摘要
为提高通信的频谱效率,减少无线信道上衰落对于通信系统的不利影响,提出基于LDPC编码的MIMO-OFDM系统的设计,并对其进行优化。提出的方案可以支持峰值速率约为100 Mbps且带宽超过25 MHz的信道。在中断MIMO OFDM信道中,优化的LDPC码在可减少接收机迭代次数和接收机复杂度。此外,基于低复杂度的LMMSE-SIC解调器的接收机性能损失比基于APP的小1dB,故LMMSE-SIC解调器性能优异,适合实际应用。
To improve communication spectrum efficiency and reduce the adverse effect of fading, an MIMO-OFDM system based on LDPC cedes was designed and optimized. The proposed scheme can support ~ 100 Mbps peak rate over 25 MHz bandwidth channels. The benefit of optimizing LDPC codes is to help reduce the number of receiver iterations hence the receiver complexity in the outage MIMO OFDM channels. Furthermore, compared to the performance when employing the APP demodulator, the use of the LMMSE-SIC demodulator brings less than l dB performance loss. Hence, LMMSE-SIC demodulator appears to be a promising choice in practical implementation, for its good performance and relatively low complexity.
出处
《世界科技研究与发展》
CSCD
2012年第6期931-934,共4页
World Sci-Tech R&D
