公开(公告)号：AU8073094A

公开(公告)日：1995-05-22

申请号：AU8073094

申请日：1994-09-29

Applicant: MOTOROLA INC

Inventor： BATTIN JOHN W ,  LYNK CHARLES N JR ,  LAIRD KEVIN M

IPC: H04B7/06 ,  G10L19/00 ,  H04B7/26 ,  H04J3/16 ,  H04W88/18 ,  H04B7/00

Abstract: A digital radiotelephone system employs vocoders to convert between analog speech and a digital format suitable for transmission via radio. Under most circumstances, the highest data rate is selected for optimum audio quality. When the system occupancy exceeds a particular threshold, as detected at the fixed site of the system, some or all of the vocoders are instructed to switch to a lower data rate to provide for an increase in the number of communication channels. Further, a portable subscriber unit may autonomously change its vocoder data rate depending upon the charge state of its battery.

公开(公告)号：FR2711883A1

公开(公告)日：1995-05-05

申请号：FR9412600

申请日：1994-10-21

Applicant: MOTOROLA INC

Inventor： BATTIN JOHN W ,  LYNK CHARLES N JR ,  LAIRD KEVIN M

IPC: H04B7/06 ,  G10L19/00 ,  H04B7/26 ,  H04J3/16 ,  H04W88/18 ,  H04Q7/28

Abstract: A digital radiotelephone system employs vocoders to convert between analog speech and a digital format suitable for transmission via radio. Under most circumstances, the highest data rate is selected for optimum audio quality. When the system occupancy exceeds a particular threshold, as detected at the fixed site of the system, some or all of the vocoders are instructed to switch to a lower data rate to provide for an increase in the number of communication channels. Further, a portable subscriber unit may autonomously change its vocoder data rate depending upon the charge state of its battery.

公开(公告)号：EP1290814A4

公开(公告)日：2006-05-10

申请号：EP01939658

申请日：2001-05-30

Applicant: MOTOROLA INC

Inventor： HARRISON ROBERT M ,  LAIRD KEVIN M ,  MYARA DAVID ,  BULJORE SOODESH

IPC: H04B7/06 ,  G01S3/74 ,  H01Q3/26 ,  H04B7/08 ,  H04B7/26

CPC classification number: H04B7/0634 ,  H01Q3/2605 ,  H04B7/0639 ,  H04B7/0656

Abstract: A transmitter (300) uses adaptive array weights to modify a gain and a phase of a communication signal (TCH1) to produce a plurality of element communication signals coupled to antenna elements (1...n) in an adaptive array antenna (302). The communication signal is transmitted along with an element pilot signal (P1...Pn) that is coupled to one of the elements in the adaptive array antenna (302). In a receiver, the communication signal is received, and the element pilot signal is received. Thereafter, the adaptive array weights used at the transmitter (300) are estimated in response to comparing characteristics of the received element pilot signal (P1...Pn) to characteristics of the received communication signal.

公开(公告)号：EP0676102A4

公开(公告)日：1996-08-07

申请号：EP94931781

申请日：1994-09-29

Applicant: MOTOROLA INC

Inventor： BATTIN JOHN W ,  LYNK CHARLES N JR ,  LAIRD KEVIN M

IPC: H04B7/06 ,  G10L19/00 ,  H04B7/26 ,  H04J3/16 ,  H04W88/18 ,  H04B7/00

CPC classification number: H04W88/181 ,  G10L19/00 ,  H04J3/1688

Abstract: A digital radiotelephone system employs vocoders (401, 403) to convert between analog speech and a digital format suitable for transmission via radio. Under most circumstances, the highest data rate is selected for optimum audio quality. When the system occupancy exceeds a particular threshold, as detected at the fixed site of the system, some or all of the vocoders (401, 403) are instructed to switch to a lower data rate to provide for an increase in the number of communication channels. Further, a portable subscriber unit (103, 111, 113) may autonomously change its vocoder data rate depending upon the charge state of its battery.

公开(公告)号：EP1508213A4

公开(公告)日：2009-04-01

申请号：EP03724400

申请日：2003-05-05

Applicant: MOTOROLA INC

Inventor： AHMED MANSOOR ,  ROHANI KAMYAR ,  LAIRD KEVIN M

IPC: H04L1/16 ,  H04B7/26 ,  H04L1/00 ,  H04L1/18 ,  H04L29/08 ,  H04Q7/38 ,  H04J3/24

CPC classification number: H04L1/0068 ,  H04L1/0003 ,  H04L1/0026 ,  H04L1/1819 ,  H04L1/1825

Abstract: A method 600 of selecting an ARQ method for retransmitting a data frame (Fig. 4) based on an accumulated signal to noise ratio (SNR) of systematic bits in the data frame at a receiving unit 508. The sending unit 500 tracks the accumulated SNR of systematic bits by using channel SNR measurement reports sent by the receiving unit 508. The method utilizes Chase combining of re-transmitted systematic bits (via Partial incremental redundancy transmissions) until the accumulated SNR of the systematic bits has reached a suitable value, and then switches to sending only parity bits (via Full incremental redundancy) in retransmissions. In addition, the method alters the allocation of resources, such as code power, to provide only that necessary for successful decoding of the transmitted frame. The sending unit 500 informs the receiving unit 508 of the type of transmission, number of the transmission and/or resource allocation associated with the data frame.

公开(公告)号：EP0596894A4

公开(公告)日：1994-08-17

申请号：EP92911983

申请日：1992-03-27

Applicant: MOTOROLA INC

Inventor： BARRETT STEVEN T ,  LAIRD KEVIN M ,  MURRAY RICHARD E ,  O'CONNOR JAMES M

IPC: H04Q7/38 ,  H04K1/00 ,  H04L9/06 ,  H04L9/08 ,  H04L9/14 ,  H04L9/16 ,  H04L9/00

CPC classification number: H04L9/0894 ,  H04L9/16 ,  H04L2209/80