A new detection technique for digital radio communication systems applied spectrum phase interpolation

In cellular communications systems using digital radio services, especially those that use low-Earth orbiting satellites (LEOs), phase-modulated signals such as QPSK are received with relatively fast Doppler shifts. We developed a coherent detector which uses a new algorithm called the spectrum phase interpolation method (SPIM) to compensate for the Doppler shifts. SPIM will aid TDMA propagation analyses of QAM and QPSK modulated waves and orthogonally vector spread spectrum modulated waves