公开(公告)号：CS560890A3

公开(公告)日：1992-04-15

申请号：CS560890

申请日：1990-11-13

Applicant: MOTOROLA INC

Inventor： LABEDZ GERALD P ,  ATKINSON FREDERIK G ,  RABE DUANE C ,  SCHULER JOSEPH J ,  WERRONEN ALTON P

IPC: H04B7/08 ,  H04L1/06 ,  H04L1/02

Abstract: A method and apparatus for diversity reception in a communication system is provided. A dual branch receiver (100, 101) is provided with a stored replica of expected reference information (104) so that correlation with received time-dispersed signals produces an estimate of the transmission channel's impulse response as seen by each branch (100, 101), and determines, among other things, phase error between the branch local oscillators (208, 209) and the time-dispersed signals. Matched filters (214, 215) are constructed which then coherently align the time-dispersed signals from each branch (100, 101) with that branch's local oscillator (208, 209) which constitutes a part of the signal equalization. A diversity processor (105) performs bit by bit selection on the re-aligned signals, maximal ratio combining of the re-aligned signals, or equal gain combining of the re-aligned signals, followed by a sequence estimation which uses similarly selected or combined channel distortion compensation parameters to complete the equalization process on the new signal.

公开(公告)号：PT95871B

公开(公告)日：1999-03-31

申请号：PT9587190

申请日：1990-11-13

Applicant: MOTOROLA INC

Inventor： LABEDZ GERALD PAUL ,  ATKINSON FREDERICK G ,  RABE DUANE C ,  SCHULER JOSEPH J ,  WERRONEN ALTON P

IPC: H04B7/08 ,  H04L1/06

Abstract: A method and apparatus for diversity reception in a communication system is provided. A dual branch receiver (100, 101) is provided with a stored replica of expected reference information (104) so that correlation with received time-dispersed signals produces an estimate of the transmission channel's impulse response as seen by each branch (100, 101), and determines, among other things, phase error between the branch local oscillators (208, 209) and the time-dispersed signals. Matched filters (214, 215) are constructed which then coherently align the time-dispersed signals from each branch (100, 101) with that branch's local oscillator (208, 209) which constitutes a part of the signal equalization. A diversity processor (105) performs bit by bit selection on the re-aligned signals, maximal ratio combining of the re-aligned signals, or equal gain combining of the re-aligned signals, followed by a sequence estimation which uses similarly selected or combined channel distortion compensation parameters to complete the equalization process on the new signal.

公开(公告)号：SI9012143A

公开(公告)日：1998-02-28

申请号：SI9012143

申请日：1990-11-12

Applicant: MOTOROLA INC

Inventor： LABEDZ GERALD P ,  ATKINSON FREDERICK G ,  RABE DUANE C ,  SCHULER JOSEPH J ,  WERRONEN ALTON P

IPC: H04B7/08 ,  H04L1/06

Abstract: A procedure and device for variable reception in a communication system are presented. The receiver (100, 101) featuring two branches is equipped with a stored replica of the anticipated reference information (104), so that the correlation to the received time dispersed signal produces an estimate of the channel impulse response upon transmission, as seen by each of the branches (100, 101) thus among others determining the phase error rate between local oscillators (208, 209) within each branch and the time dispersed signals. Adapted filters (214, 215) are provided which then coherently align time dispersed signals from each of the branches (100, 101) with the local oscillator (208, 209) of the branch, being part of the signal alignment. A variable processor (105) executes a bit by bit selection on the realigned signals, combining with the largest ratio of the realigned signals or combining with realigned signals of equal amplification, followed by the estimation of the sequence, which uses similarly selected or combined parameters by channel distortion equalisation to conclude the equalisation process for a new signal.

公开(公告)号：MX9101264A

公开(公告)日：1992-05-04

申请号：MX9101264

申请日：1991-09-25

Applicant: MOTOROLA INC

Inventor： FELIX KENNETH A ,  WERRONEN ALTON P ,  HART THOMAS B ,  HARDMAN SCOTT A ,  HULSEBOSCH THOMAS G

IPC: H04W36/30 ,  H04B7/00 ,  H04M11/00

公开(公告)号：AU6887891A

公开(公告)日：1991-06-13

申请号：AU6887891

申请日：1990-11-07

Applicant: MOTOROLA INC

Inventor： LABEDZ GERALD P ,  ATKINSON FREDERICK G ,  RABE DUANE C ,  SCHULER JOSEPH J ,  WERRONEN ALTON P

IPC: H04B7/08 ,  H04L1/06

Abstract: A method and apparatus for diversity reception in a communication system is provided. A dual branch receiver (100, 101) is provided with a stored replica of expected reference information (104) so that correlation with received time-dispersed signals produces an estimate of the transmission channel's impulse response as seen by each branch (100, 101), and determines, among other things, phase error between the branch local oscillators (208, 209) and the time-dispersed signals. Matched filters (214, 215) are constructed which then coherently align the time-dispersed signals from each branch (100, 101) with that branch's local oscillator (208, 209) which constitutes a part of the signal equalization. A diversity processor (105) performs bit by bit selection on the re-aligned signals, maximal ratio combining of the re-aligned signals, or equal gain combining of the re-aligned signals, followed by a sequence estimation which uses similarly selected or combined channel distortion compensation parameters to complete the equalization process on the new signal.