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公开(公告)号：JPH10155181A
公开(公告)日：1998-06-09
申请号：JP30115097
申请日：1997-10-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： AVIDOR DAN , KASTURIA SANJAY , SIZER THEODORE II , VALENZUELA REINALDO A , WRIGHT GREGORY ALAN
IPC: H04J3/00 , H04J3/16 , H04W16/10 , H04W16/28 , H04W84/14 , H04Q7/36 , H04Q7/22 , H04Q7/24 , H04Q7/26 , H04Q7/30
Abstract: PROBLEM TO BE SOLVED: To avoid deterioration in quality of an active speech and channel interruption by providing a multi-beam antenna whose direction is controllable to a base station in a time division multiplex permanent radio loop system and controlling a plurality of transmission and reception beams changed timewise and assignment of time slots in cross reference with each other and allowing the base station to make communication with a single terminal equipment in the assigned time slot. SOLUTION: A cell controller 25 based on information of a database 45 gives the instruction of configuring an antenna pattern to realize an optimum signal to interruption signal ratio to a transmission beam shape device 40a. The database 45 as information relating to an interference level between all possible channels in a cell and a possible channel in an adjacent cell and the information is updated by measuring signal strength periodically. A transmission frequency and a reception frequency are slightly different and a reception beam with an antenna pattern with a optimum signal to interference signal ratio is formed similarly.
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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：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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公开(公告)号：JPH10155180A
公开(公告)日：1998-06-09
申请号：JP30110297
申请日：1997-10-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： AVIDOR DAN , KASTURIA SANJAY , SIZER THEODORE II , VALENZUELA REINALDO A , WRIGHT GREGORY ALAN
IPC: H04J3/16 , H01Q1/24 , H01Q3/26 , H04B7/00 , H04W16/14 , H04W16/28 , H04W24/00 , H04W72/08 , H04W76/02 , H04W84/14 , H04Q7/36
Abstract: PROBLEM TO BE SOLVED: To reduce the possibility of reject by assigning at least to timewise communication slots to a terminal equipment making a request in the case that possibility of interference caused by a communication link or interference received by the communication link is low. SOLUTION: A cell controller 25 receives a service request via a control channel. A cell controller 25 retrieves a proper up-link time slot for a terminal equipment. In the case that the proper up-link time slot is found out, the cell controller 25 retrieves a proper down-link time slot for the terminal equipment. In the case that the cell controller 25 cannot find out proper up and down link slots, the service request is rejected. When the cell controller 25 finds out the proper up and down link slots, they are assigned to the terminal equipment. The cell controller 25 informs the new link to cell controllers of other adjacent cells.
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5.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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Patent Agency Ranking
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：JP2000138652A
公开(公告)日：2000-05-16
申请号：JP23191699
申请日：1999-08-18
Applicant: LUCENT TECHNOLOGIES INC
Inventor： GITLIN RICHARD DENNIS , HUANG HOWARD C , MAILAENDER LAURENCE EUGENE , VALENZUELA REINALDO A
Abstract: PROBLEM TO BE SOLVED: To efficiently increase a system capacity by identifying a high-rate user and reducing the influence of interference only for the high-rate user. SOLUTION: A receiver 400 efficiently gets back a capacity occupied by n-number of high power users by combining an antenna array algorithm 430 and a multi-user detecting algorithm 420. Signals from k-number of users in all are received by antennas 410 to 411. Among the k-number of users, n-number of (k>n) users are the high-rate users and the other (k-n) users are low-rate users. An antenna array algorithm 430, a multi-user detecting algorithm 420 or both of them are applied to only the high-rate users. Namely, concerning the algorithm 430, only ones corresponding to the high-rate user among θ1 to θn are made null and concerning a multi user detecting algorithm 420, only ones corresponding to the high-rate user among signature sequences s1 to sn are utilized.
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公开(公告)号：JPH10190569A
公开(公告)日：1998-07-21
申请号：JP30111797
申请日：1997-10-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： AVIDOR DAN , KASTURIA SANJAY , SIZER THEODORE II , VALENZUELA REINALDO A , WRIGHT GREGORY ALAN
Abstract: PROBLEM TO BE SOLVED: To reduce interference from other transmitters and other receivers by calculating an optimum weight vector for optimizing the signal-to-total- interference-signal ratio of an antenna beam based on data relating to mutual interference level. SOLUTION: The weight vector for optimizing the signal-to-total-interference- signal ratio (S/TI) in antenna output is generated, based on the data relating to the mutual interference level. Then, the optimum weight vector is stored and used in the same time slot in a later frame. Then, the S/TI is calculated, supplied to a cell controller 25 and finally supplied to the other cell controller inside a cluster as well. Simultaneously, a beam formation electronics forms a beam. The signals received by the K pieces of radiation antenna elements are multiplied with the corresponding components of the weight vector by a multiplier 42, the total sum is obtained and a radiation pattern for optimizing the S/TI in the antenna output is generated.
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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：BR9903622A
公开(公告)日：2000-09-05
申请号：BR9903622
申请日：1999-08-12
Applicant: LUCENT TECHNOLOGIES INC
Inventor： GITLIN RICHARD DENNIS , MAILAENDER LAWRENCE EUGENE , VALENZUELA REINALDO A , HUANG HOWARD C
Abstract: A method and apparatus for increasing system capacity in a mixed-rate wireless communication are disclosed. Improvements are obtained using multiuser detection or antenna array processing techniques or both to explicitly cancel or attenuate only the high power users. Multiuser detection may be combined with antenna array processing to recover capacity appropriated by the high-power users. By mitigating the interference effects of only the high-powered users, the computational burden is manageable. An antenna array algorithm or a multiuser detection algorithm or both, are applied only to n high rate users (n
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