US20020110108A1 - Simple block space time transmit diversity using multiple spreading codes - Google Patents
Simple block space time transmit diversity using multiple spreading codes Download PDFInfo
- Publication number
- US20020110108A1 US20020110108A1 US09/999,287 US99928701A US2002110108A1 US 20020110108 A1 US20020110108 A1 US 20020110108A1 US 99928701 A US99928701 A US 99928701A US 2002110108 A1 US2002110108 A1 US 2002110108A1
- Authority
- US
- United States
- Prior art keywords
- data field
- symbols
- transmitter
- data
- sub
- 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.)
- Abandoned
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0697—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using spatial multiplexing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0631—Receiver arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
- H04L25/03866—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using scrambling
Definitions
- the present invention relates to communications systems imploring code division multiple access (CDMA) techniques. More particularly, the present invention relates to a transmission diversity scheme which can be applied to a CDMA communication system.
- CDMA code division multiple access
- Space-time block codes operate on a block of input symbols producing a matrix output over antennas and time.
- the first data field having a first portion, D 1 , and a second portion, D 2 , is transmitted by the first antenna.
- a second data field is produced by modifying the first data field.
- the negation of the conjugate of D 2 , -D 2 *, is the first portion of the second data field and the conjugate of D 1 , D 1 *, is the second portion.
- the second data field is simultaneously transmitted by the second antenna.
- joint detection requires the use of two joint detectors at the receiver in a system employing two transmit diversity antennas.
- Each joint detection device estimates the data from one of the antennas. The estimated data is combined to produce the original data. Therefore, the receiver in such a system has a high complexity resulting in higher receiver expense.
- the present invention is a system and method for use in a CDMA communication system including a plurality of base stations and a user equipment (UE), each for communicating with each other.
- the base station has a transmitter which includes a first and second antenna for transmitting a data field of symbols.
- the first spreading device spreads the first data field using a first channelization code and the second spreading device spreads the second data field using a second channelization code, each channelization code being uniquely associated with one of the first and second antennas.
- the UE has a receiver for receiving a signal including the first and second spread data fields.
- the UE includes a joint detection device for detecting the symbols of the first and second data fields using the first and second channelization codes and a decoder for decoding the detected data fields to generate a single data field of symbols.
- FIG. 1 is a block diagram of a prior art communication system employing space-time transmit diversity.
- FIG. 2 is a block diagram of a transmitter and receiver in a communication system in accordance with the preferred embodiment of the present invention.
- FIG. 3 is a flow diagram of the transmit diversity system of the present invention.
- FIG. 4 is a graph of the performance of the transmit diversity system of the present invention.
- FIG. 5 is a block diagram of a transmitter and receiver in a communication system in accordance with an alternative embodiment of the present invention.
- FIG. 6 is a flow diagram of an alternative transmit diversity system of the present invention.
- FIG. 2 is a block diagram of a transmitter 10 , preferably located at a base station, and a receiver 20 , preferably located at a user equipment (UE), in a CDMA communication system in accordance with the preferred embodiment of the present invention.
- UE user equipment
- the transmitter 10 comprises a block encoder 11 , a plurality of channelization devices 8 , 9 , a plurality of spreading sequence insertion devices 12 , 13 , and a plurality of antennas 15 , 16 .
- FIG. 1 illustrates a transmitter comprising two (2) antennas, it should be apparent to those having skill in the art that more than two (2) antennas may be used, such as N antennas.
- a typical communication burst has two data fields separated by a midamble sequence.
- the same encoding procedure, as discussed in the following, for one data field is also performed on the other data field.
- Data to be transmitted by the transmitter is produced by a data generator (not shown).
- the resulting data symbols (S 1 , S 2 , . . . S N/2 ), (S N/2+1 , S N/2+2 , . . . , S N ) of the first data field, which can be represented by sub-data fields D 1 and D 2 are input into the block encoder 11 , preferably a block space-time transmit diversity (BSTTD) encoder.
- BSTTD block space-time transmit diversity
- the block encoder 11 encodes the input symbols and generates the complex conjugate of D 1 and the negation of the conjugate of D 2 : D 1 *, ⁇ D 2 *.
- the encoder 11 also changes the order of the symbols so that ⁇ D 2 * is ahead of D 1 *.
- an analogous encoding of the second data field is also performed.
- the data fields, D 1 , D 2 and ⁇ D 2 *, D 1 * are forwarded to a first and second channelization device 8 , 9 , respectively.
- the first channelization device 8 spreads the data blocks D 1 , D 2 by a first channelization code, and ⁇ D 2 *, D 1 * by the second channelization device 9 using a second different channelization code.
- Each of the spread data blocks from the first and second channelization devices 8 , 9 are then scrambled by the scrambling code associated with the transmitter 10 .
- the receiver 20 comprises a joint detection device (JD) 24 , a BSTTD decoder 22 , a channel estimation device 23 and an antenna 26 .
- the antenna 26 of the UE receives various RF signals including the communication bursts 17 , 18 from the transmitter 10 .
- the RF signals are then demodulated to produce a baseband signal.
- the baseband signal is then forwarded to the joint detection device 24 and the channel estimation device 23 .
