基于跳频通信的短码长Raptor码改进方案

针对跳频通信短码长的特性,提出了一种短码长Raptor码的改进方案,其度平均重量比原方案要小29%,并通过Matlab仿真实验对其在跳频通信中的性能进行了研究. 研究结果表明,改进方案构造的短码长Raptor码与原方案相比,在无干扰环境下误比特率要低62.01 dB,在信噪比为4 dB的宽带干扰环境下误比特率要低30.65 dB. 此改进方案为跳频抗干扰通信提供了一种新的前向纠错编码方案,同时为喷泉码的应用开拓了一个新的领域. 

Improved Scheme for Short-Length Raptor Codes Based on Frequency Hopping Communication

Considering the features of small message size of frequency-hopping (FH) communication, an improved scheme for short-length Raptor codes is proposed in this research. The proposed short-length Raptor codes' average degree weight could be 29% less than original scheme. To investigate the performance of the short-length Raptor codes applied in FH communication, simulations has been done under Matlab environment. The results show that compared with the original scheme, the bit error rate using improved scheme would reduce 62.1 dB under the non-interference environment, while reduce 30.65 dB under broadband-interference environment with 4 dB SNR. The improved scheme provides a new forward error correction (FEC) encoding measure for FH anti-interference communication and it also opens up a new area for the application of fountain codes.