公开(公告)号：DE69133017T2

公开(公告)日：2003-02-06

申请号：DE69133017

申请日：1991-06-21

Applicant: QUALCOMM INC

Inventor： GILHOUSEN S ,  JACOBS M ,  PADOVANI ROBERTO ,  WEAVER A ,  WHEATLEY E ,  VITERBI J

IPC: H04B1/707 ,  H04B1/7075 ,  H04B1/709 ,  H04B1/7115 ,  H04B7/005 ,  H04B7/26 ,  H04J3/02 ,  H04J3/16 ,  H04J3/22 ,  H04J11/00 ,  H04J13/00 ,  H04J13/10 ,  H04J13/18 ,  H04L20060101 ,  H04L1/00 ,  H04L1/06 ,  H04L1/08 ,  H04L5/02 ,  H04L5/12 ,  H04L23/02 ,  H04L27/30 ,  H04W52/26

Abstract: A cell site, comprising: means for modulating configured to format digital data for transmission on a communications channel and to insert at least one timing command into the digital data, the digital data comprising a plurality of bits; means for transmitting coupled to the means for modulating and configured to receive the digital data from the means for modulating, convert the digital data to analog data, and transmit the analog data on the communications channel; and means for receiving configured to receive a signal from at least one remote unit and to determine a timing error of the received signal to be used to generate the timing command in accordance with the timing error, the means for receiving being coupled to the means for modulating and configured to provide the timing command to the means for modulating.

公开(公告)号：DE69133017D1

公开(公告)日：2002-06-27

申请号：DE69133017

申请日：1991-06-21

Applicant: QUALCOMM INC

Inventor： GILHOUSEN S ,  JACOBS M ,  PADOVANI ROBERTO ,  WEAVER A ,  WHEATLEY E ,  VITERBI J

IPC: H04B1/707 ,  H04B1/7075 ,  H04B1/709 ,  H04B1/7115 ,  H04B7/005 ,  H04B7/26 ,  H04J3/02 ,  H04J3/16 ,  H04J3/22 ,  H04J11/00 ,  H04J13/00 ,  H04J13/10 ,  H04J13/18 ,  H04L20060101 ,  H04L1/00 ,  H04L1/06 ,  H04L1/08 ,  H04L5/02 ,  H04L5/12 ,  H04L23/02 ,  H04L27/30 ,  H04W52/26

Abstract: A cell site, comprising: means for modulating configured to format digital data for transmission on a communications channel and to insert at least one timing command into the digital data, the digital data comprising a plurality of bits; means for transmitting coupled to the means for modulating and configured to receive the digital data from the means for modulating, convert the digital data to analog data, and transmit the analog data on the communications channel; and means for receiving configured to receive a signal from at least one remote unit and to determine a timing error of the received signal to be used to generate the timing command in accordance with the timing error, the means for receiving being coupled to the means for modulating and configured to provide the timing command to the means for modulating.

公开(公告)号：DE69433899T2

公开(公告)日：2005-08-04

申请号：DE69433899

申请日：1994-10-26

Applicant: QUALCOMM INC

Inventor： ZEHAVI EPHRAIM ,  VITERBI J

IPC: G03G15/01 ,  G06T1/00 ,  H03M13/23 ,  H03M13/27 ,  H04B1/707 ,  H04B14/04 ,  H04J3/16 ,  H04L1/00 ,  H04L1/08 ,  H04L25/22 ,  H04L27/18 ,  H04N1/46 ,  H04N1/56 ,  H04N1/60 ,  H04L25/02 ,  H04L27/22 ,  H04L27/34 ,  H04L1/12

Abstract: A communication system for transmitting variable rate data is disclosed wherein redundancy is added to the variable rate data to provide repetition symbols. The repetition symbol data is transmitted with symbol energy scaled in accordance to the rate of the variable rate data when the variable rate data is greater than or equal to a nominal data rate. When the variable rate data is less than the nominal data rate, the symbol data is transmitted at nominal symbol energy and redundancy is removed by transmission gating of a proportion of the transmission symbol data determined in accordance with the rate of the variable rate data. Furthermore, a receiver for receiving the variable rate data is disclosed which uses the redundancy in the transmitted data symbol stream to make a corrected estimate of the transmitted symbol data.

公开(公告)号：DE69433899D1

公开(公告)日：2004-08-19

申请号：DE69433899

申请日：1994-10-26

Applicant: QUALCOMM INC

Inventor： ZEHAVI EPHRAIM ,  VITERBI J

IPC: G03G15/01 ,  G06T1/00 ,  H03M13/23 ,  H03M13/27 ,  H04B1/707 ,  H04B14/04 ,  H04J3/16 ,  H04L1/00 ,  H04L1/08 ,  H04L25/22 ,  H04L27/18 ,  H04N1/46 ,  H04N1/56 ,  H04N1/60 ,  H04L25/02 ,  H04L27/22 ,  H04L27/34 ,  H04L1/12

Abstract: A communication system for transmitting variable rate data is disclosed wherein redundancy is added to the variable rate data to provide repetition symbols. The repetition symbol data is transmitted with symbol energy scaled in accordance to the rate of the variable rate data when the variable rate data is greater than or equal to a nominal data rate. When the variable rate data is less than the nominal data rate, the symbol data is transmitted at nominal symbol energy and redundancy is removed by transmission gating of a proportion of the transmission symbol data determined in accordance with the rate of the variable rate data. Furthermore, a receiver for receiving the variable rate data is disclosed which uses the redundancy in the transmitted data symbol stream to make a corrected estimate of the transmitted symbol data.