摘要
快速跳频正交频分复用(FFH-OFDM)将快速跳频图案与常规OFDM技术相结合,在信号发送周期内使数据分时隙在各个子信道进行跳频,并且具有遍历性。在多径引起的频率选择性衰落信道条件下,FFH-OFDM可以通过预编码矩阵有效地将不同子信道的噪声影响平均化,从而有效提高系统误码性能。
FFH -OFDM combines FFH with regular OFDM. The symbols hops in each subehannels in chips during the symbol period. When applied to frequency- selective channels caused by multi - path, FFH -OFDM can average the noise at different subchannels using pre- coding matrix,which makes better performance in bit errors.
出处
《现代电子技术》
2007年第17期9-11,共3页
Modern Electronics Technique