WO2003013036A1 - Dispositif et procede de commande automatique de gain, et dispositif de radiocommunication - Google Patents
Dispositif et procede de commande automatique de gain, et dispositif de radiocommunication Download PDFInfo
- Publication number
- WO2003013036A1 WO2003013036A1 PCT/JP2002/005299 JP0205299W WO03013036A1 WO 2003013036 A1 WO2003013036 A1 WO 2003013036A1 JP 0205299 W JP0205299 W JP 0205299W WO 03013036 A1 WO03013036 A1 WO 03013036A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- value
- signal strength
- received signal
- average
- gain control
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
- H03G3/3078—Circuits generating control signals for digitally modulated signals
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
- H03G3/3068—Circuits generating control signals for both R.F. and I.F. stages
Definitions
- the present invention relates to an automatic gain control device and method for performing gain control when receiving signals of a plurality of time slots within one frame in a cellular system based on a TDMA system such as a GSM wireless mobile telephone system.
- a communication device Related to a communication device.
- the Global Systems for Mobile Communications (GSM) system has at least one Mobile Services Switching Center (MSC).
- the office is connected to the telephone network.
- the mobile switching center is connected to a plurality of base station controllers (BSCs) provided at a lower level, and these base station control stations further have at least one base station (BTS) provided at a lower level.
- BSCs base station controllers
- BTS base station
- Transceiver Station is connected and communication takes place between them.
- a cell which is a communication area managed by each base station, wireless communication is performed between a mobile station (MS: Mobile Station) and a base station within the area, and a plurality of mobile stations move while moving. It is possible to communicate between the mobile stations or between the mobile station and the telephone network.
- TDMA wireless communication used in the GSM cellular system (GSM system)
- GSM system GSM cellular system
- multiple mobile stations communicate with the base station on a single frequency channel in a time-division manner.
- the mobile station follows the signal timing, frequency, signal strength, and the like of the base station with which communication is performed, ensures synchronization of the receiver with the transmitter, and transmits and receives signals while maintaining the communication state.
- Shadow fading has a spatial correlation that is considered to be common to many wavelengths.
- Rayleigh fading has no correlation between burst signals and varies with time depending on the communication conditions. For this reason, the average of a plurality of burst signals has been averaged to remove the effect of ray-leaf paging.
- the number of time slots assigned to one user (one mobile station) in one frame in the frequency channel used for communication is one.
- the effect of Rayleigh fading can be removed simply by averaging the burst signal in one time slot.
- GPSM General Packet Radio Service
- GPSM General Packet Radio Service
- a burst signal is received over a plurality of time slots. Therefore, in order to remove the influence of Rayleigh fading, it is necessary to average burst signals in a plurality of time slots in one frame.
- a specific time slot may cause fuzzing, channel interference, or timing deviation. If it is significantly affected, the average value of the received signal strength may change significantly due to the change in the signal strength of the time slot. In such a case, automatic gain control cannot be performed to a desired gain, and all time slots are adversely affected by fading or the like, which causes a problem that an error of the automatic gain control increases.
- An object of the present invention is to provide an automatic gain control device and method, and a wireless communication device capable of stably receiving signals of a plurality of time slots in a frame with the same gain setting.
- the automatic gain control device of the present invention is an automatic gain control device that controls signal strength to a predetermined level when performing time-division multislot communication in which communication is performed in a plurality of time slots within a predetermined frame time, Receiving signal strength detecting means for detecting the received signal strength at each of the plurality of time slots; determining whether or not the detected received signal strength is an abnormal value; Average received signal strength value calculating means for performing weighting by giving a smaller weight than the weight in the case of a normal value, and calculating an average value of the received signal strength in each time slot; and the calculated average received signal strength. Determines whether the value is an abnormal value.If the value is abnormal, the weight given to the average received signal strength value of that time slot is greater than the weight when the value is normal.
- a multi-slot reception intensity average calculating means for calculating an average value of a plurality of average reception signal intensity values in a frame by performing weighting with a reduced value; and a gain based on the calculated multi-slot reception intensity average value.
- Gain control means for controlling the received signal strength to a predetermined level by a control signal.
