共被期刊论文引用了4次
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| 1 | 具有频谱可控特性的直扩系统规避窄带干扰技术显示文摘根据不同的m-W复合序列具有频谱跳变的特点,提出了一种在直扩通信中对窄带干扰进行规避的方法。该方法通过改变m序列、Walsh序列的周期和Walsh函数序列的序数可以使直扩信号具有频谱可控的特性,从而使窄带干扰所在频段的信号能量较少,降低干扰对信号的影响。仿真结果表明,对于单频和窄带干扰,在信噪比一定的情况下,采用规避方式的误码率可比常规直扩方式提高1至2个数量级。 | 付江志 郭黎利 杨红乔 | 2011 | 系统工程与电子技术2011，33，6： | 9 |
| 2 | 卫星扩频通信中一种窄带干扰抑制的组合方案显示文摘针对基于OQPSK调制的卫星扩频通信系统,研究了一种基于重叠加窗DFT的窄带干扰抑制技术.对满足条件的若干窗函数分别进行了仿真,并详细分析了其性能与旁瓣特性的内在联系.从有效性与实现复杂度上分析了最新的几种变换域处理算法,如CME、预切除算法与FCME等,对它们的性能进行了仿真和比较.最后得到了Hann窗与预切除算法相结合的干扰抑制方案.结果表明,与传统的Capozza方案相比,该方案能有效提高系统的误码性能,约5dB. | 黄国胜 易争荣 朱振才 | 2010 | 中国科学院研究生院学报2010，27，5： | 4 |
| 3 | 变换域通信系统自适应N-sigma幅度谱成型算法显示文摘针对变换域通信系统传统硬门限判决算法漏检和误检的问题,为提高系统的抗干扰性能,提出一种自适应N-sigma幅度谱成型算法。该算法通过频谱感知获得环境功率谱的幅值信息,计算环境功率谱的均值和标准差;根据正态分布相关理论,自适应设置门限。若电磁环境发生变化,均值和标准差会重新调整更新门限。仿真结果表明,相比传统的硬门限判决算法,自适应N-sigma幅度谱成型算法的门限设置更加灵活精确,降低了干扰的漏检概率和误检概率,提高了系统的抗干扰性能。 | 刘立 张衡阳 毛玉泉 孙乐 马丽华 | 2016 | 计算机应用2016，36，6： | 4 |
| 4 | Adaptive median threshold algorithm used in FDIS of DSSS receivers显示文摘For direct sequence spread spectrum(DSSS) receivers, the capability of rejecting narrow-band interference can be significantly improved by a process of frequency-domain interference suppression(FDIS).The key issue of this process is how to determine a threshold to eliminate interference in the frequency domain,which has been extensively studied.However,these previous methods are tedious or very complex.A simple and efficient algorithm based on medians is proposed.The elimination threshold is only related to the median by a scale factor,which can be obtained by the numerical analysis.Simulation results show that the algorithm provides excellent narrow-band interference suppression while only slightly degrading the signal-to-noise ratio(SNR).A one-pass algorithm using logarithmic segmentation is further derived to estimate medians with low computational complexity. Finally,the FDIS is implemented in a field programmable gate array(FPGA) of Xilinx.Experiments are carried out by connecting the FDIS FPGA to a DSSS receiver,and the results show that the receiver has an effective countermeasure for a 60 dB interference-to-signal ratio(ISR). | Weijun Yang Chaojie Zhang Xiaojun Jin Zhonghe Jin Tieshan Yuan | 2013 | Journal of Systems Engineering and Electronics2013，24，1： | 1 |
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