LTE中Turbo码内部交织器的研究

Study of the Internal Interleaver of LTE Turbo Codes

为了实现高速并行译码,LTE Turbo码采用QPP交织器。研究了QPP交织器的最大无争用特性,该特性使得LTE Turbo码译码器设计灵活,运算复杂度较低。仿真表明,与串行译码相比,并行译码损失了少量译码性能,显著提高了译码效率;在相同条件下,由于采用QPP交织器,LTE的译码性能优于HSPA。

In order to achieve high-speed parallel decoding, LTE Turbo codes use QPP interleaver. This paper studies the characteristics of maximum contention-free of QPP interleaver, which provides the LTE Turbo decoder with flexibility of design and low computing complexity. Studies have shown that, compared to the serial decoding, the parallel decoding significantly improves the decoding efficiency with a small decoding performance loss. And under the same conditions, the performance of LTE Turbo decoding is better than that of HSPA owing to QPP interleaver.