东南大学学报（自然科学版）
東南大學學報（自然科學版）
동남대학학보（자연과학판）
JOURNAL OF SOUTHEAST UNIVERSITY
2015年
3期
423-427
,共5页
目标检测概率%EBPSK%多普勒扩展%距离%多普勒耦合效应%模糊函数
目標檢測概率%EBPSK%多普勒擴展%距離%多普勒耦閤效應%模糊函數
목표검측개솔%EBPSK%다보륵확전%거리%다보륵우합효응%모호함수
target detection probability%EBPSK(extended binary phase shift keying)%Doppler spread%range-Doppler coupling effect%ambiguity function
研究了EBPSK（ extended binary phase shift keying）调制脉冲雷达信号的探测性能．首先分析了该雷达系统信号在几种情况下基于CFAR（ constant false alarm rate）的目标检测概率，表明在未知目标距离情况下，EBPSK调制雷达信号的探测性能优于传统LFM雷达信号的探测性能，在短波信道中，EBPSK脉冲雷达信号不存在多普勒频扩．该信号的模糊函数是对称的，所以不存在距离多普勒耦合效应．其次，EBPSK调制雷达系统的调制器灵活多变，可根据要求设置不同的调制参数以改变信号的测距精度与目标探测性能．最后，通过仿真实验验证了理论分析的合理性，在较大脉冲回波时延估计误差的前提下，EBPSK信号的脉冲压缩性能高于LFM的脉冲压缩性能，且获得相同的探测性能，当时延大于0.05μs时，EBSPK脉冲雷达信号所需SNR比LFM脉冲雷达信号要少；当时延为0.5μs时，EBSPK脉冲雷达信号所需SNR比LFM脉冲雷达信号少25 dB．
研究瞭EBPSK（ extended binary phase shift keying）調製脈遲雷達信號的探測性能．首先分析瞭該雷達繫統信號在幾種情況下基于CFAR（ constant false alarm rate）的目標檢測概率，錶明在未知目標距離情況下，EBPSK調製雷達信號的探測性能優于傳統LFM雷達信號的探測性能，在短波信道中，EBPSK脈遲雷達信號不存在多普勒頻擴．該信號的模糊函數是對稱的，所以不存在距離多普勒耦閤效應．其次，EBPSK調製雷達繫統的調製器靈活多變，可根據要求設置不同的調製參數以改變信號的測距精度與目標探測性能．最後，通過倣真實驗驗證瞭理論分析的閤理性，在較大脈遲迴波時延估計誤差的前提下，EBPSK信號的脈遲壓縮性能高于LFM的脈遲壓縮性能，且穫得相同的探測性能，噹時延大于0.05μs時，EBSPK脈遲雷達信號所需SNR比LFM脈遲雷達信號要少；噹時延為0.5μs時，EBSPK脈遲雷達信號所需SNR比LFM脈遲雷達信號少25 dB．
연구료EBPSK（ extended binary phase shift keying）조제맥충뢰체신호적탐측성능．수선분석료해뢰체계통신호재궤충정황하기우CFAR（ constant false alarm rate）적목표검측개솔，표명재미지목표거리정황하，EBPSK조제뢰체신호적탐측성능우우전통LFM뢰체신호적탐측성능，재단파신도중，EBPSK맥충뢰체신호불존재다보륵빈확．해신호적모호함수시대칭적，소이불존재거리다보륵우합효응．기차，EBPSK조제뢰체계통적조제기령활다변，가근거요구설치불동적조제삼수이개변신호적측거정도여목표탐측성능．최후，통과방진실험험증료이론분석적합이성，재교대맥충회파시연고계오차적전제하，EBPSK신호적맥충압축성능고우LFM적맥충압축성능，차획득상동적탐측성능，당시연대우0.05μs시，EBSPK맥충뢰체신호소수SNR비LFM맥충뢰체신호요소；당시연위0.5μs시，EBSPK맥충뢰체신호소수SNR비LFM맥충뢰체신호소25 dB．
The detection performance of the EBPSK ( extended binary phase shift keying) modulated pulse radar signal is studied.First, the target detection performances based on CFAR (constant false a-larm rate) of the proposed signal are analyzed under several conditions.The detection performance of the proposed signal is better than that of the LFM radar signal under the condition with unknowntarget distance.EBPSK pulse radar signal can combat the effect of Doppler spread on system performance in HF ( high frequency) channel.The ambiguity function of the proposed signal is symmetric, so Range-Doppler coupling effect does not exist.Secondly, the signal modulator in EBPSK modulation radar system is flexible.According to different requirements of ranging, the ranging accuracy and target de-tection performance of the system are varied by setting different modulation parameters.Finally, the correctness and rationalization of the theoretical considerations is verified by the results of experiment. The pulse compression performance of the EBPSK radar signal is better than that of the LFM radar sig-nal under the condition of larger delay estimation error of echo pulse.To obtain the same detection performance, the required SNR of the proposed signal is less than that of the LFM signal when the echo delay is greater than 0.05μs.The required SNR of the proposed signal can be decreased by ap-proximately 25 dB compared with that of the LFM radar signal when the echo delay is 0.5μs.
