1) DS signal
直扩信号
1.
The cyclostationary property of multipath DS signals is analyzed,the expressions of both the cyclic correlation function and cyclic spectrum are deduced,and a novel parameter estimation algorithm of DS signals is presented based on cyclic spectrum amplitude.
分析了多径直扩信号的循环平稳特性,推导了其循环相关函数和循环谱表达式。
2.
DS signal is a second order cyclostationary signal.
直扩信号是二阶循环平稳信号,根据谱相关分析方法,利用直扩信号非零循环频率处的谱线特征,可将直扩信号从噪声背景中检测出来。
3.
Based on this theory, the paper puts forward the DS signal detection method in non-cooperative communication.
基于该理论,提出了非协作通信中直扩信号检测方法,最后利用MATLAB工具对该方法进行仿真,验证了其可行性。
2) DSSS signal
直扩信号
1.
One is the detection of low SNR DSSS signal and extraction of length of PN code, the other is detection of BPSK signal from multi signals.
对直扩信号侦测的计算机模拟结果表明，该方法不仅能检测到低信噪比的此类信号，而且能提取到扩频码周期等参数。
2.
A method of DSSS signal detect quickly in lower S/N is presented in this paper.
同时该方法还可以较为准确地估计出直扩信号的伪码周期。
3.
Based on the periodicity of DSSS signal’s short-time Fourier spectrum,this paper proposed a detection method of DSSS signal based on short-time Fourier transform(STFT)--periodical variance threshold searching method of periodical pulse.
该文利用直扩信号短时傅里叶谱的周期性,提出了基于短时傅里叶变换的直扩信号检测方法———周期脉冲的周期方差门限搜索法,并提出利用三阶累积量滤波器和非相干积累方法以进一步改进检测性能。
4) direct sequence spread spectrum signal
直扩信号
1.
In order to solve the problem of direct sequence spread spectrum signal s check and recognition,a blind estimate algorithm is proposed,it based on cyclic spectrum theory and matrix transform.
为了解决正确检测和识别直扩信号的问题,提出一种基于循环谱理论和矩阵变换法的盲估计算法。
5) DS-SS signal
直扩信号
1.
How to acquire the pseudo-random code type of DS-SS signals is an important problem in obtaining the information from the DS-SS signals.
如何准确获得直扩信号中的伪码码型是解决直扩信号侦收的关键。
6) direct sequence spread spectrum (DS) signals
直扩(DS)信号
1.
The problem of estimating direct sequence spread spectrum (DS) signals and direct sequence code division multiple access (DS/CDMA) signals direct from the received signals has been of great research interest with the development of the field of wide-band weak signal processing and the field of communication antagonism.
直扩（DS）信号及直扩码分多址（DS/CDMA）信号的估计方法研究是宽带微弱信号检测与估计以及通信对抗领域的一个重要研究课题。
补充资料：贬江陵途中寄乐天、杓直、杓直以员外郎判盐
【诗文】：
想到江陵无一事，酒杯书卷缀新文。紫芽嫩茗和枝采，
朱橘香苞数瓣分。暇日上山狂逐鹿，凌晨过寺饱看云。
算缗草诏终须解，不敢将心远羡君。
【注释】：
【出处】：
全唐诗：卷412-33
想到江陵无一事，酒杯书卷缀新文。紫芽嫩茗和枝采，
朱橘香苞数瓣分。暇日上山狂逐鹿，凌晨过寺饱看云。
算缗草诏终须解，不敢将心远羡君。
【注释】：
【出处】：
全唐诗：卷412-33
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条