In this paper, we consider the design of a binary network coding scheme for the wireless broadcast, in which the same packet sequence is broadcasted to multiple receivers. In the proposed coding scheme, a short block ...
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ISBN:
(纸本)9781424492688
In this paper, we consider the design of a binary network coding scheme for the wireless broadcast, in which the same packet sequence is broadcasted to multiple receivers. In the proposed coding scheme, a short block code is employed for the coding across the broadcasted packets to generate redundant packets to recover the lost packets for all terminals in the service. In particular, we assume the optimal decoder and consider the design of short block codes with a small number of redundancy. We present a residual graph based code design method and propose an iterative design algorithm with stochastic update. The short block code is then extended with an improved pseudo-random code to achieve the flexibility on redundancy. Numerical results show that the proposed coding scheme provides superior performance over other coding schemes.
In this paper we study decode-and-forward multi-antenna relay systems that achieve bi-directional communication in two time slots. We investigate different downlink broadcast schemes which employ binary or analog netw...
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In this paper we study decode-and-forward multi-antenna relay systems that achieve bi-directional communication in two time slots. We investigate different downlink broadcast schemes which employ binary or analog networkcoding at the relay. We also analyze and compare their performances in terms of diversity order and symbol error probability. It is shown that if exact downlink channel state information is available at the relay, using analog networkcoding in the form of multi-antenna maximal-ratio transmit beamforming to precode the information vectors at the relay gives the best performance. Then, we propose a Max-Min antenna selection with binary network coding scheme that can approach this performance with only partial channel state information.
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