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    31.
    发明专利
    未知

    公开(公告)号：AT271284T

    公开(公告)日：2004-07-15

    申请号：AT01301958

    申请日：2001-03-05

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： LOZANO ANGEL ,  RASHID-FARROKH FARROKHI ,  VALENZUELA REINALDO A

    IPC: H04J3/00 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08

    Abstract: Signals are developed for use in a wireless system with multiple transmit and 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 transmit 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 probability of error when the instantaneous forward channel condition is unknown to the transmitter, is maximized.

    Space-time processing for multiple-input, multiple-output, wireless systems
    34.
    发明专利
    Space-time processing for multiple-input, multiple-output, wireless systems 未知

    公开(公告)号：AU1108401A

    公开(公告)日：2001-07-19

    申请号：AU1108401

    申请日：2001-01-05

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FOSCHINI GERARD JOSEPH ,  LOZANO ANGEL ,  RASHID-FARROKHI FARROKH ,  VALENZUELA REINALDO A

    IPC: H04J3/00 ,  H04B1/04 ,  H04B1/10 ,  H04B1/18 ,  H04B7/06 ,  H04B7/08 ,  H04B7/04 ,  H04L5/02

    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.

    Space-time diversity for wireless systems
    36.
    发明专利
    Space-time diversity for wireless systems 未知

    公开(公告)号：AU5715999A

    公开(公告)日：2000-06-08

    申请号：AU5715999

    申请日：1999-10-29

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： RASHID-FARROKHI FARROKH ,  VALENZUELA REINALDO A

    IPC: H04B7/005 ,  H04B7/02 ,  H04B7/06 ,  H04B7/26 ,  H04W52/34 ,  H04W52/42 ,  H04Q7/34 ,  H04Q7/30

    Abstract: The signal to interference and noise ratio (SINR) of wireless systems can be improved, if not optimized, by determining operating parameters used by the base station to substantially simultaneously control the transmit beam patterns that are each formed to establish a communication channel between a base station and a respective one of the wireless terminals as a function of received channel information from at least two of the wireless terminals. In an exemplary embodiment of the invention, the weight vectors and the power allocation employed by a base station are determined by the base station using information supplied by at least each of the wireless terminals served by the base station, and potentially from wireless terminals served by other base stations, e.g., in neighboring cells to the cell served by the base station, the information from the other cells being supplied via the neighboring cell base stations using inter-base-station communication, e.g., a wire line connection.

    METHODS FOR LOCATING TRANSMITTERS USING BACKWARD RAY TRACING
    39.
    发明申请
    METHODS FOR LOCATING TRANSMITTERS USING BACKWARD RAY TRACING 审中-公开
    使用后视雷达定位发射机的方法

    公开(公告)号：WO2008153548A4

    公开(公告)日：2009-05-28

    申请号：PCT/US2007023473

    申请日：2007-11-07

    Applicant: LUCENT TECHNOLOGIES INC ,  CHIZHIK DMITRY ,  VALENZUELA REINALDO A

    Inventor： CHIZHIK DMITRY ,  VALENZUELA REINALDO A

    IPC: G01S19/09 ,  G01S5/02 ,  G01S19/39

    CPC classification number: G01S5/12 ,  G01C21/206 ,  G01S5/0252

    Abstract: According to a method for localizing a transmitter inside a building, a transmitter emits rays which undergo multiple reflections with the walls, ceilings and floors of the building. Each of K receivers receives rays from the transmitter, and the receivers estimates the AOA (Angle of arrival), TOA (Time of Arrival) and power of each ray. At least one of the receivers uses a known blueprint of the building and material characteristics of the walls to localize the transmitter to a higher degree of accuracy by applying a backward ray tracing algorithm.

    Abstract translation: 根据用于将建筑物内的发射器定位的方法，发射器发射与建筑物的墙壁，天花板和地板进行多次反射的射线。 每个K个接收器接收来自发射机的光线，并且接收机估计AOA（到达角度），TOA（到达时间）和每个射线的功率。 至少一个接收器使用建筑物的已知蓝图和墙壁的材料特性，通过应用反向光线跟踪算法来将发射器定位成更高的准确度。

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