Calculation method of bit error rate for hard demodulation of uwoc system based on ggd channel model

Abstract

The invention discloses an error rate calculation method for UWOC system hard demodulation based on GGD channel model. The method comprises the following steps: based on GGD, a point-to-point underwater wireless optical communication system model is established by adopting MPSK modulation; by using the Gauss Laguerre polynomials, the closed expressions of point-to-point MPSK modulation error ratewithout using the channel coding are obtained, the average error rate of LDPC- UWOC system is statistically analyzed, based on the GGD distribution, a multi-hop wireless optical communication system model with MPSK modulation is established, the closed expressions of MPSK modulation error rate without using the channel coding are obtained, a multi-hop wireless optical communication system model with LDPC channel coding is established and the performance of the system is statistically analyzed by using Monte Carlo simulation. The complexity of this method is low, and the performance of error rate system is better than that of systems without channel coding; the new GGD channel model is adopted, which accords with the experimental condition.

Description

technical field The present invention relates to the BPSK and MPSK (M>4) modulation method in the wireless optical communication system, which is based on the generalized Gamma distribution under the point-to-point and serial relay cooperation structure, the calculation method of the bit error rate and the system interruption probability, which belongs to the underwater wireless optical communication system. communication technology field. Background technique The development of underwater wireless communication technology is one of the key technologies for humans to explore the ocean. In terms of military use, underwater wireless communication technology provides a means for communication between nuclear submarines; Information such as marine resources, topography and organisms can be easily and quickly transmitted to researchers. At present, there are mainly three forms of underwater wireless communication: underwater wireless radio frequency communication, underwater ...

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Problems solved by technology

The current problem is: for the generalized Gamma ocean turbulence channel that is more in line with the experimental results, the system performance research based on the channel description function has not been reported yet

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