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1.发明公开
公开(公告)号：EP0919098A2
公开(公告)日：1999-06-02
申请号：EP98931292.0
申请日：1998-06-16
CPC分类号： H03M13/2707 , H03M13/27 , H03M13/2936 , H03M13/31 , H04L1/0057 , H04L1/0059 , H04L1/0065 , H04L1/0071 , H04L27/2626 , H04L27/2649 , H04N21/2383 , H04N21/4382
摘要： In an orthogonal frequency division multiplexing (OFDM) system (10) which uses an outer Reed-Solomon encoder and interleaver (24) and an inner convolutional encoder (26), after the inner convolutional encoding the data bits are interleaved by an inner interleaver (28), and then grouped into symbols, each symbol having 'm' bits. After grouping, the symbols are mapped to a complex plane using quadrature amplitude modulation (QAM). Thus, bits, not symbols, are interleaved by the inner interleaver (28). A receiver (12) performs a soft decision regarding the value of each bit in each complex QAM symbol received.
摘要翻译： 在使用外部Reed-Solomon编码器和交织器（24）和内部卷积编码器（26）的正交频分复用（OFDM）系统（10）中，在内部卷积编码之后，数据比特被内部交织器 28），然后分组为符号，每个符号具有'm'个比特。 在分组之后，使用正交幅度调制（QAM）将符号映射到复平面。 因此，内部交织器（28）对位而不是符号进行交织。 接收器（12）对接收到的每个复合QAM符号中的每个比特的值执行软判决。
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2.发明授权METHOD AND APPARATUS FOR PROVIDING VARIABLE RATE DATA IN A COMMUNICATIONS SYSTEM USING STATISTICAL MULTIPLEXING 失效方法和设备，用于传输系统交付可变数据速率具有统计多路复用操作
公开(公告)号：EP0823163B1
公开(公告)日：2007-05-30
申请号：EP96913014.5
申请日：1996-04-22
CPC分类号： H04L1/0083 , H04B7/18513 , H04J3/247 , H04J13/00 , H04L1/0014 , H04W72/0486
摘要： The present invention discloses a variable rate transmission system wherein a packet of variable rate data generated by a variable rate data source (20) is modulated on traffic channel by traffic channel modulator (30) if the capacity of said traffic channel is greater than or equal to said data rate of said packet. The packet of variable rate data is modulated onto traffic channel by traffic channel modulator (30) and at least one overflow channel by traffic channel modulator (32) if the capacity of said traffic channel is less than said data rate. The present invention further discloses a receiving system for receiving variable rate data wherein a received packet of variable rate data is received on traffic channel if the capacity of said traffic channel is greater than or equal to a data rate of said packet and wherein a packet of variable rate data is received on traffic channel and at least one overflow channel if the capacity of said traffic channel is less than said data rate.
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公开(公告)号：EP1464121B1
公开(公告)日：2005-09-28
申请号：EP02794135.0
申请日：2002-12-03
发明人： BUTLER, Brian, K. , WOLF, Jack, K. , MILNE, Ryan
CPC分类号： H03M13/6502 , H03M13/1515 , H03M13/19 , H03M13/2909 , H03M13/293 , H03M13/37
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4.发明公开
公开(公告)号：EP0951755A1
公开(公告)日：1999-10-27
申请号：EP97953371.0
申请日：1997-12-19
发明人： WOLF, Jack, K.
CPC分类号： H04L1/0057 , H03M13/29 , H03M13/47 , H04L1/0054 , H04L1/0065 , H04L1/0071 , H04L1/16
摘要： In a concatenated code data, correctly decoded code words from a block decoder is utilized to improve the performance of the convolutional decoder. A code word can sometimes be correctly decoded prior to receipt of all the symbols for the code word. Early decoding of the code word allows for the correct recreation of the entire code word, even the symbols which have not yet been received. The entire corrected code word is used by the convolutional decoder to eliminate branches from the trellis, thus improving decoding of prior data bits and future data bits in the trellis. The chain back distance of the convolutional decoder can also be made shorter based on the knowledge that some of the received code words have been correctly decoded. Finally, the parity symbols which have not yet been received for the correctly decoded code word can be eliminated from transmission to improve the overall transmission rate.
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5.发明授权METHOD AND SYSTEM FOR UTILIZATION OF AN OUTER DECODER IN A BROADCAST SERVICES COMMUNICATION SYSTEM 有权方法和系统对于使用外部解码器在广播服务通信系统
公开(公告)号：EP1421719B1
公开(公告)日：2013-05-22
申请号：EP02757147.0
申请日：2002-08-15
发明人： CHEN, Tao , WOLF, Jack, K. , ODENWALDER, Joseph, P. , TIEDEMANN, Edward, G., Jr. , BUTLER, Brian, K. , WEI, Yongbin
CPC分类号： H03M13/3715 , H03M13/09 , H03M13/2909 , H03M13/293 , H04H20/30 , H04W52/0219 , H04W52/0245 , H04W52/322 , H04W72/005 , Y02D70/1222 , Y02D70/1242
摘要： A Method and System for Utilization of an Outer Decoder in a Broadcast Services Communication System is described. An outer decoder and an inner decoder encode a block of information to be transmitted, to improve protection by adding redundancy. The redundancy permits decoding of the information from less than a complete encoded block of information. Consequently, the receiving station determines when sufficient amount of information for successful decoding has been received, and utilizes the time remaining before the next block of information arrives to perform other activities, e.g., hard handoff on a broadcast channel, inter-frequency hard handoff, and other activities. Alternatively, the receiving station can cease reception, thus decrease power consumption. Furthermore, part of the information block may be utilized for transmission of signaling information.
