Performance Analysis of Coded Cooperation with Hierarchical Modulation

In order to achieve the improved diversity over the original coded cooperation in fast fading channel, the novel cooperation strategy with hierarchical modulation is proposed in this paper, where users send both their own as well as their partners´ parity bits with hierarchical error protection during the cooperation frame. Only the frame-level synchronization is necessary when using the proposed strategy, which facilitates the implementation on the uplink. The bounds for the block-error rate (BLER) of the proposed strategy are analyzed and the simulation results given.