Lun-Chung Peng

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It has long been recognized that diversity is one of the most effective countermeasures for fighting the occasional deep fades suffered in communications over fading channels. Recently, various schemes of adopting relays to assist a source so that together they constitute a diversity system have been widely investigated. Since cooperation between the source(More)
Network coding is a hot research topic due to its ability to improve network throughput and robustness. Most existing research on network coding assumes that the transmission between two nodes in a network is free of errors. Accompanying with this assumption is that nodes in the network always perform hard decisions regarding the received data bits. In this(More)
A cooperative communication system in which a censorial relay is adopted to assist binary data transmission from a source to a destination is addressed in this paper. A censorial relay is also called a selective DF (decode-and-forward) relay. It censors (i.e. does not pass forward) decisions that are deemed as not reliable enough. The reliability of(More)
Given a parity check matrix (PCM) H, its associated low-density parity-check (LDPC) code is the solution space of the homogeneous system of linear equations Hx = 0. In this paper, we propose to adopt the solutions to Hx = b (a nonhomogeneous system of linear equations) as the code words, where b is a nonzero vector and is called the code's target syndrome.(More)
This paper proposes a scheme for combining the soft decisions made in network coding. The soft decisions are expressed in the form of probabilities. We call our scheme of combining those probabilistic soft decisions by the name of “probabilistic decision fusion.” This scheme can improve the BER (bit error rate) performance in network coding(More)
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