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1. 发明申请

WO03001731A8 COOPERATIVE CODE-ENHANCED MULTI-USER COMMUNICATIONS SYSTEM 审中-公开
标题翻译：合作增强型多用户通信系统
公开(公告)号：WO03001731A8
公开(公告)日：2003-07-24
申请号：PCT/US0219828
申请日：2002-06-21
申请人： BAE SYSTEMS INFORMATION
发明人： BARTLETT ALAN M , CHAN ALAN
IPC分类号： H04L1/00 , H04L5/02 , H04L27/38 , H04L5/00
CPC分类号： H04L5/02 , H04B1/7105 , H04L1/0048 , H04L1/0054 , H04L27/38
摘要： A cooperative code-multiuser communications system having a receiver (16) for solving user ambiguity in a received composite signal by using convolutional encoder (151, 152, ... 15k) state machine properties to analyze strings of bit sums and separate out individual user data. The receiver (16) comprises a signal sampler (26) which converts a received composite signal to a digital data. A single point cluster mapper (28) determines a closest pseudo-constellation point, and the pseudo-constellation point is formed with the aid of power and timing control in the transmitter (1). A bit sum look-up table (32) maps symbol points to bit sums. A deterministic loop tests for bit sum cases where symbols can be determined immediately. A guess loop tests the bit sum after the deterministic loop test and performs guesses until all bits are decided. The bit sum (58) is provided to a multiuser convolutional decoder (36) to decide all user data streams.
摘要翻译：一种协作代码多用户通信系统，具有接收机（16），用于通过使用卷积编码器（151,152，... 15k）状态机特性来解决接收的复合信号中的用户模糊度，以分析位和的串并分离出各个用户数据。接收器（16）包括信号采样器（26），其将接收到的复合信号转换成数字数据。单点集群映射器（28）确定最近的伪星座点，并且借助于发射机（1）中的功率和定时控制形成伪星座点。位和查找表（32）将符号点映射到位和。对于可以立即确定符号的位和情况的确定性循环测试。猜测循环测试确定性循环测试后的位和，并执行猜测，直到所有位决定为止。比特和（58）被提供给多用户卷积解码器（36）以决定所有用户数据流。

2. 发明申请

WO03001447A8 REDUCED ALGORITHM RECEIVER 审中-公开
标题翻译：减少算法接收器
公开(公告)号：WO03001447A8
公开(公告)日：2004-02-05
申请号：PCT/US0219755
申请日：2002-06-21
申请人： BAE SYSTEMS INFORMATION
发明人： CHAN ALLAN , BARTLETT ALAN M
IPC分类号： H04L1/00 , H03D1/00 , H04L27/06
CPC分类号： H04L1/0059 , H04B1/7105 , H04L1/0048 , H04L1/0054
摘要： A code enhanced, multi-user detection, reduced algorithm receiver in a multiuser communication system reduces the signal processing requirements by limiting the number of searches between consecutive symbol cycles using information from an encoder state diagram. The receiver makes use of a convolutional encoder's state machine properties to mark possible transitions as invalid based on the current state of the multiple users' encoders, thus removing them from the search tree. The reduced algorithm receiver (14) comprise a signal sampler (18) for converting a single composite waveform signal (Rx) to digitized composite signal (DRx), a parameter estimator for determining waveform characteristics of each of the multiple users, a memory for storing predetermined training sequences for each of the users, a next state predictor (24) that reduces the amount of symbols being checked during a current cycle, a waveform approximator that receives the user waveform characteristics data and a set of possible bits from the next state predictor (24) and attempts to simulate modulation of the individual user signal, a demodulator for comparing the set of possible composite waveforms ( Tx) from the waveforms approximator to the digitized composite waveforms (DRx) and determining the best match waveform, and a convolutional decoder (26) for receiving the best match symbols and decoding them for each of the users.
摘要翻译：多用户通信系统中的代码增强型多用户检测减少算法接收器通过使用来自编码器状态图的信息来限制连续符号周期之间的搜索次数来减少信号处理要求。接收机利用卷积编码器的状态机属性，根据多用户编码器的当前状态将可能的转换标记为无效，从而将其从搜索树中删除。缩减算法接收器（14）包括用于将单个复合波形信号（Rx）转换为数字化复合信号（DRx）的信号采样器（18），用于确定多个用户中的每一个的波形特性的参数估计器，用于存储用于每个用户的预定训练序列，减少在当前周期期间被检查的符号量的下一状态预测器（24），从下一状态预测器接收用户波形特征数据和一组可能比特的波形近似器（24），并尝试模拟各个用户信号的调制;解调器，用于将来自波形近似器的一组可能的复合波形（<〜> Tx）与数字化复合波形（DRx）进行比较，并确定最佳匹配波形，以及卷积解码器（26），用于接收最佳匹配符号并为每个用户解码它们。

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