公开(公告)号：CA2065739C

公开(公告)日：1996-09-24

申请号：CA2065739

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 ,  H04B1/16 ,  H04B7/02

Abstract: A method and apparatus for diversity reception in a communication system is provided. A dual branch receiver (102, 103) is provided with a stored replica of expected reference information so that correlation with received time-dispersed signals (100, 101) produces an estimate of the transmission channel's impulse response as seen by each branch, and determines, among other things, phase error between the branch local oscillators and the time-dispersed signals. Matched filters (214, 215) are constructed which then coherently align the time-dispersed signals from each branch 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：CA2089365C

公开(公告)日：1996-06-11

申请号：CA2089365

申请日：1991-08-16

Applicant: MOTOROLA INC

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

IPC: H04W36/30 ,  H04Q7/38 ,  H04B7/26

Abstract: A cellular system transfers a call from a source base-site (200) to one target base-site (205, 210). A source base-site (200) measures the signal strength (RSSIS) of a mobile (225), provides a forecasted signal strength (RSSIF) and sets up two time windows. The source base-site (200) sends the measured and forecasted signal strengths to candidate base-sites (205, 210) found by the mobile (225) which measure the mobile (225) signal strength (RSSIT) and compare it to (RSSIS + hysteresis value). If RSSIT> RSSIS, the call is transferred to the best responding cell. If RSSIT RSSIF at any candidate base-sites (205, 210), the call is transferred to the responding base-site (205, 210). If the source base-site (200) receives no responses during the second time window, the process ends.

公开(公告)号：CS9005608A3

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

CPC classification number: H04B7/0845 ,  H04B7/084 ,  H04B7/0857 ,  H04B7/0888 ,  H04L1/06

公开(公告)号：CA2089365A1

公开(公告)日：1992-03-28

申请号：CA2089365

申请日：1991-08-16

Applicant: MOTOROLA INC

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

IPC: H04W36/30

公开(公告)号：PL167072B1

公开(公告)日：1995-07-31

申请号：PL28773990

申请日：1990-11-13

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.

公开(公告)号：MX173850B

公开(公告)日：1994-04-06

申请号：MX9101264

申请日：1991-09-25

Applicant: MOTOROLA INC

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

IPC: H04W36/30 ,  H04Q7/00

公开(公告)号：PL287739A1

公开(公告)日：1991-07-29

申请号：PL28773990

申请日：1990-11-13

Applicant: MOTOROLA INC

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

IPC: H04B7/08 ,  H04L1/06 ,  H04B1/10 ,  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：CA2065739A1

公开(公告)日：1991-05-14

申请号：CA2065739

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.

公开(公告)号：MX167843B

公开(公告)日：1993-04-15

申请号：MX2324490

申请日：1990-11-08

Applicant: MOTOROLA INC

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

IPC: H04B7/08 ,  H04L1/06 ,  H04B7/005

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：PT95871A

公开(公告)日：1992-10-30

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 ,  H04B7/00 ,  H04L1/00

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.