摘要： 提出一种应用于多波段正交频分复用(MB-OFDM)超宽带通信系统的维特比解码器的设计方案，分析MB-OFDM所采用的卷积/凿孔码及相应的维特比解码算法的性能。为了达到系统要求的最高数据传输率、保持硬件开销的经济性，结合滑动窗口和折叠2种方法设计解码器的硬件结构。在低速工作模式下，部分处理单元被禁用，以节省功耗。该设计经Xilinx Virtex-4 FPGA验证，最高译码速率可达432 Mb/s。

关键词: 维特比解码器, 多波段正交频分复用, 超宽带

Abstract: This paper presents the design of Viterbi decoder for Multiband OFDM(MB-OFDM) Ultra-Wideband(UWB) communication system. The convolutional/punctured codes and the performance of corresponding Viterbi algorithm are analyzed. To achieve the highest data rate desired with hardware efficiency, a folded sliding block architecture is utilized. Under lower data rates, some Processing Elements(PE) in the Viterbi decoder are disabled to save power. The design has been implemented on FPGA and the throughput can be up to 432 Mb/s on a Xilinx Virtex-4 device.

Key words: Viterbi decoder, Multiband OFDM(MB-OFDM), Ultra-Wideband(UWB)

中图分类号: 

• TP303