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1. 发明授权

US07203894B2 Method of estimating reliability of decoded message bits 失效
标题翻译：估计解码消息位可靠性的方法
公开(公告)号：US07203894B2
公开(公告)日：2007-04-10
申请号：US10847285
申请日：2004-05-18
申请人： Ju Yan Pan , Chang Qing Xu , Masayuki Tomisawa
发明人： Ju Yan Pan , Chang Qing Xu , Masayuki Tomisawa
IPC分类号： H03M13/41
CPC分类号： H04L1/0054 , H03M13/01
摘要： A method of estimating the reliability of decoded message bits in a digital communications system is proposed. Message and tail bits are coded and transmitted across a communications channel. The coded message and tail bits are then decoded and it is determined that the decoded message bits have no error when the decoded tail bits have at least one error.
摘要翻译：提出了一种在数字通信系统中估计解码消息比特的可靠性的方法。消息和尾比特被编码并通过通信信道传输。然后对编码消息和尾比特进行解码，并且当解码的尾比特具有至少一个错误时，确定解码的消息比特没有错误。

2. 发明授权

US07099405B2 Communication systems with hybrid automatic repeat requests (HARQ) and rate matching 有权
标题翻译：具有混合自动重传请求（HARQ）和速率匹配的通信系统
公开(公告)号：US07099405B2
公开(公告)日：2006-08-29
申请号：US10193146
申请日：2002-07-12
申请人： Chang Qing Xu , Ju Yan Pan , Hiroshi Katsuragawa
发明人： Chang Qing Xu , Ju Yan Pan , Hiroshi Katsuragawa
IPC分类号： H03K9/00
CPC分类号： H04L1/1816 , H04L1/0068 , H04L1/08 , H04L1/1819 , H04L1/1845
摘要： A receiver for a HARQ communication system includes a buffer for storing a signal derived from a message. The signal is transmitted to the receiver at a first coding rate. The receiver also includes a decoder which accepts signals having a second coding rate, and a rate dematcher which converts signals from the first coding rate to the second coding rate. The rate dematcher is arranged to process either a combination of the received signals (in the case that the received signals are noisy versions of identical signals transmitted within the communications network) or simply the set of received signals. In either case, the dematcher forwards the results to the decoder. Provided that the second coding rate is lower than the first coding rate, the amount of memory required by the buffer is reduced by locating the buffer before the rate dematching unit.
摘要翻译：用于HARQ通信系统的接收机包括用于存储从消息导出的信号的缓冲器。该信号以第一编码速率被发送到接收机。接收机还包括接收具有第二编码率的信号的解码器和将信号从第一编码率转换为第二编码率的速率去除器。速率扫描器被设置为处理接收信号的组合（在接收信号是在通信网络内传输的相同信号的噪声版本的情况下）或简单地接收的信号集合。在任一种情况下，解映射器将结果转发到解码器。如果第二编码率低于第一编码率，则通过在缓存器之前定位缓存器来减少缓冲器所需的存储器量。

3. 发明授权

US07210089B2 Communication system employing turbo codes and a hybrid automatic repeat request scheme 有权
标题翻译：采用turbo码的通信系统和混合自动重传请求方案
公开(公告)号：US07210089B2
公开(公告)日：2007-04-24
申请号：US10193144
申请日：2002-07-12
申请人： Chang Qing Xu , Ju Yan Pan , Hiroshi Katsuragawa
发明人： Chang Qing Xu , Ju Yan Pan , Hiroshi Katsuragawa
IPC分类号： H03M13/00 , H04L1/18
CPC分类号： H04L1/005 , H03M13/27 , H03M13/2957 , H03M13/35 , H03M13/6306 , H03M13/6362 , H04L1/0069 , H04L1/1819
摘要： A communications system employs a HARQ method and, for at least some transmission formats, incremental redundancy (IR) signals. For such formats, the multiple IR signals are derived from a single turbo encoded signal by forming multiple permutations of the encoded signal. The permutations are then converted to the coding rate of the selected transmission format. It is demonstrated by simulation that the present proposal achieves a better performance than the known HARQ techniques, while its implementation is simpler. For certain transmission formats, the transmitted signal in response to a retransmission request is identical to the first transmitted signal.
摘要翻译：通信系统采用HARQ方法，并且对于至少一些传输格式，采用增量冗余（IR）信号。对于这种格式，多个IR信号通过形成编码信号的多个排列从单个turbo编码信号导出。然后将排列转换为所选传输格式的编码速率。通过仿真证明，本发明的方案比已知的HARQ技术具有更好的性能，而其实现更简单。对于某些传输格式，响应于重发请求的发射信号与第一个传输信号相同。

4. 发明授权

US07103117B2 Reduced-complexity multipath interference cancellation 失效
公开(公告)号：US07103117B2
公开(公告)日：2006-09-05
申请号：US10195500
申请日：2002-07-16
申请人： Chang Qing Xu , Ju Yan Pan , Hiroshi Katsuragawa
发明人： Chang Qing Xu , Ju Yan Pan , Hiroshi Katsuragawa
IPC分类号： H03D1/04
CPC分类号： H04B1/1081
摘要： Multipath interference in a received wireless signal is cancelled by generating an estimated duplicate of the interference and subtracting it from the received signal. The interference duplication is performed in a truncated manner, based on a determination of which multipath signals are present, so as to reduce the complexity and processing requirement of the interference duplication. In particular, the present invention proposed that the truncation is based on a determination of which multipath signals are present, and the properties of those signals. In a first case, the truncation is that only interference between selected pairs of paths are cancelled in MPIC. In a second case, for given pairs of paths cancellation is only performed for a subset of the chips in which the corresponding two paths can cause interference.

5. 发明授权

US07237177B2 Method of calculating internal signals for use in a map algorithm 有权
标题翻译：计算用于地图算法的内部信号的方法
公开(公告)号：US07237177B2
公开(公告)日：2007-06-26
申请号：US10727910
申请日：2003-12-04
申请人： Ju Yan Pan , Hiroshi Katsuragawa
发明人： Ju Yan Pan , Hiroshi Katsuragawa
IPC分类号： G11C29/00
CPC分类号： H03M13/3905 , H03M13/6583
摘要： A method of calculating internal signals for use in a MAP algorithm is disclosed, comprising the steps of: obtaining first decoding signals by processing received systematic and received encoded symbols of each symbol sequence of a received signal; obtaining unnormalized second decoding signals for the current symbol sequence by processing the first decoding signals of the previous sequence and second decoding signals of the previous sequence; obtaining unnormalized third decoding signals for the current symbol sequence by processing the first decoding signals of the current sequence and third decoding signals of the next sequence; normalizing the unnormalized second and third decoding signals; and wherein at least one of said second decoding signals of the previous sequence and said third decoding signals of the next sequence are unnormalised.
摘要翻译：公开了一种计算用于MAP算法的内部信号的方法，包括以下步骤：通过处理接收信号的每个符号序列的接收的系统和接收的编码符号来获得第一解码信号; 通过处理先前序列的第一解码信号和先前序列的第二解码信号，获得当前符号序列的非归一化第二解码信号; 通过处理当前序列的第一解码信号和下一个序列的第三解码信号，获得当前符号序列的非标准化第三解码信号; 归一化非规范化的第二和第三解码信号; 并且其中所述先前序列的所述第二解码信号和所述下一个序列的所述第三解码信号中的至少一个未被归一化。

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