摘要
基于Turbo喷泉码和小波包分形调制技术,提出一种新的异步广播通信系统FPGA实现方案。系统用并行信源信道Turbo喷泉码实现无损数据压缩和纠错,小波包调制实现发送信号时频图样的自由铺砌。系统可以同时实现接收机的异步接入、单向信道下数据的可靠分发及信源信道联合编码,仿真表明该系统相对普通信源信道编码调制有较大性能改善。
Based on source-channel Turbo fountain code and wavelet-packet modulation, this paper proposes a new joint source- channel coding modulation system for asynchronous broadcast. We introduce an appropriate system model and present a realization for a joint source-fountain coding by applying the capacity approaching, parallel concatenated turbo codes and db32 wavelet packet mod- ulation. The system combines lossless data compression as well as reliable broadcast and asynchronous data access. Simulation shows that the system outperforms a separated scheme composed of source coding and subsequent fountain coding.
出处
《微计算机信息》
北大核心
2007年第03X期169-171,共3页
Control & Automation
基金
空间微波国家重点实验室武器装备预研基金(51473030105JB3201)
