GB2324663A - PC monitoring of receiver level, A/D conversion and reception conditions - Google Patents
PC monitoring of receiver level, A/D conversion and reception conditions Download PDFInfo
- Publication number
- GB2324663A GB2324663A GB9808472A GB9808472A GB2324663A GB 2324663 A GB2324663 A GB 2324663A GB 9808472 A GB9808472 A GB 9808472A GB 9808472 A GB9808472 A GB 9808472A GB 2324663 A GB2324663 A GB 2324663A
- Authority
- GB
- United Kingdom
- Prior art keywords
- radio
- terminal device
- receivable
- radio terminal
- electric field
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/001—Digital control of analog signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Circuits Of Receivers In General (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A personal computer 1 controls adjustments of an associated radio section 6 and A/D converter 7. In particular an instruction is sent to the controller 10 to supply a reference signal to the A/D converter instead of the received signal. The output of the A/D converter is buffered in memory 8 before being transmitter to the personal computer. After this the personal computer instructs the controller to supply upper and lower bound signals from the signal generator 3 instead of the received signal. Related received signal strength indication (RSSI) signals are buffered in memory 8 before being transmitted to the personal computer. Using this information the personal computer calculates a threshold value for distinguishing between communicable and non-communicable radio areas.
Description
MnIOD OF ADJUSTING THE RECEIVABLE LEVEL OF AN ELECTRIC
FIELD RECEIVABLE BY A RADIO TERMINAL DEVICE
The present invention relates to a method of adjusting the receivable level of the electric field of a radio signal receivable by a radio terminal device.
A conventional radio terminal device is provided with a controller and a memory, as disclosed in Japanese Patent Laid-Open Publication No. 63-77275. In such a radio terminal device, first, the dispersion in RSSI (received signal strength indication) of a radio section and the correction of an analog-digital (A/D) converter are adjusted on assembling the device, and then the adjustment of a threshold value for discriminating between a communicable radio area and an uncommunicable radio area is conducted once. Thereafter, a threshold value level signal is input to the device to measure its value, and software within a memory is changed to complete the adjustment of the threshold value.
In this conventional adjusting method of the radio terminal device, it is difficult to adjust this device after assembly, and a problem in maintenance of the device arises when the device is used.
Accordingly, it is an object of at least the preferred embodiment of the present invention to provide a method of adjusting a level of a receivable electric field of a radio terminal device, in view of the aforementioned problem of the prior art, which is capable of carrying out adjustment of correction data of an A/D converter and dispersion of a radio section after assembling the device.
In a first aspect, the present invention provides a method of adjusting the receivable level of the electric field of a radio section receivable by a radio terminal device including an analog-digital converter and a radio section, said method comprising measuring correction data of the analog-digital converter and the dispersion of the receivable electric field level of the radio section in the radio terminal device, calculating outside of the radio terminal device a threshold value for discriminating between a communicable radio area and an uncommunicable radio area of the radio terminal device on the basis of the correction data of the analog-digital converter and the dispersion of the receivable electric field level, and utilising the calculation result in the radio terminal device.
In a preferred embodiment, an adjusting method of a receivable electric field level of a radio terminal device, including an A/D converter and a radio section, comprises the steps of measuring correction data (a value of a reference voltage corrected by the A/D converter when the reference voltage is converted thereby) of the A/D converter and dispersion of receivable electric field level of the radio section in the radio terminal device, calculating a threshold value for discriminating between a radio communicable area and a radio uncommunicable area outside of the radio terminal device on the basis of the correction data of the AID converter and the data of the dispersion of the receivable electric field level, and controlling the calculation result in the radio terminal device.
In one preferred embodiment, there is a personal computer for sending a command for measuring the correction data and a command for measuring the receivable electric field level to the radio terminal device when the radio terminal device measures the correction data and the dispersion of the receivable electric field level, collects measuring data and calculates the threshold value.
In another aspect, the present invention provides a system for adjusting the range of a radio section of a radio terminal device, preferably for use in adjusting a receivable electric field level of a radio terminal device, which comprises a personal computer, said radio terminal device being connected to the personal computer by means of a serial line, the radio terminal device including a power circuit connected to a power source for supplying an electric power voltage thereto, said radio section being coupled with a signal generator arranged to output a receivable level signal thereto, an analog-digital (A/D) converter, a memory, a serial port and a controller.