- the average received signal strength value calculating means includes a comparing means for comparing whether the detected received signal strength exceeds a predetermined allowable value, and the average received signal strength value calculating means exceeds the allowable value based on the comparison result.
- a correction value that is regarded as an abnormal value and is a coefficient of the weight is regarded as an abnormal value and is a coefficient of the weight.
- Weighting setting means for setting the value to 0 or a value close to the value.
- the plurality of slot reception strength average value calculation means includes: a comparison means for comparing whether the calculated average reception signal strength value exceeds a predetermined tolerance value; And a weight setting means for setting a correction value, which is a coefficient of the weight, to 0 or a value close thereto when the value exceeds the value.
- the reception signal strength in each of the plurality of time slots is determined.
- the received signal strength is obtained by, for example, periodically sampling each time slot, and it is determined whether or not the received signal strength is an abnormal value.
- the weight given is smaller than the weight in the case of a normal value, and weighting is performed, and the average value of the received signal strength in each weighted time slot is calculated. Then, it is determined whether or not the calculated average received signal strength value is an abnormal value. If the calculated average received signal strength value is an abnormal value, the weight given to the average received signal strength value of the time slot is larger than the weight given to the normal value.
- the weight is reduced and the average value of multiple average received signal strength values in the frame is calculated.
- the average value of the received powers of a plurality of slots is used as a gain control signal in subsequent frames, and automatic gain control is performed so that the received signal strength becomes a predetermined level. This makes it less likely to be affected by fading and the like, and enables burst signals of a plurality of time slots in one frame to be stably received with the same gain setting.
- FIG. 1 is a block diagram showing a configuration of a multi-slot communication receiver including an automatic gain control device according to one embodiment of the present invention.
- FIG. 2 is a block diagram schematically showing a network configuration of a TDMA cellular system.
- FIG. 3 is a diagram showing a frame configuration of the GSM system using eight time slots as an example of a frame configuration of the TDMA system.
- FIG. 4 is a diagram schematically showing the timing and received signal strength of multi-slot reception for receiving burst signals of four time slots in one frame.
- FIG. 5 is a flowchart showing a procedure for obtaining a gain value of the automatic gain control circuit for receiving a burst signal of multi-slot communication in the receiver for multi-slot communication of the present embodiment.
- 1 is an antenna
- 2 is an RF input section
- 3 is an automatic gain control circuit
- 4 is a demodulation section
- 5 is a decoder section
- 6 is a sampling circuit
- 7 is a DSP
- 8 is an audio output.
- 9 is a control section
- 10a is an AGC signal input terminal
- 10b is a synchronization signal input terminal
- 11 to 18 are signal time slots of n-1 frame
- 21 to 28 are signal time slots of n frame
- 31 to 38 are signal time slots of n + 1 frame.
- FIG. 1 is a block diagram showing a configuration of a multi-slot communication receiver provided with an automatic gain control device according to an embodiment of the present invention
- FIG. 2 schematically shows a network configuration of a TDMA type cellular system.
- a multi-slot communication receiver showing an example of a configuration of an automatic gain control device used in receiving means for performing multi-slot communication includes an antenna 1, a radio frequency (RF) input unit 2, a demodulation unit 4, a decoder unit 5, Sampling circuit 6, Digital signal processor (DSP) 7, Audio output unit 8, Control unit 9
- the RF input unit 2 includes an automatic gain control circuit 3 therein, and amplifies the received signal received by the antenna 1 while adjusting the gain.
- the RF input unit 2 controls the AGC signal for determining the gain of the automatic gain control (AGC) and a synchronization signal for synchronizing with a plurality of different burst signals at different times at any time from the control unit 9. It has input terminals 10a and 10b for inputting these signals.
- AGC automatic gain control
- the demodulation circuit 4 demodulates the received signal amplified by the RF input unit 2 and outputs a demodulated signal.
- the decoder unit 5 decodes the demodulated signal and outputs decoded reception data.
- the DSP 7 is programmed and configured exclusively for the receiving circuit, and is configured to perform signal processing on the decoded received data and output the processed signal.
