NASA NTRS · 19920014932
Frequency-offset insensitive digital modem techniques
Abstract
Conventional DPSK systems are adversely affected by transmitter/receiver frequency offsets due to frequency reference errors and Doppler shifts. Two DPSK modem concepts are presented which avoid the long frequency acquisition process of conventional DPSK. One technique involves a modified demodulator for conventional DPSK signals, while the other involves making minor changes to both the modulator and demodulator. Simulation results are provided showing performance relative to conventional DPSK.
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Dutta, S., Nicholas, D. C.. 1990-01-01. Frequency-offset insensitive digital modem techniques. https://ntrs.nasa.gov/citations/19920014932
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