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公开(公告)号：JP2000151483A
公开(公告)日：2000-05-30
申请号：JP31475899
申请日：1999-11-05
Applicant: LUCENT TECHNOLOGIES INC
Inventor： RASHID-FARROKHI FARROKH , VALENZUELA REINALDO A
IPC: H04B7/02 , H04B1/7115 , H04B1/712 , H04B7/08 , H04B7/216
Abstract: PROBLEM TO BE SOLVED: To improve the performance of a receiver for code division multiple access system by forming a system of a coupler receiving outputs from the respective rake receiver fingers of reception modules, permitting the coupler to couple the outputs of the rake receiver fingers and to generate synthesis output. SOLUTION: Respective desplitters 158 contain one of chip multipliers 159 connected to one of integrators 161. Respective antennas 151 receive radio signals sent to them. Respective down converters 153 down-convert the radio signals which the respective associated antennas among the antennas receive. A base band signal which one of the down converters 153 generates is supplied to respective receiver fingers 155 in the associated modules of a reception module 152. All the L rake receiver fingers 155 of the respective receiver modules 152 are connected to a coupling device 165.
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2.发明专利
公开(公告)号：JP2002124899A
公开(公告)日：2002-04-26
申请号：JP2001247662
申请日：2001-08-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LOZANO ANGEL , RASHID-FARROKHI FARROKH , VALENZUELA REINALDO A
Abstract: PROBLEM TO BE SOLVED: To provide a spatiotemporal processor corresponding to a radio system equipped with a plurality of transmission and reception antennas, in which even when the correlation of a certain level to be used in a multi-input multi-output(MIMO) system exists, it is possible to develop (generate) signals capable of achieving the maximum open loop capacity by channels having the correlation of the level, since the signals have the correlation of a certain level, and performance deterioration and the capacity reduction is generated when the correlation of those signals is ignored. SOLUTION: Even when the correlation of a certain level to be used in a radio system having a plurality of transmission antennas and reception antennas exists, it is possible to develop (generate) signals capable of achieving the maximum open loop capacity by channels having the correlation. In this principle, signals to be transmitted by various antennas are processed so that the maximum information carrying capabilities can be improved. That is, data to be transmitted are divided into (M+1) pieces of sub-streams. One connected signal constituted of one common weighted version of the sub-streams and one corresponding weighted version to be frequently supplied to the antennas of the sub-streams is supplied to the respective transmission antennas, and M pieces of transmission signals are allowed to exist as a whole. A receiver equipped with N pieces of antennas receive the M pieces of transmission signals connected by the channels, and reconstitute the original data from those transmission signals. This is achieved by using a series of decoding processes.
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公开(公告)号：JP2001237751A
公开(公告)日：2001-08-31
申请号：JP2001003612
申请日：2001-01-11
Applicant: LUCENT TECHNOLOGIES INC
Abstract: PROBLEM TO BE SOLVED: To provide a method and a device which can process signals to be transmitted from various antenna, for improving the capability of a receiver that extracts these transmitting signals from the received signals, regardless of some correlations in a MIMO system. SOLUTION: The number of bit streams to be transmitted simultaneously is adjusted and decreased, according to the correlation level, and at the same time plural versions of every bit stream weighted in various ways are transmitted at the same time. These weighted versions are coupled together for generating a single-coupled weighting signal. A receiver processes the received signals, as through all signals arrived at a receiving antenna with no correlation. A weight vector can be decided with a forward channel transmitter, by making use of the channel characteristic of a forward link that is notified to a transmitter of a forward link when the channel characteristic is transmitted from a receiver of a forward link via a transmitter of a reverse link.
