WO2003071712A1 - Appareil de reception et procede de reception - Google Patents
Appareil de reception et procede de reception Download PDFInfo
- Publication number
- WO2003071712A1 WO2003071712A1 PCT/JP2003/001753 JP0301753W WO03071712A1 WO 2003071712 A1 WO2003071712 A1 WO 2003071712A1 JP 0301753 W JP0301753 W JP 0301753W WO 03071712 A1 WO03071712 A1 WO 03071712A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- decoding
- received signal
- space
- unit
- direct wave
- Prior art date
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Classifications
-
- 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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0047—Decoding adapted to other signal detection operation
- H04L1/005—Iterative decoding, including iteration between signal detection and decoding operation
-
- 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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
- H04L1/0042—Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape
-
- 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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
-
- 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
- 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
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
- H04L2025/03375—Passband transmission
-
- 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
- H04L25/03006—Arrangements for removing intersymbol interference
Definitions
- the present invention relates to a receiving device and a receiving method.
- STC Space-Time Coding: Space-Time Coding
- a receiving apparatus that receives a signal transmitted using STC performs channel estimation for a corresponding propagation path for each pair of a transmitting antenna and a receiving antenna using pilot symbols included in the received signal, and estimates the estimated channel characteristics. Based on the information bit and the no ,. The information bit is extracted by decoding the received signal on which the parity bit is superimposed.
- each coded symbol transmitted from multiple transmit antennas undergoes different fading, thereby achieving the effect of diversity.
- Forecasts of received signal points may approach or overlap due to instantaneous fusing correlation. In this case, there is a problem that the decoding characteristics are degraded. In particular, when the number of signals to be superimposed increases due to multipath, etc., the received signal point candidates may approach or overlap Increase the likelihood. Disclosure of the invention
- An object of the present invention is to obtain good decoding characteristics even in a multipath environment or a multiuser environment.
- the subject of the present invention is that in STC (Space-Time Coding: space-time coding) combining coding and transmission diversity, equalization is performed to remove a delayed wave component of a received signal using the result of error correction decoding, and so on. It is to improve the decoding characteristics by repeating the process of performing error correction decoding on the direct wave component obtained by the conversion.
- STC Space-Time Coding: space-time coding
- the receiving device includes: an obtaining unit that obtains a direct wave component from a space-time error-correction-encoded received signal; and a decoding unit that performs space-time error correction decoding of the obtained direct wave component.
- the acquisition unit acquires a direct wave component of the received signal using a decoding result of the decoding unit, and the decoding unit adopts a configuration in which space-time error correction decoding is performed every time a direct wave component is acquired.
- a receiving method comprises: a first obtaining step of obtaining a direct wave component from a space-time error-correction-coded received signal; and a direct wave component obtaining in the first obtaining step.
- a second decoding step of performing space-time error correction decoding on the obtained direct wave component is performed by the first decoding step.
- FIG. 1 is a block diagram illustrating a main configuration of a receiving apparatus according to Embodiment 1 of the present invention
- FIG. 2 is a flowchart illustrating an operation of the receiving apparatus according to Embodiment 1
- FIG. 4 is a block diagram illustrating a main configuration of a receiving apparatus according to Embodiment 2 of the present invention.
- FIG. 4 is a flowchart illustrating an operation of the receiving apparatus according to Embodiment 2.
- FIG. 5 is a block diagram showing a main configuration of a receiving apparatus according to Embodiment 3 of the present invention
- FIG. 6 is a flowchart for explaining the operation of the receiving apparatus according to Embodiment 3
- FIG. Diagram for explaining a specific example of the operation of the receiving apparatus according to Embodiment 3, and
- FIG. 8 is a block diagram showing a main configuration of a transmitting apparatus and a receiving apparatus according to Embodiment 4 of the present invention.
- FIG. 1 is a block diagram showing a main configuration of a receiving apparatus according to Embodiment 1 of the present invention.
- the receiving apparatus shown in the figure simultaneously receives a plurality of series of signals transmitted using the STC. That is, for example, the transmission data is turbo-coded at the transmission source to form a plurality of sequence signals, the respective sequence signals are interleaved, the respective sequence signals are transmitted from the corresponding transmission antennas, and these multiple sequence signals are superimposed. And received by the receiving device. Further, in the following description, decoding of a signal subjected to space-time turbo encoding as described above is referred to as space-time turbo decoding.
