Parallel processing for programmable wideband digital modulation

a, b A circuit for upsampling and upconverting a high rate signal that is divided into M in-phase (I) symbols and M quadrature (Q) symbols. A Nyquist filter upsamples by a factor of k each of the 2M symbols in parallel during one system clock period (CP). The filter has a plurality of 2kM filter components , that each provides a continuous output. A plurality of multipliers each upconverts a filter component output with a carrier wave signal that is output from a numerically controlled oscillator . A plurality of adders each adds the output of two multipliers to recombine corresponding I and Q samples to output kM samples during a CP. For continuous phase modulation, N parallel bits are input into the filter , upsampled in one CP, and accumulated and modulated in parallel in one CP. For analog processing, M (I) and M (Q) symbols are input into an FIR filter for upsampling, and decimated at a MUX/DAC block for subsequent analog upconversion.