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公开(公告)号：JP2000151484A
公开(公告)日：2000-05-30
申请号：JP31472499
申请日：1999-11-05
Applicant: LUCENT TECHNOLOGIES INC
Inventor： RASHID-FARROKHI FARROKH , VALENZUELA REINALDO A
Abstract: PROBLEM TO BE SOLVED: To provide a space-time diversity for increasing the capacity of a radio system by constituting the diversity of a stage for deciding an operation parameter which a base station uses for almost simultaneously controlling respective transmission beam patterns, or the like. SOLUTION: A radio transmitter for user 101, which is used in a base station, and a radio receiver 103 used in a radio terminal are contained. The radio transmitter 101 includes antennas 105 including an antenna 105-1 to 105-K. The respective antennas 105 receive the supply of signals from respective associated transmission modules 107. The respective transmission modules 107 contain P-pieces of diversity modules 109, a coupling device 111 and an up converter 119. Then, an operation parameter which the base station uses is decided for simultaneously controlling respective transmission beam patterns formed for establishing a radio channel between the base station and the respective radio terminals as the function of received channel information.
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公开(公告)号：BRPI0100011B1
公开(公告)日：2015-12-29
申请号：BR0100011
申请日：2001-01-04
Applicant: LUCENT TECHNOLOGIES INC
Abstract: processamento em espaço-tempo para sistemas sem fio de multi-entrada e multi-saída em um sistema mimo os sinais transmitidos das várias antenas são processados de modo a melhorar a capacidade do receptor extraí-los do sinal recebido mesmo em face de alguma correlação. mais especificamente, o número de fluxos de bits que são transmitidos simultaneamente é ajustado, por exemplo, reduzido, dependendo do nível de correlação, enquanto versões múltiplas de cada fluxo de bits, ponderadas variadamente, são transmitidas simultaneamente. as versões ponderadas variadamente são combinadas para produzir um sinal ponderado combinado. o receptor processa os sinais recebidos da mesma maneira que ele faria se todos os sinais que atingem as antenas de recepção não tivessem correlação. os vetores de ponderação podem ser determinados pelo transmissor de canal de encaminhamento utilizando as propriedades de canal do enlace de encaminhamento que são tornadas conhecidas do transmissor do enlace de encaminhamento ao serem transmitidas do receptor do enlace de encaminhamento pelo transmissor do enlace inverso ou os vetores de ponderação podem ser determinados pelo transmissor do canal de encaminhamento utilizando as propriedades de canal do enlace de encaminhamento e os vetores de ponderação determinados são tornados conhecidos do transmissor do enlace de encaminhamento ao serem transmitidos do receptor do enlace de encaminhamento pelo transmissor do enlace inverso. as propriedades de canal utilizadas para determinar os vetores de ponderação podem incluir a resposta de canal do transmissor para o receptor e a matriz de covariança de ruído e interferência mensurada no receptor.
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Patent Agency Ranking
公开(公告)号：BR0100011A
公开(公告)日：2001-08-28
申请号：BR0100011
申请日：2001-01-04
Applicant: LUCENT TECHNOLOGIES INC
Abstract: In a MIMO system the signals transmitted from the various antennas are processed so as to improve the ability of the receiver to extract them from the received signal even in the face of some correlation. More specifically the number of bit streams that is transmitted simultaneously is adjusted, e.g., reduced, depending on the level of correlation, while multiple versions of each bit stream, variously weighted, are transmitted simultaneously. The variously weighted versions are combined to produced one combined weighted signal. The receiver processes the received signals in the same manner as it would have had all the signals reaching the receive antennas been uncorrelated. The weight vectors may be determined by the forward channel transmitter using the channel properties of the forward link which are made known to the transmitter of the forward link by being transmitted from the receiver of the forward link by the transmitter of the reverse link or the weight vectors may be determined by the forward channel transmitter using the channel properties of the forward link and the determined weight vectors are made known to the transmitter of the forward link by being transmitted from the receiver of the forward link by the transmitter of the reverse link. The channel properties used to determine the weight vectors may include the channel response from the transmitter to the receiver and the covariance matrix of noise and interference measured at the receiver.
