用于通信系统的干扰对消电路设计与实现

针对通信设备应用的复杂化和对在复杂电磁环境下工作的设备电磁兼容性提出的更高要求,通过分析对消技术的基本原理,提出了一种模拟电路和数字电路相结合的干扰对消技术,并研制出了基于该技术的干扰对消原理样机。对该样机的单机测试和系统联试结果表明,该对消技术具备点频干扰和噪声干扰的抑制能力,对消收敛时间小于100 ms,对消比大于43 dB,适合在窄带通信中应用并可推广到其他领域。该成果正逐步在实际工程中得到运用。

Design and implementation of interference cancellation circuit for communication systems

For the increasingly complicated applications of communication system and higher electromagnetic compatibility requirements for equipment under complex electromagnetic environment,an interference cancellation technology based on the mixed analog and digital circuit is proposed. After the principle analysis,an elementary prototype for interference cancellation is developed and tested. The corresponding experimental results indicate that point frequency and noise interference can be suppressed with a convergence time less than 100 ms and a cancellation ratio greater than 43 dB. The cancellation technology is suitable for narrowband communications and also worth spreading to other areas. It has been applied in practical engineering.