WO2001073966A1 - Recepteur sans fil et procede de reception sans fil - Google Patents
Recepteur sans fil et procede de reception sans fil Download PDFInfo
- Publication number
- WO2001073966A1 WO2001073966A1 PCT/JP2001/002459 JP0102459W WO0173966A1 WO 2001073966 A1 WO2001073966 A1 WO 2001073966A1 JP 0102459 W JP0102459 W JP 0102459W WO 0173966 A1 WO0173966 A1 WO 0173966A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- phase
- signal
- value
- phase estimation
- measuring
- 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
- H04B1/7097—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
- H04B1/712—Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
-
- 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
- H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
-
- 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
Definitions
- the present invention relates to a wireless receiving device and a wireless receiving method.
- the CDMA system has attracted attention as one of the multiple access systems for effective use of frequency.
- the CDMA system is a multiple access system that uses spread spectrum technology, and is characterized by being less susceptible to multipath distortion.
- the CDMA communication has the characteristic that a diversity effect can be expected by performing RAKE reception.
- the transmission power control includes a desired signal power to interference wave power ratio (SIR), a desired signal power (Received Signal Strength Indicator; RSSI), an interference signal power (Interference Signal Strength Indicator; This is referred to as “ISSI” below. Therefore, it is very important to accurately measure SIR, RSS I, and I SSI on the receiving side.
- SIR signal power to interference wave power ratio
- RSSI Receiveived Signal Strength Indicator
- ISSI Interference Signal Strength Indicator
- FIG. 1 is a main block diagram showing a schematic configuration of a conventional radio receiving apparatus.
- fingers 1 to n are composed of a despreading unit 11, a phase estimating unit 12, and a phase compensating unit 13.
- the despreading unit 11 performs a despreading process on the received signal to obtain a signal d c shown in equation (1).
- d corr (l, m, n) S (l, m, n) + l (l, m, n) (
- Equation (1) shows the despread signal of the mth slot and the nth symbol of the first finger.
- S is the amplitude of the desired signal
- I is the amplitude of the noise
- ⁇ (m, n) is the modulation phase
- 0 (1, m, n) is the sum of the phase variation due to the propagation path and the phase difference between transmission and reception.
- So (1, m, n) indicate the phase of the noise.
- the phase estimating unit 12 obtains the phase estimation value shown in Expression (2). ).
- N P represents the number of symbols of the pilot symbol.
- the phase estimation value can be obtained by correcting the modulation phase of the received pilot symbol.
- phase estimating section 12 assigns the phase estimation value obtained using equation (2) to a in a plurality of slots (2K slots in equation (3)). Weighted and averaged to obtain the phase estimate. ... (3)
- the phase compensator 1 despread signal d e shown in Equation (1). Phase compensation is performed by complex multiplication of rr with the complex conjugate of the phase estimation value shown in equation (2) or (3). Therefore, each finger 1 ⁇ ! ! The signal d c output from. he becomes as shown in equation (4).
- d coAe (/, w, n) d corr (/, m, n) e (l, m)
- the combining unit 14 outputs the fingers 1 to: Q output signal d c represented by Expression (4). add he .
- the added signal d rake is as shown in equation (5).
- d disturb te ,”!, ") ⁇ cohe (l, m, n)
- N L is the number of Fi Nga fingers 1 to:
- the RS SI measuring unit 16 measures the RS SI by the equation (6) using the RAKE-combined signal d rake .
- Equation (6) indicates the RSSI of the m th slot.
- the square root calculation unit 17 obtains the square root of the R SSI measured by the R SSI measurement unit 16. As a result, the RSS I value is obtained.
- the ISSI measuring unit 18 measures the ISSI according to the equation (7) using the RAKE-combined signal d rake . ... (7)
- Equation (7) shows the ISS I of the m th slot.
- the SIR measuring unit 19 measures the SIR by calculating the ratio between the RSSI measured by the RSSI measuring unit 16 and the ISSI measured by the ISSI measuring unit 18 and outputs the SIR value.
