A linear-programming design language and its application to data-transmission filters

The authors introduce FF, a linear-programming design language, and use a detailed design example in FF to present techniques for the design of transmit-and-receive finite-impulse-response (FIR) filters. In the example transmit filter, after the usual analog reconstruction filter is modified to place its steep rolloff where it will ease the requirements on the FIR filter, the latter can then be designed so that the combined spectral response of the analog and FIR filters will be root Nyquist, meet a regulatory mask, and minimize interference with adjacent channels. The choice of a transmit-filter phase response is based on the resulting peak transmit-power requirement. An analog/FIR combination receive filter is similarly designed to satisfy requirements on intersymbol-interference, degree of match to the transmitter, and adjacent-channel interference