多天线分集Rake MMSE接收机的抗单音干扰性能分析

Performance Analysis of Rake MMSE Receiver Based on Antenna Diversity for Rejecting Single-tone Jamming

军用直扩通信系统在复杂的战场环境下会受到敌方各种干扰的威胁 ,其中尤以单音干扰的影响为甚。分析了一种新型的基于天线分集的空时 Rake MMSE接收机在多径衰落信道条件下的抗单音干扰性能。结果表明 ,该接收机具有优越的抗单音干扰和对抗信道多径衰落的性能。干扰抑制性能受单音干扰功率的影响较小 ,而且当干扰个数远小于接收机系统自由度时 ,仍具有一定的抗多个单音干扰的能力。此外 ,在单音干扰情况下 。

Military direct-sequence communication systems will be threatened by many kinds of hostile jamming, among which single-tone jamming can do the greatest harm to communications. A new space-time Rake MMSE receiver based on antenna diversity is proposed and its performance for rejecting single-tone jamming analyzed in this paper. Numerical results show that this receiver has very good performance against single-tone jamming and multi-path fading. Its performance against jamming is not seriously affected by the power of jamming. And while with many tones existing, the receiver can still attain some performance against jamming as long as the tone number is below the system freedom of receiver. Moreover through only a few receiver antennas this receiver can attain good performance.