- the division unit 20 obtains an I SSI value by dividing the output of the square root operation unit 17 by the output of the SIR measurement unit 19, and outputs the I SSI value.
- the RSSI is measured by the equation (6) using the signal d rake obtained by the equation (5), and the SSI is measured by the equation (7). Is done. Also, the SIR is measured using the RSSI measured by equation (6) and the ISSI measured by equation (7).
- the RAKE-combined signal d rake is a signal weighted by the average received amplitude, so that the dimension of d rake becomes the second-order dimension. ing. Therefore, according to Equations (6) and (7), when RSSI and DSI are measured using d rake obtained by Equation (5), the dimensions of RSSI and ISSI become the fourth-order dimensions. Become.
- the dimensions of RSSI and ISSI must be essentially the dimensions of power (ie, second-order dimensions). Therefore, in the conventional radio receiving apparatus, the dimensions of RS S I and I S S I are adjusted to the second-order dimension by obtaining the square root of the measured R SSI.
- the output signals d c of the fingers l to n are generated. he is usually a signal weighted with different values for each finger.
- An object of the present invention is to provide a radio receiving apparatus and a radio receiving method capable of accurately measuring reception quality even when R AKE combining is performed on a received signal.
- the phase compensation and the weighting of the Rake synthesis are performed using the normalized phase estimation value.
- FIG. 1 is a main part block diagram showing a schematic configuration of a conventional radio receiving apparatus.
- FIG. 2 is a main block diagram showing a schematic configuration of the wireless receiving apparatus according to Embodiment 1 of the present invention.
- FIG. 3 is a main block diagram showing a schematic configuration of the wireless receiving apparatus according to Embodiment 2 of the present invention.
- FIG. 4 is a main block diagram showing a schematic configuration of the wireless receiving apparatus according to Embodiment 3 of the present invention.
- FIG. 2 is a main block diagram showing a schematic configuration of the wireless reception device according to Embodiment 1 of the present invention.
- the fingers l to n include a despreading unit 101, a phase estimating unit 102, and a phase compensating unit 103.
- Despreading section 101 performs a despreading process on the received signal.
- Phase estimator 1 0 2 finds the phase estimate.
- Phase compensating section 103 performs phase compensation on the despread signal.
- the normalization unit 104 normalizes the phase estimation value obtained for each finger.
- the synthesizing unit 105 adds the output signals of the fingers 1 to n.
- the multiplication unit 106 multiplies the RAKE-combined signal by a predetermined value obtained during the normalization processing.
- Error correction section 107 performs error correction on the signal output from multiplication section 106.
- RSSI measurement section 108 measures RSSI.
- ISSI measurement section 109 measures ISSI.
- the SIR measuring section 110 measures SIR.
- Equation (8) shows the despread signal of the m-th slot of the first finger and the n-th symbol.
- S is the amplitude of the desired signal
- I is the amplitude of the noise
- ⁇ (m, n) is the modulation phase
- 0 (1, m, n) is the sum of the phase variation due to the propagation path and the phase difference between transmission and reception.
- So (1, m, n) indicate the phase of the noise, respectively.
- the phase estimation unit 102 obtains the phase estimation value shown in Expression (9), and outputs it to the normalization unit 104. ) H 1 " 1
- N P represents the number of symbols of the pilot symbol.
- the phase estimation value ⁇ can be obtained by correcting the modulation phase of the received pilot symbol.
- phase estimation section 102 as shown in equation (10), equation (9) (In the formula (10), a total of 2 K Ro Uz g) a plurality of slots the phase estimation value obtained using the average was weighted by ⁇ in, optionally as a phase estimate (
- the normalizing unit 104 normalizes the phase estimation value of each finger.
- the normalization unit 104 normalizes the values by using Expression 11, so that the sum of the magnitudes of the phase estimation values of each finger becomes 1.
- the normalized phase estimation value 3 is output to the phase compensation unit 103.
