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A multiple access/self interference canceller receiver for DS-CDMA multiuser detection over fading channels

机译：用于衰落信道上的DS-CDMA多用户检测的多址/自干扰消除器接收机

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摘要

This paper is concerned with the reduction of both self interference due to multipath, and multiuser interference due to multiple access for synchronous DS-CDMA communications over frequency-selective fading channels. The general structure of these detectors consists of a bank of matched filters, a linear transformation that operates on the matched filter outputs, and a set of threshold devices. The goal of the present work is related with a single sensor multiuser detection providing a multiuser+self interference (MUI+SI) cancellation in order to improve the expected behavior of classical schemes. This interference canceller exploits the well known generalized side lobe canceller (GSLC) scheme based on the canonical representation for the desired user linear detector. The orthogonality condition between both components is imposed by the proper design of the blocking matrix in terms of the interference subspace span. Several computer simulations over a multipath scenario support the feasibility of our proposal.
机译：本文关注的是减少频率选择衰落信道上的同步DS-CDMA通信中由于多径引起的自干扰和由于多路访问引起的多用户干扰的减少。这些检测器的总体结构包括一组匹配的滤波器，对匹配的滤波器输出进行操作的线性变换以及一组阈值设备。本工作的目的与单传感器多用户检测有关，该单传感器多用户检测提供了多用户+自干扰（MUI + SI）消除，以改善经典方案的预期性能。该干扰消除器基于对所需用户线性检测器的规范表示，利用众所周知的广义旁瓣消除器（GSLC）方案。通过在干扰子空间跨度方面对分块矩阵进行适当设计，可以强加两个组件之间的正交性条件。在多路径方案中的几种计算机模拟支持了我们建议的可行性。

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