公开(公告)号：WO2003001447A3

公开(公告)日：2003-01-03

申请号：PCT/US2002/019755

申请日：2002-06-21

Applicant: BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC.

Inventor： CHAN, Allan ,  BARTLETT, Alan, M.

IPC: H03D1/00

Abstract: 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.

公开(公告)号：WO2003001731A1

公开(公告)日：2003-01-03

申请号：PCT/US2002/019828

申请日：2002-06-21

Applicant: BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION, INC.

Inventor： BARTLETT, Alan, M. ,  CHAN, Alan

IPC: H04L5/00

CPC classification number: H04L5/02 ,  H04B1/7105 ,  H04L1/0048 ,  H04L1/0054 ,  H04L27/38

Abstract: 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.

Abstract translation: 具有用于通过使用卷积编码器（151,152，...，15k）状态机属性来解析所接收的复合信号中的用户歧义的接收器（16）的协作码多用户通信系统 并且分离出个人用户数据。 接收器（16）包括将接收到的复合信号转换为数字数据的信号采样器（26）。 单点群集映射器（28）确定最接近的伪星座点，并且借助于发射机（1）中的功率和定时控制形成伪星座点。 位总和查找表（32）将符号点映射到位总和。 确定性循环测试可以立即确定符号的比特和情况。 猜测循环在确定性循环测试之后测试比特总数，并执行猜测直到所有比特被确定。 比特总和（58）被提供给多用户卷积解码器（36）以决定所有用户数据流。

公开(公告)号：WO2003001447A2

公开(公告)日：2003-01-03

申请号：PCT/US2002/019755

申请日：2002-06-21

Applicant: BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC.

Inventor： CHAN, Allan ,  BARTLETT, Alan, M.

IPC: G06N

CPC classification number: H04L1/0059 ,  H04B1/7105 ,  H04L1/0048 ,  H04L1/0054

Abstract: 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 comprise a Signal Sampler for converting a single composite waveform signal (R x ) to digitized composite signal (DR x ), 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 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 and attempts to simulate modulation of the individual user signal, ad Demodulator for comparing the set of possible composite Waveforms (∼T x ) from the Waveforms Approximator to the digitized composite waveforms (DR x ) and determining the best match waveform, and a Convolutional Decoder for receiving the best match symbols and decoding them for each of the users.

Abstract translation: 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。 还原算法接收机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，用于确定多个用户中的每一个的波形特性的参数估计器，用于存储每个用户的预定训练序列的存储器 用户，下一状态预测器，其减少在当前周期期间被检查的符号量;波形近似器，其接收用户波形特征数据和来自下一状态预测器的一组可能位，并尝试模拟各个用户的调制 信号，广播解调器，用于将来自波形近似器的可能复合波形（SIMILAR Tx）的集合与数字化复合波形（DRx）进行比较，并确定最佳匹配波形，以及卷积解码器，用于接收最佳匹配符号并对其进行解码 的用户。

公开(公告)号：EP1402471A2

公开(公告)日：2004-03-31

申请号：EP02756265.1

申请日：2002-06-21

Applicant: BAE SYSTEMS Information and Electronic Systems Integration, Inc.

Inventor： CHAN, Allan ,  BARTLETT, Alan, M.

IPC: G06N1/00

CPC classification number: H04L1/0059 ,  H04B1/7105 ,  H04L1/0048 ,  H04L1/0054

Abstract: 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.

公开(公告)号：EP1397882A1

公开(公告)日：2004-03-17

申请号：EP02746634.1

申请日：2002-06-21

Applicant: BAE SYSTEMS Information and Electronic Systems Integration, Inc.

Inventor： BARTLETT, Alan, M. ,  CHAN, Alan

IPC: H04L5/00

CPC classification number: H04L5/02 ,  H04B1/7105 ,  H04L1/0048 ,  H04L1/0054 ,  H04L27/38

Abstract: 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.