Joint Estimation of MCFOs and Channel Gains for Two-Way Multi-Relay Systems With High Mobility

被引：8

作者：

Chakraborty, Sucharita ^{[1
]}

Sen, Debarati ^{[1
]}

机构：

[1] Indian Inst Technol Kharagpur, GS Sanyal Sch Telecommun, Kharagpur 721302, W Bengal, India

来源：

IEEE WIRELESS COMMUNICATIONS LETTERS | 2017年 / 6卷 / 05期

关键词：

TWRN; ECM; SAGE; AF protocol; Doppler spread; doubly selective channel; NETWORKS;

D O I：

10.1109/LWC.2017.2722410

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This letter proposes space-alternating generalized expectation maximization and expectation conditional maximization-based joint estimation of multiple carrier frequency offsets and channel gains for two-way relay network with multiple relays. The method iteratively updates least square estimates with less time and stable convergence. We adopt discrete prolate spheroidal and Karhunen-Loeve basis expansion models to capture rapid time variations of channel. Proposed estimators result in acceptable performance for very high user mobility (corresponds to long term evolution for railway). The derived Cramer-Rao lower bound is shown to be comparable with MSE performances.

引用

页码：610 / 613

页数：4

共 8 条

[1] EM-Based Semi-Blind Channel Estimation in Amplify-and-Forward Two-Way Relay Networks [J].