A new blind algorithm for channel estimation in OFDM-based amplify-and-forward two-way relay networks

被引：1
|
作者：
Lin, Tzu-Chiao [1 ]
Phoong, See-May
机构：
[1] Natl Taiwan Univ, Grad Inst Commun Engn, Taipei, Taiwan
来源：
EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING | 2018年
关键词：
Blind channel estimation; Orthogonal frequency division multiplexing (OFDM); Two-way relay network (TWRN); SUBSPACE-BASED BLIND; SYSTEMS; IDENTIFICATION; DESIGN;
D O I：
10.1186/s13638-018-1193-3
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, we propose a blind channel estimation algorithm for the amplify-and-forward (AF) two-way relay network (TWRN) which consists of two terminal nodes and one relay node. The orthogonal frequency division multiplexing (OFDM) modulation is adopted for frequency selective channel. Both cyclic prefix (CP) and zero padding (ZP) are considered. The two cascaded channels are estimated in two steps. First, the cascaded channel causing the self-interference is estimated using a proposed power reduction method. Then, the other cascaded channel from source to destination is estimated by subspace method. Closed-form formulas for channel estimates are derived. In addition, we also carry out the theoretical mean square error analysis and derive the approximated Cramer-Rao bounds.
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页数：15
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