Precoding and Equalization Matrix Design Method for Marine Wireless Optical Communication System
A wireless optical communication, precoding matrix technology, applied in radio transmission systems, transmission systems, short-range systems, etc., can solve problems such as low reliability and system transmission rate improvement, and achieve the effect of improving communication reliability.
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Embodiment 1
[0090] Such as figure 1 As shown, the precoding and equalization matrix design method of the marine wireless optical communication system includes the following steps:
[0091] S1: build with N r ×N t Channel MIMO UOWC system, precoding matrix F and equalization matrix G;
[0092] S2: Process the transmission signal of the MIMO UOWC system with a DC bias vector to obtain the power constraint on the precoding matrix;
[0093] S3: After receiving the transmitted signal at the receiving end of the MIMO UOWC system, the equivalent receiving symbol expression is obtained after the equalization matrix and DC removal operation;
[0094] S4: Obtain the MSE expression between the equivalent received symbol and the transmitted signal based on the static channel information and the statistical characteristics of the turbulence effect;
[0095] S5: Construct the optimization problem of minimizing the MSE under the power constraint condition obtained in step S2, wherein the optimizatio...
Embodiment 2
[0179] On the basis of Embodiment 1, in order to more fully illustrate the beneficial effects of the present invention, the effectiveness and advancement of the present invention will be further described below in combination with simulation analysis and results.
[0180] The simulation uses the random channel model [6] to calculate the underwater static channel matrix, and the key simulation parameters are shown in Table 1. In addition, the near-shore water body is considered in the simulation, and its absorption, scattering and extinction coefficient values are [a,b,c] T =[0.179,0.219,0.398] T [21] C.D.Mobley, Light and water: radiative transfer innatural waters [M], New York, NY, USA: Academic, 1994. The precoding and equalization matrix design method proposed by the invention is also applicable to underwater channels and transceiver configuration parameters in other turbulent environments.
[0181] Table 1 Key simulation parameter list
[0182]
[0183] Specificall...
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