基于双序列跳频的抗干扰通信方法

Anti-jamming Method of Communication Based on Binary-sequence Frequency Hopping

针对常规跳频受跟踪干扰威胁和差分跳频受部分频带干扰威胁的现状,提出了基于双序列跳频的抗干扰通信方法。该方法的数据信道和对偶信道按各自的跳频序列进行跳变,干扰方无法准确跟踪对偶信道,抑制了跟踪干扰的影响。接收机采用窄带接收可以滤除带外干扰,使得系统同时兼具较好的抗部分频带干扰能力。仿真验证结果表明,随着莱斯因子的增加,BSFH的误码率显著降低;最坏跟踪干扰下BSFH比FH/BFSK有5~10 dB的性能增益,部分频带干扰下,误码率达到10-3时,BSFH所需的信干比比DFH低10~12 dB。

Aiming at the problems that the conventional frequency hopping was subject to the follower jamming(FJ) threat and the DFH was affected by the partial band jamming(PBJ), an anti-jamming communication method based on binary-sequence frequency hopping(BSFH) was proposed. The data channel and the complementary channel of BSFH hopped on their respective sequences. The jammer could not track the complementary channel successfully, which suppressed the effect of FJ. The narrow-ban front end was employed in the BSFH receiver, so that the system had better resistance to PBJ at the same time. Simulation results showed that the bit error rate of BSFH was significantly reduced as rice factor was increased.The performance gain of BSFH was improved by 5~10 dB compared with conventional FH under the worst-case FJ. When the bit error rate reaches 10-3, the required signal-to-interference ratio of BSFH was about 10~12 dB lower than differential frequency hopping under PBJ.