WO2001093447A1 - Recepteur radio et procede de reception - Google Patents
Recepteur radio et procede de reception Download PDFInfo
- Publication number
- WO2001093447A1 WO2001093447A1 PCT/JP2001/004541 JP0104541W WO0193447A1 WO 2001093447 A1 WO2001093447 A1 WO 2001093447A1 JP 0104541 W JP0104541 W JP 0104541W WO 0193447 A1 WO0193447 A1 WO 0193447A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- phase
- signal
- despreading process
- despreading
- signals
- Prior art date
Links
Classifications
-
- 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
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7073—Synchronisation aspects
- H04B1/7075—Synchronisation aspects with code phase acquisition
-
- 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
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7113—Determination of path profile
-
- 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
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
- H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
-
- 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
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7073—Synchronisation aspects
- H04B1/7075—Synchronisation aspects with code phase acquisition
- H04B1/70758—Multimode search, i.e. using multiple search strategies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
- H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
- H04B2201/70702—Intercell-related aspects
Definitions
- the present invention relates to a wireless receiving device and a wireless receiving method.
- Landscape technology
- the present inventors have previously invented a storage-type wireless receiver for the purpose of improving the performance of cell search and the like.
- the storage-type radio receiving apparatus temporarily stores received data in a memory or the like, and repeatedly performs despreading processing on the stored data using a spreading code assigned to each base station. .
- This invention is described in Japanese Patent Application No. 10-292425.
- a radio receiving apparatus may add received signals in-phase in order to improve reception characteristics.
- a storage-type wireless receiver is a device for obtaining the results of despreading for a plurality of base stations from the same received signal, and is therefore not very suitable for situations where signals from one base station are received.
- An object of the present invention is to provide a radio receiving apparatus and a radio receiving method capable of performing appropriate reception according to a communication state of the own station or a signal receiving state and improving reception characteristics.
- the same reception temporarily held Performing despreading processing on signals with spreading codes corresponding to a plurality of communication partners, and performing despreading processing on signals received as needed with spreading codes corresponding to one communication partner; was changed as appropriate according to the communication status of the own station.
- the number of signals to be subjected to in-phase addition next time is controlled in accordance with a value calculated from a signal after in-phase addition.
- FIG. 1 is a main part block diagram showing a schematic configuration of a radio receiving apparatus according to Embodiment 1 of the present invention.
- FIG. 2 is a main part block diagram showing a schematic configuration of the wireless receiving apparatus according to Embodiment 2 of the present invention.
- FIG. 3 is a diagram illustrating an example of an output of the in-phase adding unit of the wireless reception device according to Embodiment 2 of the present invention.
- FIG. 4 is a main part block diagram showing a schematic configuration of a radio receiving apparatus according to Embodiment 3 of the present invention.
- FIG. 5 is a main part block diagram showing a schematic configuration of a radio receiving apparatus according to Embodiment 4 of the present invention.
- FIG. 6 is a main part block diagram showing a schematic configuration of a radio receiving apparatus according to Embodiment 5 of the present invention.
- the radio receiving apparatus performs despreading processing repeatedly on a temporarily held received signal according to the communication state of its own station, Switching between performing despreading processing and delay Create a mouth file.
- the storage-type wireless receiving apparatus invented by the present inventors previously holds a received signal in a memory or the like once, and repeatedly despreads the held signal using a spreading code assigned to each base station. I do. Thereby, the accuracy of cell search can be improved.
- the present invention c the contents described in Japanese Patent Application No. 1 0 2 9 2 5 4 No. 5, all previously incorporated by reference herein.
- a received signal held in a memory or the like is repeatedly used to create a delay profile, so that reception characteristics are improved in a state where communication is performed with a plurality of base stations. It can, but is not well suited for situations where communication with a single base station occurs. This is because when the wireless receiver communicates with one base station, it is only necessary to create a delay profile for one base station, so it is better to create a delay profile for signals received in real time. This is because reception characteristics are improved.
- the radio receiving apparatus performs despreading processing repeatedly on the held received signal and performs despreading processing on the received signal as needed according to the communication state of the own station. Create a delay profile by switching between the cases.
- the radio receiving apparatus when it is necessary to create a delay profile for a plurality of base stations at the time of handover or the like, it repeatedly performs despreading processing on the received signal held, When it is necessary to create a delay profile for one base station at times, despreading processing is performed on the received signal as needed.
- FIG. 1 is a main block diagram showing a schematic configuration of a wireless receiving apparatus according to Embodiment 1 of the present invention.
