Distributed Linear Constellation Precoding With BICM/BICM-ID in Two-Way Relaying Communications

作者：Yan Hongzhong; Nguyen Ha H

来源：IEEE Transactions on Vehicular Technology, 2017, 66(1): 481-493.

DOI：10.1109/TVT.2016.2550479

• Bit-interleaved coded modulation (BICM)
• BICM with iterative decoding (BICM-ID)
• distributed linear constellation precoding (DLCP)
• iterative decoding (ID)
• network coding
• quaternary decoding
• two-way relaying

This paper investigates distributed linear constellation precoding (DLCP) for two-way relaying communication systems in conjunction with the techniques of bit-interleaved coded modulation (BICM) and BICM with iterative decoding (BICM-ID). First, a decoding strategy for the relay node that is based on quaternary code representation is developed. Then, the union bounds (for the case of BICM) and error-free feedback bounds (for the case of BICM-ID) on the quaternary digit error probability and bit error probability under network coding in the multiple-access (MA) phase are obtained. Based on the obtained bounds, the impact of DLCP on the error performance is analyzed by considering three error types in the MA phase. It is shown that type-3 errors need to be carefully taken into account in the design of a DLCP scheme. By developing a performance metric related to type-3 errors, the design parameter of DLCP is optimized when BICM is used, whereas it is shown that DLCP is not needed when BICM-ID is used. Extensive simulation results are provided to corroborate the analysis and demonstrate the performance superiority of the proposed decoding strategy over the one that directly decodes the exclusive-OR (XOR) code. For the case of BICM, the performance advantage achieved by properly designing DLCP is also illustrated.

• 出版日期2017-1
• 单位Saskatchewan; Saskatoon