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    COLLISION RECOVERY SIGNAL PROCESSING UNIT USED WITH MULTIPLE ACCESS COMMUNICATION CHANNEL
    2.
    发明专利
    COLLISION RECOVERY SIGNAL PROCESSING UNIT USED WITH MULTIPLE ACCESS COMMUNICATION CHANNEL 失效

    公开(公告)号：JP2001292484A

    公开(公告)日：2001-10-19

    申请号：JP2001038614

    申请日：2001-02-15

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： KUZMINSKIY ALEXANDR ,  LUSCHI CARLO ,  SAMARAS KONSTANTINOS

    IPC: H04B7/005 ,  H04B7/26 ,  H04L1/00 ,  H04L1/06 ,  H04L12/56 ,  H04W28/04 ,  H04W74/08 ,  H04Q7/38

    Abstract: PROBLEM TO BE SOLVED: To provide a method for solving collision through the use of an acquisition system and to provide a device to perform this method. SOLUTION: The collision recovery signal processing unit 48 of this invention has an antenna 50 having branches, time spatial filter means 52, 54 that are respectively configured to estimate a signal received by the antenna through the reception of different sequences of a training type symbol TLS so as to provide corresponding object signals SC1-SCM, and a signal selector 56 that is configured to select one signal or more from the object signals in compliance with a prescribed criterion. The prescribed criterion means a distance of the object signal from a finite alphabet or a mean square error among the object signals. The time spatial filter means 52, 54 perform an algorithm or a semi- blind algorithm on the basis of the same training.

    CELLULAR WIRELESS COMMUNICATION SYSTEM
    3.
    发明专利
    CELLULAR WIRELESS COMMUNICATION SYSTEM 失效

    公开(公告)号：JP2002009678A

    公开(公告)日：2002-01-11

    申请号：JP2001124024

    申请日：2001-04-23

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： KUZMINSKIY ALEXANDR ,  LUSCHI CARLO ,  STRAUCHI PAUL EDWARD ,  YAN RAN-HONG

    IPC: H04B1/10 ,  H04B7/005 ,  H04B7/08 ,  H04B7/26 ,  H04L1/06 ,  H04L1/20 ,  H04L25/03

    Abstract: PROBLEM TO BE SOLVED: To provide a wireless communication system that can overcome both the noise and interference faults. SOLUTION: At least one of a mobile station and a base station in the wireless communication system is provided with receivers 6, 8 that receives a data signal, an attached noise propagated from a station with which linking is set up, an interference signal propagated from a station in other cell, an equalization system 12 on trellis basis, that acts like detecting a data symbol coming from a faulty part which accompanies a distorted reception signal, a spatial-time filter 14 that processes the received signal minimizing distortion of data and a fault (C), and a changeover device 10 that responds to a prescribed criterion relating to a power of the interference signal in the received signal and a power of the noise signal (D) and the received signal is switched between the equalization system 12 on trellis basis and the spatial-time filter 14.

    CHANNEL IMPULSE RESPONSE ESTIMATING METHOD
    4.
    发明专利
    CHANNEL IMPULSE RESPONSE ESTIMATING METHOD 失效

    公开(公告)号：JP2000059273A

    公开(公告)日：2000-02-25

    申请号：JP12016699

    申请日：1999-04-27

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： LUSCHI CARLO ,  MUJTABA SYED AON ,  SANDELL MAGNUS ,  STRAUCHI PAUL EDWARD ,  YAN RAN-HONG ,  TEN BRINK STEPHAN

    IPC: H04L27/01 ,  H04L25/02 ,  H04B7/005 ,  H04L25/03

    Abstract: PROBLEM TO BE SOLVED: To obtain an equalizer which has the effect of propagation reduced for the estimation of the channel impulse response of a transmit signal. SOLUTION: The channel impulse response of a signal transmitted over a channel of a communication system is estimated. Previous information regarding a transmit signal is obtained first. Then an estimated value of channel impulse response which minimizes an expected value of the distance between the transmit signal and a reconstituted signal is selected by using the transmit signal and previous information. For example, the minimized distance expected value is a cost function and represented, specially, as E ||r-Bh||2|r}. Here, (r) is a received signal, (h) is a vector representing the channel, and B is a matrix including transmission bits as components. Further, the previous information is obtained through data estimation which is performed for the transmit signal and obtained, specially, by a channel decoder 14. Further, an estimated value by, for example, channel observation is selected.

    REPEATED CHANNEL ESTIMATION
    5.
    发明专利
    REPEATED CHANNEL ESTIMATION 失效

    公开(公告)号：JP2000004190A

    公开(公告)日：2000-01-07

    申请号：JP12085999

    申请日：1999-04-28

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： BAR-DAVID ISRAEL ,  LUSCHI CARLO ,  YAN RAN-HONG

    IPC: H04B7/005 ,  H04B1/10 ,  H04L25/02

    Abstract: PROBLEM TO BE SOLVED: To obtain an improved estimation strategy by estimating a channel impulse response, estimating data in a signal by using it, repeating this process at least one time by using an output, providing improved channel impulse response estimation and performing it by using correlation channel measurement in this case. SOLUTION: A switch 1 selects a pseudo training sequence about respective repeating after the first passing. The sequence is obtained by formatting a data bit and the original training sequence bit to an actual burst structure. In the case of decision feedback from an equalizer output, a slicer 16 selects an input signal in an output of a data estimating part 11 and offers an output signal to a line 5. In the case of feedback from a decoder output, the switch selects a signal in an output of a channel decoder 13.

    7.
    发明专利
    未知

    公开(公告)号：DE69935088T2

    公开(公告)日：2007-11-15

    申请号：DE69935088

    申请日：1999-04-27

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： BAR-DAVID ISRAEL ,  YAN RAN-HONG ,  LUSCHI CARLO

    IPC: H04B7/005 ,  H04L25/02 ,  H04B1/10

    Abstract: A method and apparatus for estimating channel impulse response and data in a signal transmitted over a channel in a communication system. The channel impulse response is estimated uses correlative channel sounding, and then, using the estimated channel impulse response, the data in the signal is estimated. The output is then fed back to the channel impulse response estimator and the channel impulse estimation is repeated. The data estimation and channel impulse response estimation may be iterated a number of times.

    A frequency estimator
    9.
    发明专利
    A frequency estimator 未知

    公开(公告)号：GB2375272A

    公开(公告)日：2002-11-06

    申请号：GB0110537

    申请日：2001-04-30

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： LUSCHI CARLO ,  STRAUCH PAUL EDWARD ,  KUZMINSKIY ALEXANDER

    IPC: H04L27/00 ,  H04L27/233 ,  H04L7/02

    Abstract: A frequency estimator is provided for use in a receiver of packetized data in eg. a TDMA system. The frequency estimator determines the signal frequency error ( f o ) with which a data packet has been received. It does this by relating data (gn) representative of some symbols to decisions (Sn) on those symbols. These symbols include not only training symbols (Nt) but also some information symbols (Nadd). The training sequence and input signal are fed into an equalizer and the frequency estimated according to "soft" and "hard" data and decisions based thereon.

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