A Novel Method of Inverting Signal Spectrum for Software Radio System
Yu Zhang · Beijing Youdian Xueyuan xuebao · 2003
While the direct bandpass sampling method for multiple discontinuous narrowband radio signals can ease up the A/D bottleneck in a software radio system, the spectrum of some of signal may be inverted. The impact of the inverse placement of spectrum for signals with different modulation modes is analyzed, then the method to invert radio signal spectrum is given. An implementation method with low computation complexity(number of computation needed per unit time) is given based on multirate digital signal processing theory.