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This paper studies the problem of determining the optimum degree distribution for distributed LDPC codes in two-way relay channels. Based on the framework of multi-edge type (MET) LDPC codes, we propose a methodology to asymptotically optimize the code's ensemble when different segments within the distributed codeword have been transmitted through different channels and experience different SNRs....
In most studies on code-division multiple access/packet reservation multiple access (CDMA/PRMA) for uplink time-division duplexing (TDD) single-hop cellular networks (SCNs), perfect power control is assumed and each time slot is divided into fixed number of code slots. It is always assumed that this capacity of a time slot can be fully utilized. However, in practice the mobile stations have limited...
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