CAJ | 학술논문

强多址干扰下的弱信号捕获是高灵敏度GNSS接收机比较常见又难以解决的问题。本文提出一种非等长的伪码设计方法，通过使各路导航信号调制伪码码长互质，从时域上降低了伪码的互相关值，从频域上降低了目标信号和干扰信号的谱分离系数。理论分析和仿真表明，基于非等长的伪码优化方法，能够改善强多址干扰环境中弱信号的捕获性能。
강다지간우하적약신호포획시고령민도GNSS접수궤비교상견우난이해결적문제。본문제출일충비등장적위마설계방법，통과사각로도항신호조제위마마장호질，종시역상강저료위마적호상관치，종빈역상강저료목표신호화간우신호적보분리계수。이론분석화방진표명，기우비등장적위마우화방법，능구개선강다지간우배경중약신호적포획성능。
A PN code optimal design based on unequal-length code modulation is proposed in this paper for better perfor-mance of code acquiring for weak signals .The principle is that by using un-equal-length code in spread-spectrum modulation the cross-correlations between different signals have been sliding ,thus suppressing multiple access interference effectively .Theoretical analysis and simulation show that this design has predictive power for compressing multi access interference .