In another aspect, the present invention provides a method of measuring correction data for an analog-digital converter of a radio terminal device whilst adjusting the dispersion of a receivable level of the electric field of a radio signal receivable by said device, said method comprising the steps of receiving a command for measuring said correction data from a personal computer, stopping the operation of the radio terminal device, supplying a reference voltage to said A/D converter from a power circuit, converting the reference voltage into digital data and outputting said digital data to a memory of said device, storing temporarily the digital data in a memory, and reading the converted correction data from the memory and outputting said data to said personal computer.
In a preferred embodiment, a method of measuring a correction data for a radio terminal device at the time adjusting dispersion comprises the steps of receiving command for measuring a correction data of an A/D converter from a personal computer via a serial port, stopping operation of the radio terminal device by means of a controller, supplying a reference voltage to the A/D converter from a power circuit, converting the reference voltage into digital data to output this digital data to the controller before receiving the reference voltage by means of the A/D converter, storing temporarily the received data into a memory by means of the controller, and reading the measured converted correction data out of the memory and outputting this data to a personal computer via a serial port by means of the controller when there is no unmeasured data.
In yet another aspect, the present invention provides a method of measuring the dispersion of a receivable level of the electric field of a radio signal in a radio section of a radio terminal device and adjusting said dispersion, said method comprising the steps of receiving a command for adjusting said dispersion from a personal computer switching the radio section to an operative state in order to read a received signal strength indication (RSSI) thereof, receiving a signal representing the maximum value of the receivable electric field level and sending the RSSI value thereof to an A/D converter of the radio terminal device, converting said RSSI value into digital data, storing temporarily the digital data in a memory, and reading the stored data from the memory, and transmitting the stored data to said personal computer.
In a preferred embodiment, a method of measuring a dispersion of a receivable electric field
level of the radio section for a radio terminal device at the
time adjusting dispersion comprlses the steps of inputting
a command for adjusting the dispersion of the receive
electric field level from the personal computer - via the
seria-l port, making the radio section operative in order to
read the RSSI of the radio-section by means of a controller,
receiving a signal representing the maximum value of the
receive electric field level from. the signal generator and
sending its RSSI value to the A/D converter by means of the
radio section, converting the RSSI value into digital data
and sending the converted data to the controller by means of
the A/D converter, storing temporarily the received data into
the memory by means of the controller, and reading the collected dispersin-data of the receive electric field level
out of the memory, and sending the data to the personal
computer via the serial port by means of the controller when
there is no uncollected data.
According to the above, the adjustment of
the dispersion of RSSI of the radio section and the
correction of the A/D converter can be carried out from the
outside of the radio terminal device and the radio terminal
device controls only the result of the adjustment. Hence,
the adjustment after the device assemble can be readily
carried out, and in case that the radio section includes no
signal adjusting means of the receive electric field level,
the adjustment can be implemented.
Preferably, - a personal computer sends a command for measuring the correction data
and a command for measuring the receive electric field level
to the radio terminal device when the radio terminal device measures the correction. data and the dispersion of the receive electric field level, collects measuring data and calculates the threshold the threshold value. ~ Preferred features of the present invention will now be described, purely by
way of example only, with reference to the accompanying drawings, in which:
Fig. 1 is a block diagram of a measuring system for adjusting dispersion of a radie section of a radio termini device for use in a method of adjusting a level of receivable electric field -of a radio terminal device;
Fig. 2 is a ~sequential representation stowing data flow between a personal computer and a radio terminal device
Fig. 3 is a flow chart showing an operation of a method of adjusting a level of receivable electric field of a radio terminal device;
Fig. 4 is a graphical representation showing an approximation curve of an electric field level in the adjusting method.
Referring now to the drawings, there is shown in Fig.
1 a measuring system for adjusting dispersion of a radio section of a radio terminal device for use in a method of adjusting a: level of. receiv ble electric field of a radio terminal device.
In Fig. 1, a personal computer 1 is connected to a radio terminal device 4 by a serial line. The radio terminal device 4 includes zit tower circuit 5 connected to a power source 2, a. radio section 6 coupled with a signal-generator 3, an analog-digital (A/D)-converter-7 7 for converting analog -values such as an RSSI value and a reference voltage-into
their digital values, a memory 8, a serial port 9 and a
controller 10. The power source 2 supplies an electric power voltage to the power circuit 5. The signal generator 3 outputs a receivable level signal to the radio section 6.
