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首页> 外文期刊>IEEE transactions on wireless communications >Rate-Distortion Optimized Video Transmission Over DS-CDMA Channels with Auxiliary Vector Filter Single-User Multirate Detection
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Rate-Distortion Optimized Video Transmission Over DS-CDMA Channels with Auxiliary Vector Filter Single-User Multirate Detection

机译：带有辅助矢量滤波器单用户多速率检测的DS-CDMA信道上速率失真优化的视频传输

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摘要

In this paper, we consider the rate-distortion optimized resource allocation for video transmission over multi-rate wireless direct-sequence code-division-multiple-access (DS-CDMA) channels. We consider the performance of transmitting scalable video over a multipath Rayleigh fading channel via a combination of multi-code multirate CDMA and variable sequence length multirate CDMA channel system. At the receiver, despreading is done using adaptive space-time auxiliary-vector (AV) filters. We propose a new interference cancelling design that uses just a single AV filter for single-user mutirate despreading. Our experimental results show that the proposed interference cancelling design has excellent performance in scalable video transmission over DS-CDMA systems that use a combination of multicode multirate and variable processing gain multirate CDMA. The proposed design takes advantage of the fact that single user's video data is transmitted using two spreading codes, one for the base layer and one for the enhancement layers, and of the fact that these spreading codes can have different processing gains. The proposed interference cancelling design is compared with two conventional single-user multirate CDMA receiver configurations, however now we use an AV filter rather than a simple matched filter. We also propose a resource allocation algorithm for the optimal determination of source coding rate, channel coding rate and processing gain for each scalable layer, in order to minimize the expected distortion at the receiver.
机译：在本文中，我们考虑了速率失真优化的资源分配，以用于在多速率无线直接序列码分多址（DS-CDMA）信道上进行视频传输。我们考虑了通过结合多码多速率CDMA和可变序列长度多速率CDMA信道系统在多径瑞利衰落信道上传输可伸缩视频的性能。在接收机处，使用自适应时空辅助矢量（AV）滤波器进行解扩。我们提出了一种新的干扰消除设计，该设计仅使用单个AV滤波器进行单用户多方解扩。我们的实验结果表明，所提出的干扰消除设计在结合多码多速率和可变处理增益多速率CDMA的DS-CDMA系统上的可伸缩视频传输中具有出色的性能。所提出的设计利用以下事实：使用两个扩展码来传输单个用户的视频数据，一个用于基础层，一个用于增强层，并且这些扩展码可以具有不同的处理增益。拟议的干扰消除设计与两种传统的单用户多速率CDMA接收机配置进行了比较，但是现在我们使用AV滤波器而不是简单的匹配滤波器。我们还提出了一种资源分配算法，用于针对每个可伸缩层的源编码率，信道编码率和处理增益的最佳确定，以便将接收器的预期失真降至最低。

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