- the channel estimation device 23 provides channel information, such as channel impulse responses, to the joint detection device 24 .
- the joint detection device 24 coupled to the channel estimation device 23 and BSTTD decoder 22 , utilizes the channel information and the channelization codes to detect the soft data symbols d 1 , d 2 , ⁇ d 2 *, d 1 * in the received signal.
- the channel impulse response for each burst is determined using that burst's midamble sequence. Since each burst was transmitted using a different spreading code, the joint detection device 24 treats each burst as being transmitted by a different user. As a result, any joint detection device which can recover data from different transmitter sites may be used.
- Such joint detection devices include zero forcing block linear equalizers, detection devices using Cholesky or approximate Cholesky decomposition, as well as many others.
- the joint detection device 24 estimates the data symbols of each of the bursts 17 , 18 output by the transmitter antennas 15 , 16 and forwards the estimates to the BSTTD decoder 22 .
- the BSTTD decoder 22 coupled to the joint detection device 24 , receives the estimated soft data symbols d 1 , d 2 and ⁇ d 2 *, d 1 * corresponding to the antennas 15 , 16 and decodes the symbols to yield a single data field's soft symbols, d STTD .
- a data generator generates data to be transmitted to the receiver 20 (step 301 ). Each data field is separated into two sub-data fields D 1 , D 2 (step 302 ). The sub-data fields D 1 , D 2 are forwarded to the block encoder 11 and the first channelization device 8 (step 303 ). The sub-data fields forwarded to the block encoder 11 are encoded (step 304 ) and forwarded to the second channelization device 9 (step 305 ). Each channelization device 8 , 9 spreads their respective data input using a separate channelization code associated with a respective antenna 15 , 16 (step 306 ). The two spread signals are then scrambled, using the scrambling code associated with the base station (step 307 ) and transmitted to the receiver 20 over diversity antennas 15 , 16 (step 308 ).
- the receiver 20 receives a RF communication signal including the two spread signals from the diversity antennas 15 , 16 (step 309 ), demodulates the signal and forwards the demodulated signal to the channel estimation device 23 and joint detection device 24 (step 310 ).
- the received signal is processed by the channel estimation device 23 (step 311 ) and the channel information applied by the joint detection device 24 along with the channelization codes, to estimate the transmit symbols from the diversity antennas 15 , 16 (step 312 ).
- the detected sub-data fields, corresponding to each diversity antenna 15 , 16 are forwarded to the BSTTD decoder (step 313 ), which decodes the soft symbol sub-fields to yield a single data field's soft symbols, d STTD (step 314 ).
- FIG. 5 is a block diagram of an alternative transmitter 40 , preferably located at a base station, and a receiver 50 , preferably located a user equipment (UE) in a communication system.
- the transmitter 40 comprises a plurality of channelization devices 48 , 49 , a plurality of spreading sequence insertion devices 42 , 43 , and a plurality of antennas 45 , 46 .
- Data to be transmitted by the transmitter 40 is produced by a data generator (not shown).
- the resulting data symbols (S 1 , S 2 , . . . S N/2 ), (S N/2 +1, S N/2 +2, . . . , S N ) of the first data field, which can be represented by sub-data fields D 1 and D 2 are input to a first and second channelization device 48 , 49 , respectively.
- the first channelization device 8 spreads the data blocks D 1 , D 2 by a first channelization code
- the second channelization device 49 spreads the data blocks D 1 , D 2 by a second different channelization code.
- Each of the spread data blocks from the first and second channelization devices 48 , 49 are scrambled by the scrambling code associated with the transmitter 40 .
- the receiver 50 comprises a joint detection device (JD) 54 , a decoder 22 , a channel estimation device 53 and an antenna 51 .
- the antenna 51 of the UE receives various RF signals including the communication bursts 44 , 45 from the transmitter 40 .
- the RF signals are then demodulated to produce a baseband signal.
- the baseband signal is then forwarded to the joint detection device 54 and the channel estimation device 53 .
- the joint detection device 54 coupled to the channel estimation device 53 and decoder 52 , utilizes the channel information and the channelization codes to detect the soft data symbols d 1 , d 2 , in the received signal.
- the channel impulse response for each burst is determined using that burst's midamble sequence. Since each burst was transmitted using a different spreading code, the joint detection device 54 treats each burst as being transmitted by a different user.
- the joint detection device 54 estimates the data symbols of each of the signals 44 , 45 output by the transmitter antennas 46 , 47 and forwards the estimates to the decoder 52 .
- the decoder 52 coupled to the joint detection device 54 , receives the estimated soft data symbols d 1 , d 2 corresponding to the antennas 46 , 47 and decodes the symbols to yield a single data field's soft symbols, d.
- a data generator generates data to be transmitted to the receiver 40 (step 601 ). Each data field is separated into two sub-data fields D 1 , D 2 (step 602 ). The sub-data fields D 1 , D 2 are forwarded to the first channelization device 48 and to the second channelization device 49 (step 603 ). Each channelization device 48 , 49 spreads their respective data input using a separate channelization code associated with each antenna 46 , 47 (step 604 ). The two spread signals are then scrambled, using the scrambling code associated with the base station (step 605 ) and transmitted to the receiver 50 over diversity antennas 46 , 47 (step 606 ).