Fig. 2 shows data flow between a personal computer and a radio terminal device in the adjusting method.
Fig. 3 is a flow chart showing an operation of a method of adjusting a level of a receivable electric field
of a radio terminal device.
Fig. 4 shows an - approximation curve of an
electric field level.
In Fig. 2, when the personal computer sends a command
for measuring correction data of the A/D converter 7 to the
radio terminal device 4 in step 11, the radio terminal device
4 starts measuring the correction data of the A/D converter
7.
An operation of the measuring of correction data in the
radio terminal device 4 will be described with reference to
Fig. 3.
First, the controller 10 receives the command for measuring the correction data of the A/D converter 7 from the personal computer 1-via the serial-port 9 in step 21. The
controller 10 stops the operation of the radio terminal
device 4 in step 22, to supply the reference voltage to the
A/D converter 7 from the power circuit 5 in step 23. After receipt of the reference voltage, the A/D converter 7 converts
the reference voltage into digital data to output this
digital data to the controller 10 in step 24. The controller
10 temporarily stores the received data into the memory in
step 25; If there is unmeasured data, for example, the
minimum reference voltage in step 26, steps 23 to 25 are
executed again. When there is no unmeasured data in step 26,
the controller 10 reads the measured converted correction
data out of the memory 8 and outputs this data to the
personal computer 1 via the serial port 9 in step 27.
The personal computer 1. stores the measured converted
correction data in a memory within the personal computer 1.
The personal computer 1 then sends a command for measuring
the dispersiorr of a. level out receivable electric field of the radio
section 6 to-the radio terminal device 4. - Theradio terminal device 4 then measures the dispersion data of the radio section 6 arid sends the measured data to the pers-onal
computer 1, as follows.
The radio terminal device 4 starts measuring in step
28 in Fig. 3 and the controller 10 inputs a command for
adjusting the dispersion of the level of the receivable electric field
from the personal computer 1 via the serial port 9. The
controller 10 makes the radio section 6 operative in order to
read the RSSI of the radio section 6 in step 29. The radio
section 6 receives a signal representing the maximum value of
the receivable electric field level from the signal generator 3
and sends its RSSI value to the A/D converter 7 in step 30.
The A/D converter 7 converts the RSSI value into digital data
and sends the converted data to the controller 10 in step 31.
The controller 10 temporarily stores the received data into
the memory 8 in step 32. When there are any uncollected data
such as the minimum value of the receivable electric freld level
in step 33, the controller 10 carries out steps 30 to 32
repeatedly. There ls no uncollected data in step 33, the
controller 10 reads the collected dispersion data of the
receivable electric field level out of the memory 8, and sends
the data to the personal computer 1 via the serial port 9 in
step 34.
The personal computer 1 calculates a threshold value
for doscriminating~between a communicable radio . area and
an uncommunicable radio area on the basis of the converted
corrected data of the .A/D converter 7 and the dlspersion data of the receivable electric field level, and - -outputs the - calculaThedThhreshold value data to the radio terminal device
4 in step 15 in-Fig. 2.
When calculating the - threshold value for
discriminating between the uncommunicable radio area and the
uncommunicable radio area, the personal computer 1 uses the
following formula.
y = a*x + b ............ (1)
Formula (1) shows an electric field level
approximation line, as shown in Fig. 4, taking the receivable
electric field level in the y-axis direction and the
reference voltage converted by the A/D converter 7 in the
x-axis direction. In formula (1), a represents the slope of
the electric field level approximation line and b represents
the intercept against the taxis. -
The personal computer 1 substitutes the value V2 obtained by converting the maximum reference voltage in the
A/D converter 7 and the maximum value RSSImax of the receivable electric field level for x and y .in formula (1) to obtain the following formula.
RSSImax = a*V2 + b .*... (2)
The personal computer 1-also substitutes the value V1 obtained by converting the minimum reference voltage -in the
A/D converter 7 and the minimum value RSSImin of the -receivable electric field level for x and y in formula (1) to obtain the following formula.
