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公开(公告)号：JP2000069570A
公开(公告)日：2000-03-03
申请号：JP16623699
申请日：1999-06-14
Applicant: MOTOROLA INC
Inventor： BOIXADERA ESPAX F , FARMINE YANN , WHINNETT NICHOLAS
Abstract: PROBLEM TO BE SOLVED: To provide the improvement method for a capacity in a duplicate scheme. SOLUTION: A duplicate scheme has a 1st frequency band and a 2nd frequency band. This method consists of steps (steps 402, 404, 410) that decide a capacity available for the 1st frequency band, a step where feedback data with a variable quantity corresponding to the capacity available on the 1st frequency band are transmitted and the feedback data consist of data to enhance the communication quality on the 2nd frequency band, and steps (steps 406, 408, 412, 414) where the transmission on the 2nd frequency band is optimized by using the feedback data when the data are available.
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公开(公告)号：JP2000269869A
公开(公告)日：2000-09-29
申请号：JP2000055145
申请日：2000-03-01
Applicant: MOTOROLA INC
Inventor： BOIXADERA ESPAX F , FARMINE YANN , WHINNETT NICHOLAS
Abstract: PROBLEM TO BE SOLVED: To obtain a communication system that uses an antenna array. SOLUTION: A 2nd communication unit generates an antenna weighting for the transmission path between two communication units 1, 2 and feeds it back to the 1st communication unit that has antenna arrays 4, 5, 6. This method is especially applicable to a multiple carrier system like an OFDM system. Only the weighting to a subcarrier that is identified as to have been received with comparatively poor signal quality is calculated, and the result is fed back to the 1st communication unit so as to minimize a request of additional expenses.
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公开(公告)号：DE69837471T2
公开(公告)日：2007-08-16
申请号：DE69837471
申请日：1998-06-15
Applicant: MOTOROLA INC
Inventor： BOIXADERA ESPAX FRANCESC , FARMINE YANN , WHINNETT NICHOLAS
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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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Patent Agency Ranking
公开(公告)号：CA2300449C
公开(公告)日：2008-04-08
申请号：CA2300449
申请日：2000-03-10
Applicant: MOTOROLA INC
Inventor： FARMINE YANN , WHINNETT NICHOLAS , BOIXADERA ESPAX FRANCESC
Abstract: Antenna weights for a transmit path (3) between two communication devices (1, 2), the first device (1) having an antenna array (4, 5, 6) are generated in the second device (2) and fed back to weighting circuitry (9, 10, 11, 12) in the first device (1). The invention is particularly applicable to multicarrier systems such as OFDM systems. Only weights for those sub--carriers identified as being received with comparatively poor signal quality are calculated and fed back to the first device (1), thus limiting the additional overhead requirements to a minimum.
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公开(公告)号：DE69912734D1
公开(公告)日：2003-12-18
申请号：DE69912734
申请日：1999-03-12
Applicant: MOTOROLA INC
Inventor： BOIXADERA ESPAX FRANCESC , FARMINE YANN , WHINNETT NICHOLAS
Abstract: Antenna weights for a transmit path (3) between two communication devices (1, 2), the first device (1) having an antenna array (4, 5, 6) are generated in the second device (2) and fed hack to weighting circuitry (9, 10, 11, 12) in the first device (1). The invention is particularly applicable to multicarrier systems such as OFDM systems. Only weights for those sub-carriers identified as being received with comparatively poor signal quality are calculated and fed back to the first device (1), thus limiting the additional overhead requirements to a minimum.
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公开(公告)号：AT358924T
公开(公告)日：2007-04-15
申请号：AT98401461
申请日：1998-06-15
Applicant: MOTOROLA INC
Inventor： BOIXADERA ESPAX FRANCESC , FARMINE YANN , WHINNETT NICHOLAS
Abstract: A method of improving capacity in a duplexing scheme is provided. The duplexing scheme has a first band of frequencies and a second band of frequencies. The method comprises the steps of: determining an amount of available capacity on the first band of frequencies (steps 402, 404, 410), transmitting, on the first band of frequencies, a variable amount of feedback data corresponding to the amount of available capacity on the first band of frequencies, the feedback data comprising data for improving the quality of communications on the second band of frequencies, and optimising (steps 406, 408, 412, 414) transmissions on the second band of frequencies using, when available, the feedback data.
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公开(公告)号：DE69823986T2
公开(公告)日：2005-05-25
申请号：DE69823986
申请日：1998-07-15
Applicant: MOTOROLA INC
Inventor： BOIXADERA ESPAX FRANCESC , FARMINE YANN , WHINNETT NICHOLAS
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公开(公告)号：DE69912734T2
公开(公告)日：2004-05-27
申请号：DE69912734
申请日：1999-03-12
Applicant: MOTOROLA INC
Inventor： BOIXADERA ESPAX FRANCESC , FARMINE YANN , WHINNETT NICHOLAS
Abstract: Antenna weights for a transmit path (3) between two communication devices (1, 2), the first device (1) having an antenna array (4, 5, 6) are generated in the second device (2) and fed hack to weighting circuitry (9, 10, 11, 12) in the first device (1). The invention is particularly applicable to multicarrier systems such as OFDM systems. Only weights for those sub-carriers identified as being received with comparatively poor signal quality are calculated and fed back to the first device (1), thus limiting the additional overhead requirements to a minimum.
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