- the receiver 50 receives a RF communication signal including the two spread signals from the diversity antennas 46 , 47 (step 607 ), demodulates the signal and forwards the demodulated signal to the channel estimation device 53 and joint detection device 54 (step 608 ).
- the received signal is processed by the channel estimation device 53 (step 609 ) and the channel information applied by the joint detection device 54 along with the channelization codes, to estimate the transmit symbols from the diversity antennas 46 , 47 (step 610 ).
- the detected sub-data fields, corresponding to each diversity antenna 46 , 47 are forwarded to the decoder 52 (step 611 ), which decodes the soft symbol sub-fields to yield a single data field's soft symbols, d STTD (step 612 ).
- each antenna has its own associated channelization code and midamble. If a block encoder is used, the data field transmitted by each of the antennas has a unique encoding, allowing the use of a single joint detector at the receiver.
- FIG. 4 is a graph showing the raw BER of various block STTD decoders.
- the model is based on all the receivers using a block linear equalizer (BLE) based approach to JD.
- NTD means the single antenna case, i.e., no transmit diversity.
- STTD with 1 code is the traditional block STTD JD.
- STTD with 2 code is the disclosed block STTD transmitter.
- Simple STTD with 2 code is the transmission system disclosed in the alternative embodiment.
- the benefit of 2 codes for STTD can be summarized as follows: 1) there is up to a 0.5 dB gain at 0 . 01 raw Bit error rate over 1 code STTD; and 2) by eliminating the encoding block in simple STTD with 2 code, the performance degradation is only 0.2 dB at 0.1 raw BER and no degradation at 0.01 raw BER. The performance improvement over NTD is still 1.0 dB and 2.7 dB at 0 . 1 and 0.01 raw BER.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Radio Transmission System (AREA)
- Mobile Radio Communication Systems (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Circuits Of Receivers In General (AREA)
- Radar Systems Or Details Thereof (AREA)
- Radio Relay Systems (AREA)
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/999,287 US20020110108A1 (en) | 2000-12-07 | 2001-11-15 | Simple block space time transmit diversity using multiple spreading codes |
US10/071,903 US20020093927A1 (en) | 2000-12-07 | 2002-02-08 | Simple block space time transmit diversity using multiple spreading codes |
US10/071,917 US20020089953A1 (en) | 2000-12-07 | 2002-02-08 | Simple block space time transmit diversity using multiple spreading codes |
US10/077,565 US20020075832A1 (en) | 2000-12-07 | 2002-02-15 | Simple block space time transmit diversity using multiple spreading codes |
US10/077,076 US20020089955A1 (en) | 2000-12-07 | 2002-02-15 | Simple block space time transmit diversity using multiple spreading codes |
US10/079,107 US20020080746A1 (en) | 2000-12-07 | 2002-02-20 | Simple block space time transmit diversity using multiple spreading codes |
US10/107,465 US20020097699A1 (en) | 2000-12-07 | 2002-03-27 | Transmit diversity using multiple spreading codes |
US12/627,630 US8311492B2 (en) | 2000-12-07 | 2009-11-30 | Simple block space time transmit diversity using multiple spreading codes |
US13/647,042 US20130044734A1 (en) | 2000-12-07 | 2012-10-08 | Simple block space time transmit diversity using multiple spreading codes |
US14/692,415 US20150229349A1 (en) | 2000-12-07 | 2015-04-21 | Simple block space time transmit diversity using multiple spreading codes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US25401300P | 2000-12-07 | 2000-12-07 | |
US09/999,287 US20020110108A1 (en) | 2000-12-07 | 2001-11-15 | Simple block space time transmit diversity using multiple spreading codes |
Related Child Applications (6)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/071,917 Continuation US20020089953A1 (en) | 2000-12-07 | 2002-02-08 | Simple block space time transmit diversity using multiple spreading codes |
US10/071,903 Continuation US20020093927A1 (en) | 2000-12-07 | 2002-02-08 | Simple block space time transmit diversity using multiple spreading codes |
US10/077,076 Continuation US20020089955A1 (en) | 2000-12-07 | 2002-02-15 | Simple block space time transmit diversity using multiple spreading codes |