- radio receiving section 110 performs predetermined radio processing (for example, A / D conversion and down-conversion) on a reception signal received via antenna 100.
- Channel estimation section 120 performs channel estimation on the propagation path of the received signal.
- the equalizer 130 generates a replica of the received signal, performs equalization, and removes a delayed wave component from the received signal.
- the channel dinterleaver 140 dinterleaves the direct wave component of the received signal obtained by the equalizer 130.
- Space-time turbo decoder 150 performs space-time turbo decoding of the received signal.
- the data determination unit 160 makes a hard decision on the soft output likelihood from the space-time turbo decoder 150 to obtain a space-time turbo decoding result.
- the channel interleaver 1700 interleaves the space-time turbo decoding result, and Output to the fixed section 120 and the equalizer 130.
- the channel characteristics are determined by the channel estimating unit 120 using only the pilot symbols. It is estimated (ST100). Then, a replica of the received signal is generated by the equalizer 130 based on the channel estimation result, and a delayed wave component is removed from the received signal, thereby performing an equalization process (ST 110 0 ), Direct wave components are obtained. Then, the obtained direct wave component is interleaved by the channel dinterleaver 140 so that the sequence of the interleaved data at the transmission source is restored, and spatio-temporally turbo-decoded by the spatio-temporal turbo decoder 150 (ST 1 2 0 0). The soft decision value obtained by the space-time turbo decoding is hard-decided by the data decision unit 160, and a space-time turbo decoding result (provisional decision result) is obtained (ST1300).
- predetermined radio processing for example, AZD conversion and down-conversion
- the space-time turbo decoding result temporary decision result
- it is determined whether or not to terminate the repetition of the processing by an error check or the like using a redundant bit (ST1400).
- the turbo decoding result becomes an official data determination result (ST1500), and the process ends.
- the space-time turbo decoding result is output to channel interleaver 170, and the same interleaving as the interleaving at the source is performed on the space-time turbo decoding result by channel interleaver 170. Is done.
- the interleaved space-time turbo decoding result is output to channel estimation section 120 and equalizer 130, and channel estimation is performed again including data symbols based on the space-time turbo decoding result (ST 16 0 0).
- the space-time turbo decoding result is used for channel estimation, the accuracy of channel estimation is higher than when only PiT symbols included in the received signal are used.
- the replica of the received signal is generated by the equalizer 130 based on the newly obtained channel estimation result, and the received signal and the received signal A direct wave component is obtained by performing equalization processing using Jamaica, the obtained channel estimation result, and the space-time turbo decoding result (ST1700).
- the direct wave component obtained here uses a more accurate channel estimation result and a received signal decoding result than the previous equalization processing, so it is closer to the signal transmitted from the transmission source. It has become something. Thereafter, space-time turbo decoding is performed on the obtained direct wave component again, and the process of equalization and space-time turbo decoding is repeated to obtain a highly accurate decoding result.
- channel estimation and equalization processing are repeatedly performed using the decoding result of error correction decoding by space-time turbo decoding. Good decoding characteristics can be obtained even below.
- FIG. 3 is a block diagram showing a main configuration of a receiving apparatus according to Embodiment 2 of the present invention.
- the same parts as those of the receiving apparatus shown in FIG. similarly to Embodiment 1, the receiving apparatus shown in the figure simultaneously receives a plurality of series of signals transmitted using STC. That is, for example, transmission data is turbo-coded at a transmission source to become a plurality of sequences of signals, the signals of each sequence are interleaved, and the signals of each sequence are transmitted from a corresponding transmission antenna. It is assumed that a received signal on which a series signal is superimposed is received.
- the feature of this embodiment is that the reliability of the decoding result of each symbol is ranked for the space-time turbo decoding result (temporary decision result) by the data decision unit 160, and only the symbol ranked higher is repeated for channel estimation. And the point used for equalization processing.
- the ranking unit 200 ranks the reliability of the decoding result for each symbol included in the space-time turbo decoding result (provisional determination result) for each symbol.