- the normalization unit 104 outputs the value 5 (m) shown in Equation 12 obtained in the course of the normalization process to the multiplication unit 106.
- the phase compensation unit 103 converts the despread signal d c .
- Phase compensation is performed by complex multiplication of rr and the complex conjugate d of the normalized phase estimate '. Therefore, the signal d c outputted from the Fi Nga 1 to n. he becomes as shown in equation (13).
- d cofte ⁇ , ") d corr (l, m, n ⁇ r (l, m) + / (Z, / n,") e (' ⁇ >>'") ⁇ ... (13)
- the synthesizing unit 105 selects the fingers 1 to! !
- the output signal d c He is added and RAKE synthesis is performed as shown in equation (14).
- NL indicates the number of fingers.
- RAKE-combined signal d rake is output to multiplication section 106, RSSI measurement section 108 and ISSI measurement section 109.
- each symbol of the signal output from the synthesis section 105 is multiplied by the value output from the normalization section 104; 5 (m), and output to the error correction section 107.
- the signal input to error correction section 107 has the same value as the signal input to error correction section 15 in the conventional radio receiving apparatus.
- error correction section 107 performs error correction on the signal output from multiplication section 106. As a result, an overnight reception is obtained.
- the RSSI measuring unit 108 measures the RSSI according to the equation (15) using the signal d rake combined with the rake .
- Equation (15) indicates the RSSI of the m-th slot.
- the measured RSSI is output to a component at the subsequent stage for performing transmission power control and the like and to the SIR measuring unit 110.
- ISSI measuring section 109 measures ISSI by using equation (16) using RAKE-combined signal d rake . Equation (16) shows the ISSI at the m-th slot. ISSJ (m)... (16)
- the measured I SSI is output to the subsequent components that perform transmission power control and the like and to the SIR measurement unit 110.
- the SIR measurement section 110 obtains the ratio between the RSSI measured by the RSSI measurement section 108 and the IOSI measured by the IOSI measurement section 109, so that the SIR is measured.
- the measured SIR is output to a subsequent component that performs transmission power control and the like.
- weighting of phase compensation and RAKE combining is performed using the normalized phase estimation value.
- the synthesized signal can be obtained in the dimension of amplitude. Therefore, according to the radio receiving apparatus according to the present embodiment, it is possible to measure RS SI, ISSI, and SIR in the power dimension, so that even when RAKE combining is performed on a received signal, RSSI, , ISSI and SIR can be accurately measured.
- the RAKE-combined signal obtained in the dimension of the amplitude is multiplied by the divisor /? (M) used in obtaining the phase estimation value.
- the signal input to the error correction unit can have the same value as the signal input to the error correction unit in the above-described conventional radio receiving apparatus. Therefore, according to the radio receiving apparatus according to the present embodiment, error correction processing in which complicated processing is performed can be performed by a conventional method, so that the time and cost required for device development can be reduced. Can be.
- normalization section 104 normalizes the phase estimation value at each finger using Equation 17, and the sum of the magnitudes of the phase estimation values at each finger is May be used. (17)
- the multiplication unit 106 multiplies each symbol of the RAKE-combined signal by a value? (M) shown in Expression 18 obtained in the process of the normalization processing.
- the radio receiving apparatus has substantially the same configuration as Embodiment 1, and differs in that the RAKE-combined signal is divided by the sum of the phase estimation values before normalization.
- FIG. 3 is a main part block diagram showing a schematic configuration of a radio receiving apparatus according to Embodiment 2 of the present invention.
- the same components as those of the first embodiment are denoted by the same reference numerals, and the detailed description is omitted.
- the adding unit 201 calculates the sum of the estimated phase values of each finger.
- Dividing section 202 divides the RAKE-combined signal by the sum of the phase estimation values.
- the phase compensation unit 103 the despread signal d c output from the despreading unit 101. ⁇ and the complex conjugate * of the phase estimation value £ output from the phase estimating unit 102 are subjected to complex multiplication to perform phase compensation, so that the signals d c output from the respective fingers 1 to Q He becomes as shown in equation (19).
