Weak Signal Acquisition Algorithm for Indoor Positioning Receiver

• 作 者: JunMo;ZhongliangDeng;JichaoJiao;ShuJiang;ShengchangYu;FuhaiXu;
• 机 构: School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, China
• 出 处: 第七届中国卫星导航学术年会
• 发表日期: 2016年期

　　Positioning receivers are required to be capable of receiving weak signals to satisfy indoor applications.When searching weak signals,the receiver may unsuccessfully acquire due to the noise.This paper is focus on the problem of weak signal acquisition in Time & Code Division-Orthogonal Frequency Division Multiplexing (TC-OFDM) system which is based on the mobile broadcast networks.We provide theoretical analysis of the TC-OFDM signal,and propose a new acquisition algorithm based on coherent / non-coherent integral for weak signal acquisition.This algorithm compensates non-coherent integral loss for consi-dering the effect of decision threshold that caused by non-coherent integral loss,which can increase the relative acquisition peak and achieve weak signal acquisition effectively.The experimental results indicate that the proposed algorithm can significantly improve the TC-OFDM receivers ability of weak signal acquisition by 1-3dB,and reduce the probability of weak signal acquisition leakage.