Title :
Inter-cell antenna calibration for coherent joint transmission in TDD system
Author :
Hanqing Xu ; Yajun Zhao ; Linmei Mo ; Chen Huang ; Baoyu Sun
Author_Institution :
Baseband Algorithm Dept., ZTE Corp., Beijing, China
Abstract :
In this work the modeling and calibration method of reciprocity error in a coherent TDD coordinated multi-point (CoMP) joint transmission (JT) system are addressed. The modeling includes parameters such as amplitude gains and phase differences of RF chains between the eNBs. The calibration method used for inter-cell antenna calibration is based on precoding matrix indicator (PMI) feedback by UE. Furthermore, we provide some simulation results for evaluating the performance of the calibration method in different cases such as varying estimation-period, cell-specific reference signals (CRS) ports configuration, signal to noise ratio (SNR), phase difference, etc. The main conclusion is that the proposed method for inter-cell antenna calibration has good performance for estimating the residual phase difference.
Keywords :
antennas; calibration; phase estimation; precoding; time division multiplexing; CRS port configuration; CoMP joint transmission system; JT system; PMI feedback; SNR; calibration method; cell-specific reference signal port configuration; coherent TDD coordinated multipoint joint transmission system; coherent joint transmission; intercell antenna calibration; performance evaluation; precoding matrix indicator feedback; reciprocity error; residual phase difference estimation; signal to noise ratio; Calibration; Downlink; Estimation; Radio frequency; Signal to noise ratio; Transmitting antennas; CoMP; JT; LTE-Advanced; TDD; inter-cell antenna calibration; phase difference; reciprocity error;
Conference_Titel :
Globecom Workshops (GC Wkshps), 2012 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4673-4942-0
Electronic_ISBN :
978-1-4673-4940-6
DOI :
10.1109/GLOCOMW.2012.6477586