- the ranking unit 200 uses a criterion for determining the reliability of the decryption result as Then, ranking is performed using, for example, the symbol likelihood and the power value of each symbol.
- channel estimating section 120 outputs the highest-ranked symbol out of the decoding results interleaved by channel interleaver 170 and the port included in the received signal. Estimate the channel using the dot symbol.
- the equalizer 130 performs an equalization process using the received signal, the channel estimation result, and the symbols ranked higher.
- channel characteristics are estimated from a received signal on which predetermined radio processing has been performed, and equalization processing is performed. Then, the direct wave component obtained by performing the equalization process is interleaved, subjected to space-time turbo decoding, and a space-time turbo decoding result (tentative determination result) is obtained.
- the space-time turbo decoding result (provisional decision result)
- the data is determined, and the process ends.
- the correctness of decoding of each symbol included in the space-time turbo decoding result is ranked by ranking section 200 (ST 20000). Then, the ranked space-time turbo decoding result is subjected to the same interleaving as the interleaving at the transmission source by the channel interleaver 170.
- the interleaved space-time turbo decoding result is output to channel estimation section 120 and equalizer 130, and the symbol ranked higher by ranking section 200 and the pilot symbols included in the received signal are output.
- channel estimation is performed again (ST2100).
- only the symbols ranked higher in the space-time turbo decoding result that is, symbols that have been decoded more correctly, are used for channel estimation, and decoding is not so correct. Since symbols are not used for channel estimation, the accuracy of channel estimation is higher than in Embodiment 1.
- a replica of the received signal is generated by the equalizer 130 based on the newly obtained channel estimation result, and the received signal, the replica of the received signal, the obtained channel estimation result, and the top are ranked.
- the direct wave component is obtained by performing the equalization processing using the symbols thus obtained (ST2200).
- a more accurate channel estimation result and a spatio-temporal turbo decoding result of the received signal are used as compared with the previous equalization processing, and the spatio-temporal turbo decoding result is compared with the first embodiment. Since only the symbol whose decoding correctness is ranked higher is used, the obtained direct wave component is closer to the signal transmitted from the transmission source. Thereafter, space-time turbo decoding is performed on the obtained direct wave component again, and by repeating the equalization and space-time turbo decoding processes, a highly accurate decoding result can be obtained.
- channel estimation and equalization are performed by using only symbols whose decoding correctness is ranked higher among decoding results obtained by error correction decoding by space-time turbo decoding. Since the processing is repeated, better decoding characteristics can be obtained even in a multipath environment or a multiuser environment.
- FIG. 5 is a block diagram showing a main configuration of a receiving apparatus according to Embodiment 3 of the present invention.
- the same parts as those of the receiving apparatus shown in FIG. similarly to Embodiment 1, the receiving apparatus shown in the figure simultaneously receives a plurality of series of signals transmitted using STC. That is, for example, transmission data is turbo-coded at a transmission source to become a plurality of sequences of signals, the signals of each sequence are interleaved, and the signals of each sequence are transmitted from a corresponding transmission antenna. It is assumed that the sequence signal is superimposed and received by the receiving device.
- the feature of this embodiment is that the space-time turbo decoding result is The point is that the signals are separated into similar sequences, the noise components extracted from the received signal are added to the separated encoded symbols of each sequence, and the signals of each sequence are turbo-decoded.
- a noise extraction circuit 300 extracts a noise component from a difference between a received signal received by the wireless reception unit 110 and a replica generated from a data determination result.
- the turbo decoder 310 performs turbo decoding on a signal obtained by adding noise to each encoded symbol separated by the tentative determination in the data determination unit 160.
- Data decision section 320 makes a hard decision on turbo-decoded data and obtains a turbo-decoding result.
- channel characteristics are estimated from a received signal on which predetermined radio processing has been performed, and equalization processing is performed. Then, the direct wave component obtained by performing the equalization processing is dentered, space-time turbo decoded, and a space-time turbo decoding result (temporary determination result) is obtained.
