基于门限估计的直扩通信系统窄带干扰变换域抑制方法
A transform domain technique for suppressing narrowband interference in DS-SS system based on threshold estimation
-
摘要: 该文提出一种基于门限估计的直接序列扩频(DS-SS)通信系统窄带干扰变换域抑制方法。该方法对直扩通信系统接收信号变换域数据的分布特点进行了分析,并采用高斯分布对其作了近似.由于高斯分布的方差即为直扩信号和高斯白噪声方差之和,因此估计出变换域数据的方差,将为频域抑制滤波器的门限设置提供参考。该文采用最大似然比(ML)准则对方差进行了估计,从而实现了频域抑制滤波器的自动门限设制。理论分析和计算机仿真结果均表明,该方法能够有效地抑制直扩通信系统中的窄带干扰。Abstract: This paper proposes a method for narrowband interference suppression in Direct Sequence Spread System(DS-SS). The distribution of the transform domain data is analysed, and it is approximated by Gaussian distribution. The variance of Gaussian distribution is the sum of the variance of the spread spectrum signal and the variance of the noise, so if it; is estimated, it can be used as the threshold in designing the interference suppression filter. Maximum Likelihood (ML) technique is used for estimating the variance to achieve the auto-matic threshold setup. Theoretical analysis and simulation show that this method has good performance in suppressing the narrowband interference in DS-SS.
-
L.B. Milstein, Interference rejection techniques in spread spectrum communication, Proc. IEEE,1988, 76(6), 657-671.[2]J.W. Ketchum, J. G. Proakis, Adaptive algorithns for estimating and suppressing narrow-band interference in PN spread-spectrum systems, IEEE Trans. on Commun., 1982, COM-30(5), 913-924.[3]L.M. Li, L. B. Milstein, Rejection of narrow-band interference in PN spread-spectrum systems using transversal filters, IEEE Trans. on Commun., 1982, COM-30(5), 925-928.[4]R.C. DiPietro, An FFT based technique for suppressing narrow-band interference in PN spread spectrum communication systems, in IEEE 1989 ICASSP, Scotland, May 1989, 1360-1363.[5]C. Carlemalm, H. V. Poor, A. Logothetis, Suppression of multiple narrowband interferers in a spread-spectrum communication system, IEEE J. on Selected Areas in Communications, 2000,SAC-18(8), 1356-1347.[6]J.G. Proakis, Digital Communication, 3rd ed., New York, NY, McGraw-Hill, 1995, 849-852.[7]吴翊,等,应用数理统计,长沙,国防科技大学出版社,1995,29-45. 期刊类型引用(4)
1. 孙长印，刘李延，江帆，姜静. 基于DNN的Sub-6 GHz辅助毫米波网络功率分配算法. 通信学报. 2021(09): 184-193 . 
百度学术2. 孙利，尹鸿坦. 60-GHz网络并行传输中基于顶点多着色的时隙分配算法. 河南师范大学学报(自然科学版). 2016(04): 157-165 . 百度学术3. 杨杰，肖辉军，金兆岩. 基于多维业务的网络代价分布式优化算法. 计算机应用研究. 2014(09): 2820-2823 . 百度学术4. 姚曙光. 基于隐性群体双模分解的并行振荡抑制算法. 科技通报. 2014(10): 178-180 . 百度学术其他类型引用(0)
-
百度学术
计量
- 文章访问数: 2291
- HTML全文浏览量: 107
- PDF下载量: 471
- 被引次数: 4
下载:
