FPGA-based time-varying baseband multipath channel simulation device and method

Abstract

The invention discloses a time-varying baseband multipath channel analog device and device based on an FPGA (Field-Programmable Gate Array) and mainly solves the problem that in the prior art, a hardware platform is difficult to establish due to the fact that a channel model mathematical expression form is not concise enough, the required operation quantity is still very high and a channel analog device is high in hardware realization complexity and complex in structure. The device comprises a signal input module, a Rayleigh channel generation module, a multipath overlapping module and a channel output module. The method comprises the steps of (1), obtaining input signals; (2), generating Rayleigh channel output signals; (3), storing multipath parameters; (4), setting the number of Rayleigh channels; (5), obtaining prolonged time delay signals; (6), obtaining multipath total fading signals; and (7), obtaining output signals. The device and the method have the advantages of a simple structure, few hardware realization resources and configurable multipath parameters and are applicable to practical use of various wireless communication systems.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a time-varying baseband multi-path channel simulation device and method based on a field-programmable gate array FPGA (Field-Programmable Gate Array) in wireless communication. The invention can be used in various wireless communication experiments to realize the simulation of wireless communication channel characteristics, so that developers can conveniently test the performance of the wireless communication system in the laboratory environment, reduce the development cost of the wireless communication system and shorten the development time. cycle. Background technique [0002] Analog wireless communication channel technology mainly refers to the technology of modeling wireless channels and adding multipath delay, multipath fading, Doppler frequency deviation and Gaussian white noise to wireless signals. The study of wireless channels is an important part of wirele...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low-complexity FPGA-based time-varying baseband multipath channel simulation device with a simple structure for the existing time-varying baseband multipath channel in the field of hardware technology with high complexity and complex structure. The device uses less hardware to implement resources, and can configure the channel as a time-varying baseband multipath channel applicable to various environments through the multipath channel parameters pre-stored in the FPGA, and can be better applicable to various wireless communication systems in the practical application of

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