- a radio receiving unit 102 performs predetermined radio processing (down conversion, A / D conversion, etc.) on a signal received via an antenna 101.
- the switching determination unit 103 determines the communication state of the own station and controls switching of the switch 104 according to the communication state.
- the reception signal storage unit 105 temporarily stores the reception signal output from the wireless reception unit 102 for each predetermined unit.
- Correlation value calculation section 106 performs despreading processing on the received signal.
- the receiving base station control unit 107 sequentially selects base stations to be received.
- the base station changeover switches 108, 110, and 112 operate in such a manner that when the received signal is stored in the received signal storage unit 105, the correlation value is added in-phase to each base station. The switching is controlled by the receiving base station control unit 107.
- the memory 109 and the adder 111 add the signals output from the correlation value calculator 106 (that is, the correlation values) in-phase. Also, as many memories 109 as the number of base stations that can be received are prepared. Here, for convenience of explanation, it is assumed that the number of base stations that can be received is three base stations 1 to 3.
- the squaring unit 113 squares the signal in-phase added by the memory 109 and the adder 111.
- the delay profile averaging unit 114 calculates the average value of the delay profile.
- the finger allocating unit 115 allocates a finger to an individual communication channel signal or the like according to the averaged delay profile.
- the despreading unit 116 performs despreading processing on the individual communication channel signal and the like according to the finger assignment.
- the demodulation unit 117 performs a predetermined demodulation process on the despread individual communication channel signal and the like. As a result, you can get an overnight
- the switch 104 is switched to the correlation value calculation unit 106 by the switching determination unit 103, and wireless reception is performed.
- the section 102 and the correlation value calculating section 106 are connected.
- Switching decision section By means of 103, a signal indicating one base station currently communicating with the own station (here, base station 1 in this case) is output to receiving base station control section 107.
- the received signal is output from the switch 104 to the correlation value calculation unit 106 as it is. That is, when it is necessary to create a delay profile for one base station at the time of standby or the like, the received signal is not stored in received signal storage section 105.
- the correlation value calculation unit 106 and the base station switching switches 108, 110, and 112 receive the base station control unit 10 From 7, the base station number indicating base station 1 is output.
- Correlation value calculation section 106 performs a despreading process on the received signal using the spreading code assigned to base station 1 according to the base station number.
- the base station switching switch 108 connects the adder 111 to the memory 109 of the base station 1 according to the base station number.
- the base station switching switch 110 connects the memory 109 of the base station 1 to the adder 111, and the base station switching switch 112 connects the memories 109 and 2 of the base station 1. Connect the riding section 1 1 3 Then, the signals output from the correlation value calculation unit 106 are in-phase-added a predetermined number of times for the base station 1 by the memory 1 ⁇ 9 and the adder 111.
- the signal subjected to the in-phase addition a predetermined number of times is output from the memory 109 to the squaring unit 113, squared by the squaring unit 113, and averaged by the delay profile averaging unit 114. Therefore, an averaged delay profile is output from delay profile averaging section 114. Then, a signal indicating the position of each finger on the averaged delay profile is output to despreading section 116 by finger allocating section 115.
- the despreading section 1 16 performs despreading processing on the individual communication channel signal and the like transmitted from the base station 1 that has been subjected to predetermined radio processing by the radio reception section 102 according to the timing at which each finger hits. .
- the despread individual communication channel signal etc. A predetermined demodulation process is performed in the demodulation unit 117, whereby the data from the base station 1 is obtained.
- the switching determination unit 103 switches the switch 104 to the reception signal storage unit 105 side, and the radio reception unit. 102 and the received signal storage section 105 are connected. Also, the switching determination unit 103 outputs signals indicating a plurality of base stations (here, base stations 1 to 3) to the reception base station control unit 10 #.
- the received signal is output from the switch 104 to the received signal storage unit 105. That is, when it is necessary to create a delay profile for a plurality of base stations at the time of handover or the like, the received signal is temporarily stored in the received signal storage unit 105.
- the received signal held in the received signal storage unit 105 is output to the correlation value calculation unit 106 in accordance with an instruction from the reception base station control unit 107.
- the base station number indicating the base station 1 is output from the receiving base station control unit 107 to the correlation value calculation unit 106 and the base station changeover switches 108, 110, and 112.
- the correlation value calculation unit 106 performs a despreading process on the received signal according to the base station number using a spreading code assigned to the base station 1.
- the base station switching switch 108 connects the adder 111 to the memory 109 of the base station 1 according to the base station number.
