Analysis and Design of Cooperative BICM-OFDM Systems

作者：Islam Toufiqul^*; Schober Robert; Mallik Ranjan K; Bhargava Vijay K

来源：IEEE Transactions on Communications, 2011, 59(6): 1742-1751.

DOI：10.1109/TCOMM.2011.042111.100310

• BICM
• OFDM
• cooperative diversity

In this paper, we propose a novel cooperative diversity scheme for wireless systems employing the combination of bit-interleaved coded modulation (BICM) and orthogonal frequency division multiplexing (OFDM). The proposed scheme utilizes an amplify-and-forward protocol where relays are assigned to multiple groups. Relays in the same group transmit concurrently over disjoint sets of sub-carriers and relays in different groups transmit in different time slots. We derive closed-form expressions for the asymptotic worst-case pairwise error probability and the diversity gain of the proposed cooperative BICM-OFDM scheme. Based on the derived analytical results we develop design guidelines for sub-carrier allocation, relay grouping, and relay selection. Simulation results corroborate the derived analytical results and confirm the effectiveness of the developed optimization framework.

• 出版日期2011-6