- the space-time turbo decoding result provisional decision result
- the signal is output, and the same interleaving as interleaving at the transmission source is performed on the result of space-time turbo decoding by a channel interleaver 170, and the channel estimation, equalization processing, and space-time processing are performed as in the first embodiment. Turbo decoding is repeated.
- the space-time turbo decoding process When the space-time turbo decoding process is completed after the specified number of repetitions has been reached, an error check using redundant bits is performed (ST 30000), and if no error is detected, final data determination is performed (ST 3 00). 6 00) The decoding process ends. If an error is detected, the noise extraction circuit 300 creates a replica of the composite received signal from the temporary judgment result of space-time turbo decoding and the line characteristics, and extracts the noise component from the difference between the replied power and the received signal. (ST 3100). Then, the space-time turbo decoding process (2) The noise extracted by the circuit for noise extraction (2) is added to the coded symbols separated into a plurality of streams in the same manner as the transmission data (ST320).
- turbo-decoding result (tentative decision result) is obtained (ST340).
- turbo decoding result temporary decision result
- whether or not to repeat the decoding process is determined by an error check or the like using redundant bits (ST3500)
- the data decoding unit 320 makes a hard decision on the decoded turbo decoding result (ST 3600), becomes an official data decision result, and ends the processing.
- the turbo decoding result is output to channel interleaver 170, and the same interleaving as the interleaving at the transmission source is performed on channel decoding result by channel Gregg interleaver 170.
- channel estimation and equalization processing are performed, and space-time turbo decoding is performed again.
- FIG. 7 is a diagram showing an example of a received signal point candidate arrangement on the IQ plane when BPSK is transmitted from three transmitting antennas.
- black points indicate received signal point candidates
- vectors indicate received signals.
- the received signal point candidates 4100 and 420 are close to each other, for example, when a received symbol having a phase and an amplitude like the received signal 400 is subjected to space-time turbo decoding. However, errors may remain even when the space-time turbo decoding is repeated as described above.
- the decoding accuracy is improved by performing turbo decoding on the coded symbols of each sequence that has been space-time turbo decoded and separated into a plurality of sequences. Improve the degree.
- a signal after space-time turbo decoding is separated into a plurality of sequences in the same manner as transmission data at a transmission source, and a noise component is added to a coded symbol of each separated sequence. Since addition is performed and turbo decoding is performed again for each sequence of coded symbols, errors remaining after space-time turbo decoding can be corrected, and better decoding characteristics can be obtained even in a multipath environment or a multiuser environment. Can be obtained.
- FIG. 8 is a block diagram showing a main configuration of transmitting apparatus 500 and receiving apparatus 600 according to Embodiment 4 of the present invention.
- the same parts as those of the receiving apparatus shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
- a feature of the present embodiment is that a known signal phase and amplitude variation pattern different for each of a plurality of transmitting antennas are superimposed at the time of signal transmission in a transmitting device, and the receiving device has the same signal phase as that added in the transmitting device. The point is that channel estimation is performed using the fluctuation pattern of the amplitude and the characteristics of the actual propagation path. In the following description, a known signal phase and amplitude fluctuation pattern is called pseudo-fading.
- a transmitting apparatus 500 includes a space-time turbo encoder 510, a channel interleaver 520, a pseudo-fading generating section 530, and transmitting antennas 540a to 540d.
- the space-time turbo encoder 5110 performs space-time turbo coding on transmission data, performs turbo coding, and generates signals of a plurality of sequences (here, four sequences).
- Channel interleaver 520 interleaves a plurality of (four) sequences of signals.
- the pseudo fading generation section 530 generates pseudo fading to be added to signals of a plurality of sequences (four sequences).
- the transmission antennas 540a to d transmit signals of multiple sequences (four sequences) to which pseudo fading is added.
- the pseudo fading generation unit 6100 The same pseudo-fading as that generated by the phasing generator 530 is generated.
- the transmission data is space-time turbo-coded by the space-time turbo encoder 5110 to generate a plurality of sequences (four sequences) of signals.
- the signals of a plurality of sequences (four sequences) are interleaved by the channel interleaver 520 for each sequence.
- the pseudo fading generation section 530 generates pseudo fading to be added to each signal of a plurality of sequences (four sequences).
