中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

26 records (took 0.02 seconds)

    12.
    发明专利
    未知

    公开(公告)号：BR9809366A

    公开(公告)日：2000-07-04

    申请号：BR9809366

    申请日：1998-03-13

    Applicant: MOTOROLA INC

    Inventor： BUCKERT EUGENE J ,  SEXTON THOMAS A

    IPC: H04B7/26 ,  H04J3/06 ,  H04J11/00 ,  H04Q7/38 ,  H04B7/216 ,  H04J13/00

    Abstract: In a communication system where a continuous reverse channel transmission is utilized by redundant transmission of Walsh codes, a current transmission rate is modulated onto Walsh code polarity. In particular, a remote unit operating at a particular transmission rate utilizing a continuous reverse channel transmission modulates the transmission rate by setting the polarity of each Walsh code depending upon the current or future data traffic channel rate. In communication systems where a Reference Coherent (RC) type transmission is utilized, the particular transmission rate is modulated onto the reference symbols (501-517) by setting the reference symbols (501-517) equal to a binary "1" or "0".

    13.
    发明专利
    未知

    公开(公告)号：BR9607788A

    公开(公告)日：1998-07-07

    申请号：BR9607788

    申请日：1996-11-26

    Applicant: MOTOROLA INC

    Inventor： SEXTON THOMAS A ,  BRUCKERT EUGENE

    IPC: H04J11/00 ,  H04J13/00 ,  H04J13/10 ,  H04L1/00 ,  H04Q7/38 ,  H04J13/04 ,  H04B1/707

    Abstract: A method for transmitting a communication signal (20) having a data rate over a plurality of spread spectrum traffic channels includes determining a first number of traffic channels required to transmit the communication signal at the data rate, and determining a second number of traffic channels (502) available for transmitting the communication signal (20). In response to a comparison of the first number of traffic channels to the second number of traffic channels, a first traffic channel (54) for transmitting a first portion of the communication signal (50, 51) and a second traffic channel (56) for transmitting a second portion of the communication signal (52, 53) are selected from the. second number of traffic channels (502). The selection of the first traffic channel (54) is non deterministic of the selection of the second traffic channel (56).

    METHOD AND APPARATUS FOR TRANSMISSION AND RECEPTION OF A TRANSMISSION RATE IN A CDMA COMMUNICATION SYSTEM
    16.
    发明专利
    METHOD AND APPARATUS FOR TRANSMISSION AND RECEPTION OF A TRANSMISSION RATE IN A CDMA COMMUNICATION SYSTEM 未知

    公开(公告)号：CA2287954C

    公开(公告)日：2002-12-17

    申请号：CA2287954

    申请日：1998-03-13

    Applicant: MOTOROLA INC

    Inventor： BRUCKERT EUGENE J ,  SEXTON THOMAS A

    IPC: H04B7/26 ,  H04J3/06 ,  H04J11/00 ,  H04Q7/38 ,  H04B7/216 ,  H04J13/00

    Abstract: In a communication system where a continuous reverse channel transmission is utilized by redundant transmission of Walsh codes, a current transmission ra te is modulated onto Walsh code polarity. In particular, a remote unit operatin g at a particular transmission rate utilizing a continuous reverse channel transmission modulates the transmission rate by setting the polarity of each Walsh code depending upon the current or future data traffic channel rate. I n communication systems where a Reference Coherent (RC) type transmission is utilized, the particular transmission rate is modulated onto the reference symbols (501-517) by setting the reference symbols (501-517) equal to a bina ry "1" or "0".

    METHOD AND SYSTEM FOR COMMUNICATION OVER MULTIPLE CHANNELS IN A SPREAD SPECTRUM COMMUNICATION SYSTEM
    17.
    发明专利
    METHOD AND SYSTEM FOR COMMUNICATION OVER MULTIPLE CHANNELS IN A SPREAD SPECTRUM COMMUNICATION SYSTEM 未知

    公开(公告)号：CA2214809C

    公开(公告)日：2002-09-24

    申请号：CA2214809

    申请日：1996-11-26

    Applicant: MOTOROLA INC

    Inventor： SEXTON THOMAS A ,  BRUCKERT EUGENE J

    IPC: H04J11/00 ,  H04J13/00 ,  H04J13/10 ,  H04L1/00 ,  H04Q7/38 ,  H04B1/69

    Abstract: A method for transmitting a communication signal (20) having a data rate ove r a plurality of spread spectrum traffic channels includ es determining a first number of traffic channels required to transmit the comm unication signal at the data rate, and determining a sec ond number of traffic channels (502) available for transmitting the communicatio n signal (20). In response to a comparison of the first number of traffic to the second number of traffic channels, a first traffic channel (54) for transmitting a first portion of the communicat ion signal (50, 51) and a second traffic channel (56) for transmitting a second portion of the communication signal (52, 53) are selected from the second number of traffic channels (502). The selection of the first traffic channel (54) is non deterministic of the selection of th e second traffic channel (56).

    18.
    发明专利
    未知

    公开(公告)号：BR9607811A

    公开(公告)日：1998-07-07

    申请号：BR9607811

    申请日：1996-10-28

    Applicant: MOTOROLA INC

    Inventor： SEXTON THOMAS A ,  LING FUYUN

    IPC: H04L27/18 ,  H04B1/10 ,  H04B7/26 ,  H04L7/02 ,  H04L25/02 ,  H04J13/00

    Abstract: A receiver (200, 400) implements improved channel estimation. The receiver (200, 400) demodulates a transmitted signal, and makes an initial channel estimate (115). The receiver (200, 400) then makes a hard decision (301) as to whether the channel estimate was correct and groups samples representing the decision. A vector sum of the group of samples is computed (302), and each sample is compared to the vector sum (303). The sample having the largest projection on the vector sum is retained (304), and the other samples are considered noise, and are thus discarded (305). After obtaining a predetermined number of retained samples (306), the retained samples are used to generate an new channel estimate (226). Since the noisy estimates are discarded, the new channel estimate (226) contains fewer errors than the initial channel estimate (115). The new channel estimate (226) is used to generate decoded data (250).

    METHOD AND SYSTEM FOR COMMUNICATION OVER MULTIPLE CHANNELS IN A SPREAD SPECTRUM COMMUNICATION SYSTEM
    19.
    发明专利
    METHOD AND SYSTEM FOR COMMUNICATION OVER MULTIPLE CHANNELS IN A SPREAD SPECTRUM COMMUNICATION SYSTEM 未知

    公开(公告)号：CA2214809A1

    公开(公告)日：1997-07-24

    申请号：CA2214809

    申请日：1996-11-26

    Applicant: MOTOROLA INC

    Inventor： SEXTON THOMAS A ,  BRUCKERT EUGENE J

    IPC: H04J11/00 ,  H04J13/00 ,  H04J13/10 ,  H04L1/00 ,  H04Q7/38 ,  H04B1/69

    Abstract: A method for transmitting a communication signal (20) having a data rate ove r a plurality of spread spectrum traffic channels includ es determining a first number of traffic channels required to transmit the comm unication signal at the data rate, and determining a sec ond number of traffic channels (502) available for transmitting the communicatio n signal (20). In response to a comparison of the first number of traffic to the second number of traffic channels, a first traffic channel (54) for transmitting a first portion of the communicat ion signal (50, 51) and a second traffic channel (56) for transmitting a second portion of the communication signal (52, 53) are selected from the second number of traffic channels (502). The selection of the first traffic channel (54) is non deterministic of the selection of th e second traffic channel (56).

Patent Agency Ranking