩频后的数据进行循环移位和预编码：
Figure PCTCN2015078621-appb-000008
Figure PCTCN2015078621-appb-000009
用户终端u的数据z(u,p)(k,l)资源映射所对应的RB位置为：
Figure PCTCN2015078621-appb-000010
其中，
Figure PCTCN2015078621-appb-000011
用户终端在与数据信号相同RB位置发送参考信号(或称导频信号)，参考信号由基序列和循环移位组成：
Figure PCTCN2015078621-appb-000012
这里，
Figure PCTCN2015078621-appb-000013
为导频母码，不同用户终端的不同天线使用不同的循环移位
Figure PCTCN2015078621-appb-000014
终端所传输的数据信号与导频信号的时域符号位置如图10所示，该图10是根据本发明实施例的数据信号与导频信号的时域符号位置示意图。
在本发明实施例中还提供了一种无线通信系统中的基站装置，下面对该基站中的操作继续说明：
基站侧接收每个终端UE的信号，并按资源映射逆过程取出数据信号
Figure PCTCN2015078621-appb-000015
和参考信号
Figure PCTCN2015078621-appb-000016
其中，ldata＝0,1,…,NSF为数据信号的符号位置索引，lref＝0,1,…,Nref为参考信号的符号位置索引。
参考信号的信道估计包括以下步骤：将接收参考信号与本地母码序列共轭相乘进行解母码；对解母码后的数据进行FFT运算，则可按循环移位在变换后的数据中取出相应符号和接收天线的信道估计值；符号间平均后的信道估计值为
Figure PCTCN2015078621-appb-000017
数据信号处理过程包括以下步骤：按预编码和循环移位逆过程进行解预编码和解循环移位；对于每个子载波数据，在每个占用的扩频码道上进行解扩频：
Figure PCTCN2015078621-appb-000018
将每个用户终端的每个天线作为一个单天线用户终端进行均衡，则对于具有相同扩频序列的两个用户终端u1和u2
Figure PCTCN2015078621-appb-000019
进行两UE的MU-MIMO均衡：
Figure PCTCN2015078621-appb-000020
其中，
Figure PCTCN2015078621-appb-000021
Figure PCTCN2015078621-appb-000022
Figure PCTCN2015078621-appb-000023
这里，I为单位矩阵，
Figure PCTCN2015078621-appb-000024
和
Figure PCTCN2015078621-appb-000025
(列向量)分别为两个用户终端u1和u2的解调结果。
然后，对每个用户终端的多天线均衡结果进行合并：
Figure PCTCN2015078621-appb-000026
这里，z(u)(k)为用户u的最终解调结果。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
如上所述，通过上述实施例及优选实施方式，解决了相关技术中存在的数据传输系统中可同时传输数据的终端数量受限的问题，进而达到了提升数据传输系统中同时传输数据的终端的数量的效果。

Claims (10)

  1. 一种数据接收方法，包括：
    按照预定分组规则对终端的用于发送数据的天线进行分组；
    将进行分组后的分组结果通知给所述终端；
    接收所述终端发送的根据所述分组结果对发送的数据进行处理后得到的数据，其中，所述分组结果用于所述终端对其每根天线上的数据按照天线所属分组对应的扩频码序列进行扩频处理。
  2. 根据权利要求1所述的方法，其中，所述分组规则包括以下至少之一：
    将不同的终端的天线分配至相同的组；
    将不同的终端的天线分配至不同的组；
    将在不同天线间传输相同信息的终端的天线分别分配至不同的组；
    将在不同天线间传输不同信息的终端的天线分别分配至相同的组；
    将在不同天线间传输不同信息的终端的天线分别分配至不同的组。
  3. 根据权利要求1所述的方法，其中，在接收所述终端发送的根据所述分组结果对所述发送的数据进行处理后得到的数据之后，还包括：
    对接收的所述数据进行均衡处理。
  4. 根据权利要求3所述的方法，其中，对接收的所述数据进行均衡处理包括：
    当发送所述数据的天线所在的分组中包括两个及两个以上天线时，对所述数据进行多用户多入多出MU-MIMO均衡处理；和/或，
    当发送所述数据的天线所在的分组中包括一个天线时，进行单用户多入多出SU-MIMO均衡处理。
  5. 一种数据发送方法，包括：
    接收基站发送的对用于发送数据的天线进行分组的分组结果；
    对每根天线上的数据按照天线所属分组对应的扩频码序列进行扩频处理；
    对扩频处理后的数据进行发送处理。
  6. 一种数据接收装置，包括：
    分组模块，设置为按照预定分组规则对终端的用于发送数据的天线进行分组；
    通知模块，设置为将进行分组后的分组结果通知给所述终端；
    第一接收模块，设置为接收所述终端发送的根据所述分组结果对发送的数据进行处理后得到的数据，其中，所述分组结果用于所述终端对其每根天线上的数据按照天线所属分组对应的扩频码序列进行扩频处理。
  7. 根据权利要求6所述的装置，其中，所述分组规则包括以下至少之一：
    将不同的终端的天线分配至相同的组；
    将不同的终端的天线分配至不同的组；
    将在不同天线间传输相同信息的终端的天线分别分配至不同的组；
    将在不同天线间传输不同信息的终端的天线分别分配至相同的组；
    将在不同天线间传输不同信息的终端的天线分别分配至不同的组。
  8. 根据权利要求6所述的装置，其中，还包括：
    第一处理模块，设置为对接收的所述数据进行均衡处理。
  9. 根据权利要求8所述的装置，其中，所述第一处理模块包括：
    第一处理单元，设置为当发送所述数据的天线所在的分组中包括两个及两个以上天线时，对所述数据进行多用户多入多出MU-MIMO均衡处理；和/或，
    第二处理单元，设置为当发送所述数据的天线所在的分组中包括一个天线时，对所述数据进行单用户多入多出SU-MIMO均衡处理。
  10. 一种数据发送装置，包括：
    第二接收模块，设置为接收基站发送的对用于发送数据的天线进行分组的分组结果；
    第二处理模块，设置为对每根天线上的数据按照天线所属分组对应的扩频码序列进行扩频处理；
    发送模块，设置为对扩频处理后的数据进行发送处理。
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