【摘要】 Turbo码编解码中交织器设计的好坏影响整个通信系统性能,在设计交织器时如何使码字更接近随机序列是交织器设计的关键。对几种常用交织器的实现方法进行比较,采用固定交织方法,以奇偶交织为基础,提出螺旋奇偶交织方案,在FPGA上用查找表的方法实现了螺旋奇偶交织器的设计。仿真与实验结果表明,采用螺旋交织器的好处在于该交织器的交织和解交织序列相同,可以分时使用交织器与解交织器,大大节省硬件资源。更多还原

【Abstract】 The interleaver in turbo codes influences the performance of the whole system. The key is the codes design to approach random sequence. The available interleaving methods were compared and the odd-even helix interleave was presented based on fixed interleaving. The helix odd-even interleaver was implemented with FPGA. Compared with pseudorandom method, the method can be implemented with hardware easily. It is indicated that the interleaving and deinterleaving sequences are identical.更多还原