Real-time telephone channel simulation

The paper describes the real-time implementation of a telephone channel simulator on the TMS32010 digital signal processor. Several characteristics are simulated, including harmonic distortion, attenuation distortion, group delay distortion, listener echo, frequency offset, phase jitter, gaussian noise, impulsive noise, phase jumps and gain hits. A design program written in Pascal and running on a personal computer allows the user to specify and test a channel response, then generate the TMS32010 code for the real-time implementation.