- the base station switching switch 110 connects the memory 109 of the base station 1 to the adder 111, and the base station switching switch 112 connects the memories 109 and 2 of the base station 1. Connect the riding section 1 1 3
- the signal output from the correlation value calculation unit 106 is In-phase addition is performed a predetermined number of times for the base station 1 by the memory 109 and the adder 111.
- the same received signal used for base station 1 is output from received signal storage section 105 to correlation value calculation section 106 in accordance with an instruction from receiving base station control section 107.
- the base station number indicating the base station 2 is output from the reception base station control unit 107 to the correlation value calculation unit 106 and the base station switching switches 1 108, 110, and 112. Is done.
- the despreading process is repeatedly performed on the temporarily held received signal according to the communication state of the own station, and the received signal is received as needed. Since the despreading process is appropriately switched between the signal and the delay profile, the delay profile can be efficiently created according to the communication state.
- the number of signals to be in-phase-added according to the magnitude of the phase difference between signals after in-phase addition (hereinafter, referred to as “in-phase addition number”). It changes adaptively.
- FIG. 2 is a main part block diagram showing a schematic configuration of a wireless receiving apparatus according to Embodiment 2 of the present invention. Note that the same components as those in Embodiment 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.
- a correlation value calculator 201 performs despreading processing on a received signal.
- the in-phase adder 202 includes a memory 203 and an adder 204, and in-phase adds the signal output from the correlation value calculator 201 while adaptively changing the number of in-phase additions. . How to change the in-phase addition number will be described later.
- the angle calculation unit 205 calculates an angle difference (that is, a phase difference) on the I-Q plane between the signals after the in-phase addition sequentially output from the memory 203.
- the in-phase addition control unit 206 adaptively adjusts the in-phase addition number according to the angle difference calculated by the angle calculation unit 205.
- the signal output from the correlation value calculation unit 201 is subjected to in-phase addition a plurality of times by the memory 203 and the adder 204.
- the in-phase addition is performed eight times, for example.
- the signal subjected to in-phase addition is output to angle calculation section 205 and square section 113.
- FIG. 3 is a diagram illustrating an example of an output of the in-phase adding unit of the wireless reception device according to Embodiment 2 of the present invention.
- the signals added eight times and sequentially output from the memory 203 are shown as an in-phase addition output # (i-1) and an in-phase addition output #i, respectively.
- the angle ⁇ ⁇ between the in-phase addition outputs shown in FIG. 3 is the angle 0 i of the previous in-phase addition output # (i ⁇ 1) and the angle 0 2 of the current in-phase addition output #i. Is calculated using More specifically, the angle calculator 205 first calculates the angle S i on the I-Q plane for the in-phase addition output # (i-l) and the angle ⁇ on the I-Q plane for the in-phase addition output #i. Calculate 2 . Then, the angle calculation unit 205 calculates the absolute value S of the difference between S i and O 2 . The signal indicating the calculated value of 0 is output to in-phase addition number control section 206.
- In-phase addition number control section 206 compares 0 calculated by angle calculation section 205 with a predetermined threshold value. When the value calculated by the angle calculation unit 205 is larger than a predetermined threshold value, the in-phase addition number control unit 206 sets the in-phase addition unit 200 to reduce the in-phase addition number. 2 is controlled and angle calculation When S calculated by the unit 205 is equal to or smaller than a predetermined threshold, the in-phase addition unit 202 is controlled so as to increase the number of in-phase additions.
- the in-phase addition unit 202 adjusts the number of in-phase additions at the next in-phase addition to add the signals output from the correlation value calculation unit 201 in-phase.
- the in-phase addition number control unit 206 sets the in-phase addition number to four times, which is a half of the previous time, when the next delay profile is created. By this control, the next time 0 is calculated, 0 becomes smaller than 180 degrees.
- the number of in-phase additions is halved, it is considered that 3 will be about 90 ° at the next calculation of 0.
- the in-phase addition number control unit 206 sets the in-phase addition number to 16 times the previous time when creating the next delay profile.
- the reason why the number of in-phase additions is controlled in this way is that, in the in-phase addition, the effect of the in-phase addition is lost as the angle 0 (ie, the phase difference) between the signals subjected to the in-phase addition increases. That is, in the in-phase addition, since the amplitude value of each signal is added as a vector value, the amplitude value of the vector-combined signal after the in-phase addition becomes smaller as the value of each signal 0 becomes larger. For example, when each degree 0 between signals is 180 degrees, if the amplitude values of the signals are equal, the amplitude value of the signal after the in-phase addition becomes 0.