- the received data processed by the DSP 7 is input to the control unit 9 and sent to the audio output unit 8 to be output as an audio signal.
- the sampling circuit 6 periodically samples the received signal strength of the received signal of a plurality of time slots output from the RF input unit 2, and sends the received strength signal indicating the sampled received signal strength to the DSP 7. It has become. This reception strength The intensity signal is signal-processed by the DSP 7 and input to the control unit 9 as a received signal strength value.
- the control unit 9 determines a communication timing based on the reception data obtained by the DSP 7 based on the output of the decoder unit 5 to generate a synchronization signal, and sends it to the automatic gain control circuit 3. To control the synchronous operation. Further, based on the output of the sampling circuit 6, an AGC signal is generated based on the received signal strength value obtained by processing in the DSP 7 and sent to the automatic gain control circuit 3 to control the automatic gain control operation.
- the control section 9 also controls the operation of each section such as the DSP 7.
- the multi-slot communication receiver configured as described above is used as a receiver in a wireless communication device such as a mobile station (MS) or a base station (BTS) in a cellular system as shown in Fig. 2.
- a wireless communication device such as a mobile station (MS) or a base station (BTS) in a cellular system as shown in Fig. 2.
- Can be A cellular system of the TDMA system such as the GSM system has at least one mobile switching center (MSC) 51, and this mobile switching center 51 is connected to a telephone network. Further, the mobile switching center 51 is connected to a plurality of base station control stations (BSC) 52 provided at a lower level, and the base station control station 52 has at least one base station (BTS) provided at a lower level. 53 are connected, and communication is performed between them.
- BSC base station control stations
- BSC base station control stations
- BTS base station
- radio communication is performed between the mobile station (MS) 54 and the base station 53 within the area, and the mobile station 54 moves while moving. Communication is possible between the mobile stations 54 or between the mobile station 54 and the telephone network.
- FIG. 2 shows a state where mobile station 54 moves from cell 1 of base station 53 (BTS 1) to cell 2 of another base station 53 (BTS 2).
- Mobile station 54 initially communicates with base station 53 (BTS 1) over a wireless link.
- the base station 53 (BTS 1) monitors the transmission power of the mobile station 54 during wireless communication, and it is predicted that a handover to another base station 53 (BTS 2) will occur under the control of the base station control station 52. When this occurs, the result of this monitoring is reported to the mobile switching center 51.
- the mobile station 54 receives the neighbor base station list, monitors the signals of the neighbor base stations at regular time intervals based on the list, and reports the result to the base station 53 (BTS 1).
- a message is transmitted to the base station control station 52.
- This message describes the parameters needed to recognize the mobile station 54 and the new channel (time slot) that will be used for communication between the mobile station 54 and the base station 53 (BTS 2). Including overnight.
- BTS 2 base station 53
- BTS 2 base station 53
- BTS 2 base station 53
- Swell the mobile station 54 controls itself to follow the timing, frequency, signal strength, etc. of the burst signal of the base station 53, which is the communication partner, and secures synchronization of the receiver with the transmitter. Signals are transmitted and received while maintaining the communication state.
- FIG. 3 is a diagram showing a frame configuration using eight time slots in the GSM system as an example of a frame configuration in the TDMA system.
- one frame which is one unit of the communication period, is composed of eight time slots 0 to 7 and has a length of 4.615 ms.
- the length of one time slot is 576.9 / s.
- Each time slot is not completely filled by the transmitted burst signal and has a total of 8.25 bits, or 30.5 s, guard period at the beginning and end of the time slot. ing. Therefore, even if the synchronization of the GSM system is not perfect, interference between adjacent time slots is suppressed.
- multi-slot communication is performed for the purpose of improving communication speed, and multiple time slots are assigned to one mobile station (one user) in one frame. Multiple burst signals are received over multiple time slots.
- the burst signal transmitted from the base station 53 is received at the RF input unit 2 via the antenna 1 in the mobile station 54 in the cell.
- the coded audio data included in the burst signal from the base station 53 is decoded by the decoder unit 5 and the DSP 7 After the signal processing, the sound is output from the sound output unit 8 as a sound signal.
