Sheng-mei Zhao

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In this paper, a class of state-dependent relay channel with orthogonal channels from the source to the relay and from the source and the relay to the destination is studied. The two orthogonal channels are corrupted by common channel state which is known to both the source and the relay non-causally. The lower bound on the capacity for the channel is(More)
In this paper, a construction method of quantum low density parity check codes (quantum LDPC) which based on classical quasi-cyclic sparse sequence is proposed, and the quantum code QLDPC(3,8)(16,6) and QLDPC(3,8)(64,24) are selected as examples to illustrate this construction method. The performances of this kind quantum LDPC codes are discussed over the(More)
Taking advantages of the property of classical codes from balance incomplete block designs (BIBDs), an improved construction of quantum Low Density Parity Check (quantum LDPC) codes is proposed in this paper. In the construction, we modified the original "Construction B" procedures to assure the quantum parity check matrix commutativity. It is shown that(More)
Future wired and wireless communication system will employ multiuser detection techniques, however, at this moment there are only suboptimal solutions available because of the rather high complexity of optimal detectors. Quantum detection techniques promise efficient optimal solutions to this NP (non-polynomial) hard problem. In this paper, we propose a(More)
With the development of quantum error correction techniques, many counterparts of classical error correction coding techniques have been found in quantum area. As the quantum counterpart of a good error correction code in classical communications, quantum low density parity check code becomes a promising coding technique in quantum error correction area. In(More)
Quantum error correction is the basic technique for realization of quantum communication and quantum computation. So far, the theories of quantum error correction have become more and more perfect, and many counterpart of classical error correction coding technique have been found in quantum area. In this article, we proposed a new method of construction of(More)
Covariance shaping least squares estimator is a new kind of linear estimator based on covariance shaping in quantum signal processing (QSP) framework. In this paper, we apply the covariance shaping least squares (CSLS) estimator to the detection of MIMO systems that leads to a new detection algorithm, covariance shaping MIMO detection algorithm. We derive(More)
Covariance shaping least squares estimator is a new kind of linear estimator based on covariance shaping in quantum signal processing (QSP) framework, it is a biased estimator directed at improving the performance of traditional least- squares (LS) estimator. In this paper, we discuss the covariance shaping least squares (CSLS) estimator, and apply it in(More)
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