- the in-phase addition number control unit 206 sets the in-phase addition number to 1 when 1 calculated by the angle calculation unit 205 is larger than a predetermined threshold value.
- a configuration may be employed in which the in-phase addition unit 202 is controlled. That is, when 0 calculated by the angle calculation unit 205 is larger than the predetermined threshold, power addition may be performed.
- the signal after in-phase addition is performed. Since the number of in-phase additions is adaptively changed according to the magnitude of the phase difference between signals, even when a frequency error occurs in the received signal, the optimum number is always used without using a frequency estimation circuit. A delay profile can be created. (Embodiment 3)
- the wireless receiving apparatus according to Embodiment 3 of the present invention has substantially the same configuration as wireless receiving apparatus according to Embodiment 2, and obtains angle 0 instead of calculating angle 0 between in-phase addition outputs.
- the difference is that the inner product value between the in-phase addition outputs calculated by a simpler operation than the operation is calculated.
- FIG. 4 is a main part block diagram showing a schematic configuration of a wireless receiving apparatus according to Embodiment 3 of the present invention.
- the components having the same configuration as in the second embodiment are denoted by the same reference numerals, and detailed description is omitted.
- an inner product calculation unit 401 calculates an inner product value between in-phase addition outputs.
- the in-phase addition number control unit 402 adjusts the in-phase addition number adaptively according to the inner product value calculated by the inner product calculation unit 401.
- the in-phase addition number control unit 402 sets the in-phase addition unit to reduce the in-phase addition number when the inner product value calculated by the inner product operation unit 401 is larger than a predetermined threshold value.
- the in-phase addition unit 202 is controlled so as to increase the number of in-phase additions.
- the receiving apparatus of the present embodiment instead of calculating the angle ⁇ between the in-phase addition outputs, the inner product value between the in-phase addition outputs obtained by a simpler calculation than the calculation of the angle ⁇ Therefore, the amount of calculation can be reduced as compared with the second embodiment.
- the radio receiving apparatus has substantially the same configuration as the radio receiving apparatus according to the second embodiment, and has an amplitude value larger than a predetermined threshold. Only the angle difference ⁇ is calculated.
- FIG. 5 is a main part block diagram showing a schematic configuration of the wireless receiving apparatus according to Embodiment 4 of the present invention.
- the components having the same configuration as in the second embodiment are denoted by the same reference numerals, and detailed description is omitted.
- a comparison unit 501 compares an amplitude value of the in-phase addition output with a predetermined threshold value, and outputs only an in-phase addition output whose amplitude value is larger than the predetermined threshold value to the angle calculation unit 5. 0 Output to 2. Therefore, the angle calculation unit 5.02 outputs the angle difference 0 only for the in-phase addition output whose amplitude value is larger than the predetermined threshold value.
- angle difference 0 is calculated only for an in-phase addition output whose amplitude value is greater than a predetermined threshold value. Can be well created.
- this embodiment can be implemented in combination with the radio receiving apparatus according to Embodiment 3. That is, in the radio receiving apparatus according to Embodiment 3, it is possible to calculate the inner product value only for the in-phase addition output whose amplitude value is larger than the predetermined threshold value. When implemented in combination, a highly accurate delay port file can be created efficiently.
- the wireless receiving apparatus has substantially the same configuration as the wireless receiving apparatus according to the second embodiment, and the angle between the in-phase addition outputs only at the timing to which the finger is currently assigned. The difference 0 is calculated.
- a radio receiving apparatus according to Embodiment 5 of the present invention will be described.
- FIG. 6 is a main part block diagram showing a schematic configuration of the radio receiving apparatus according to Embodiment 5 of the present invention.
- the components having the same configuration as in the second embodiment are denoted by the same reference numerals, and detailed description is omitted.
- finger allocating section 601 allocates a finger to an individual communication channel signal and the like, and outputs a signal indicating the timing at which the finger is currently allocated to angle calculating section 602.
- the angle calculator 602 calculates the angle difference 0 between the in-phase addition outputs only at the timing at which the finger is currently assigned.
- the present embodiment can be implemented in combination with the wireless receiving apparatus according to the third embodiment. That is, in the radio receiving apparatus according to Embodiment 3, it is possible to calculate the inner product value between the in-phase addition outputs only at the timing when the finger is currently assigned. When implemented in combination, a highly accurate delay profile can be created efficiently.
- the first embodiment can be implemented in combination with the second to fifth embodiments.
- the present invention it is possible to improve reception characteristics by performing appropriate reception according to the communication state of the own station and the signal reception state.
