Performance and Network Load for Receiver Cooperation versus Hybrid ARQ
Timo Mayer · 2006
We investigate uplink receiver cooperation of base-stations and compare it to Hybrid ARQ with respect to the network load. Receiver cooperation is performed by a joint detection unit, detecting signals of different base-stations. Information theoretic bounds for receiver cooperation are derived. Significant gains can be achieved when the capacities on the links, where the cooperation takes place, are sufficiently large. Afterwards, an iterative joint detector is reviewed which applies interference cancellation. Its results are used to compare receiver cooperation with conventional Hybrid ARQ. It turns out that, due to its better performance, receiver cooperation even has a lower network load than Hybrid ARQ in the lower SNR region. With respect to a defined normalized throughput, receiver cooperation also has a larger throughput than Hybrid ARQ. 1.