US10/077,565 Continuation US20020075832A1 (en) | 2000-12-07 | 2002-02-15 | Simple block space time transmit diversity using multiple spreading codes |
US10/079,107 Continuation US20020080746A1 (en) | 2000-12-07 | 2002-02-20 | Simple block space time transmit diversity using multiple spreading codes |
US10/107,465 Continuation US20020097699A1 (en) | 2000-12-07 | 2002-03-27 | Transmit diversity using multiple spreading codes |
Publications (1)
Publication Number | Publication Date |
---|---|
US20020110108A1 true US20020110108A1 (en) | 2002-08-15 |
Family
ID=22962586
Family Applications (10)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/999,287 Abandoned US20020110108A1 (en) | 2000-12-07 | 2001-11-15 | Simple block space time transmit diversity using multiple spreading codes |
US10/071,917 Abandoned US20020089953A1 (en) | 2000-12-07 | 2002-02-08 | Simple block space time transmit diversity using multiple spreading codes |
US10/071,903 Abandoned US20020093927A1 (en) | 2000-12-07 | 2002-02-08 | Simple block space time transmit diversity using multiple spreading codes |
US10/077,565 Abandoned US20020075832A1 (en) | 2000-12-07 | 2002-02-15 | Simple block space time transmit diversity using multiple spreading codes |
US10/077,076 Abandoned US20020089955A1 (en) | 2000-12-07 | 2002-02-15 | Simple block space time transmit diversity using multiple spreading codes |
US10/079,107 Abandoned US20020080746A1 (en) | 2000-12-07 | 2002-02-20 | Simple block space time transmit diversity using multiple spreading codes |
US10/107,465 Abandoned US20020097699A1 (en) | 2000-12-07 | 2002-03-27 | Transmit diversity using multiple spreading codes |
US12/627,630 Expired - Lifetime US8311492B2 (en) | 2000-12-07 | 2009-11-30 | Simple block space time transmit diversity using multiple spreading codes |
US13/647,042 Abandoned US20130044734A1 (en) | 2000-12-07 | 2012-10-08 | Simple block space time transmit diversity using multiple spreading codes |
US14/692,415 Abandoned US20150229349A1 (en) | 2000-12-07 | 2015-04-21 | Simple block space time transmit diversity using multiple spreading codes |
Family Applications After (9)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/071,917 Abandoned US20020089953A1 (en) | 2000-12-07 | 2002-02-08 | Simple block space time transmit diversity using multiple spreading codes |
US10/071,903 Abandoned US20020093927A1 (en) | 2000-12-07 | 2002-02-08 | Simple block space time transmit diversity using multiple spreading codes |
US10/077,565 Abandoned US20020075832A1 (en) | 2000-12-07 | 2002-02-15 | Simple block space time transmit diversity using multiple spreading codes |
US10/077,076 Abandoned US20020089955A1 (en) | 2000-12-07 | 2002-02-15 | Simple block space time transmit diversity using multiple spreading codes |
US10/079,107 Abandoned US20020080746A1 (en) | 2000-12-07 | 2002-02-20 | Simple block space time transmit diversity using multiple spreading codes |
US10/107,465 Abandoned US20020097699A1 (en) | 2000-12-07 | 2002-03-27 | Transmit diversity using multiple spreading codes |
US12/627,630 Expired - Lifetime US8311492B2 (en) | 2000-12-07 | 2009-11-30 | Simple block space time transmit diversity using multiple spreading codes |
US13/647,042 Abandoned US20130044734A1 (en) | 2000-12-07 | 2012-10-08 | Simple block space time transmit diversity using multiple spreading codes |
US14/692,415 Abandoned US20150229349A1 (en) | 2000-12-07 | 2015-04-21 | Simple block space time transmit diversity using multiple spreading codes |
Country Status (15)
Country | Link |
---|---|
US (10) | US20020110108A1 (ja) |
EP (4) | EP2086147B9 (ja) |
JP (7) | JP2004524727A (ja) |
KR (8) | KR100811020B1 (ja) |
CN (2) | CN1278507C (ja) |
AT (2) | ATE281723T1 (ja) |
AU (1) | AU2002227241A1 (ja) |
CA (3) | CA2776357A1 (ja) |
DE (2) | DE60139160D1 (ja) |
DK (3) | DK1463227T3 (ja) |
ES (3) | ES2501915T3 (ja) |
HK (3) | HK1064535A1 (ja) |
MX (1) | MXPA03005080A (ja) |
NO (2) | NO329514B1 (ja) |
WO (1) | WO2002047278A2 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030112775A1 (en) * | 2001-12-14 | 2003-06-19 | Molnar Karl James | Method and apparatus for two-user joint demodulation in a system having transmit deversity |
US20040208234A1 (en) * | 2002-05-22 | 2004-10-21 | Katsuyoshi Naka | Communication terminal device and spread code estimation method |
US20080080638A1 (en) * | 2006-09-29 | 2008-04-03 | Analog Devices, Inc. | Method and apparatus for joint detection |
