公开(公告)号：EP0983645A4

公开(公告)日：2003-01-22

申请号：EP98911764

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 ,  H04L1/00

CPC classification number: H04J3/0605 ,  H04B7/264

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'.

公开(公告)号：EP0815665A4

公开(公告)日：2000-09-27

申请号：EP96943532

申请日：1996-11-26

Applicant: MOTOROLA INC

Inventor： BRUCKERT EUGENE J ,  SEXTON THOMAS A

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

CPC classification number: H04L1/0002 ,  H04B2201/70703 ,  H04J13/0048 ,  H04J13/0077 ,  H04J13/10

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 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).

公开(公告)号：EP0732022A4

公开(公告)日：2000-11-29

申请号：EP95930789

申请日：1995-07-31

Applicant: MOTOROLA INC

Inventor： LING FUYUN ,  SEXTON THOMAS A ,  BRUCKERT GENE

IPC: H04L27/22 ,  H04B1/707 ,  H04J3/06 ,  H04L7/00 ,  H04L25/02 ,  H04L27/227 ,  H04L27/30 ,  H04K1/00

CPC classification number: H04B1/7087 ,  H04B1/707 ,  H04B1/7117 ,  H04B2201/70703 ,  H04B2201/70705 ,  H04J3/0605 ,  H04L25/0202 ,  H04L27/2276

Abstract: A method and apparatus is provided for facilitating coherent communication reception. A received reference symbol coded spread-spectrum communication signal is despread with a spreading code to derive a stream of reference samples (152) and a stream of data samples (158). The channel response is estimated by utilizing the stream of reference samples (152). An offset frequency detector (443) determines an offset to be applied to the received signal via a frequency locked loop (456), while a timing control (176) compensates for slow timing drift and fast fading based on power estimates derived from the stream of reference samples (152) and/or the stream of data samples (158). A rate estimator determines the rate at which the information was encoded, and the rate information is used to optimize the timing control (176), frequency offset detector (443) and channel estimator (154). Thus an improved detection of estimated data symbols from the stream of received data samples (158) is provided.

公开(公告)号：EP0917778A4

公开(公告)日：2003-01-29

申请号：EP97925661

申请日：1997-05-21

Applicant: MOTOROLA INC

Inventor： SEXTON THOMAS A ,  LING FUYUN ,  STEWART KENNETH A

IPC: H04L27/01 ,  H04B1/7085 ,  H04L7/00 ,  H04L7/033 ,  H04L7/10 ,  H04L27/22 ,  H04Q7/38 ,  H04B1/707 ,  H04B3/04

CPC classification number: H04B1/7085 ,  H04L7/0331

Abstract: The method includes acquiring a signal (501); inputting (502), at a first time, a received symbol to a demodulator having a plurality of outputs to produce a set of early outputs; inputting (504), at a second time, the received symbol to the demodulator to produce a set of on-time outputs; inputting (505), at a third time, the received symbol to the demodulator to produce a set of late outputs; and comparing (506) at least one output in the set of early outputs with at least one output in the set of late outputs to produce a timing measure.

公开(公告)号：EP0826273A4

公开(公告)日：2001-02-07

申请号：EP97903748

申请日：1997-01-03

Applicant: MOTOROLA INC

Inventor： BRUCKERT EUGENE J ,  SEXTON THOMAS A ,  LOVE ROBERT T ,  BAYER WILLIAM R

IPC: G01S11/06 ,  H04B7/005 ,  H04B7/26 ,  H04B15/00 ,  H03K9/00

CPC classification number: H04W52/12 ,  G01S11/06 ,  H04W52/282

Abstract: Power control in a spread spectrum communication system takes place by determining a speed of a remote unit (405) and assigning as a power-control threshold a target threshold based on the determined speed (410). An instantaneous threshold value is created (415) based on frame-quality information and the target threshold. An energy of a power-control group transmitted (430) from a remote unit is compared to the instantaneous threshold value and a power-adjustment command is determined. The power-adjustment command is transmitted to the remote unit instructing the remote unit to adjust its power accordingly.

Abstract translation: 扩频通信系统中的功率控制通过确定远端单元（405）的速度并基于所确定的速度（410）将功率控制阈值指定为目标阈值而发生。 基于帧质量信息和目标阈值来创建（415）瞬时阈值。 将从远程单元发送（430）的功率控制组的能量与瞬时阈值进行比较，并确定功率调整命令。 功率调整命令被发送到远程单元，指示远程单元相应地调整其功率。

公开(公告)号：EP0827651A4

公开(公告)日：2002-11-13

申请号：EP97901357

申请日：1997-01-03

Applicant: MOTOROLA INC

Inventor： SEXTON THOMAS A

IPC: H03M13/39 ,  H04B1/10 ,  H04B17/00 ,  H04L1/00 ,  H04B15/00 ,  G06F11/10 ,  H04B3/46 ,  H04K1/00 ,  H04L25/02 ,  H04L27/06 ,  H04L27/233 ,  H04L27/30 ,  H03M13/12

CPC classification number: H04L1/0071 ,  H03M13/39 ,  H04B17/309 ,  H04L1/0054

Abstract: The method includes receiving a signal (18) comprising a received frame (45), the received frame having a plurality of received symbols (68) and having a received information portion (47) and a received frame quality indicator (49); storing at least one of the plurality of received symbols in a memory (110); demodulating the received information portion to form a demodulated information portion and demodulating the received frame quality indicator to form a demodulated frame quality indicator, the demodulated information portion and the demodulated frame quality indicator comprising a demodulated frame (85); re-encoding at least a portion of the demodulated frame to form an encoded frame (93), the encoded frame having a plurality of encoded symbols; comparing (94) one of the plurality of encoded symbols with the at least one of the plurality of received symbols stored in the memory; and based on the comparison, estimating the channel parameter.