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公开(公告)号：DE60033916T2
公开(公告)日：2007-07-05
申请号：DE60033916
申请日：2000-02-04
Applicant: MOTOROLA INC
Inventor： WHINNETT NICHOLAS WILLIAM , CLOP OSCAR , BOIXADERA FRANCESC , KUCHI KIRAN KUMAR , ROHANI FT WORTH
IPC: H04B7/06
Abstract: In a method for wireless data communication between a base station and a subscriber unit in a wireless communication system, groups of symbols of an input data stream are commutated to produce a plurality of commutated data streams. The plurality of commutated data streams are then transformed to produce a plurality of transformed data streams. Next, each transformed data stream is spread with a selected one of a plurality of spreading codes to produce a plurality of antenna signals. Finally, each of the plurality of antenna signals is transmitted using a selected one of a plurality of spaced apart antennas, wherein the plurality of spaced apart antennas are spaced apart to provide transmit diversity. In one embodiment, the transform is a space-time transform.
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公开(公告)号：AT357088T
公开(公告)日：2007-04-15
申请号：AT00907169
申请日：2000-02-04
Applicant: MOTOROLA INC
Inventor： WHINNETT NICHOLAS WILLIAM , CLOP OSCAR , BOIXADERA FRANCESC , KUCHI KIRAN KUMAR , ROHANI KAMYAR
IPC: H04B7/06
Abstract: In a method for wireless data communication between a base station and a subscriber unit in a wireless communication system, groups of symbols of an input data stream are commutated to produce a plurality of commutated data streams. The plurality of commutated data streams are then transformed to produce a plurality of transformed data streams. Next, each transformed data stream is spread with a selected one of a plurality of spreading codes to produce a plurality of antenna signals. Finally, each of the plurality of antenna signals is transmitted using a selected one of a plurality of spaced apart antennas, wherein the plurality of spaced apart antennas are spaced apart to provide transmit diversity. In one embodiment, the transform is a space-time transform.
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公开(公告)号：DE69900645T2
公开(公告)日：2002-09-12
申请号：DE69900645
申请日：1999-05-26
Applicant: MOTOROLA INC
Inventor： CLOP OSCAR , FARMINE YANN , WHINNETT NICOLAS
Abstract: A base station (1) in a radio communication system is provided with an antenna array 2, 3 for communication with a plurality of mobile stations (4, 5). The transmissions of the base station (1) are optimised by adjusting the phase between the signals transmitted by each antenna (2, 3) so that the product of the propagation channel estimates is maximised. The invention has particular application to CDMA-TDD modes of operation where it has been shown to perform favourably in comparison with known transmit diversity techniques. A further advantage is that it does not require added complexity in the channel estimation at each mobile station (4, 5).
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公开(公告)号：AU6432900A
公开(公告)日：2001-01-30
申请号：AU6432900
申请日：2000-07-05
Applicant: MOTOROLA INC
Inventor： CLOP OSCAR , BOIXADERA FRANCESC , MAX FRANCISCO
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公开(公告)号：DE60033916D1
公开(公告)日：2007-04-26
申请号：DE60033916
申请日：2000-02-04
Applicant: MOTOROLA INC
Inventor： WHINNETT NICHOLAS WILLIAM , CLOP OSCAR , BOIXADERA FRANCESC , KUCHI KIRAN KUMAR , ROHANI FT WORTH
IPC: H04B7/06
Abstract: In a method for wireless data communication between a base station and a subscriber unit in a wireless communication system, groups of symbols of an input data stream are commutated to produce a plurality of commutated data streams. The plurality of commutated data streams are then transformed to produce a plurality of transformed data streams. Next, each transformed data stream is spread with a selected one of a plurality of spreading codes to produce a plurality of antenna signals. Finally, each of the plurality of antenna signals is transmitted using a selected one of a plurality of spaced apart antennas, wherein the plurality of spaced apart antennas are spaced apart to provide transmit diversity. In one embodiment, the transform is a space-time transform.
