Method for multiple input multiple output functional network to achieve blind equalization of wireless laser communication electric domain signals

Abstract

The invention relates to a method for a multiple input multiple output (MIMO) functional network to achieve blind equalization of wireless laser communication electric domain signals, in particular to an electric domain signal blind equalization method under the circumstance that a communication channel between a transmitter and a receiver of wireless laser communications has fading characteristics. The method for the MIMO functional network to achieve the blind equalization of the wireless laser communication electric domain signals is applicable to laser communication networks, popularizes an artificial neural network to a functional network by using generalization of the artificial neural network, designs a blind equalization processing method based on an MIMO functional frame, designs an MIMO functional network structure and a network state update principle thereof, uses functional network output drive and a principle of neural network nonlinear dynamics fully, decomposes singular value of a receipt signal matrix to obtain approximate subspace value of a signal to be detected, and performs mapping by using the approximate subspace value as an input vector, so that rapid convergence is achieved by depending on small data volume only, and the receipt signal can reappear in a true signal subspace.

Description

technical field [0001] The invention belongs to the technical field of signal processing of wireless optical communication, and is suitable for laser communication networks, especially a blind equalization method for electrical domain signals under the condition that the channel between the transmitter and receiver of wireless laser communication has fading characteristics. Background technique [0002] As a special communication method, wireless laser communication emphasizes the normal communication between the transmitter and the receiver. For laser communication, the communication link often passes through clouds, which attenuate the energy transmission of the laser, resulting in the reduction of laser energy received by the receiving end. Moreover, the transmission of laser light in the atmosphere is subject to absorption and scattering by atmospheric molecules, aerosol particles, and various solid or liquid particles; changes in atmospheric pressure, temperature, humid...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a blind equalization method for blind equalization of wireless laser communication electrical domain signals using a multi-input multi-output functional network in order to solve the problem that the existing blind equalization method needs to rely on the large amount of data at the receiving end. The blind equalization method has Different from the traditional blind equalization method, it needs to rely on the large amount of data at the receiving end

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