Performance Enhancement Scheme Using Hierarchical Modulation in Cooperative Communication
نویسندگان
چکیده
In this paper, a decode-and-forward cooperative communication system using hierarchical modulation (HM) to improve bit error probability (BER) performance is proposed. A HM symbol has high priority (HP) and low priority (LP) data streams that have different levels of BER. In the proposed scheme, all decoded symbols are treated as HP symbol by suitable design for cooperative communication. Consequently, the proposed scheme makes it possible to obtain equal BER performance in both streams. Simulation result shows that the proposed scheme provides better BER performance than conventional cooperative communication scheme in same rate.
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