CN100499443C (zh) * | 2002-10-07 | 2009-06-10 | 皇家飞利浦电子股份有限公司 | Cofdm发射机分集系统最佳译码的简化实施 |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020110108A1 (en) * | 2000-12-07 | 2002-08-15 | Younglok Kim | Simple block space time transmit diversity using multiple spreading codes |
EP1650892A1 (en) * | 2000-12-13 | 2006-04-26 | Interdigital Technology Corporation | Modified block space time transmit diversity decoder |
US7095731B2 (en) | 2000-12-13 | 2006-08-22 | Interdigital Technology Corporation | Modified block space time transmit diversity encoder |
JPWO2002100000A1 (ja) * | 2001-06-04 | 2004-09-24 | 三菱電機株式会社 | Cdma送信ダイバーシチ装置 |
WO2003023996A1 (en) * | 2001-09-12 | 2003-03-20 | Infineon Technologies Ag | Cdma wireless systems |
EP1505757B1 (en) | 2003-08-05 | 2008-07-09 | STMicroelectronics S.r.l. | Signal transmission method using antenna diversity and corresponding apparatus |
US20050175074A1 (en) * | 2004-02-11 | 2005-08-11 | Interdigital Technology Corporation | Wireless communication method and apparatus for performing multi-user detection using reduced length channel impulse responses |
CN100488069C (zh) * | 2005-05-27 | 2009-05-13 | 展讯通信(上海)有限公司 | 一种td-scdma系统中联合小区检测方法 |
US7995641B2 (en) * | 2007-11-06 | 2011-08-09 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for code power parameter estimation for received signal processing |
KR101571566B1 (ko) | 2008-08-11 | 2015-11-25 | 엘지전자 주식회사 | 무선 통신 시스템에서 제어신호 전송 방법 |
KR20100019947A (ko) | 2008-08-11 | 2010-02-19 | 엘지전자 주식회사 | 무선 통신 시스템에서 정보 전송 방법 |
KR101597573B1 (ko) | 2008-08-11 | 2016-02-25 | 엘지전자 주식회사 | 제어정보의 상향링크 전송 방법 |
KR101603338B1 (ko) | 2008-08-11 | 2016-03-15 | 엘지전자 주식회사 | 무선 통신 시스템에서 정보 전송 방법 및 장치 |
KR101646249B1 (ko) | 2008-08-11 | 2016-08-16 | 엘지전자 주식회사 | 무선 통신 시스템에서 정보 전송 방법 및 장치 |
KR101225920B1 (ko) | 2008-11-14 | 2013-01-24 | 엘지전자 주식회사 | 무선 통신 시스템에서 정보 전송 방법 및 장치 |
CN104218985B (zh) | 2008-11-14 | 2017-12-08 | Lg电子株式会社 | 用于在无线通信系统中发送信号的方法和装置 |
US8737502B2 (en) | 2009-02-09 | 2014-05-27 | Qualcomm Incorporated | Multiplexing and coding schemes for multiple transmit antennas in a wireless communication system |
KR20100091876A (ko) | 2009-02-11 | 2010-08-19 | 엘지전자 주식회사 | 다중안테나 전송을 위한 단말 동작 |
CN101667893B (zh) * | 2009-09-29 | 2013-01-09 | 中国民航大学 | 基于块空时分组编码的虚拟多输入多输出中继传输方法 |
US8543872B2 (en) * | 2011-01-24 | 2013-09-24 | Infineon Technologies Ag | Detecting and eliminating potential performance degradation caused by neighboring identical scrambling codes |
WO2016076768A1 (en) * | 2014-11-11 | 2016-05-19 | Telefonaktiebolaget L M Ericsson (Publ) | Transmitting node, receiving node and methods performed therein |
EP4342571A1 (en) | 2021-06-24 | 2024-03-27 | JFE Steel Corporation | Gas separation facility and gas separation method |
US20230093484A1 (en) * | 2021-09-23 | 2023-03-23 | Apple Inc. | Systems and methods for de-correlating coded signals in dual port transmissions |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5652764A (en) * | 1995-01-17 | 1997-07-29 | Kabushiki Kaisha Toshiba | Radio communication system |
US6115406A (en) * | 1999-09-10 | 2000-09-05 | Interdigital Technology Corporation | Transmission using an antenna array in a CDMA communication system |
US20020090038A1 (en) * | 1998-10-07 | 2002-07-11 | Dabak Anand G. | Space time block coded transmit antenna diversity for WCDMA |
US20020181430A1 (en) * | 2001-04-26 | 2002-12-05 | Joseph Thomas | Space-time transmit diversity scheme for time-dispersive propagation media |
US20030021352A1 (en) * | 2001-07-30 | 2003-01-30 | Benning Roger David | Space time spreading and phase sweep transmit diversity |
US20030067993A1 (en) * | 2001-09-18 | 2003-04-10 | Harish Viswanathan | Open-loop diversity technique for systems employing multi-transmitter antennas |
US6564645B1 (en) * | 1999-09-27 | 2003-05-20 | Toyoda Koki Kabushiki Kaisha | Pressure sensor constructed by joining two housings with ring-like metal plate interposed therebetween |
US6594473B1 (en) * | 1999-05-28 | 2003-07-15 | Texas Instruments Incorporated | Wireless system with transmitter having multiple transmit antennas and combining open loop and closed loop transmit diversities |
US6628702B1 (en) * | 2000-06-14 | 2003-09-30 | Qualcomm, Incorporated | Method and apparatus for demodulating signals processed in a transmit diversity mode |