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公开(公告)号：CA2350878C
公开(公告)日：2005-01-04
申请号：CA2350878
申请日：2001-06-19
Applicant: LUCENT TECHNOLOGIES INC
Inventor： RASHID-FARROKHI FARROKH , LOZANO ANGEL , VALENZUELA REINALDO A
Abstract: Signals are developed for use in a wireless system with multiple transmit a nd multiple receive antennas so that even in the face of some correlation the most open-loop capacity that can be achieved using a substantially open-loop system with a channel of that level of correlation is obtained. In accordance with the principles of the invention, the signals transmitted from the various antennas are processed so as to improve their ability to convey the maximum amount of information. More specifically, the data to be transmitted is divided into M+1 substreams, where M is the number of transmi t antennas. Each transmit antenna is supplied with a combination signal that is made up of a weighted version of a common one of the substreams and a weighted version of a respective one of the substreams that is supplied uniquely for that antenna, so that there are M transmit signals. A receiver having N antennas receives the M transmit signals as combined by the channel and reconstitutes the original data therefrom. This may be achieved using successive decoding techniques. Advantageously, the capacity, i.e., the rate of information that can be conveyed with an arbitrarily small probabili ty of error when the instantaneous forward channel condition is unknown to the transmitter, is maximized.
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公开(公告)号：AU5715899A
公开(公告)日：2000-05-11
申请号：AU5715899
申请日：1999-10-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： RASHID-FARROKHI FARROKH , VALENZUELA REINALDO A
IPC: H04B7/02 , H04B1/7115 , H04B1/712 , H04B7/08 , H04B7/216
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公开(公告)号：CA2327611A1
公开(公告)日：2001-07-13
申请号：CA2327611
申请日：2000-12-05
Applicant: LUCENT TECHNOLOGIES INC
Abstract: In a MIMO system the signals transmitted from the various antennas are processed so as to improve the ability of the receiver to extract them from the received signal even in the face of some correlation. More specifically the number of bit streams that is transmitted simultaneously is adjusted, e.g., reduced, depending on the level of correlation, while multiple versions of each bit stream, variously weighted, are transmitted simultaneously. The variously weighted versions are combined to produced one combined weighted signal. The receiver processes the received signals in the same manner as it would have had all the signals reaching the receive antennas be en uncorrelated. The weight vectors may be determined by the forward channel transmitter using the channel properties of the forward link which are made known to the transmitter of the forward link by being transmitted from the receiver of the forward li nk by the transmitter of the reverse link or the weight vectors may be determined by t he forward channel transmitter using the channel properties of the forward link and the determined weight vectors are made known to the transmitter of the forward link by bein g transmitted from the receiver of the forward link by the transmitter of the reverse link . The channel properties used to determine the weight vectors may include the channel response from the transmitter to the receiver and the covariance matrix of noise and interference measured at the receiver.
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公开(公告)号：DE60039099D1
公开(公告)日：2008-07-17
申请号：DE60039099
申请日：2000-12-12
Applicant: LUCENT TECHNOLOGIES INC
Abstract: In a MIMO system the signals transmitted from the various antennas are processed so as to improve the ability of the receiver to extract them from the received signal even in the face of some correlation. More specifically the number of bit streams that is transmitted simultaneously is adjusted, e.g., reduced, depending on the level of correlation, while multiple versions of each bit stream, variously weighted, are transmitted simultaneously. The variously weighted versions are combined to produced one combined weighted signal. The receiver processes the received signals in the same manner as it would have had all the signals reaching the receive antennas been uncorrelated. The weight vectors may be determined by the forward channel transmitter using the channel properties of the forward link which are made known to the transmitter of the forward link by being transmitted from the receiver of the forward link by the transmitter of the reverse link or the weight vectors may be determined by the forward channel transmitter using the channel properties of the forward link and the determined weight vectors are made known to the transmitter of the forward link by being transmitted from the receiver of the forward link by the transmitter of the reverse link. The channel properties used to determine the weight vectors may include the channel response from the transmitter to the receiver and the covariance matrix of noise and interference measured at the receiver.
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