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6.发明公开
公开(公告)号：EP1210790A2
公开(公告)日：2002-06-05
申请号：EP00953877.8
申请日：2000-08-07
IPC分类号： H04L9/32
CPC分类号： H04L9/0643 , H04L9/3242 , H04L2209/12 , H04L2209/34 , H04L2209/80
摘要： A method for generating a message authentication code (MAC) includes the steps of distributing the bits of a message into a larger message in accordance with a pseudorandom number distribution format. The cyclic redundancy check (CRC) bits of the larger message are computed and used as the MAC for the message. The larger message need not be created. The remainder modulo the CRC polynomial of a polynomial xi, where i is the intended bit position in the 'larger message', is calculated. An exclusive-OR(XOR) operation is performed, bit by bit, on the CRC and the calculated remainder to derive the new CRC.
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7.发明公开METHOD AND APPARATUS FOR PROVIDING VARIABLE RATE DATA IN A COMMUNICATIONS SYSTEM USING STATISTICAL MULTIPLEXING 失效方法和设备，用于传输系统交付可变数据速率具有统计多路复用操作
公开(公告)号：EP0823163A1
公开(公告)日：1998-02-11
申请号：EP96913014.0
申请日：1996-04-22
CPC分类号： H04L1/0083 , H04B7/18513 , H04J3/247 , H04J13/00 , H04L1/0014 , H04W72/0486
摘要： The present invention discloses a variable rate transmission system wherein a packet of variable rate data generated by a variable rate data source (20) is modulated on traffic channel by traffic channel modulator (30) if the capacity of said traffic channel is greater than or equal to said data rate of said packet. The packet of variable rate data is modulated onto traffic channel by traffic channel modulator (30) and at least one overflow channel by traffic channel modulator (32) if the capacity of said traffic channel is less than said data rate. The present invention further discloses a receiving system for receiving variable rate data wherein a received packet of variable rate data is received on traffic channel if the capacity of said traffic channel is greater than or equal to a data rate of said packet and wherein a packet of variable rate data is received on traffic channel and at least one overflow channel if the capacity of said traffic channel is less than said data rate.
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公开(公告)号：EP1464121A2
公开(公告)日：2004-10-06
申请号：EP02794135.0
申请日：2002-12-03
发明人： BUTLER, Brian, K. , WOLF, Jack, K. , MILNE, Ryan
CPC分类号： H03M13/6502 , H03M13/1515 , H03M13/19 , H03M13/2909 , H03M13/293 , H03M13/37
摘要： Techniques for low computation (1) erasure-and-single-error correction block decoding on a received block of symbols previously coded column-wise with an (N, K) linear error correction block code (e.g. a Reed-Solomon code) and row-wise with an error detection code (e.g., a CRC code). Initially, each row of the received block is marked as either an erased row or an un-erased row based on error detection decoding. To perform erasure-and-single-error correction block decoding on the received block, a codeword corresponding to a column of the received block containing an undetected symbol error is initially identified using the error correction code. The location of the symbol error in the codeword is then determined based on a particular block decoding scheme and corresponding to the selected (N, K) block code. The row of the received block containing the symbol error is then marked as an erased row. Block decoding may then be performed for the received block with the newly marked erased row containing the symbol error.
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9.发明公开METHOD AND SYSTEM FOR UTILIZATION OF AN OUTER DECODER IN A BROADCAST SERVICES COMMUNICATION SYSTEM 有权方法和系统对于使用外部解码器在广播服务通信系统
公开(公告)号：EP1421719A2
公开(公告)日：2004-05-26
申请号：EP02757147.0
申请日：2002-08-15
发明人： CHEN, Tao , WOLF, Jack, K. , ODENWALDER, Joseph, P. , TIEDEMANN, Edward, G., Jr. , BUTLER, Brian, K. , WEI, Yongbin
IPC分类号： H04H1/00
CPC分类号： H03M13/3715 , H03M13/09 , H03M13/2909 , H03M13/293 , H04H20/30 , H04W52/0219 , H04W52/0245 , H04W52/322 , H04W72/005 , Y02D70/1222 , Y02D70/1242
摘要： A Method and System for Utilization of an Outer Decoder in a Broadcast Services Communication System is described. An outer decoder and an inner decoder encode a block of information to be transmitted, to improve protection by adding redundancy. The redundancy permits decoding of the information from less than a complete encoded block of information. Consequently, the receiving station determines when sufficient amount of information for successful decoding has been received, and utilizes the time remaining before the next block of information arrives to perform other activities, e.g., hard handoff on a broadcast channel, inter-frequency hard handoff, and other activities. Alternatively, the receiving station can cease reception, thus decrease power consumption. Furthermore, part of the information block may be utilized for transmission of signaling information.
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公开(公告)号：EP0767994B1
公开(公告)日：2003-09-24
申请号：EP95924673.7
申请日：1995-06-22
CPC分类号： H04W16/28 , H04B1/7085 , H04B1/7117 , H04B1/712
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