摘要
针对无线电导航系统在典型海域存在远近效应问题这一技术难题,提出利用最小均方误差多用户检测技术的方法。型陆基无线电导航系统企图继承以GPS为代表的星基无线电导航系统的若干技术成果,特别是伪噪声相位编码扩频技术,以便大大提高以罗兰C为代表的经典陆基无线电导航系统的定位精度,但同时也不可避免的遇到远近效应问题这一技术难题。以我国的南海海域为例,其背景噪声主要是大气噪声,针对背景噪声相对较强的远近效应现象,提出利用最小均方误差多用户检测技术的方法,并对其互相关函数进行了理论分析和计算。仿真结果表明,在新型陆基无线电导航系统中,最小均方误差多用户检测技术是消除远近效应干扰的有效方法。
To investigate the near-far problem in the typical sea area, the minimun-mean-error multiuser detector is proposed. New type onshore radio navigation system has a high precision of location, using production of satellitic radio navingation system similar to GPS, especially pseudo random phasic coding technique. And the near-far problem must be solved inevitably. For atmospheric radio noise is the main interferential factor, the minimum-mean-error multiuser detector is employed in South China Sea for background noise and nearfar problem. The cross-correlation is computed, and the simulation results show that minimum-mean-error multiuser detector can be an availability approach for solving near-far problem in new type onshore radio navigation system.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2007年第6期870-873,共4页
Systems Engineering and Electronics
关键词
无线电导航
远近效应
最小均方法误
差多用户检测
互相关函数
radio navigation system
near-far problem
minimum-mean-error
multiuser detectorcross-correlation
