The problem of detecting conjugate cyclic features (CCFs) despite time-varying carrier frequency offsets is considered. The novelty of this paper is a model for the conjugate cyclic autocorrelation function (CCAF) of the receive signal when transmitting a cyclostationary signal through a Doppler-rate channel. Moreover, a matched filter (MF) for recovering the energy of the transmitted-signal CCAF is derived. When the Doppler rate is unknown a-priori, the MF can be used in a loop to yield Doppler-shift and Doppler-rate estimates, which facilitates further tasks such as demodulation. Performance advantages over brute-force time-domain de-chirping are demonstrated. While this work is applicable to all channels with rapidly moving receive and transmit antennas, the performance is evaluated on real-world and simulated low-earth orbit satellite data.    «

The problem of detecting conjugate cyclic features (CCFs) despite time-varying carrier frequency offsets is considered. The novelty of this paper is a model for the conjugate cyclic autocorrelation function (CCAF) of the receive signal when transmitting a cyclostationary signal through a Doppler-rate channel. Moreover, a matched filter (MF) for recovering the energy of the transmitted-signal CCAF is derived. When the Doppler rate is unknown a-priori, the MF can be used in a loop to yield Doppler...    »