公开(公告)号：ES2070824T3

公开(公告)日：1995-06-16

申请号：ES87309122

申请日：1987-10-15

Applicant: QUALCOMM INC

Inventor： GILHOUSEN KLEIN S ,  JACOBS IRWIN M ,  WEAVER LINDSAY A JR

IPC: H04J13/00 ,  H04B7/15 ,  H04B7/216 ,  H04B7/26 ,  H04B7/185

公开(公告)号：MX173818B

公开(公告)日：1994-03-29

申请号：MX2636091

申请日：1991-06-24

Applicant: QUALCOMM INC

Inventor： WHEATLEY CHARLES E III ,  VITERBI ANDREW J ,  PADOVANI ROBERTO ,  GILHOUSEN KLEIN S ,  JACOBS IRWIN M ,  WEAVER LINDSAY A JR

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：PT98079A

公开(公告)日：1993-08-31

申请号：PT9807991

申请日：1991-06-24

Applicant: QUALCOMM INC

Inventor： GILHOUSEN KLEIN S ,  JACOBS IRWIN M ,  PADOVANI ROBERTO ,  WEAVER LINDSAY A ,  WHEATLEY CHARLES E ,  VITERBI ANDREW 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 ,  H04B7/00

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：NO925019D0

公开(公告)日：1992-12-23

申请号：NO925019

申请日：1992-12-23

Applicant: QUALCOMM INC

Inventor： GILHOUSEN KLEIN S ,  JACOBS IRWIN M ,  PADOVANI ROBERTO ,  WEAVER JR LINDSAY A ,  WHEATLEY III CHARLES E ,  VITERBI ANDREW 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 ,  H04L

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：FI925812A0

公开(公告)日：1992-12-21

申请号：FI925812

申请日：1992-12-21

Applicant: QUALCOMM INC

Inventor： GILHOUSEN KLEIN S ,  JACOBS IRWIN M ,  PADOVANI ROBERTO ,  WEAVER JR LINDSAY A ,  WHEATLEY CHARLES E III ,  VITERBI ANDREW 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：FI925812A

公开(公告)日：1992-12-21

申请号：FI925812

申请日：1992-12-21

Applicant: QUALCOMM INC

Inventor： GILHOUSEN KLEIN S ,  JACOBS IRWIN M ,  PADOVANI ROBERTO ,  WEAVER JR LINDSAY A ,  WHEATLEY CHARLES E III ,  VITERBI ANDREW 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：CA1310696C

公开(公告)日：1992-11-24

申请号：CA587200

申请日：1988-12-29

Applicant: QUALCOMM INC

Inventor： GILHOUSEN KLEIN S ,  ANTONIO FRANKLIN P ,  JACOBS IRWIN M ,  WEAVER LINDSAY A JR

IPC: G02B6/293 ,  G02B6/34 ,  G02B6/42 ,  H01S3/08 ,  H01S5/14 ,  H01S5/40 ,  H04B1/7136 ,  H04B7/212 ,  H04B10/155 ,  H04L5/16 ,  H04B7/26 ,  H04J3/26

Abstract: ALTERNATING SEQUENTIAL HALF DUPLEX COMMUNICATION SYSTEM A message communication system employing one or more centralized communication stations transferring messages through Earth orbit repeater satellites to or from mobile terminals with at least one central communication station having a first transceiver for transmitting a first communication signal to one or more mobile terminals and at least one mobile terminal having a second transceiver for receiving the first communication signal and demodulating it, and for transmitting at a predetermined duty cycle of the second transceiver, a second communication signal to at least one of the central communication stations. The preferred duty cycle over which the second communication signal is transmitted is about fifty percent of the second transceiver duty cycle. The communication system uses Time Division Multiplexed (TDM) communication signals using number of channels as designated address channels with the remainder being used for data transfer. Information transmitted on the address channels is used by terminals to determine both the presence of a message and its corresponding data transmission or reception channel. In addition the terminals use the reception of the first communication signal to adjust return link transmission frequency to compensate for transmission path errors. The alternating duty cycle allows mobile terminals to use a single set of local oscillators for both transmission and reception modes of operation. To decrease interference with other systems the present system employs a power dispersal ¢2536MPA7.A18! - 1 modulation function to achieve the footprint of a video signal for high transfer rate digital communication signals. ¢2536MPA7.A18! - 2

公开(公告)号：CA2085890A1

公开(公告)日：1991-12-26

申请号：CA2085890

申请日：1991-06-21

Applicant: QUALCOMM INC

Inventor： GILHOUSEN KLEIN S ,  JACOBS IRWIN M ,  PADOVANI ROBERTO ,  WEAVER LINDSAY A JR ,  WHEATLEY CHARLES E III ,  VITERBI ANDREW 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 ,  H04K1/04 ,  H04J15/00 ,  H04B7/216 ,  H04L27/32 ,  H04B1/76

Abstract: A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance. With orthogonal PN codes, the cross-correlation is zero over a predetermined time interval, resulting in no interference between the orthogonal codes, provided only that the code time frames are time aligned with each other. In an exemplary embodiment, signals are communicated between a cell-site (12, 14) and mobile units (16, 18) using direct sequence spread spectrum communication signals. In the cell-to-mobile link, pilot, sync, paging and voice channels are defined. Information communicated on the cell-to-mo- bile link channels are, in general, encoded, interleaved, bi-phase shift key (BPSK) modulated with orthogonal covering of each BPSK symbol along with quadrature phase shift key (QPSK) spreading of the covered symbols. In the mobile-to-cell link, access and voice channels are defined. Inform a- tion communicated on the mobile-to-cell link channels are, in general, en- coded, interleaved, orthogonal signalling along with QPSK spreading.