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TW200816658A - Multi-mode radio with interference cancellation circuit - Google Patents

Multi-mode radio with interference cancellation circuit Download PDF

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Publication number
TW200816658A
TW200816658A TW096119044A TW96119044A TW200816658A TW 200816658 A TW200816658 A TW 200816658A TW 096119044 A TW096119044 A TW 096119044A TW 96119044 A TW96119044 A TW 96119044A TW 200816658 A TW200816658 A TW 200816658A
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Taiwan
Prior art keywords
signal
antenna
receiver
communication mode
wtru
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TW096119044A
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English (en)
Inventor
Timothy A Axness
Leonid Kazakevich
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Interdigital Tech Corp
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Publication of TW200816658A publication Critical patent/TW200816658A/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/44—Transmit/receive switching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
    • H04B1/0057—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication
    • H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Noise Elimination (AREA)
  • Time-Division Multiplex Systems (AREA)

Description

200816658 九、發明說明： 【發明所屬之技術領域】 本發明係關於通机系統。尤其是，本發明係關於無線系統中衰減干擾 接收器所接收之通訊之亂真傳輸。 【先前技術】 在包含複數無線傳輸/接收單元(WTRU)(亦即使用者設備(UEs)，無線 裝置’行動平台，手機)以及一網路之胞元通訊系統中，WTRU需要測量來 ( 自不同胞元(cell)的號以便哥找具有最強訊號的基地站並將其回報給網路 以利於交接以及胞元再選擇(閒置模式)之用。當具有比目前服務中之基地站 強之訊號的新基地站被測量時，此網路將指示此個別的WTRXJ交接至新的 基地站。這些測量通常在共同頻道上執行，例如分碼多重存取(CDMA)網路 中之領航頻道(pilot channel)以及行動通訊全球系統(GSM)網路之廣播控制 頻道(BCCH) 〇 多模式WTRUs支援超過一種無線存取技術（Radi〇 Access Technology，RAT)。例如，多模式WTRU可能包括通用陸地無線系統—分 I， 頻雙工(UTRA-FDD)CDMA及GSM之支援。通常，多模式是需要的以便支援 不同RATs之間的交接。此種交接被稱為inter-RAT交接。 此種多模式WTRUs的情況生一個問題，即其中一種模式需要固定傳 輸。