摘要
首先建立MB-OFDM信号系统仿真模型,将信号分为3个子带,采用卷积编码与未加编码交织时,在标准的IEEE802.15UWB信道模型下,通过仿真获得误比特率性能,结果验证了系统模型的正确性;然后对MB-OFDM信号在单音干扰、多音干扰和部分频带干扰条件下进行了性能仿真。仿真结果表明:卷积编码交织后的系统性能在多数情况下较未编码交织时的性能要好;编码码率越低,MB-OFDM信号的误比特率性能就越强;并且MB-OFDM信号抗单音干扰的能力最强。
Firstly, MB-OFDM system model was build, and its signals were divided into 3 subbands. For the two conditions, coded by convolutional codes and the one uncoded and uninterleaved, the bit error rate of MB-OFDM on the IEEE 802,15 UWB channel models was showed and validated through the simulation, and. then the jam resistance performance was quantized in the presence of tone, multiton and partial-band interference or jamming, The results indicate that the performance of convolutional coded and interleaved system is better than the one uncoded and uninterleaved in most cases. The smaller of the code rate, but the better of the performance; in addition, as it is affected by tone interference, the jam resistance performance of MB-OFDM signal is the best.
出处
《系统仿真学报》
EI
CAS
CSCD
北大核心
2008年第1期120-123,共4页
Journal of System Simulation
基金
国防预研基金项目(51421010504JB3801)
