Ping-Chung Wang

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We consider the compute-and-forward relay network with limited feedback. A novel scheme called adaptive compute-and-forward is proposed to exploit the channel knowledge by working with the best ring of imaginary quadratic integers. This is enabled by generalizing Construction A lattices to other rings of imaginary quadratic integers which may not form(More)
Communication in the presence of bounded timing asynchronism which is known to the receiver but cannot be easily compensated is studied. Examples of such situations include point-to-point communication over inter-symbol interference (ISI) channels and asynchronous wireless networks. In these scenarios, although the receiver may know all the delays, it is(More)
We consider the problem of physical-layer network coding when the channel exhibits block fading. Specifically, we focus on the use of lattice codes in a compute-and-forward framework for realizing physical-layer network coding. We construct a novel lattice ensemble called the root-Low-Density ConstructionA (root-LDA) ensemble which uses Construction A with(More)
In this paper, the channel estimation problem at the relay node in TWRN is investigated. We propose a turbo receiver at the relay where it jointly combines a nonbinary decoder and an EM estimator. By passing soft value between the decoder and estimator in an iterative manner, our approach outperforms the method of separate decoding and estimation in terms(More)
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