What is a White Noise Generator?

A white noise generator is a device that uses a stable two-machine tube as a noise source and can generate white noise in a certain frequency range.

It has a uniform spectrum in the frequency range of 20Hz ~ 100kHz

White noise refers to

The generation of Gaussian noise as a small module of the system requires special requirements such as fast speed, small occupied resources, and high accuracy. FPGA is used to generate Gaussian noise. First, an m-sequence generator is used to generate uniformly randomly distributed noise, and then the uniformly distributed and The mapping function relationship between Gaussian distributions uses linear interpolation to fit a first-order curve, which in turn generates Gaussian noise ^[1] .

When a communication system performs a noise test, noise in multiple frequency bands is used. To solve this problem, a solution based on FPGA output multiband noise is proposed. The baseband noise signal is generated by using a piecewise accumulation of a pseudo-random sequence, and the baseband noise signal is up-converted to an intermediate frequency by an orthogonal up-conversion technique. Matlab simulation and testing show that the output noise signal has a flat frequency spectrum and low jitter, which can meet the needs of practical applications ^[2] .