CAJ | 학술논문

在高动态扩频通信系统中,多普勒频移会导致匹配滤波器输出相关峰值降低而影响伪码的捕获。在分析相关峰所受多普勒频移影响的基础上,提出了一种扩展2FSK扩频通信系统的多普勒频移容限的方法,即适当缩短相关累加时间,伪码捕获和数据解调时采用相关累加与非相关累加相结合的方法。该方法可有效降低FSK扩频系统中相关峰对多普勒频移的敏感性,使多普勒频移容限得到较好的扩展。
재고동태확빈통신계통중,다보륵빈이회도치필배려파기수출상관봉치강저이영향위마적포획。재분석상관봉소수다보륵빈이영향적기출상,제출료일충확전2FSK확빈통신계통적다보륵빈이용한적방법,즉괄당축단상관루가시간,위마포획화수거해조시채용상관루가여비상관루가상결합적방법。해방법가유효강저FSK확빈계통중상관봉대다보륵빈이적민감성,사다보륵빈이용한득도교호적확전。
In the high dynamic spread spectrum communication system,the Doppler shift can decrease the correlation peak from the matched filter and influence the acquisition of PN code.On the basis of analyzing the impact of Doppler shift on the correlation peak,a method to extend Doppler shift tolerance in 2FSK spread spectrum communication system is proposed,that properly shorten the time of coherent integration,and combine coherent integration with incoherent integration together in PN code acquisition and data demodulation.This program is effective in reducing the correlation peak＇s sensitivity to Doppler shift,and the Doppler shift tolerance is effectively extended.