- d (l, m, n) d corr (l, m, n) ⁇ '(l, m)
- the RAKE-combined signal d rake is divided by the sum ⁇ (m) of the phase estimation values. However, division is performed only on the symbols for which RSS I, ISS I and S IR are measured.
- the RAKE-combined signal becomes a signal equivalent to the RAKE-combined signal in the first embodiment. That is, the signal output from the division unit 202 is a signal equivalent to a signal that is RAKE-combined after performing phase compensation using the normalized phase estimation value.
- the radio receiving apparatus instead of performing RAKE synthesis on a signal whose phase has been compensated using the normalized phase estimation value, the RAKE-combined signal is subjected to a phase estimation value before normalization. Therefore, it is possible to obtain a RAKE-combined signal in the dimension of amplitude while keeping the configuration of each finger the same as that of the conventional radio receiving apparatus. Therefore, according to the radio receiving apparatus according to the present embodiment, RS SI, I SSI and S IR can be accurately measured without changing the configuration of each finger from the above-described conventional radio receiving apparatus. Therefore, according to the radio receiving apparatus according to the present embodiment, the time and cost required for device development can be reduced.
- the radio receiving apparatus may determine the sum /? (M) of the phase estimation values as shown in Expression 21.
- Equation 21 As described above, by calculating the sum ⁇ (m) of the phase estimation values using Equation 21, RS S I and I S S I reflecting the number of signals to be combined can be measured.
- the radio receiving apparatus has substantially the same configuration as that of the second embodiment, and uses a RAKE-combined signal to perform a division process after measuring RSSI and ISSI. different.
- 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.
- the same components as those of the second embodiment are denoted by the same reference numerals, and the detailed description is omitted.
- the square calculator 301 obtains the square of the sum of the phase estimation values.
- the divider 302 divides the measured R SSI by the square of the sum of the phase estimation values.
- the division unit 303 divides the measured I SSI by the square of the sum of the phase estimation values.
- the sum /? (M) of the phase estimation values obtained by the adding section 201 is output to the square calculating section 301.
- the square of ⁇ (m) is obtained and output to the dividing section 302 and the dividing section 303.
- the RSSI measured by the RSSI measurement unit 108 is divided by the square of /? (M).
- the ISSI measured by the ISSI measurement unit 109 is divided by the square of? (M). This allows RS SI and Issue are compensated.
- the radio reception apparatus instead of performing RAKE combining on a signal that has been phase compensated using the normalized phase estimation value, RSSI and I SS Since the division processing is performed after measuring I, it can be equivalent to obtaining a RAKE-combined signal in the amplitude dimension while keeping the configuration of each finger the same as that of the above-described conventional radio receiving apparatus. Therefore, according to the radio receiving apparatus according to the present embodiment, RS SI, I SSI and S IR can be accurately measured without changing the configuration of each finger from the above-described conventional radio receiving apparatus. Therefore, according to the radio receiving apparatus according to the present embodiment, the time and cost required for device development can be reduced.
- the present invention can be applied to a base station device used in a wireless communication system and a communication terminal device such as a mobile station device that performs wireless communication with the base station device.
- the reception quality can be measured in the power dimension at the communication terminal device and the base station device, so that the reception quality can be accurately measured even when RAKE combining is performed on the received signal. .
