基于δ匹配滤波器的扩频码同步门限检测方案  

Spreading Code Synchronization Threshold Detection Scheme Based on δ Matched Filter

作　　者：龙德浩[1] 陈志清[2] 

机构地区：[1]四川大学 [2]成都大学

出　　处：《电讯技术》2014年第3期265-272,共8页Telecommunication Engineering

摘　　要：新近提出的δ相关检测/解扩方案,较经典相关检测/解扩方法在同步条件下其计算量减少了99.61%,抗干扰能力提高了2~3个数量级。然而,广泛应用的经典匹配滤波扩频码同步门限检测方法的计算量太大,抗干扰能力不足,当干扰较强时,难以提供有效同步扩频码序列。为了发挥δ相关检测/解扩方案的潜在抗干扰能力,提出了δ匹配滤波扩频码同步门限检测方案。仿真分析表明,所提方案较经典匹配滤波扩频码同步门限检测方法,计算量减小了99.61%,在输入SNR(-0^-20 dB)+sf256条件下,平均误同步率降低了1~2个数量级。Comparison between the recently-proposed δ correlation detection/despreading scheme and the classical correlation detection/despreading method shows that in synchronous condition, the calculation a-mount is reduced 99. 61% and the anti-jamming ability is increased by 2~3 orders of magnitude. However, the calculation amount of the widely used classical spreading code matched filter synchronization threshold detection method is too large, and the anti-jamming ability is insufficient, when interference is strong, it is difficult to provide effective synchronization spreading code sequence. In order to make the most of potential anti-jamming ability of δ correlation detection /despreading scheme, this paper proposes the δ spreading code matched filter synchronization threshold detection scheme. Simulation and analysis demonstrate that in comparison with the classical matched filtering threshold detection spreading code synchronization method, the calculation amount of the proposed scheme is reduced 99. 61% and the average error synchronization rate is reduced by 1~2 orders of magnitude, in condition of input SNR（-0^-20 dB） ＋sf256.

关 键 词：CDMA系统 δ匹配滤波器 扩频码同步门限检测 抗干扰能力 

分 类 号：TN914.4[电子电信—通信与信息系统] TN911[电子电信—信息与通信工程]