SPS: Multiple Description Coding with Correlating Transforms for Multiple Antenna Wireless Systems

建议#131855 Altunbasak，YucelGA Tech Res. Corp -GIT在通信系统中以相对较小的效率降低为多媒体传输提供差错恢复的一种有效方式是多描述编码（MDC），其假设在发射机和接收机之间存在多个独立信道，每个信道可能暂时停机或可能经历突发差错。 使用MDC，生成多个编码流，称为描述，并在不同的信道上传输。 在目的地，如果所有的流都被无差错地接收，则信号可以以其最高的保真度水平被重构。 然而，如果以可用的形式仅接收到一个或几个描述，则接收器仍然可以重构可接受的信号。 到目前为止，所有的多描述编码方法都假设发射机和接收机之间的通断信道模式;每个链路要么断开，在这种情况下，发送的符号或数据包完全丢失，要么它正常工作，在这种情况下，接收到的数据包没有错误。 该模型适用于Internet传输，但不适用于无线信道，本研究用一个无线信道模型，如Rayleigh衰落模型代替了并行独立on-off信道模型。 使用多个发射和接收天线在信道上执行通信。 利用这些模型，在任何接收天线处的信号是来自每个发射天线的独立衰落的发射信号的叠加。 因此，即使在接收机侧的描述是完全独立的，在每个天线处的接收信号也将包括来自每个描述的一些信息。 这项研究涉及到为这些信道寻找最佳的多描述编码策略，这种方案的理论限制，以及效率

Proposal #131855Altunbasak, YucelGA Tech Res. Corp - GITAn effective way of providing error resilience for multimedia transmission in a communication system with a relatively small reduction in efficiency is multiple description coding (MDC), which assumes the existence of multiple independent channels between the transmitter and receiver, each of which can be temporarily down or can experience burst errors. With MDC several coded streams, called descriptions, are generated and transmitted over different channels. At the destination, if all of the streams are received error free, then the signal can be reconstructed at its highest level of fidelity. However, if only one or a few descriptions are received in a usable form, the receiver can still reconstruct an acceptable signal. All multiple description coding methods to date assume an on-off channel mode between the transmitter and the receiver; each link is either broken, in which case the transmitted symbols, or packets, are lost completely, or it functions properly, in which case the packets are received free of errors. This model is appropriate for Internet transmission, but it is not appropriate for wireless channels.This study replaces the parallel in independent on-off channel model with a wireless channel model, such a Rayleigh fading model. Communication is performed using multiple transmit and received antennas over the channel. With these models the signal at any of the receive antennas is the superposition of the transmitted signals from each transmit antenna independently faded. Therefore, even if the descriptions at the receiver side are completely independent, the received signal at each antenna will include some information from each description. This research involves finding the best multiple description coding strategy for these channels, the theoretical limits of such a scheme, and the efficiency