- the sampling circuit 6 periodically samples the received signal strengths of the plurality of time slots received by the RF input unit 2, and sends the received strength signal indicating the sampled received signal strength to the DSP 7 for demodulation. . Then, the DSP 7 generates average received signal strength values Ml, M2, M3,..., Mi of each time slot included in one frame, and sends them to the control unit 9.
- the control unit 9 calculates the average value of the average received signal strength values of all the received time slots (average value of the received power of a plurality of slots) AVG to obtain a gain value, and generates an AGC signal based on the gain value. To the input terminal 10a of the RF input unit 2.
- FIG. 4 is a diagram schematically showing the timing of multi-slot reception for receiving burst signals of four time slots in one frame and the received signal strength.
- the horizontal axis represents time
- the vertical axis represents received signal strength.
- the received signal for three frames is shown, and each of n-1 frames 11 and 16 to 18, n frame 21 and 26 to 28, and n + 1 frame 3.1 and 36 to 38
- the time slot is a time slot in which no burst signal is received.
- each time slot from n to 12 of frame 1 to 15, from 22 to 25 of frame n, and from 32 to 35 of frame n + 1 indicate the received signal strength of four consecutive burst signals in each frame. .
- the received signal strength of the burst signal 12 received in the time slot 1 and the average of the previous signal in the same time slot From the received signal strength value, an average received signal strength value M1 in this time slot is obtained.
- the time slot 2 bar The average received signal strength value M 2 is obtained from the burst signal 14 from the burst signal 13, the average received signal strength value M 3 is obtained from the burst signal 14 in the time slot 3, and the average received signal strength value M 4 is obtained from the burst signal 15 in the time slot 4.
- the mean received signal strength (MRSS) of each of these time slots has a predetermined allowable value.
- the maximum and minimum values of the permissible error range for only M2 are indicated by M2MAX and M2MIN, respectively.
- the average value of the M1, M2, M3, and M4 (average reception intensity of multiple slots) AVG is determined.
- the multi-slot reception intensity average value AVG also has a preset allowable value.
- the maximum and minimum values of the allowable error range are indicated by AVG MAX and AVG MIN, respectively.
- the received signal strength P2n at time slot 23 falls below the value of M2MIN
- the received signal strength P2n is regarded as an abnormal value
- the correction value un of P2n is set to 0 or other value.
- the average received signal strength value Mi of a certain time slot exceeds the range of AVG MAX to AVG MIN, the average received signal strength value of the time slot is regarded as an abnormal value, and the correction value wi of Mi is set to 0. Or a value close to it.
- the correction value wi of Mi is set to 0. Or a value close to it.
- an AGC signal is generated from the obtained multi-slot reception intensity average value AVG, and in the next ⁇ + 1 frame, the gain of the automatic gain control circuit 3 is set according to the AVG value. To set.
- FIG. 5 is a flowchart showing a procedure for obtaining the gain value of the automatic gain control circuit for receiving a burst signal in multislot communication in the receiver for multislot communication of the present embodiment. The following procedure will be described focusing on the operation of the control unit 9.
- the gain value of the automatic gain control circuit is obtained by averaging the received signal strength during a predetermined period.
- step S1 the received signal strength Pin of each time slot, the allowable value of the average received signal strength value Mi, and the allowable value? Of the average received signal strength of multiple slots AVG are reset and initialized.
- step S2 the latest received signal strength P in is input from the DSP.
- step S3 the absolute value of the difference between the received signal strength Pin in the predetermined time slot and the average received signal strength value Mi is compared with a preset allowable value of the average received signal strength value Mi. If this value IP in—M i I is larger than the allowable value, the received signal strength Pin of this time slot is regarded as an abnormal value, and the correction value un of the received signal strength Pin is set to 0 or 0 in step S4. Use a close value. On the other hand, if it is smaller than the allowable value, the correction value un of the received signal strength Pin is set to 1 in step S5.
- the reference value used to determine whether the received signal strength Pin is within the allowable value is an average received signal strength value before the own time slot or an average received signal strength value of another time slot. Or the received signal strength of another time slot in the same frame or a previous frame can be used.
