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Modulation Design for Two-Way Amplify-and-Forward Relay HARQ

Wenhao Wu (wenhaowu1989***at***hotmail.com)
Hans Mittelmann (mittelmann***at***asu.edu)
Zhi Ding (zding.ucdavis***at***gmail.com)

Abstract: As a practical technique for enhancing relay and HARQ transmissions, Modulation Diversity (MoDiv) uses distinct constellation mappings for data retransmissions. In this work, we study the MoDiv optimization in a amplify-and-forward (AF) two-way relay channel (TWRC). The design of MoDiv design to minimize the bit-error rate (BER) is formulated into a successive Koopmans-Beckmann Quadratic Assignment Problem (QAP), which is solved sequentially with a robust tabu search method. The performance gain of our MoDiv scheme over retransmission without remapping and a heuristic MoDiv scheme is demonstrated with numerical results.

Keywords: Modulation diversity, 2-way relay, HARQ, QAP

Category 1: Applications -- Science and Engineering (Other )


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Entry Submitted: 10/28/2015
Entry Accepted: 10/28/2015
Entry Last Modified: 01/19/2016

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