US6721300B1 (en) * | 2000-03-22 | 2004-04-13 | Matsushita Electric Industrial Co., Ltd | STTD encoding method and diversity transmitter |
US6775260B1 (en) * | 1999-02-25 | 2004-08-10 | Texas Instruments Incorporated | Space time transmit diversity for TDD/WCDMA systems |
US6788661B1 (en) * | 1999-11-12 | 2004-09-07 | Nikia Networks Oy | Adaptive beam-time coding method and apparatus |
US7020175B2 (en) * | 2000-09-21 | 2006-03-28 | Motorola, Inc. | MMSE reception of DS-CDMA with transmit diversity |
Family Cites Families (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US656528A (en) * | 1898-05-27 | 1900-08-21 | Eugene Donard | Process of removing solvent vapors from wool. |
US720175A (en) * | 1900-09-27 | 1903-02-10 | James M Dougherty | Bottle-capping machine. |
GB9112898D0 (en) * | 1991-06-14 | 1991-07-31 | Digital Equipment Int | Communication networks |
TW226003B (ja) * | 1992-11-13 | 1994-07-01 | Toyo Kagaku Kk | |
EP1133074B1 (en) | 1995-07-19 | 2009-04-22 | Nec Corporation | CDMA diversity transmission system |
US6134215A (en) | 1996-04-02 | 2000-10-17 | Qualcomm Incorpoated | Using orthogonal waveforms to enable multiple transmitters to share a single CDM channel |
US6038263A (en) | 1997-07-31 | 2000-03-14 | Motorola, Inc. | Method and apparatus for transmitting signals in a communication system |
DE19733336A1 (de) * | 1997-08-01 | 1999-02-18 | Siemens Ag | Verfahren und Funkstation zur Datenübertragung |
US6185258B1 (en) * | 1997-09-16 | 2001-02-06 | At&T Wireless Services Inc. | Transmitter diversity technique for wireless communications |
CN1047047C (zh) | 1997-10-05 | 1999-12-01 | 北京信威通信技术有限公司 | 同步码分多址通信链路的建立和保持方法 |
DE69832589T2 (de) * | 1998-05-15 | 2006-08-10 | Sony Deutschland Gmbh | Sender und Übertragungsverfahren, die die Flexibilität der Zuordnung von Koden erhöhen |
DE69934951T2 (de) * | 1998-10-07 | 2007-10-25 | Texas Instruments Inc., Dallas | Kanalschätzung in Raum-Zeit blockkodierter Sendeantennendiversität für WCDMA |
US6154485A (en) * | 1998-10-19 | 2000-11-28 | Motorola, Inc. | Receiver in a wireless communications system for receiving signals having combined orthogonal transmit diversity and adaptive array techniques |
EP0996234B1 (en) * | 1998-10-23 | 2006-06-28 | Sony Deutschland GmbH | Receiver architecture for a multi scrambling code transmission CDMA technique |
FI108588B (fi) * | 1998-12-15 | 2002-02-15 | Nokia Corp | Menetelmä ja radiojärjestelmä digitaalisen signaalin siirtoon |
US6452916B1 (en) | 1999-01-04 | 2002-09-17 | Lucent Technologies Inc. | Space-time spreading method of CDMA wireless communication |
US6728302B1 (en) * | 1999-02-12 | 2004-04-27 | Texas Instruments Incorporated | STTD encoding for PCCPCH |
US6317411B1 (en) * | 1999-02-22 | 2001-11-13 | Motorola, Inc. | Method and system for transmitting and receiving signals transmitted from an antenna array with transmit diversity techniques |
US6862275B1 (en) * | 1999-02-26 | 2005-03-01 | Texas Instruments Incorporated | Cell selection with STTD and SSDT |
JP2000261412A (ja) | 1999-03-06 | 2000-09-22 | Matsushita Electric Ind Co Ltd | 干渉信号除去装置 |
US6804311B1 (en) * | 1999-04-08 | 2004-10-12 | Texas Instruments Incorporated | Diversity detection for WCDMA |
US6356528B1 (en) | 1999-04-15 | 2002-03-12 | Qualcomm Incorporated | Interleaver and deinterleaver for use in a diversity transmission communication system |
EP1069707A1 (en) | 1999-07-13 | 2001-01-17 | Motorola, Inc. | Transmit diversity transmitter and receiver for radio communications systems |
US6917597B1 (en) * | 1999-07-30 | 2005-07-12 | Texas Instruments Incorporated | System and method of communication using transmit antenna diversity based upon uplink measurement for the TDD mode of WCDMA |
US7254171B2 (en) * | 2000-01-20 | 2007-08-07 | Nortel Networks Limited | Equaliser for digital communications systems and method of equalisation |
US6804307B1 (en) * | 2000-01-27 | 2004-10-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for efficient transmit diversity using complex space-time block codes |
US6865237B1 (en) * | 2000-02-22 | 2005-03-08 | Nokia Mobile Phones Limited | Method and system for digital signal transmission |
US7139324B1 (en) * | 2000-06-02 | 2006-11-21 | Nokia Networks Oy | Closed loop feedback system for improved down link performance |
