CAJ | 학술논문

分析了射频前端带宽与BOC信号自相关函数的关系,研究了射频前端带宽和早迟码间距对S曲线的影响。在规范的TOA误差估计模型框架下,采用非相干延时码跟踪锁定环,推导出非相干延时锁定环理论计算的码跟踪误差与射频前端带宽、早迟码间距、载噪比、积分时间和码环路带宽之间的关系表达式,从而定量地分析了非相干延时锁定环的码跟踪误差。最后对BPSK-R信号和BOC（10,5）信号的码跟踪性能做了比较,比较表明,BOC（10,5）信号的码跟踪性能优于传统的BPSK-R信号,在相同的码跟踪精度条件下,BOC（10,5）比10.23 MHz BPSK-R信号所需要的载噪比约低7 dB,比1.023 MHz BPSK-R信号低15 dB左右。
분석료사빈전단대관여BOC신호자상관함수적관계,연구료사빈전단대관화조지마간거대S곡선적영향。재규범적TOA오차고계모형광가하,채용비상간연시마근종쇄정배,추도출비상간연시쇄정배이론계산적마근종오차여사빈전단대관、조지마간거、재조비、적분시간화마배로대관지간적관계표체식,종이정량지분석료비상간연시쇄정배적마근종오차。최후대BPSK-R신호화BOC（10,5）신호적마근종성능주료비교,비교표명,BOC（10,5）신호적마근종성능우우전통적BPSK-R신호,재상동적마근종정도조건하,BOC（10,5）비10.23 MHz BPSK-R신호소수요적재조비약저7 dB,비1.023 MHz BPSK-R신호저15 dB좌우。
The relationship between the autocorrelation function of BOC signal and the radio-frequency front-end bandwidth is analyzed,and the influence of radio-frequency front-end bandwidth and spacing between early code and late code on the S curve is studied.Under the canonical model framework of TOA error estimation and with the no-coherent delay lock loop,a quantitative formula which relates the theoretically calculated code tracking error to the RF front-end bandwidth,spacing between early code and late code,carrier to noise ratio,integration time and code loop bandwidth,is derived leading to a quantitative analysis of the code tracking error for non-coherent delay lock loop.Finally,a comparison between the code tracking performance of BPSK-R signal and that of BOC（10,5） signal is made.The comparison shows that the BOC（10,5） signal code tracking performance is indeed superior to that of the traditional BPSK-R signal,and that to achieve the same code tracking accuracy,the required carrier to noise ratio for BOC（10,5） signal is ～7 dB lower than that for 10.23 MHz BPSK-R signal and～15 dB lower than that for 1.023 MHz BPSK-R signal.