Blind detection algorithm based on M2M communication frequency spectrum sharing and coexistence

Abstract

The invention discloses a blind detection algorithm based on M2M communication frequency spectrum sharing and coexistence. The blind detection algorithm comprises the following steps: step SS1: constructing a traditional user overcomplete model and an M2M communication sparse model; step SS2: performing convex optimization solution on an M2M transmission signal; step SS3: constructing a traditional user receiving data matrix; step SS4: performing singular value decomposition on the receiving data matrix in the step SS3; step SS5: setting a weight matrix; and step SS6: selecting an activation function of the Hopfield neural network, and performing a Hopfield neural network iterative operation. According to the blind detection algorithm disclosed by the invention, the restoration of a traditional user in the M2M communication is achieved by using the blind detection of the Hopfield neural network, a state equation is iterated according to the traditional user overcomplete model and the M2M communication sparse model by using an M2M device transmission signal obtained by convex optimization, and during each iteration, the Hopfield neural network is entered to verify that the error rate of the blind detection algorithm disclosed by the invention is better than that of the method for restoring the traditional user method assuming that a channel is known under the same conditions bymeans of simulation.

Description

technical field [0001] The invention relates to a blind detection algorithm based on M2M communication spectrum sharing and coexistence, and belongs to the technical field of communication signal processing. Background technique [0002] The support of M2M communication will be an important part of the communication system, especially the 5G cellular system, which puts forward higher requirements on the adaptability of communication signals. [0003] Literature [Xiaohua Li, Jian Zheng, Mingjian Zhang. "COMPRESSIVE SENSING BASEDSPECTRUM SHARING AND COEXISTENCE FOR MACHINE-TO-MACHINE COMMUNICATIONS," International Conference on Acoustics Speech and Signal Processing (ICASSP), IEEE, 2017:3604–3608.] introduced A new spectrum sharing scheme: a large number of dispersed M2M devices share the same channel with traditional communication users such as cellular users. When the traditional user continues to transmit, the M2M device directly transmits on this channel without too much ...

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Problems solved by technology

However, the above scheme assumes that the transmission channel is known when the system is designed, so when the influence of the channel is removed, the bit error rate of recovering the traditional user signal is relatively high

However, the actual communication system transmission channel is time-varying and mostly unknown

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