US7154958B2 (en) * | 2000-07-05 | 2006-12-26 | Texas Instruments Incorporated | Code division multiple access wireless system with time reversed space time block transmitter diversity |
KR100374323B1 (ko) * | 2000-08-10 | 2003-03-03 | 최종수 | 로젯 주사 영상을 위한 클러스터링 방법 |
KR100401201B1 (ko) * | 2000-10-06 | 2003-10-10 | 삼성전자주식회사 | 협대역 시분할 듀플렉싱 부호분할다중접속이동통신시스템에서 1차공통제어 물리채널의 전송다이버시티 사용 여부 결정장치 및 방법 |
US20020110108A1 (en) * | 2000-12-07 | 2002-08-15 | Younglok Kim | Simple block space time transmit diversity using multiple spreading codes |
US6748024B2 (en) * | 2001-03-28 | 2004-06-08 | Nokia Corporation | Non-zero complex weighted space-time code for multiple antenna transmission |
US7031419B2 (en) * | 2001-06-29 | 2006-04-18 | Nokia Corporation | Data transmission method and system |
US7430191B2 (en) * | 2001-09-10 | 2008-09-30 | Qualcomm Incorporated | Method and apparatus for performing frequency tracking based on diversity transmitted pilots in a CDMA communication system |
US7085295B2 (en) * | 2001-10-04 | 2006-08-01 | Qualcomm Incorporated | Method and apparatus for searching for pilots over code space in a CDMA communication system |
-
2001
- 2001-11-15 US US09/999,287 patent/US20020110108A1/en not_active Abandoned
- 2001-12-05 KR KR1020037013883A patent/KR100811020B1/ko not_active IP Right Cessation
- 2001-12-05 CN CNB01820127XA patent/CN1278507C/zh not_active Expired - Lifetime
- 2001-12-05 DK DK04015676T patent/DK1463227T3/da active
- 2001-12-05 WO PCT/US2001/046603 patent/WO2002047278A2/en active IP Right Grant
- 2001-12-05 CA CA2776357A patent/CA2776357A1/en not_active Abandoned
- 2001-12-05 AT AT01996123T patent/ATE281723T1/de not_active IP Right Cessation
- 2001-12-05 KR KR1020087006474A patent/KR100887276B1/ko not_active IP Right Cessation
- 2001-12-05 DE DE60139160T patent/DE60139160D1/de not_active Expired - Lifetime
- 2001-12-05 KR KR10-2003-7007513A patent/KR100532821B1/ko not_active IP Right Cessation
- 2001-12-05 KR KR1020097006552A patent/KR101025842B1/ko active IP Right Grant
- 2001-12-05 EP EP09006756.2A patent/EP2086147B9/en not_active Expired - Lifetime
- 2001-12-05 KR KR1020097019709A patent/KR101013926B1/ko not_active IP Right Cessation
- 2001-12-05 AT AT04015676T patent/ATE435535T1/de not_active IP Right Cessation
- 2001-12-05 ES ES09006756.2T patent/ES2501915T3/es not_active Expired - Lifetime
- 2001-12-05 DK DK09006756.2T patent/DK2086147T3/da active
- 2001-12-05 DK DK01996123T patent/DK1340334T3/da active
- 2001-12-05 ES ES01996123T patent/ES2230393T3/es not_active Expired - Lifetime
- 2001-12-05 ES ES04015676T patent/ES2329677T3/es not_active Expired - Lifetime
- 2001-12-05 CN CN200610131763A patent/CN100596048C/zh not_active Expired - Lifetime
- 2001-12-05 EP EP04015676A patent/EP1463227B1/en not_active Expired - Lifetime
- 2001-12-05 CA CA002430720A patent/CA2430720C/en not_active Expired - Fee Related
- 2001-12-05 JP JP2002548883A patent/JP2004524727A/ja active Pending
- 2001-12-05 EP EP14171776.9A patent/EP2779507A1/en not_active Withdrawn
- 2001-12-05 MX MXPA03005080A patent/MXPA03005080A/es active IP Right Grant
- 2001-12-05 AU AU2002227241A patent/AU2002227241A1/en not_active Abandoned
- 2001-12-05 EP EP01996123A patent/EP1340334B1/en not_active Expired - Lifetime
- 2001-12-05 KR KR1020087024873A patent/KR100972585B1/ko active IP Right Grant
- 2001-12-05 KR KR1020107008057A patent/KR20100053690A/ko not_active Application Discontinuation
- 2001-12-05 KR KR1020077021548A patent/KR100860806B1/ko not_active IP Right Cessation
- 2001-12-05 DE DE60106970T patent/DE60106970T2/de not_active Expired - Lifetime
- 2001-12-05 CA CA2635909A patent/CA2635909C/en not_active Expired - Fee Related
-
2002
- 2002-02-08 US US10/071,917 patent/US20020089953A1/en not_active Abandoned
- 2002-02-08 US US10/071,903 patent/US20020093927A1/en not_active Abandoned
- 2002-02-15 US US10/077,565 patent/US20020075832A1/en not_active Abandoned
- 2002-02-15 US US10/077,076 patent/US20020089955A1/en not_active Abandoned
- 2002-02-20 US US10/079,107 patent/US20020080746A1/en not_active Abandoned
- 2002-03-27 US US10/107,465 patent/US20020097699A1/en not_active Abandoned
-
2003
- 2003-05-28 NO NO20032435A patent/NO329514B1/no not_active IP Right Cessation
-
2004
- 2004-09-13 HK HK04106943A patent/HK1064535A1/xx not_active IP Right Cessation
-
2005
- 2005-03-18 JP JP2005080007A patent/JP2005253095A/ja active Pending
-
2007