例如，在主動UTRA-FDD CDMA胞元中，亦即當在「連接模式」中， WTRUs在不同的頻帶連續傳輸及接收。為執行inter-RAT交接之測量例如至 一GSM或分時同步分碼多重存取(TD-SCDMA)網路，WTRU必須在測量期 間停止傳輸。否則，來自CDMA傳輸器之發射將干擾屬於其它RAT的接收器。 第1圖表示以上所描述的問題。頻譜100包括1920-1980 MHz頻帶105 中之UTRA-FDD訊號，具有來自1805-1880 MHz之落入GSM數位胞元系統 (DCS)1800頻帶115之亂真發射。UTRA-FDD訊號105如果未被衰減的話，本 5 200816658 身如同GSM接收器之大的頻外阻擋者並降低接收器的敏感度。已知的可實 施濾波器解決方法提供UTRA-FDD訊號的一些衰減，但小的頻率間隔以及 成本/尺寸的限制造成未影響來自UTRA_FDD傳輸器之亂真傳輸準位的不適 當的濾、波。 使用多模式運作之之需要連續傳輸之網路藉由允許WTRUm其傳輸 中產生間隙而避免此問題。在間隙期間，WTRU停止傳輸至服務中的胞元。 相反地，WTRU接收來自一不同系統之鄰近胞元之訊號。例如，藉由在 UTRA-FDD中實施一壓縮模式，此WTRU能夠從傳輸間隙中獲益以執行 GSM胞元上的測量。 第2圖表示實施壓縮模式運作之習知WTRU2〇〇。kWTRU2〇〇包括一 天線205，一系統開關210，一雙工器215，一通用行動電訊系統(UMTs)接 收器(RX)220，一UMTS傳輸器(RX)225，一傳輸/接收開關230，一帶通波器 235，一GSMRx 240以及一GSMTx245。系統開關210係用以有選擇性地 連接天線205至一UMTS(例如UTRA-FDD)無線裝置或一GSM無線裝置。藉 由貫施壓縮模式，胞元容量降低，因為在〜711112〇〇與網路之間發生的通訊 在以上所述的傳輸間隙期間被中斷。希望有一種可以同時接收來自一 UTRA-FDD胞元以及-分時多工(丁DMA)胞元之多模式無線褒f以避免此 種通訊中的中斷。 【發明内容】 種多模式WTRU包括至少一天線，一第一通訊模式接收器，一第二 模式通訊接收II以及-第-軌模式傳輸器。該天線個以接收並傳輸至 >一不同型悲之訊號。第一通訊模式接收器係用以接收來自天線之第一型 恶Λ號。第二通訊模式接收器係用以接收來自該天線之第二模式型態訊 號。第一通訊模式傳輸器用以產生並傳送該第一型態訊號至該天線。該第 及第一通模式接收裔同時接收來自天線之訊號。該第一傳輸器傳送第 6 200816658 一型態訊號至天線，而同時第二接收器接收來自天線之第二型態訊號。 此WTRU可以更包括一向量乘法器用以降低或刪除由第二通訊模式 接收器所接收之訊號的干擾，此干擾係由第一模式傳輸器所造成。向量乘 法益调整此干擾之相位及振幅。 此WTRU可更包括一第二通訊模式傳輸器用以產生並傳送第二模式 訊號至天線，以及與該天線通訊之開關。此開關可用以選擇性地連接第二 通訊模式傳輸器至該天線，防止來自天線的訊號到達該第一及第二通訊模 式接收器，並防止該第一通訊模式傳輸器傳該第一型態訊號至該天線。 (、 此WTRU可更包括一第二通訊模式傳輸器用以產生並傳送第二模式 訊號至天線，以及與該天線通訊之開關。此開關可用以選擇性地連接第二 通訊模式傳輸器至該天線，防止來自天線的訊號到達該第一及第二通訊模 式接收器，並防止該第一通訊模式傳輸器傳該第一型態訊號至該天線。 【實施方式】 以下是用於和無線多胞元FDD通訊系統之UTRA-FDD胞元通訊之 WTRU或積體電路之較佳實施例之描述，當從一丁DMA胞元，如GSM或 UTRA-TDD胞元接收訊號時◦當使WTRU未處於連接模式時，此WTRU必 I; 須週期性地搜尋新的基地站。通常使WTRU必須儘可能地有效率地執行搜 尋以便使功率消耗為最小，因此使電池壽命為最大。這可以有效率地執行， 如果WTRU可以同時接收來自FDD胞元及TDMA胞元之訊號。 較佳者，此處所揭露之本發明被合併至一無線傳輸/接收單元内 (WTRU)。以下，WTRU包括但不限於使用者設備，行動站，固定或行動用 戶單元，呼叫器以及其它能夠在無線系統中操作之型態的裝置。本發明之 特欲可以被合併至一 1C内或可被設置於包括許多互相連接的元件的電路 中。 本發明係應用於使用TDD，TDMA，FDD，CDMA，CDMA 2000，分 7 200816658 時同步CDMA(TDCDMA)，以及正交分頻多工(OFDM)。然而，本發明也預 想為可應用至其它型態的通訊系統。 