- step S7 it is determined whether the calculation of the average received signal strength value Mi has been completed for each time slot of one frame, and the time of one frame is determined.
- the processing of steps S3 to S6 is repeated until the processing is completed for the number of slots or the number of time slots in which the burst signal is received in one frame. When the processing is completed for one frame, the process proceeds to the next step S8.
- step S8 the absolute value of the difference between the average received signal strength value M i in a predetermined time slot and the average value AVG of the plurality of slot reception strengths is calculated based on the preset multi-slot reception strength.
- the average value is compared with the AVG tolerance ⁇ . If this value IM i-AVG
- the previous multi-slot received strength average value may be used, or other values in the same frame or the previous frame may be used.
- the average received signal strength value of the time slot can be used.
- step S11 it is determined whether the setting of the correction value wi of the average received signal strength value Mi has been completed for each time slot of one frame, and the number of timeslots in one frame or the burst signal in one frame is determined.
- the processes in steps S8 to S10 are repeated until the process is completed for the number of received time slots.
- step S12 the average value AVG of the plurality of slot reception intensities of this frame is calculated from the following equation: (wlMl + w2M2 +, '", + wiMi) / i, ie, ⁇ wkMk / i, I do.
- step S13 an AGC signal is generated and output to the automatic gain control circuit 3 based on the multi-slot reception intensity average value AVG thus obtained, and the gain value is set.
- the received signal strength of each of a plurality of time slots is weighted, and an allowable value is set. If the value is considered to be an abnormal value that exceeds, set the weighting correction value to 0 or an approximate value, calculate the average value, set the gain value based on the obtained average value, and receive Performs automatic signal gain control. As a result, it is less susceptible to fusing, etc. Burst signals of multiple time slots in a frame can be received stably with the same gain setting.
- signals of a plurality of time slots within one frame are not affected by fusing and the like, and the same gain is obtained.
- an effect that enables stable reception can be obtained.
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20020730808 EP1414172A1 (en) | 2001-07-27 | 2002-05-30 | Automatic gain controlling device and method, and radio communication device |
US10/478,069 US20040137859A1 (en) | 2001-07-27 | 2002-05-30 | Automatic gain controlling device and method, and radio communication device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001227739A JP3662527B2 (ja) | 2001-07-27 | 2001-07-27 | 自動利得制御装置及び方法、無線通信装置 |
JP2001-227739 | 2001-07-27 |
Publications (1)
Publication Number | Publication Date |
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WO2003013036A1 true WO2003013036A1 (fr) | 2003-02-13 |
Family
ID=19060354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/005299 WO2003013036A1 (fr) | 2001-07-27 | 2002-05-30 | Dispositif et procede de commande automatique de gain, et dispositif de radiocommunication |
Country Status (5)
Country | Link |
---|---|
US (1) | US20040137859A1 (ja) |
EP (1) | EP1414172A1 (ja) |
JP (1) | JP3662527B2 (ja) |
CN (1) | CN1511390A (ja) |