- 2007-10-18 HK HK07111332.7A patent/HK1109260A1/xx not_active IP Right Cessation
-
2009
- 2009-11-30 US US12/627,630 patent/US8311492B2/en not_active Expired - Lifetime
-
2010
- 2010-03-01 JP JP2010043951A patent/JP5066587B2/ja not_active Expired - Fee Related
- 2010-03-18 NO NO20100401A patent/NO20100401L/no not_active Application Discontinuation
-
2011
- 2011-11-01 JP JP2011240094A patent/JP5575725B2/ja not_active Expired - Fee Related
-
2012
- 2012-10-08 US US13/647,042 patent/US20130044734A1/en not_active Abandoned
-
2013
- 2013-11-22 JP JP2013242005A patent/JP5934170B2/ja not_active Expired - Fee Related
-
2015
- 2015-02-04 HK HK15101225.8A patent/HK1200992A1/xx unknown
- 2015-03-31 JP JP2015072571A patent/JP6220807B2/ja not_active Expired - Lifetime
- 2015-04-21 US US14/692,415 patent/US20150229349A1/en not_active Abandoned
-
2016
- 2016-10-05 JP JP2016197266A patent/JP2017046353A/ja not_active Withdrawn
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5652764A (en) * | 1995-01-17 | 1997-07-29 | Kabushiki Kaisha Toshiba | Radio communication system |
US20020090038A1 (en) * | 1998-10-07 | 2002-07-11 | Dabak Anand G. | Space time block coded transmit antenna diversity for WCDMA |
US6775260B1 (en) * | 1999-02-25 | 2004-08-10 | Texas Instruments Incorporated | Space time transmit diversity for TDD/WCDMA systems |
US6594473B1 (en) * | 1999-05-28 | 2003-07-15 | Texas Instruments Incorporated | Wireless system with transmitter having multiple transmit antennas and combining open loop and closed loop transmit diversities |
US6115406A (en) * | 1999-09-10 | 2000-09-05 | Interdigital Technology Corporation | Transmission using an antenna array in a CDMA communication system |
US6564645B1 (en) * | 1999-09-27 | 2003-05-20 | Toyoda Koki Kabushiki Kaisha | Pressure sensor constructed by joining two housings with ring-like metal plate interposed therebetween |
US6788661B1 (en) * | 1999-11-12 | 2004-09-07 | Nikia Networks Oy | Adaptive beam-time coding method and apparatus |
US6721300B1 (en) * | 2000-03-22 | 2004-04-13 | Matsushita Electric Industrial Co., Ltd | STTD encoding method and diversity transmitter |
US6628702B1 (en) * | 2000-06-14 | 2003-09-30 | Qualcomm, Incorporated | Method and apparatus for demodulating signals processed in a transmit diversity mode |
US7020175B2 (en) * | 2000-09-21 | 2006-03-28 | Motorola, Inc. | MMSE reception of DS-CDMA with transmit diversity |
US20020181430A1 (en) * | 2001-04-26 | 2002-12-05 | Joseph Thomas | Space-time transmit diversity scheme for time-dispersive propagation media |
US20030021352A1 (en) * | 2001-07-30 | 2003-01-30 | Benning Roger David | Space time spreading and phase sweep transmit diversity |
US20030067993A1 (en) * | 2001-09-18 | 2003-04-10 | Harish Viswanathan | Open-loop diversity technique for systems employing multi-transmitter antennas |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030112775A1 (en) * | 2001-12-14 | 2003-06-19 | Molnar Karl James | Method and apparatus for two-user joint demodulation in a system having transmit deversity |
WO2003052957A1 (en) * | 2001-12-14 | 2003-06-26 | Ericsson, Inc. | Method and apparatus for two-user joint demodulation in a system having transmit diversity |
US7085332B2 (en) | 2001-12-14 | 2006-08-01 | Ericsson, Inc. | Method and apparatus for two-user joint demodulation in a system having transmit diversity |
US20040208234A1 (en) * | 2002-05-22 | 2004-10-21 | Katsuyoshi Naka | Communication terminal device and spread code estimation method |
CN100499443C (zh) * | 2002-10-07 | 2009-06-10 | 皇家飞利浦电子股份有限公司 | Cofdm发射机分集系统最佳译码的简化实施 |
US20080080638A1 (en) * | 2006-09-29 | 2008-04-03 | Analog Devices, Inc. | Method and apparatus for joint detection |
US7916841B2 (en) * | 2006-09-29 | 2011-03-29 | Mediatek Inc. | Method and apparatus for joint detection |
Also Published As
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8311492B2 (en) | Simple block space time transmit diversity using multiple spreading codes | |
JP2008172814A (ja) | 改変ブロック空間時間送信ダイバーシティ符号化装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: INTERDIGITAL TECHNOLOGY CORPORATION, DELAWARE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIM, YOUNGLOK;ZEIRA, ARIELA;REEL/FRAME:012647/0720 Effective date: 20011108 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- AFTER EXAMINER'S ANSWER OR BOARD OF APPEALS DECISION |