- the present invention can be applied to a communication terminal device and a base station device used in a mobile communication system.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20010934415 EP1195919A1 (en) | 2000-05-30 | 2001-05-30 | Radio receiving device and radio receiving method |
AU60654/01A AU6065401A (en) | 2000-05-30 | 2001-05-30 | Radio receiving device and radio receiving method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000-160155 | 2000-05-30 | ||
JP2000160155A JP3445221B2 (ja) | 2000-05-30 | 2000-05-30 | 無線受信装置および無線受信方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001093447A1 true WO2001093447A1 (fr) | 2001-12-06 |
Family
ID=18664389
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/004541 WO2001093447A1 (fr) | 2000-05-30 | 2001-05-30 | Recepteur radio et procede de reception |
Country Status (6)
Country | Link |
---|---|
US (1) | US20020106006A1 (ja) |
EP (1) | EP1195919A1 (ja) |
JP (1) | JP3445221B2 (ja) |
CN (1) | CN1162982C (ja) |
AU (1) | AU6065401A (ja) |
WO (1) | WO2001093447A1 (ja) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10271034A (ja) * | 1997-03-26 | 1998-10-09 | Matsushita Electric Ind Co Ltd | Cdma移動体通信受信装置 |
JP2000049659A (ja) * | 1998-07-28 | 2000-02-18 | Nec Corp | ランダムアクセスチャネル用受信装置 |
JP2000124832A (ja) * | 1998-10-14 | 2000-04-28 | Matsushita Electric Ind Co Ltd | Cdma受信装置における逆拡散回路及び方法 |
JP2000151558A (ja) * | 1998-11-16 | 2000-05-30 | Fujitsu Ltd | Cdma通信において使用される受信装置 |
JP2000244366A (ja) * | 1999-02-24 | 2000-09-08 | Nec Corp | Cdma受信装置の受信パス・サーチ方法およびサーチャー回路 |
JP2000244387A (ja) * | 1999-02-23 | 2000-09-08 | Kokusai Electric Co Ltd | 同期方法及び同期回路 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6785257B1 (en) * | 1999-02-24 | 2004-08-31 | Kokusai Electric Co., Ltd. | Base station |
JP2000307470A (ja) * | 1999-04-16 | 2000-11-02 | Matsushita Electric Ind Co Ltd | 受信装置 |
JP2001211101A (ja) * | 2000-01-26 | 2001-08-03 | Nec Corp | 低消費電力cdma受信機、及びその消費電力低減方法 |
-
2000
- 2000-05-30 JP JP2000160155A patent/JP3445221B2/ja not_active Expired - Fee Related
-
2001
- 2001-05-30 EP EP20010934415 patent/EP1195919A1/en not_active Withdrawn
- 2001-05-30 US US10/048,218 patent/US20020106006A1/en not_active Abandoned
- 2001-05-30 CN CNB018015050A patent/CN1162982C/zh not_active Expired - Fee Related
- 2001-05-30 AU AU60654/01A patent/AU6065401A/en not_active Abandoned
- 2001-05-30 WO PCT/JP2001/004541 patent/WO2001093447A1/ja not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10271034A (ja) * | 1997-03-26 | 1998-10-09 | Matsushita Electric Ind Co Ltd | Cdma移動体通信受信装置 |
JP2000049659A (ja) * | 1998-07-28 | 2000-02-18 | Nec Corp | ランダムアクセスチャネル用受信装置 |
JP2000124832A (ja) * | 1998-10-14 | 2000-04-28 | Matsushita Electric Ind Co Ltd | Cdma受信装置における逆拡散回路及び方法 |
JP2000151558A (ja) * | 1998-11-16 | 2000-05-30 | Fujitsu Ltd | Cdma通信において使用される受信装置 |
JP2000244387A (ja) * | 1999-02-23 | 2000-09-08 | Kokusai Electric Co Ltd | 同期方法及び同期回路 |
JP2000244366A (ja) * | 1999-02-24 | 2000-09-08 | Nec Corp | Cdma受信装置の受信パス・サーチ方法およびサーチャー回路 |
Also Published As
Publication number | Publication date |
---|---|
US20020106006A1 (en) | 2002-08-08 |
JP3445221B2 (ja) | 2003-09-08 |
EP1195919A1 (en) | 2002-04-10 |
AU6065401A (en) | 2001-12-11 |
CN1381097A (zh) | 2002-11-20 |
JP2001339324A (ja) | 2001-12-07 |
CN1162982C (zh) | 2004-08-18 |
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