摘要
针对在多相滤波架构的数字信道化接收机中,较高的数据抽取率导致子信道时间分辨率较低,从而影响接收机到达时测量精度的问题,提出了一种基于滑动离散傅里叶变换(DFT)和Haar小波结合的到达时间测量方法,该方法利用信道化接收机检测得到的到达时间粗测值和频率测量值对原始采样数据进行截取,并引导对应通道的滑动DFT和求模,对模值进行Haar小波变换并检测,得到到达时间的精测值。分析了该方法消耗的资源量,仿真试验验证了该方法在提高到达时间测量精度方面的有效性。
In a digital channelized receiver with polyphase filter architecture,high data extraction rate leads to low time resolution in sub-channel,which affects the measurement accuracy of time of arrival(TOA).In view of the above problem,this paper proposes a TOA measurement method based on sliding discrete Fourier transform(DFT)and Haar wavelet transform.In the method,the original sampled data are cut by rough value of TOA and frequency measured through channelized receiver,and sliding DFT&modulus calculation are guided in corresponding channel.Then,Haar wavelet transform is used to detect the modulus value and accurate value measured of TOA is fetched.This paper analyzes the amount of resources consumed by the method,and validates the effectiveness of the method in raising the measurement precision of TOA through simulative test.
作者
丁兆贵
李琳
苏雨
田德民
王德恒
DING Zhaogui;LI Lin;SU Yu;TIAN Demin;WANG Deheng(The 723 Institute of CSSC,Yangzhou 225101,China;Unit 91197 of PLA,Qingdao 266400,China)
出处
《舰船电子对抗》
2024年第6期15-18,36,共5页
Shipboard Electronic Countermeasure