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU42803/01A AU4280301A (en) | 2000-03-28 | 2001-03-27 | Wireless receiver and method of wireless reception |
EP01915821A EP1182796A1 (en) | 2000-03-28 | 2001-03-27 | Wireless receiver and method of wireless reception |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000-89361 | 2000-03-28 | ||
JP2000089361A JP3308962B2 (ja) | 2000-03-28 | 2000-03-28 | 無線受信装置および無線受信方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001073966A1 true WO2001073966A1 (fr) | 2001-10-04 |
Family
ID=18605130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/002459 WO2001073966A1 (fr) | 2000-03-28 | 2001-03-27 | Recepteur sans fil et procede de reception sans fil |
Country Status (6)
Country | Link |
---|---|
US (1) | US20030012261A1 (ja) |
EP (1) | EP1182796A1 (ja) |
JP (1) | JP3308962B2 (ja) |
CN (1) | CN1365545A (ja) |
AU (1) | AU4280301A (ja) |
WO (1) | WO2001073966A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2373135A (en) * | 2001-02-28 | 2002-09-11 | Nec Corp | Estimation of ISSI, RSSI and SIR in a receiver |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3588087B2 (ja) * | 2002-04-19 | 2004-11-10 | 松下電器産業株式会社 | Sir測定装置および方法 |
US6888498B2 (en) | 2002-09-24 | 2005-05-03 | Honeywell International, Inc. | Method and system for compensating satellite signals |
US7555262B2 (en) | 2002-09-24 | 2009-06-30 | Honeywell International Inc. | Radio frequency interference monitor |
EP1782550A2 (en) * | 2002-09-24 | 2007-05-09 | Honeywell International Inc. | Method and system for compensating satellite signals |
KR100551133B1 (ko) * | 2003-02-07 | 2006-02-13 | 엘지전자 주식회사 | 레이크 수신기 및 이를 위한 신호를 수신하는 방법 |
CN100352170C (zh) * | 2004-04-19 | 2007-11-28 | 中兴通讯股份有限公司 | 时分复用无线通信系统频率校正的装置和方法 |
US7711033B2 (en) | 2005-04-14 | 2010-05-04 | Telefonaktiebolaget Lm Ericsson (Publ) | SIR prediction method and apparatus |
US9942511B2 (en) | 2005-10-31 | 2018-04-10 | Invention Science Fund I, Llc | Preservation/degradation of video/audio aspects of a data stream |
CN101022284B (zh) * | 2007-03-21 | 2010-12-08 | 中兴通讯股份有限公司 | 一种用于无线接收机接收符号的归一化方法及装置 |
WO2014045483A1 (ja) | 2012-09-18 | 2014-03-27 | 日本電気株式会社 | 受信品質測定装置及び受信品質測定方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10233756A (ja) * | 1997-02-20 | 1998-09-02 | Kokusai Electric Co Ltd | マルチパスの最大比合成回路 |
JPH112651A (ja) * | 1997-06-11 | 1999-01-06 | Nippon Telegr & Teleph Corp <Ntt> | 信号電力比推定装置 |
JPH11150761A (ja) * | 1997-11-14 | 1999-06-02 | Nec Mobile Commun Ltd | W−cdma方式によって無線通信を行う移動通信システム |
JPH11274982A (ja) * | 1998-03-26 | 1999-10-08 | Sony Corp | 復調装置及び復調方法 |
EP0969604A2 (en) * | 1998-07-02 | 2000-01-05 | Texas Instruments Incorporated | Signal to interference ratio estimation |
JP2000049662A (ja) * | 1998-08-03 | 2000-02-18 | Nec Corp | Cdma受信装置における復調回路 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6633553B1 (en) * | 1998-12-31 | 2003-10-14 | Samsung Electronics Co., Ltd. | Apparatus and method for forward power controlling in CDMA mobile telecommunication system |
JP2001024555A (ja) * | 1999-07-02 | 2001-01-26 | Nec Mobile Commun Ltd | Cdma通信装置および送信電力制御方法 |
CN1132357C (zh) * | 2000-08-21 | 2003-12-24 | 华为技术有限公司 | 一种信号干扰比的测量方法及装置 |
-
2000
- 2000-03-28 JP JP2000089361A patent/JP3308962B2/ja not_active Expired - Fee Related
-
2001