第3圖係合併至WTRU 300之干擾消除系統之較佳實施例之方塊圖。此 WTRU包括一天線305，一傳輸/接收開關310，一三工器(tripiexer)，第—搞 合器320 ’第二耦合器325 ’ UMTS Rx 330，同相/九十度相差(j/q)向量乘法 器355，干擾消除控制電路360以及數據機365。當WTRU 300在接收模式中 日守’在天線抵達之訊5虎被傳送至傳輸/接收開關310。此傳輸/接收開關連 接天線至三工器350以進行UMTS及GSM Rx運作。當WTRU 3〇〇位於gsm 丁X模式中時，此傳輸/接收開關310在GSM傳輸期間連接天係至GSM 丁χ 345。 二工|§315傳遞三不同訊號，一UMTS Rx訊號370, 一UMTS Τχ訊號375 以及一GSM Rx訊號380。此UMTS Τχ訊號375包括由UMTS Τχ 335產生之包 括亂真發射之UMTS傳輸。雖然UMTS Τχ訊號375本身可以由三工器315以 及GSM接收器340前方之可能的濾波器和GSM接收器34〇隔離，亂真發射之 一部份將落入GSM接收頻帶且將在GSMRx訊號路徑380上造成由UMTSTx 通道間雜訊組成之漏電385。此漏電385必須被移除或GSM Rx 340將失去敏 感度。 包含帶通濾波器350，I/Q向量乘法器355，干擾消除控制電路360之干 擾消除結構提供漏電385所需的衰減。UMTS傳輸器335之輸出由第一耦合器 32〇取樣並經過帶通濾波器35〇至yQ向量乘法器355。此1/(^向量乘法器355 回應干擾消除控制電路360提供之Vi(同相位電壓)及Vq(九十度相差電調 整被取樣之UMTS傳輸訊號之相位及振幅以使GSM Rx 34〇所見之雜訊為最 小。從I/Q向量乘法器355所輸出的訊390經由第二耦合器3%與GSMRxIfl號 組合。 被取樣之UMTS訊號之相位及振幅依據以下的程式使用][/q向量乘洼「 荔3 5 5上之Vi線及Vq線3 94而被調整： 振幅=101〇g((Vi Λ 2 + Vq Λ 2))程式 1 8 200816658 以及 相位=arc tan (Vq / Vi) 程式2 干擾消除控制電路360經由數據機365接收來自GSM接收器340之雜訊 的測量，並調整Vi訊號观及Vq訊號394直到:[/Q向量乘法器355之相位及振 幅使雜訊為最小為止。此UMTS漏電可以被衰減3〇dB，允許gsm ^訊 號在UMTS頻帶上傳輸時之加強的接收。 σ
雖然本發明特別參照實施例而被描述， 脫離以上所述之本發明之範圍的情况下可有 热悉本技藝之人士將了解在不 形式及細節中不同的改變。 200816658 【圖式簡單說明】 第一圖提供一種多模式WTRU中之干擾之例； ， 第二圖表示執行測量用之習知需要壓縮模式之多模式WTRU之例；以 及 第三圖提供本發明合併一干擾消除電路之WTRU之系統方塊圖。 【元件符號說明】 100 :頻譜 105 :頻帶 115 :頻帶 205 :天線 21 〇 ·糸統開關 215 :雙工器 220 =接收器 225 :傳輸器 235 I帶通波器 230、310 :傳輸/接收開關 305 :天線 315 :三工器 320、325 :耦合器 340 :接收器 350 :帶通濾波器 355 :向量乘法器 365 :數據機 392、394 :訊號 360 :干擾消除控制電路 370、375、380 ··訊號 Ο
I 10

Claims (1)

  1. 200816658 十、申請專利範圍： ’夕柄式無線傳輪/接收方法(WTRU)，其包含： ⑷一天線； (b)—三工器； ⑷收開關，其钱合至該天線及該三工器； ⑹f _合器’其電福合至該三工器； ⑷_合器，其電齡至該三工器； C， (f) w通濾波器，其電搞合至該第 ⑻一向量乘法器，其·合至該帶通及 向量乘法器係設置用以降低或消除由該第 其中該向景垂、、土。 锅a為所傳遞之訊號的干擾， 純里文去③調整該干擾之相位及振鴨。 2·如申6月專利範圍第1項之WTRU，更包含： 接收式接收器’其電鮮轉三工器，域第—通訊模式 -第糊/接彳删以_三工㈣絲自該天線的 模二===:===， 而接收來自該天線的一第二型態訊號；以及I工㈣及•二輕合器 r·^^—通訊模式傳輸器，其電麵合至該第，合哭，且兮第n 核式傳輪器係設置用以經由該第一搞合器、^ ^^弟―通訊 而產生並傳送該第—型態訊號至該天線，其二二及捕切接收開關 自該天線之訊號，且該第―傳輪器傳:該 3、t申=㈤：接㈣接收來自該天_㈣：修《。 •=專利_第2項之WTRU’其中該向量乘法器係設置㈣ 專=收開關、該三工器以及該第二輕合器 第 =接收器所接收之訊號的干擾，該干— 4·如申請專利範圍第2項之WTRU，更包含： 11 200816658 (k)一第二通訊模式傳輸器，其電耦合至該傳輸/接收開關，且該第二通訊模 式傳輸器係設置用以產生並傳送該第二型態訊號至該天線，其傳輸^ 接收開關係設置用以選擇性地連接該第二通訊模式傳輸器至該天°線、= 止來自該天線之訊號到達該第一及第二通訊模式翻文器、以及防止該第 一通訊模式傳輸器傳送該第一型態訊號至該天線。 ^ 5. 如申請專利範圍第2項之WTRU，其中該第一通訊模式接收器係—通用 行動電訊系統(UMTS)接收器。 6. 如申請專利範圍第2項之WTRU，其中該第二通訊模式接收器係—行動 通訊全球系統(GSM)接收器。
    7. 如申請專娜Μ 2項之WTRU，其中該第—鶴 (FDD)訊號。 刀夕貝又工 8·如申鞠細第7項之WTRU，射域第—職购则所接收 之。玄弟-型,¾訊號係由-通用陸地無線存取(UTRA)_ fdd胞元所產生。 9_，申請細刪2項之WTRU，其㈣第二龍訊號係— 取(TDMA)訊號。 夕里仔 1〇·=ΓΙ:麵:Γ™，其中由該第， n=tr 通用陸地無線存取听叫™就所產生。 如申請專利範圍第9項之wTRU，苴占丄— Ru其中由该弟二通訊模式接收器所接收 行動通訊全球系統(gsm)胞元所產生。 至^二、’泉:。之積體電路⑻），該天線係設置用以接收及傳輸 至少二不同型態訊號，該1C包含： ⑻ -工器； ，）-傳輸/接收’其電_合至該天線及該三工器； (C) 一第一耦合器，其電耦合至該三工器； (d) —第一耦合為，其電耦合至該三工器· ⑷一帶通濾波器，其電P， m i 稠口至^亥弟一耦合器；以及 且該 (f) 一向量乘法器，其電, A旦千、、+σσ 〃 兒耦口至该帶通濾波器以及該第二耦合器，一叫 向里乘法為'係言史置用以降低吱迪 臥及4除由該第二耦合器所傳遞之訊號的干擾， 12 200816658 其中該向量乘法器調整該干擾之相位及振幅。 13.如申请專利範圍弟12項之ic，更包含： (g) —第一通讯模式接收器，其電|禺合至該三工器，且該第 接收器係設置用以經由該傳輸/接收開關以及該三工器而接收=訊模式 一第一型態訊號； ％天線的 通訊 (h) —第二通訊模式接收器，其電耦合至該第二耦合器，且該μ 一 模式接收器係設置用以經由該傳輸/接收開關、該三工器以及爷第弟〜通 而接收來自該天線的一第二型態訊號；以及 人〜輛合器
    ⑴-第-通訊模式傳輸器，其電耗合至該第，合器，且 模式傳輸Ute置用以經賴第1合器、H以及該傳切^通訊 而產生並傳送該第一型態訊號至該天線，其中該第一及第二通士，收開關 器同時接收來自該天線之訊號，且該第—傳輸器傳送該第；收 天線，而同時，該第二接收器接收來自該天線_第二型㈣號”虎至該 κ如申請專利範圍第η項之IC ’其中該向量乘法器係設置㈣ 輸/接收開關、該三X器以及該第二麵合器而降低或消除由:由該傳 式接收器所接收之訊號的干擾，該干擾#i m "—通訊模 成。 '由⑼—通«式傳輪器所造 15·如申請專利範圍第丨3項之1C，更包含： G) -第二通訊模式傳輸器’其電耗合至該傳輸/接收開關，且 式傳輸器係設置用以產生並傳送該第二型態訊號至該 止來自該天紅訊賴達鮮傳齡至該天線、防 卜 卜匕一太 式接收器以及防止該第一補 Λ板式傳輸器'傳送該第一型；^机號至該天線。 I 16.如申請專利範圍第13項之1C，其中該第— 動電訊系統(UMTS)接收器。 弟—通«式接收器係一通用行 π·如申請專利範圍第13項之1C，其中該第- 訊全球系統(GSM)接收器。 不订動通 18.如申請專利範圍第13項之1C，其中該第〜 型恕訊號係一分頻雙工(FDC〇 13 200816658 訊號。 19·如申請專利範圍第18項之IC，其中由該第一通訊模式接收器所接收之 該第一型態訊號係由一通用陸地無線存取(UTRA)-FDD胞元所產生。 20·如申請專利範圍第Π項之1C，其中該第二型態訊號係一分時多重存取 (TDMA)訊號。 21·如申請專利範圍$ 20項之1C，其中由該第二通訊模式接收器所接收之 該第二型態訊號係由一通用陸地無線存取(UTRA^TDD胞元所產生。 22·如申請專利範圍第20項之IC，其中由該第二通訊模式接收器所接收之 該第二型態訊號係由一行動通訊全球系統(GSM)胞元所產生。 Π 14
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