摘要
4D-8PSK-TCM是空间数据咨询委员会（CCSDS）针对SFCG在EESS 8 025~8 400 MHz频带调制的空间条件下,给出的高效率编码调制标准。针对CCSDS提出的4D-8PSK TCM标准,研究了低复杂度的译码算法和实现方法。根据设计的译码算法,用C＋＋实现了对4个谱效率（2.00 bits/symbol,2.25 bits/symbol,2.50 bits/symbol,2.75 bits/symbol）的软件仿真,并用FPGA进行了硬件实现。通过软件仿真结果,对其进行了性能的分析,发现在不损失编码增益的前提下,采用＂辅助网格＂这种低复杂度的译码算法可实现快速高效译码。通过硬件实现可以知道本方案也具有较大的资源开销。
4D-8PSKTCM is the standard of highly efficiencient modulation scheme recommended by CCSDS for the applications within 8 025 ~ 8 400 MHz.And a low-complexity decoding method is proposed for the recommended coding scheme above. According to the decoding algorithm designed,the software and hardware simulationshave been implementedwith C ＋ ＋ and FPGA separately for the four spectral efficiency（ 2.00,2.25,2.50 and 2.75 bits / symbol）.Then an analysis on the BER performance is given.From the simulation results,we can see that this low-complexity decoding method,known as＂auxiliary trellis＂,can greatly reduce the number of comparing units,thus leading to efficient decoding,while this algorithm has high resource consumption.
出处
《无线电通信技术》
2016年第3期14-17,共4页
Radio Communications Technology