- the pseudo-fading generated has a relatively fast time variation.
- pseudo-fencing is added to the multiple-sequence (four-sequence) signals output from the channel interleaver 520, and the signals are transmitted almost simultaneously from the corresponding transmitting antennas 540a to d.
- signals of a plurality of sequences are received by antenna 100, and channel characteristics are estimated from the received signals on which predetermined radio processing has been performed, as in the first embodiment.
- the pseudo-fading generation unit 6100 generates the same pseudo-fading as that generated by the pseudo-fading generation unit 5300, and the channel estimation unit 120 generates the pseudo-fading and the actual propagation path.
- the channel is estimated using the characteristics of
- the equalization processing, the dint-leaving, and the space-time turbo decoding are repeatedly performed, and a highly accurate decoding result is obtained.
- reception signal point candidate arrangement shown in FIG. 7 when the reception signal point candidate arrangement shown in FIG. 7 occurs, in a low-speed fading environment where the fading fluctuation is slow, the time during which the reception signal point candidates 410 and 420 approach each other becomes longer. At this time, when a signal having an amplitude and a phase such as the received signal 400 is received, there is a high possibility that the space-time turbo decoder 150 will not perform appropriate decoding, and the decoding characteristics deteriorate. On the other hand, in the present embodiment, such a reception signal point arrangement can be eliminated in a short time by pseudo-phosing. Can be.
- the received signal received by receiving apparatus 600 is provided with a time variation speed and pseudo-fading added to transmitting apparatus 500, so that the fading correlation of the actual propagation path is And pseudo-fading is also known in the receiving apparatus 600, so that it is possible to prevent decoding from deteriorating without deteriorating the accuracy of channel estimation.
- the transmitting apparatus adds the fluctuating speed and the pseudo fading to each signal of a plurality of sequences, and generates the same pseudo fading in the receiving apparatus.
- channel estimation is performed using the generated pseudo-fading and real channel characteristics, good decoding characteristics can be obtained even in a low-speed fading environment.
- the transmitting apparatus does not always need to add pseudo fading to each signal of a plurality of streams.
- the transmitter reduces pseudo-fading during low-speed fading by adding pseudo-fading only when transmitting a data signal, but not when transmitting a pilot signal.
- the receiving apparatus receives the pilot signal and estimates the channel characteristics of the actual propagation path.
- the receiving apparatus estimates the channel by using the channel estimation result of the actual propagation path and the known pseudo-fading to obtain the link. It is possible to prevent the estimation accuracy from deteriorating.
- the present invention can be applied to a receiving device and a receiving method.
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03705302A EP1480351A1 (en) | 2002-02-25 | 2003-02-19 | Receiving apparatus and receiving method |
AU2003211475A AU2003211475A1 (en) | 2002-02-25 | 2003-02-19 | Receiving apparatus and receiving method |
US10/475,302 US20040161058A1 (en) | 2002-02-25 | 2003-02-19 | Receiving apparatus and receiving method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002047545A JP2003249918A (ja) | 2002-02-25 | 2002-02-25 | 受信装置および受信方法 |
JP2002-47545 | 2002-02-25 |
Publications (1)
Publication Number | Publication Date |
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WO2003071712A1 true WO2003071712A1 (fr) | 2003-08-28 |
Family
ID=27750700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/001753 WO2003071712A1 (fr) | 2002-02-25 | 2003-02-19 | Appareil de reception et procede de reception |
