Abstract
With the continuous progress of science and technology, intelligent wireless sensor network (IWSN) communication has become indispensable in its role in production and life because of its convenient network settings and flexible use. However, with the widespread availability of intelligent wireless sensor networks, the use of many wireless sensor nodes constitutes a multi-node wireless communication system, which turns the accuracy and low complexity of multi-node detection in sensor networks into a problem. Although the traditional algorithm has excellent performance, it cannot give consideration to both accuracy and complexity. Therefore, a maximum logarithm message passing algorithm based on serial and threshold (S-T-Max-log-MPA) for multi-mode detection in IWSN is proposed in this paper. In this algorithm, the threshold is used to determine the necessary conditions of sensor node stability first, and then the sensor node information updating is integrated into the resource node information updating, so that the system can maintain good accuracy, performance, and change the situation of poor system accuracy at low threshold. Compared with the traditional algorithm, the proposed algorithm significantly changes the algorithm complexity reduction rate of the system multi-node detection. Simulation results show that the algorithm has a good balance between accuracy and complexity reduction rate.
Highlights
The intelligent wireless sensor network (IWSN) is composed of a large number of static or mobile micro sensor nodes; the nodes form a wireless communication system [1]
The ratio of the number of sensor nodes that can be carried on a certain time-frequency block and the size of a codebook in the Sparse code multiple access (SCMA) system is defined as the overload factor, and its resource block and the size of a codebook in the SCMA system is defined as the overload factor, calculation method can be expressed as Equation (2): and its calculation method can be expressed as Equation (2): J J
K n o where, ∼ xj represents the edge probability of symbol xj, ξk /j represents the set of all variable nodes in VN that are connected to the function nodes ck except the j-th sensor node
Summary
The intelligent wireless sensor network (IWSN) is composed of a large number of static or mobile micro sensor nodes; the nodes form a wireless communication system [1]. The existing multi-node detection algorithm still cannot solve the problem of low transmission accuracy and high algorithm complexity in wireless sensor networks, so how to reduce the algorithm complexity and improve the message transmission accuracy is the key research objective in IWSN. IWSN, a of maximum logarithm message passing algorithm improve the transmission accuracyinand the multi-node detection algorithm in the IWSN, on serial and threshold for multi-mode. In this algorithm, the exponential operation is reduced to the additive operation by multi-mode detection in IWSN is proposed in this paper.
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