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文章简要介绍了UHF频段在军事卫星通信中的应用特点,提出一种UHF频段极低速率通信信号合成方案。针对合并过程中信道产生的随机相位偏移,采用相位搜索的方法对相移进行补偿。仿真结果表明,提出的合成方案能够有效工作,误码性能接近单路传输的理论水平,并且随着合并次数及相位搜索补偿次数的增多,性能越好,但复杂度会有所提高。
In this paper, the application characteristics of UHF band in military satellite communication are briefly introduced, and a synthesis scheme of very low rate communication signal in UHF band is proposed. Aiming at the random phase offset generated by the channel in the combining process, the phase shift is compensated by the method of phase search. The simulation results show that the proposed scheme can work effectively and the BER performance approaches the theoretical level of single channel transmission. The better the performance, the better the complexity will be with the increase of the number of combined and phase search compensation.