Novel demodulation algorithm combining orthogonal mapping and multiband downsampling
Yuan Liang, hong tang, Xuchun Zhang, Xin Xiang · 2024
This paper proposes an optimized algorithm combining multi-band downsampling with orthogonal mapping to reduce the complexity of the receiving implementation process. Firstly, the feasibility of combining multi-band downsampling with orthogonal demodulation is discussed based on the spectral changes of the signal after downsampling. The algorithm is optimized from two perspectives: sampling rate design and spectrum shape reconstruction based on IQ dualichannel signals. Simulation tests show that the improved algorithm can effectively demodulate and restore the original amplitude and phase baseband signals, and can effectively reduce the amount of data processing and algorithm complexity.