Issue No.09 - September (1970 vol.19)
J.V. Wait , IEEE
This note discusses a technique for representing linear bandpass systems in terms of a state-variable formulation (first-order matrix differential equation) involving complex-valued envelope functions. In narrow-band cases this yields a model involving more slowly varying quantities, and thus, less computing time is required for a given simulation task.
Bandpass systems, communication systems, complex envelope functions, digital simulation, state-variable techniques.
J.V. Wait, "State-Variable Techniques for Digital Simulation of Bandpass Systems", IEEE Transactions on Computers, vol.19, no. 9, pp. 830-831, September 1970, doi:10.1109/T-C.1970.223048