Parallel implementation method of real-time phase noise hardware generators

Abstract

The invention discloses a parallel implementation method of real-time phase noise hardware generators. By the adoption of the method, real-time, high-speed and parallel phase noise simulation can be achieved at an FPGA processor. According to the method, firstly, on the basis of the FPGA high-speed and parallel implementation method of uniform white noise of a cellular automaton theory, a calculation method of N-way initialization vectors needed by the parallel implementation and a recurrence function relation of the parallel generating algorithm of the cellular automaton are given; then, on the basis of real-time parallel generation of white noise, parallel first-order IIR filter banks are designed, and by setting a gain value at a corner frequency, noise output which meets features of a power law spectrum is achieved by filtering; finally, an equivalent form of the phase noise is obtained from the white noise, and is superposed with effective signals to complete the phase noise simulation. Under the condition of low FPGA source consumption, the method rapidly generates white noise which is long in cycle, large in band width and good in quality in real time, and on this basis, a parameter-controllable phase-noise simulation hardware generator is achieved.

Description

technical field [0001] The invention relates to the technical field of satellite communication system simulation and phase noise modeling, in particular to a parallel implementation method of a real-time phase noise hardware generator. Background technique [0002] Satellite communication system simulation technology can reproduce an ideal, degraded, or even near-real radio wave propagation environment on the ground, and simulate the influence of various time and space changes in the satellite communication link on signal propagation, and has long become a technology of communication, measurement and control, etc. Indispensable means of verification testing in the field. During the transmission process of satellite communication links, radio waves will inevitably be affected by random non-ideal characteristics such as noise interference, channel fading, ionospheric scintillation, and transponder nonlinearity. Among them, one of the main factors affecting the bit error rate ...

AI Technical Summary

Problems solved by technology

However, the existing methods based on time-domain filtering have poor real-time performance and low speed when realizing phase noise simulation.

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