Arbitrary bandwidth noise generation method based on signal source

Abstract

The invention belongs to the technical field of signal processing, and particularly relates to an arbitrary bandwidth noise generation method based on a signal source, which comprises the following steps: generating pseudo-random data by using a pseudo-random generator, and performing data sampling on the pseudo-random data to generate random signals at a specific time interval; obtaining a noise bandwidth set by a user, generating a decimal bandwidth filter coefficient, performing time domain convolution on the random signal according to the decimal bandwidth filter coefficient, and generating bandwidth-limited noise data; calculating an interpolation multiple according to the bandwidth-limited noise data, and performing integral multiple interpolation processing to match the output sampling rate of the signal source; and in response to output mode selection of a user, independently outputting the noise data subjected to integral multiple interpolation processing, or performing amplitude control and frequency conversion on the data subjected to integral multiple interpolation processing, and superposing the data on an effective signal of a signal source to output. According to the method, noise of any bandwidth can be generated, and noise characteristics in various complex communication environments can be accurately simulated.

Images