认知OFDM系统中抗窄带干扰的递推式干扰检测和译码

针对授权窄带系统可能对认知OFDM系统造成的窄带干扰,提出了一种抗窄带干扰的递推式干扰检测和译码算法。该算法构造了一种新颖的递推式干扰检测和译码的结构,能够由一个被干扰符号递推出其他被干扰符号,同时对软判决译码所需的干扰功率和噪声功率进行估算。仿真结果表明：该算法无需已知关于干扰和噪声的任何统计信息,就可在很大的干扰功率范围内达到接近最大似然译码的性能。

Recursive interference detection and decoding combat narrow bandinterference in OFDM-based cognitive radio

The nar row band interference in cog nit ive OFDM system pro duced by the licensed narrow bandsystem w as studied. An alg orithm cal led recursiv e interference detect ion and decoding of the narrow -bandinterference w as proposed. The alg orithm conceived a nov el recursive interference detect ion and deco dingst ructure w hich could deduce o ther jammed symbo ls f rom one symbol, and est imated the pow er of interferenceand no ise at the same t ime. T he simulat ion resul ts show that the proposed algorithm can reach theperformance o f the Maximum Likelihoo d decoding in a w ide interference pow er extent w ithout know ingany stat ist ic knowledge about interference and noise.