Country Status (6)
Country | Link |
---|---|
US (1) | US20040161058A1 (ja) |
EP (1) | EP1480351A1 (ja) |
JP (1) | JP2003249918A (ja) |
CN (1) | CN1511388A (ja) |
AU (1) | AU2003211475A1 (ja) |
WO (1) | WO2003071712A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4224329B2 (ja) * | 2003-03-25 | 2009-02-12 | パナソニック株式会社 | 符号化装置および符号化方法 |
US20050141657A1 (en) * | 2003-12-30 | 2005-06-30 | Maltsev Alexander A. | Adaptive channel equalizer for wireless system |
US7706481B2 (en) | 2004-08-20 | 2010-04-27 | Broadcom Corporation | Method and system for improving reception in wired and wireless receivers through redundancy and iterative processing |
CN100433836C (zh) * | 2004-08-20 | 2008-11-12 | 美国博通公司 | 使用冗余对视/音频和语音数据进行解码的方法和系统 |
FR2877527A1 (fr) * | 2004-11-04 | 2006-05-05 | France Telecom | Procede de reception iteratif pour systeme de type mimo, recepteur et programme d'ordinateur correspondants |
JP2009188640A (ja) * | 2008-02-05 | 2009-08-20 | Sharp Corp | 実行判断装置、受信装置、無線通信システム、及び実行判断方法 |
JP6723424B1 (ja) * | 2019-06-21 | 2020-07-15 | 株式会社横須賀テレコムリサーチパーク | 送受信方法および送受信システム |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH08195703A (ja) * | 1995-01-17 | 1996-07-30 | Toshiba Corp | 無線通信装置 |
WO1997041970A1 (de) * | 1996-05-07 | 1997-11-13 | Rqm Raum-Quanten-Motoren Ag | Vorrichtung und verfahren zur erzeugung elektromagnetischer pulse |
JP2000091986A (ja) * | 1998-09-17 | 2000-03-31 | Matsushita Electric Ind Co Ltd | 無線伝送システムおよび送信電力制御方法 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5305353A (en) * | 1992-05-29 | 1994-04-19 | At&T Bell Laboratories | Method and apparatus for providing time diversity |
EP2280494A3 (en) * | 1996-04-26 | 2011-12-07 | AT & T Corp. | Method and apparatus for data transmission using multiple transmit antennas |
US6404828B2 (en) * | 1997-03-12 | 2002-06-11 | Interdigital Technology Corporation | Multichannel decoder |
JPH10336144A (ja) * | 1997-05-29 | 1998-12-18 | Matsushita Electric Ind Co Ltd | 符号分割多元接続移動体通信装置 |
EP1033004A1 (en) * | 1998-09-18 | 2000-09-06 | Hughes Electronics Corporation | Method and constructions for space-time codes for psk constellations for spatial diversity in multiple-element antenna systems |
US6891897B1 (en) * | 1999-07-23 | 2005-05-10 | Nortel Networks Limited | Space-time coding and channel estimation scheme, arrangement and method |
FI113721B (fi) * | 1999-12-15 | 2004-05-31 | Nokia Corp | Menetelmä ja vastaanotin kanavaestimaatin iteratiiviseksi parantamiseksi |
US7236536B2 (en) * | 2001-07-26 | 2007-06-26 | Lucent Technologies Inc. | Method and apparatus for detection and decoding of signals received from a linear propagation channel |
US7095812B2 (en) * | 2002-06-24 | 2006-08-22 | Agere Systems Inc. | Reduced complexity receiver for space-time- bit-interleaved coded modulation |
-
2002
- 2002-02-25 JP JP2002047545A patent/JP2003249918A/ja active Pending
-
2003
- 2003-02-19 US US10/475,302 patent/US20040161058A1/en not_active Abandoned
- 2003-02-19 CN CNA038003147A patent/CN1511388A/zh active Pending
- 2003-02-19 WO PCT/JP2003/001753 patent/WO2003071712A1/ja not_active Application Discontinuation
- 2003-02-19 AU AU2003211475A patent/AU2003211475A1/en not_active Abandoned
- 2003-02-19 EP EP03705302A patent/EP1480351A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08195703A (ja) * | 1995-01-17 | 1996-07-30 | Toshiba Corp | 無線通信装置 |
WO1997041970A1 (de) * | 1996-05-07 | 1997-11-13 | Rqm Raum-Quanten-Motoren Ag | Vorrichtung und verfahren zur erzeugung elektromagnetischer pulse |
JP2000091986A (ja) * | 1998-09-17 | 2000-03-31 | Matsushita Electric Ind Co Ltd | 無線伝送システムおよび送信電力制御方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2003249918A (ja) | 2003-09-05 |
EP1480351A1 (en) | 2004-11-24 |
AU2003211475A1 (en) | 2003-09-09 |
CN1511388A (zh) | 2004-07-07 |
US20040161058A1 (en) | 2004-08-19 |
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