公开(公告)号：MY109076A

公开(公告)日：1996-11-30

申请号：MYPI19920761

申请日：1992-05-02

Applicant: QUALCOMM INC

Inventor： JACK KEIL WOLF

IPC: H04L27/20 ,  H03M13/25 ,  H03M13/41 ,  H04L27/18

Abstract: A CODEC FOR RESOLVING TRANSMISSION PHASE AMBIGUITIES IN THE M-ARY PSK MODULATION OF TRELLIS CODED DATA. A TRELLIS ENCODER (10) USES A DIFFERENTIAL ENCODER (22) AND A CONVOLUTIONAL ENCODER (24), ALONG WITH MULTIPLEXED DIFFERENTIAL ENCODERS (18, 20), TO GENERATE FROM SETS OF INPUT DATA BITS CORRESPONDING PHASE POINT VALUES FOR USE IN M-ARY PSK CARRIER MODULATION (12). A TRELLIS DECODER (32) USES A VITERBI DECODER (40) AND A DIFFERENTIAL DECODER (50), ALONG WITH MULTIPLEXED DIFFERENTIAL DECODERS (46, 48), TO PRODUCE ESTIMATES OF THE ORIGINAL INPUT DATA BITS FROM THE RECEIVED SIGNAL SECTOR VALUE.(FIG 2)

公开(公告)号：ZA923193B

公开(公告)日：1993-04-28

申请号：ZA923193

申请日：1992-04-30

Applicant: QUALCOMM INC

Inventor： WOLF JACK KEIL ,  JACK KEIL WOLF

IPC: H03M13/25 ,  H03M13/41 ,  H04L27/18 ,  H03M ,  H04L

Abstract: A codec for resolving transmission phase ambiguities in the M-ary PSK modulation of trellis coded data. A trellis encoder uses a differential encoder and a convolutional encoder, along with multiplexed differential encoders, to generate from sets of input data bits corresponding phase point values for use in M-ary PSK carrier modulation. A trellis decoder uses a Viterbi decoder and a differential decoder, along with multiplexed differential decoders, to produce estimates of the original input data bits from the received signal sector value.

公开(公告)号：MY113287A

公开(公告)日：2002-01-31

申请号：MYPI19942519

申请日：1994-09-21

Applicant: QUALCOMM INC

Inventor： JACK KEIL WOLF ,  EPHRAIM ZEHAVI ,  DANIEL RAY KINDRED ,  BRIAN K BUTLER

IPC: H03M13/00 ,  H03M13/23 ,  H04L1/12 ,  H03M13/37 ,  H03M13/41 ,  H04B1/707 ,  H04B7/26 ,  H04L1/00 ,  H04L1/08 ,  H04L1/20 ,  H04L25/02 ,  H04L25/03 ,  H04L25/08

Abstract: A VITERBI DECODER (50) FOR RECOVERING THE ORIGINAL BIT DATA STREAM THAT WAS CONVOLUTIONALLY ENCODED AS A CODE SYMBOL STREAM IN A CODE DIVISION MULTIPLE ACCESS (CDMA) MOBILE COMMUNICATION SYSTEM. THE DECODER SIMULTANEOUSLY DECODES AT THE SEVERAL DATA RATES ASSOCIATED WITH CERTAIN MULTIRATE VOCODERS. THE DECODER CAN DECODE AT AN UNKNOWN DATA RATE IN EITHER CONTINUOUS OR FRAMED PACKET MODES. IT ACCOMPLISHES THIS BY SIMULTANEOUSLY DECODING AT MULTIPLE RATES AND BY CREATING ONE OR MORE DATA QUALITY METRICS FOR EACH DECODED DATA PACKET. SPECAIL INPUT AND OUTPUT BUFFERING IS PROVIDED TO ISOLATE THE DECODER FROM SYSTEM TIMING CONSTRAINTS. THE INPUT BUFFER (48) INCLUDES SELECTION AND ACCUMULATION LOGIC TO ORGANIZE CODE SYMBOL DATA INTO THE PACKET ORDER FOR REPEAT MODE OR RANDOM BURST MODE AT LOWER FRAME DATA RATES. DECODED DATA PACKETS FOR EACH OF SEVERAL PREDETERMINED DATA TRANSFER RATES ARE HELD IN AN OUTPUT BUFFER (54) FOR ABOUT HALF OF THE DECODING CYCLE, THEREBY PERMITTING THE SYSTEM MICROPROCESSOR TO EXAMINE AND SELECT THE APPROPRIATE DECODED DATA PACKET. THE DECODER (50) ALSO CAN BE RECONFIGURED TO OPERATE AT ANY ONE OF SEVERAL PREDETERMINED CONVOLUTIONAL ENCODING ALGORITHMS. THE VITERBI DECODER (50), IMPLEMENTED AS A SINGLE MONOLITHIC INTEGRATED CIRCUIT, CAN BE USED IN ANY AND ALL OF MANY DIFFERENT MULTIUSER TELECOMMUNICATIONS CHANNELS.FIGURE 5

公开(公告)号：ZA9203193B

公开(公告)日：1993-04-28

申请号：ZA9203193

申请日：1992-04-30

Applicant: QUALCOMM INC

Inventor： WOLF JACK KEIL ,  JACK KEIL WOLF

IPC: H03M13/25 ,  H03M13/41 ,  H04L27/18 ,  H03M ,  H04L

CPC classification number: H03M13/256 ,  H03M13/25 ,  H03M13/41 ,  H04L27/186