CAJ | 학술논문

针对窄带强干扰对直扩系统造成的严重影响，给出了变换域干扰抑制技术的实现原理框图；在分析传统N-SIGMA算法和中值滤波算法的基础性，提出了改进的中值滤波算法；最后，使用MATLAB对其干扰抑制能力及抑制前后误码性能进行仿真及比较分析，仿真及分析结果表明改进的中值滤波算法在性能上比传统方法有较大的提高，比N—SIGMA算法硬件实现简单，更具有工程推广价值。
침대착대강간우대직확계통조성적엄중영향，급출료변환역간우억제기술적실현원리광도；재분석전통N-SIGMA산법화중치려파산법적기출성，제출료개진적중치려파산법；최후，사용MATLAB대기간우억제능력급억제전후오마성능진행방진급비교분석，방진급분석결과표명개진적중치려파산법재성능상비전통방법유교대적제고，비N—SIGMA산법경건실현간단，경구유공정추엄개치。
Aiming at the serious effect of narrow-band strong interference on DSSS system, the transform-domain interference suppression diagram is presented, and then an improved median filter algorithm is proposed based on analysis of N-SIGMA and traditional median filter algorithms. The capability of narrow-band interference suppression and BER performance of several algorithms are simulated and comparatively analyzed by MATLAB. The results of simulation and analysis show that improved median filter algorithm can improve significantly the performance of narrow-band interference suppression, compared with traditional algorithm, and be easier than N-SIGMA algorithm.