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Patent Agency Ranking
公开(公告)号：DE69900645D1
公开(公告)日：2002-01-31
申请号：DE69900645
申请日：1999-05-26
Applicant: MOTOROLA INC
Inventor： CLOP OSCAR , FARMINE YANN , WHINNETT NICOLAS
Abstract: A base station (1) in a radio communication system is provided with an antenna array 2, 3 for communication with a plurality of mobile stations (4, 5). The transmissions of the base station (1) are optimised by adjusting the phase between the signals transmitted by each antenna (2, 3) so that the product of the propagation channel estimates is maximised. The invention has particular application to CDMA-TDD modes of operation where it has been shown to perform favourably in comparison with known transmit diversity techniques. A further advantage is that it does not require added complexity in the channel estimation at each mobile station (4, 5).
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公开(公告)号：AT211334T
公开(公告)日：2002-01-15
申请号：AT99401258
申请日：1999-05-26
Applicant: MOTOROLA INC
Inventor： CLOP OSCAR , FARMINE YANN , WHINNETT NICOLAS
Abstract: A base station (1) in a radio communication system is provided with an antenna array 2, 3 for communication with a plurality of mobile stations (4, 5). The transmissions of the base station (1) are optimised by adjusting the phase between the signals transmitted by each antenna (2, 3) so that the product of the propagation channel estimates is maximised. The invention has particular application to CDMA-TDD modes of operation where it has been shown to perform favourably in comparison with known transmit diversity techniques. A further advantage is that it does not require added complexity in the channel estimation at each mobile station (4, 5).
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公开(公告)号：CA2379122A1
公开(公告)日：2001-01-18
申请号：CA2379122
申请日：2000-07-05
Applicant: MOTOROLA INC
Inventor： BOIXADERA FRANCESC , MAX FRANCISCO , CLOP OSCAR
Abstract: A space time transmit diversity scheme using two antennas (9, 10) in which a data block of symbols (D22) is transmitted simultaneously with a complex conjugate of another block (D21*). With suitable receiver (15) processing, t he symbols can be recovered with only a small complexity increase. The inventio n has a particular application to CDMA systems operating in TDD mode.
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公开(公告)号：AU2871000A
公开(公告)日：2000-09-14
申请号：AU2871000
申请日：2000-02-04
Applicant: MOTOROLA INC
Inventor： WHINNETT NICHOLAS WILLIAM , CLOP OSCAR , BOIXADERA FRANCESC , KUCHI KIRAN KUMAR , ROHANI KAMYAR
IPC: H04B7/06
Abstract: In a method for wireless data communication between a base station and a subscriber unit in a wireless communication system, groups of symbols of an input data stream are commutated to produce a plurality of commutated data streams. The plurality of commutated data streams are then transformed to produce a plurality of transformed data streams. Next, each transformed data stream is spread with a selected one of a plurality of spreading codes to produce a plurality of antenna signals. Finally, each of the plurality of antenna signals is transmitted using a selected one of a plurality of spaced apart antennas, wherein the plurality of spaced apart antennas are spaced apart to provide transmit diversity. In one embodiment, the transform is a space-time transform.
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公开(公告)号：EP1157483A4
公开(公告)日：2004-03-03
申请号：EP00907169
申请日：2000-02-04
Applicant: MOTOROLA INC
Inventor： WHINNETT NICHOLAS WILLIAM , CLOP OSCAR , BOIXADERA FRANCESC , KUCHI KIRAN KUMAR , ROHANI KAMYAR
IPC: H04B7/06
CPC classification number: H04B7/0604 , H04B7/0669 , H04B7/0678 , H04L1/0618
Abstract: In a method for wireless data communication between a transmitter and a receiver in a wireless communication system, groups of symbols of an input data stream are commutated (24) to produce a plurality of commutated data streams. The plurality of commutated data streams are then transformed to produce a plurality of transformed data streams. Next, each transformed data stream is spread (26, 28) with a selected one of a plurality of spreading codes to produce a plurality of antenna signals. Finally, each of the plurality of antenna signals is transmitted using a selected one of a plurality of spaced apart antennas (34, 36), wherein the plurality of spaced apart antennas (34, 36) are spaced apart to provide transmit diversity. In one embodiment, the transform is a space-time transform.
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