RSSImin = a*V1 + b ..... (3)
The personal computer 1 then eliminates the intercept b using the formulas (2) and (3) to obtain the slope a of the electric field level approximation line as-follows.
a -- (RSSImax - RSSImin) / (V2 --VI) ... (4)
The personal computer~ 1 substitutes the slope a of formula (4) for the slope a in formula (3) to obtain the intercept b as follows.
b = RSSImin - a*V1~ (5)
The personal computer 1 substitutes the obtained slope a of the electric field level approximation line, the intercept b against the y-axis, and the value of the electric field level y -for discriminating between the communicable radio area and the uncommunicable radio area for those in formula (1) to obtain the value x. That is, the threshold value Vn for discriminating between the communicable radio area and the uncommunicable radio - area is calculated as follows.
-Vn = (RSSI area discrimination level - b)/a .. (6)
The personal computer 1 sends the obtained threshold value Vn using formula (6) to the radio terminal device 4 via
the serial port 9.
In the radio terminal device 4, the controller 10
receives - the threshold value Vn from the personal computer 1
via the serial port 9 in step 35 in Fig. 3. The controller
10 then stores the threshold value Vn into the memory 8 in
step 36 to complete the. adjustment operation.
As described above, in a method of adjusting a
receivable electric field level of a radio terminal device,
the following advantages
can be obtained.
(1) A correction of RSSI dispersion of the radio
section, a correction value measuring of the A/D converter
can be carried out from the outside of the radio terminal device, and only a threshold value for discriminating between a - radio communicable area and an unconrmunicable radio - area can be controlled inthe radio terminal device. As a result, the adjustment after the device assembly can be readily performed.
(2) - In case that the radio section includes no signal adjusting means of the receivable electric field level, the
adjustment can be carried out.
While the present invention has been described in its preferred embodiments with reference to the accompanying
drawings, it will be appreciated that various changes and modifications can be made by those skilled in the art without
departing from the spirit and scope of the present invention.
Each feature disclosed in this specification (which term includes the claims) and/or shown in the drawings may be incorporated in the invention independently of other disclosed and/or illustrated features.
The text of the abstract filed herewith is repeated below as part of the specification.
A method of adjusting a level of a receivable electric field of a radio terminal device including an analog-digital converter and a radio section. The radio terminal device measures correction data of the analog-digital converter and dispersion of a receivable electric field level of the radio section upon receipt of a command from a personal computer. The adjustment of the correction data of the analog-digital converter and the dispersion data of the receivable electric field level is implemented outside of the radio terminal device. The personal computer calculates a threshold value for discriminating between a communicable radio area and an uncommunicable radio area on the basis of the correction data of the analog-digital converter and the dispersion data-of the receivable electric field level to send the threshold value to the radio terminal device. The radio terminal device stores the threshold value in a memory.
Claims (8)
1. A method of adjusting the receivable level of the electric field of a radio signal
receivable by a radio terminal device including an analog-digital converter and
a radio section, said method comprising:
measuring correction data of the analog-digital converter and the
dispersion of the receivable electric field level of the radio section in the radio
terminal device;
calculating outside of the radio terminal device a threshold value for
discriminating between a communicable radio area and an uncommunicable
radio area of the radio terminal device on the basis of the correction data of
the analog-digital converter and the dispersion of the receivable electric field
level; and
utilising the calculation result in the radio terminal device.
2. A method according to Claim 1, wherein a command for measuring the
correction data and a command for measuring the receivable electric field level
are output to the radio terminal device from a personal computer when the
radio terminal device measures the correction data and the dispersion of the
receivable electric field level, said personal computer receiving the measuring
data and calculating the threshold value.
3. A system for adjusting the receivable level of the electric field of a radio
signal receivable by a radio terminal device including an analog-digital
converter and a radio section, said system comprising:
means for measuring correction data of the analog-digital converter and
the dispersion of the receivable electric field level of the radio section in the
radio terminal device;
means for calculating outside of the radio terminal device a threshold
value for discriminating between a communicable radio area and an
uncommunicable radio area of the radio terminal device on the basis of the
correction data of the analog digital converter and the dispersion of the
receivable electric field level; and
means for utilising the calculation result in the radio terminal device.
4. A method of measuring correction data for an analog-digital converter of a
radio terminal device whilst adjusting the dispersion of a receivable level of
the electric field of a radio signal receivable by said device, said method
comprising the steps of:
receiving a command for measuring said correction data from a
personal computer;
stopping the operation of the radio terminal device;
supplying a reference voltage to said A/O converter from a power
circuit;
converting the reference voltage into digital data and outputting said
digital data to a memory of said device;
storing temporarily the digital data in said memory; and
reading the converted correction data from the memory and outputting
said data to said personal computer.
