摘要
对于提供语音和数据传输等业务的通信系统来说,采用短帧规则交织器是保证译码实时性和硬件实现低复杂性的一项关键技术.针对短帧Turbo系统提出了一种双螺旋交织算法.该方法采用螺旋读入及螺旋读出的规则映射,获得较大的码字最小距离,改善了码字距离谱,提高了译码性能.仿真结果表明,该算法在相同条件下比常用的规则交织器具有较好的性能.
Short frame interleaver is a key technique for voice and data transmission communication systems to ensure real-time decoding and low complexity of hardware. A novel interleaver, called double-helical interleaver, is proposed in this paper. It improves decoding performance by adopting helical reading and helical readout to get the possibly big minimal-codeword-distance and improve the codeword distance spectrum. Computer simulation results proved that this algorithm has better performances compared with interleavers using other regulations in the same condition.
出处
《应用科技》
CAS
2008年第2期21-24,共4页
Applied Science and Technology
关键词
TURBO码
螺旋交织器
距离谱
Turbo codes
helical interleaver
distance spectrum