WO (1) | WO2003013036A1 (ja) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10255606A1 (de) * | 2002-11-28 | 2004-06-17 | Infineon Technologies Ag | Verstärkeranordnung, Empfänger mit der Verstärkeranordnung und Verfahren zum Betrieb eines programmierbaren Verstärkers |
US7907589B2 (en) | 2003-12-01 | 2011-03-15 | Panasonic Corporation | Reception apparatus and reception method |
US7801207B2 (en) * | 2005-06-24 | 2010-09-21 | St-Ericsson Sa | Signal processing task scheduling in a communication apparatus |
US7583641B2 (en) * | 2006-05-23 | 2009-09-01 | The Boeing Company | Methods and apparatus for network joining using a multiple message per TDMA control slot methodology |
JP4838064B2 (ja) * | 2006-06-30 | 2011-12-14 | 富士通株式会社 | 自動利得制御装置 |
JP2010093425A (ja) * | 2008-10-06 | 2010-04-22 | Sumitomo Electric Ind Ltd | 基地局装置及び無線通信システム |
US8812676B2 (en) * | 2010-09-03 | 2014-08-19 | Qualcomm Incorporated | Methods and apparatus to select and to reselect a resource for peer discovery in peer-to-peer networks |
CN102594275A (zh) * | 2011-01-07 | 2012-07-18 | 中国科学院微电子研究所 | 自动增益控制的装置及方法 |
JP5682383B2 (ja) * | 2011-03-09 | 2015-03-11 | セイコーエプソン株式会社 | 拍動検出装置 |
CN103634054B (zh) * | 2012-08-23 | 2016-01-20 | 北京邮电大学 | 用于高速相干接收系统的线性损伤补偿和偏振解复用方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0936799A (ja) * | 1995-07-21 | 1997-02-07 | Toshiba Corp | 無線通信装置 |
JPH09247113A (ja) * | 1996-03-07 | 1997-09-19 | Matsushita Electric Ind Co Ltd | Tdmaデータ受信装置 |
JPH09326775A (ja) * | 1996-06-04 | 1997-12-16 | Matsushita Electric Ind Co Ltd | Tdmaデータ受信装置 |
JP2001060981A (ja) * | 1999-08-24 | 2001-03-06 | Hitachi Denshi Ltd | リニア復調方法およびリニア復調を行なう無線機 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3212169B2 (ja) * | 1993-01-06 | 2001-09-25 | 株式会社東芝 | 無線通信システム及び基地局 |
JPH07284141A (ja) * | 1994-04-08 | 1995-10-27 | Oki Electric Ind Co Ltd | ハンドオーバ方法 |
JPH09321736A (ja) * | 1996-05-27 | 1997-12-12 | Sony Corp | 受信方法及び受信装置 |
JPH10322408A (ja) * | 1997-03-19 | 1998-12-04 | Sony Corp | 受信装置及び信号受信方法 |
US6147985A (en) * | 1997-05-01 | 2000-11-14 | Lucent Technologies Inc. | Subspace method for adaptive array weight tracking |
JP2984669B1 (ja) * | 1998-09-11 | 1999-11-29 | 静岡日本電気株式会社 | 簡易携帯電話内蔵型携帯電話機におけるローカル回路 |
US6459889B1 (en) * | 2000-02-29 | 2002-10-01 | Motorola, Inc. | DC offset correction loop for radio receiver |
CN1277441C (zh) * | 2001-01-31 | 2006-09-27 | 三洋电机株式会社 | 无线基地系统和信道分配方法 |
FR2841407B1 (fr) * | 2002-06-20 | 2004-08-13 | Nec Technologies Uk Ltd | Procede d'optimisation de la recherche de cellules dans un reseau de telecommunication mobile |
US6909761B2 (en) * | 2002-12-19 | 2005-06-21 | Motorola, Inc. | Digital communication system having improved pilot encoding |
-
2001
- 2001-07-27 JP JP2001227739A patent/JP3662527B2/ja not_active Expired - Fee Related
-
2002
- 2002-05-30 EP EP20020730808 patent/EP1414172A1/en not_active Withdrawn
- 2002-05-30 WO PCT/JP2002/005299 patent/WO2003013036A1/ja not_active Application Discontinuation
- 2002-05-30 CN CNA028106296A patent/CN1511390A/zh active Pending
- 2002-05-30 US US10/478,069 patent/US20040137859A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0936799A (ja) * | 1995-07-21 | 1997-02-07 | Toshiba Corp | 無線通信装置 |
JPH09247113A (ja) * | 1996-03-07 | 1997-09-19 | Matsushita Electric Ind Co Ltd | Tdmaデータ受信装置 |
JPH09326775A (ja) * | 1996-06-04 | 1997-12-16 | Matsushita Electric Ind Co Ltd | Tdmaデータ受信装置 |
JP2001060981A (ja) * | 1999-08-24 | 2001-03-06 | Hitachi Denshi Ltd | リニア復調方法およびリニア復調を行なう無線機 |
Also Published As
Publication number | Publication date |
---|---|
EP1414172A1 (en) | 2004-04-28 |
JP3662527B2 (ja) | 2005-06-22 |
CN1511390A (zh) | 2004-07-07 |
US20040137859A1 (en) | 2004-07-15 |
JP2003046424A (ja) | 2003-02-14 |
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