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

SPS：多天线无线系统的具有相关变换的多重描述编码

• 批准号: 0131855
• 负责人: Yucel Altunbasak
• 金额: $ 41.68万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-15 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0131855&HistoricalAwards=false
• 关键词: SPS; Multiple; Description; Coding; Correlating

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

提案#131855Altunbasak，YucelGA 技术研究中心。 Corp - GITA 在通信系统中为多媒体传输提供容错能力且效率降低相对较小的一种有效方法是多重描述编码 (MDC)，它假设发送器和接收器之间存在多个独立通道，每个通道都可能暂时停机或可能遇到突发错误。 通过 MDC，可以生成多个编码流（称为描述）并通过不同的通道进行传输。 在目的地，如果所有流均无差错地接收，则可以以其最高保真度重建信号。 然而，如果仅以可用形式接收到一个或几个描述，接收器仍然可以重建可接受的信号。 迄今为止，所有多描述编码方法均假设发射机和接收机之间采用开关信道模式；每个链路要么被破坏，在这种情况下，传输的符号或数据包完全丢失，要么它正常工作，在这种情况下，数据包的接收没有错误。 该模型适用于互联网传输，但不适用于无线信道。本研究用无线信道模型（如瑞利衰落模型）代替了并行的独立开关信道模型。 通信是通过信道使用多个发射和接收天线来执行的。 对于这些模型，任何接收天线处的信号都是来自每个发射天线的独立衰减的发射信号的叠加。 因此，即使接收器侧的描述完全独立，每个天线处接收到的信号也将包括来自每个描述的一些信息。 这项研究涉及寻找这些通道的最佳多重描述编码策略、这种方案的理论限制以及效率