- 2001-03-27 WO PCT/JP2001/002459 patent/WO2001073966A1/ja not_active Application Discontinuation
- 2001-03-27 AU AU42803/01A patent/AU4280301A/en not_active Abandoned
- 2001-03-27 CN CN01800563A patent/CN1365545A/zh active Pending
- 2001-03-27 US US09/979,085 patent/US20030012261A1/en not_active Abandoned
- 2001-03-27 EP EP01915821A patent/EP1182796A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10233756A (ja) * | 1997-02-20 | 1998-09-02 | Kokusai Electric Co Ltd | マルチパスの最大比合成回路 |
JPH112651A (ja) * | 1997-06-11 | 1999-01-06 | Nippon Telegr & Teleph Corp <Ntt> | 信号電力比推定装置 |
JPH11150761A (ja) * | 1997-11-14 | 1999-06-02 | Nec Mobile Commun Ltd | W−cdma方式によって無線通信を行う移動通信システム |
JPH11274982A (ja) * | 1998-03-26 | 1999-10-08 | Sony Corp | 復調装置及び復調方法 |
EP0969604A2 (en) * | 1998-07-02 | 2000-01-05 | Texas Instruments Incorporated | Signal to interference ratio estimation |
JP2000049662A (ja) * | 1998-08-03 | 2000-02-18 | Nec Corp | Cdma受信装置における復調回路 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2373135A (en) * | 2001-02-28 | 2002-09-11 | Nec Corp | Estimation of ISSI, RSSI and SIR in a receiver |
GB2373135B (en) * | 2001-02-28 | 2005-04-20 | Nec Corp | Receiver and method of operation thereof |
Also Published As
Publication number | Publication date |
---|---|
AU4280301A (en) | 2001-10-08 |
JP2001285127A (ja) | 2001-10-12 |
EP1182796A1 (en) | 2002-02-27 |
US20030012261A1 (en) | 2003-01-16 |
CN1365545A (zh) | 2002-08-21 |
JP3308962B2 (ja) | 2002-07-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR100284722B1 (ko) | 레이크 수신기와 이 레이크 수신기를 갖춘 스펙트럼확산통신장치 | |
JP2914445B2 (ja) | Cdma適応受信装置 | |
JP3813490B2 (ja) | スペクトラム拡散レイク受信機 | |
WO2001073966A1 (fr) | Recepteur sans fil et procede de reception sans fil | |
US7548595B2 (en) | Apparatus and method for fading frequency estimation | |
KR19990078221A (ko) | 복조장치및복조방법 | |
WO2007003680A1 (en) | A method and device for pilot power measurement in a receiver | |
JP3559030B2 (ja) | 無線受信装置及びsir算出方法 | |
JP2002531994A (ja) | 通信システムにおいてフェーディング修正指数を決定する方法 | |
JP3317286B2 (ja) | 復調方法及び復調回路 | |
US6847616B2 (en) | Reception apparatus for estimating the state of a transmission channel using a known signal | |
US7526012B2 (en) | Interference reduction apparatus and method | |
US6330431B1 (en) | Method and apparatus for measuring signal quality in a wireless communication system | |
JP2000078110A (ja) | Rake受信機,無線受信装置およびrake受信機のパス検出方法 | |
US6944208B2 (en) | Interference signal canceling apparatus and interference signal canceling method | |
JP3474826B2 (ja) | 受信レベル測定方法及び受信レベル測定回路 | |
JP2002043980A (ja) | 無線受信装置および無線受信方法 | |
JP2001077744A (ja) | 移動通信システムにおける同期検波装置、送受信装置及び干渉除去装置 | |
JP4057342B2 (ja) | 受信レベル測定回路 | |
JP3419749B2 (ja) | 受信装置および受信方法 | |
JP2003051763A (ja) | 周波数拡散多重伝送システムに用いられる受信装置とその伝送路応答推定方法 | |
JP3702163B2 (ja) | 無線受信システム | |
JP2003264514A (ja) | 受信レベル測定回路 | |
WO2000064086A1 (fr) | Recepteur a spectre etale et procede de reception de signaux | |
JP2004289758A (ja) | 干渉低減装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 01800563.2 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2001915821 Country of ref document: EP |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 09979085 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 2001915821 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 2001915821 Country of ref document: EP |