公开(公告)号：US20130215955A1

公开(公告)日：2013-08-22

申请号：US13735943

申请日：2013-01-07

Applicant: STMicroelectronics S.r.l. ,  The Regents of the University of California

Inventor： Massimiliano SITI ,  Michael P. FITZ

IPC: H04L25/06

CPC classification number: H04L25/06 ,  H04L1/0052 ,  H04L1/0054 ,  H04L1/06 ,  H04L25/03292 ,  H04L25/03331 ,  H04L2025/03414

Abstract: A method, apparatus, and computer program for detecting sequences of digitally modulated symbols transmitted by multiple sources are provided. A real-domain representation that separately treats in-phase and quadrature components of a received vector, channel gains, and a transmitted vector transmitted by the multiple sources is determined. The real-domain representation is processed to obtain a triangular matrix. In addition, at least one of the following is performed: (i) hard decision detection of a transmitted sequence and demapping of corresponding bits based on a reduced complexity search of a number of transmit sequences, and (ii) generation of bit soft-output values based on the reduced complexity search of the number of transmit sequences. The reduced complexity search is based on the triangular matrix.

Abstract translation: 提供了一种用于检测由多个源发送的数字调制符号的序列的方法，装置和计算机程序。 确定分别处理接收矢量的同相和正交分量，信道增益和由多个源发送的发射矢量的真实域表示。 处理真实域表示以获得三角矩阵。 另外，执行以下中的至少一个：（i）基于多个发送序列的降低的复杂度搜索，发送序列的硬判决检测和相应比特的解映射，以及（ii）产生位软输出 基于传输序列数量的复杂度降低的搜索值。 降低的复杂度搜索基于三角矩阵。

公开(公告)号：US20130272462A1

公开(公告)日：2013-10-17

申请号：US13873081

申请日：2013-04-29

Applicant: STMicroelectronics S.r.l.

Inventor： Massimiliano SITI ,  Alessandro TOMASONI ,  Marco FERRARI ,  Sandro BELLINI ,  Oscar VOLPATTI

IPC: H04L1/00

CPC classification number: H04L1/0055 ,  H04B7/0413 ,  H04L1/005 ,  H04L1/0064 ,  H04L1/0656 ,  H04L25/03171 ,  H04L25/03292 ,  H04L25/03331 ,  H04L25/03891 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: An embodiment of an arrangement detects sequences of digitally modulated symbols from multiple sources. The arrangement identifies a suitable set of candidate values for at least one transmitted sequence of symbols and determines for each candidate value a set of sequences of transmitted symbols. The arrangement estimates at least one further set of sequences of transmitted symbols, calculates a metric for each sequence of transmitted symbols, and selects the sequence that maximizes the metric. At the end, a-posteriori bit soft output information for the selected sequence is calculated from the metrics for said sequences. Generally, these calculations are based on the information coming from a channel-state-information matrix and a-priori information on the modulated symbols from a second module, such as a forward error-correction-code (ECC) decoder.

Abstract translation: 布置的实施例检测来自多个源的数字调制符号的序列。 该装置为至少一个发送的符号序列识别适当的一组候选值，并且为每个候选值确定一组发送符号的序列。 该装置估计至少一组另外的发送符号序列集合，计算发送符号的每个序列的度量，并选择使度量最大化的序列。 最后，从所述序列的度量计算所选序列的后验位软输出信息。 通常，这些计算基于来自信道状态信息矩阵的信息和来自第二模块（诸如前向纠错码（ECC））解码器的调制符号的先验信息。