Abstract
In order to enhance the reliability and anti-interference performance of wireless sensor network (WSN) data transmission, this paper designs the low power scheme of the WSN from the angle of error correction coding and proposes the hybrid check matrix construction (HC) algorithm based on iterative coding algorithms with linear coding complexity. The algorithm first improves the traditional iterative coding algorithm, making it suitable for non-binary low-density parity check (LDPC) codes. Then, the algorithm applies the backward iteration method to change the coding scheme and uses the check matrix construction method so that the progressive edge growth (PEG) algorithm has a lower triangular structure, which is used as a base matrix. An improved quasi-cyclic LDPC (QC-LDPC) algorithm, with a lower triangular structure, is used to generate a cyclic shift matrix and a finite domain coefficient matrix. Simultaneously, the short loop is eliminated and the optimal check matrix is selected for use in the channel coding process. The non-binary LDPC-CPM system is modeled and simulated. The simulation results show that the non-binary LDPC code constructed by the HC algorithm not only has linear coding and storage complexity but also has strong error correction capability. The design of non-binary LDPC-CPM system parameters can enhance the reliability, anti-jamming capability and reduce the complexity and reduce the complexity of the WSN.
Highlights
The wireless sensor network (WSN) is a network information system integrating distributed information acquisition, information transmission and information processing technologies [1,2,3,4].It adopts a self-organizing method to configure a large number of sensor nodes and collects and processes the target information in the network coverage area through the collaborative work of the nodes
The information sequence Uo gets the code word sequence Co after mapping and non-binary low-density parity check (LDPC) coding and through interleaving and symbol mapping into the M-ary continuous phase modulation (CPM), where CPM is decomposed into continuous phase encoder (CPE) and memoryless modulation (MM) [33], CPE has continuous phase encoding of the input information as input of memory modulation MM and MM selects a suitable waveform to send to the channel
We designed a data encoding scheme for WSNs and proposed a hybrid check matrix based on a non-binary LDPC code iterative coding algorithm in the design process
Summary
The wireless sensor network (WSN) is a network information system integrating distributed information acquisition, information transmission and information processing technologies [1,2,3,4]. It adopts a self-organizing method to configure a large number of sensor nodes and collects and processes the target information in the network coverage area through the collaborative work of the nodes. Different from traditional wireless network to improve service quality and efficient bandwidth utilization, this paper adds coding and decoding technology to WSNs, which can greatly improve the anti-noise performance and improve communication quality of WSNs. Low power consumption is especially important for WSN nodes during the design process. In order to improve the data error correction performance of data transmission between sensor nodes and between nodes and aggregation nodes, the WSNs data
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