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    题名 作者 年代 出处 被引量
1A Novel Least-Entanglement-Assisted Asymmetric Quantum Codes Based on Sliding Grill显示文摘We propose new methods for constructing novel entanglement-assisted asymmetric quantum codes based on combinatorial designs and sliding grill. Based on a special case of combinatorial designs, our proposed method can construct a type of parity check matrix with greater column weight and better decoding performance. Combined with the characteristic of asymmetric quantum channel, we propose new method of sliding grill. Mother matrix and submatrix can be constructed. The null space of the parity-check matrix gives entanglement-assisted asymmetric quantum code. Tanner graph of the code has a girth of at least 6. Our proposed quantum code has higher code rate with the same error correction capability. These families of entanglement-assisted asymmetric quantum codes consume only one copy of maximally entangled state(ebit),and outperform other quantum codes based on similar construction method according to our numerical computation.CAO Dong SONG Yaoliang ZHU Cheng 2014Chinese Journal of Electronics2014,23,3:2
2Towards Practical Distributed Video Coding for Energy-Constrained Networks显示文摘Most of current distributed video codecs are developed based on the structure of Stanford scheme that employs channel coding like LDPC and Turbo codes.However, they need many times of iteration and feedback,which bring high decoding complexity and latency that make them less practical in energy-constrained networks.In this paper, a new distributed video codec based on modulo operation in the pixel domain is proposed, which only needs one feedback request and has a much lower decoding complexity. Mathematical proof of the equivalence between modulo operation and coset partition in the M-ary field is given, which means that the modulo operation in the M-ary field is a good substitute for channel codes in the distributed video coding systems. A system is built based on the proposed scheme. Simulation results show that the proposed scheme outperforms the state-of-the-art distributed video codecs with the decoding complexity as low as 1% to 10% of them.CAO Yue GAO Shaoshuai ZHANG Can QIU Gengfeng 2016Chinese Journal of Electronics2016,25,1:0
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