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This paper proposes a modified IMWBF decoding algorithm for low-density parity-check (LDPC) codes. In the proposed modification, the magnitude of the received signal is updated when the number of the unsatisfied parity-check equations participated by this received signal is larger than a predetermined threshold. Through this modification, the outlier, defined as the undesired large-magnitude received...
In next generation networks, ultra-dense small cell networks are emerging to deal with exponential data traffic increasing. With the deployment of small cells (SCs) becoming increasingly dense, these cells may be under-utilized during quite a few period of time. Depending on this circumstance, we aim to maximize the network energy efficiency by deactivating such under-utilized cells, subjecting to...
Sparse code multiple access (SCMA) is a proposed candidate for multiple access method in 5G telecommunication. In SCMA system, the classic receiver is message passing algorithm (MPA). MPA can reach a near optimal performance, but the computation process is complicated and time-consuming, so MPA is suitable for advanced terminal. But for simple terminal such as sensor node, large mount of calculations...
Non-full spreading space-time block code(NFS-STBC) means the time period of one block is less than the number of transmit antennas($s<n_t$). NFS-STBC, compared with the conventional full spreading STBC(FS-STBC), have higher transmission rate but usually lower diversity order. In this paper, by considering the combination of STBC with bit- interleaved coded QAM modulations(BICM) systems, we propose...
It is well known that Space-Time Block Codes from orthogonal designs (O-STBC) are linearly Maximum-Likelihood (ML) decodable. However there are not full rate complex O-STBC designs except for two transmit-antennas. Recently, one class of minimum-decoding-complexity STBCs (MDC-STBC) have been studied: (1) they have higher rate than O-STBC; (2) they are single-symbol decodable (SSD) and (3) they can...
In order to improve the segmentation effect of image with high noise, a fast thresholding segmentation method is proposed. Based on two-dimension histogram of image, parallel segmentation approach is introduced. Two-dimension thresholding problem is converted into one-dimension thresholding problem by projection. At the same time, the noise in image is filtered with neighborhood average. The experimental...
Based on adaptive rood pattern search (ARPS) algorithm, a new fast and efficient motion estimation algorithm called enhanced adaptive rood pattern search (E-ARPS) is proposed in this paper. Unlike ARPS, the E-ARPS utilizes spatial correlations to predict the initial search centre, then introduces a new initial search based on motion vector(MV) centre-biased distribution , and an adaptive unequal-arm...
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