5. A method of measuring the dispersion of a receivable level of the electric field
of a radio signal in a radio section of a radio terminal device and adjusting
said dispersion, said method comprising the steps of:
receiving a command for adjusting said dispersion from a personal
computer;
switching the radio section to an operative state in order to read a
received signal strength indication (RSSI) thereof;
receiving a signal representing the maximum value of the receivable
electric field level and sending the RSSI value thereof to an A/D converter of
the radio terminal device;
converting said RSSl value into digital data;
storing temporarily the digital data in a memory, reading the stored
data from the memory, and sending the data to the personal computer.
6. A system for measuring the dispersion of a receivable level of the electric field
of a radio signal in a radio section of a radio terminal device and adjusting the
said dispersion, said system comprising:
a personal computer;
said radio terminal device comprising a serial port for receiving a
command for adjusting said dispersion;
control means for switching the radio section to an operative state in
order to read a received signal strength indication (RSSI) thereof;
a signal generator, said radio section being arranged to receive a signal
representing the maximum value of the receivable electric field level from said
signal generator and sending the RSSI value thereof to an A/I) converter of the
radio terminal device;
said A/D converter being adapted to convert said RSSI value into
digital data and output the converted data to the control means; and
said control means being arranged to store temporarily the digital data
in a memory, read the stored data from the memory, and send the data to said
personal computer via the serial port.
7. A system for adjusting the dispersion of a radio section of a radio terminal
device, comprising:
a personal computer, said radio terminal device being connected to said
personal computer by means of a serial line;
said radio terminal device comprising:
a power circuit connected to a power source for supplying an electric
power voltage thereto;
said radio section being coupled to a signal generator for outputting a
receivable signal level thereto;
an analog-digital (A/D) converter for converting an analog receivable
signal strength identification value and a reference voltage to respective digital
values;
a memory;
a serial port; and
a controller.
8. A method or system for adjusting the receivable level of the electric field of
a radio signal receivable by a radio terminal device, for measuring correction
data, or for measuring the dispersion level of said radio signal substantially as
herein described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0031685A GB2355609B (en) | 1997-04-21 | 1998-04-21 | Method of adjusting the receivable level of an electric field receivable by a radio terminal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9103228A JPH10294696A (en) | 1997-04-21 | 1997-04-21 | Method for adjusting reception electric field level of wireless terminal |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9808472D0 GB9808472D0 (en) | 1998-06-17 |
| GB2324663A true GB2324663A (en) | 1998-10-28 |
| GB2324663B GB2324663B (en) | 2001-03-28 |
Family
ID=14348621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9808472A Expired - Fee Related GB2324663B (en) | 1997-04-21 | 1998-04-21 | Method of adjusting the receivable level of an electric field receivable by a radio terminal device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH10294696A (en) |
| AU (1) | AU737673B2 (en) |
| GB (1) | GB2324663B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4090601B2 (en) * | 1998-12-16 | 2008-05-28 | パナソニック コミュニケーションズ株式会社 | Wireless communication apparatus and wireless communication system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2199711A (en) * | 1987-01-08 | 1988-07-13 | Schlumberger Electronics | Converter calibration |
| US5555277A (en) * | 1993-12-01 | 1996-09-10 | Datapoint Corporation | Technique for cancelling common mode switching noise to achieve reduced error rates in a local area network |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI108765B (en) * | 1993-09-28 | 2002-03-15 | Nokia Corp | Method and apparatus for measuring gain errors in the receiver of a base station in a cellular radio system and for specifying the field strength measurement |
-
1997
- 1997-04-21 JP JP9103228A patent/JPH10294696A/en active Pending
-
1998
- 1998-04-21 GB GB9808472A patent/GB2324663B/en not_active Expired - Fee Related
- 1998-04-21 AU AU63502/98A patent/AU737673B2/en not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2199711A (en) * | 1987-01-08 | 1988-07-13 | Schlumberger Electronics | Converter calibration |
| US5555277A (en) * | 1993-12-01 | 1996-09-10 | Datapoint Corporation | Technique for cancelling common mode switching noise to achieve reduced error rates in a local area network |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9808472D0 (en) | 1998-06-17 |
| GB2324663B (en) | 2001-03-28 |
| AU737673B2 (en) | 2001-08-30 |
| AU6350298A (en) | 1998-10-22 |
| JPH10294696A (en) | 1998-11-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20020421 |