摘要
根据逐级QAM(Quadrature Amplitude Modulation)调制方案提出了广义干扰抵消的思想,并根据STBC(Space-TimeBlock Coding)系统传统的最大似然(ML)译码算法,提出了一种基于逐级解调思想的低复杂度STBC译码方法。在分别采用64QAM和256QAM调制方式下,新的译码算法比传统的ML译码算法的复杂度分别降低了90%和97%以上。同时,用理论和仿真结果证明了该译码方法达到了ML的译码性能。因而,这种新的译码方法在没有性能损失的前提下降低了译码的复杂度。
An idea of generalized interference cancellation was put forward according to the pair-level QAM modulation and a new decoding algorithm for Space-Time Block Coding （STBC） with low complexity was proposed. Adopting 64-QAM and 256-QAM modulation schemes, this algorithm reduced the computation complexity by 90 % and 97 %, respectively. It was shown that the algorithm achieved the same performance as ML decoding algorithm. Thus, this decoding algorithm reduced the decoding complexity without loss of performance.
出处
《无线电通信技术》
2007年第4期31-33,56,共4页
Radio Communications Technology
