Title :
Doppler-rate estimation for burst digital transmission
Author :
Morelli, Michele
Author_Institution :
Dept. of Inf. Eng., Pisa Univ., Italy
fDate :
5/1/2002 12:00:00 AM
Abstract :
We propose a new algorithm for Doppler rate estimation in burst-mode phase shift keying (PSK) transmissions. This issue may arise in mobile radio links when the received signal experiences significant time-varying Doppler distortion, as in low-earth-orbit satellite systems. The algorithm is based on the transmission of a training sequence and has a feedforward structure that is easy to implement in digital form. Its estimation accuracy is close to the Cramer-Rao bound even at SNR values as low as 0 dB. Comparisons with earlier methods are discussed
Keywords :
AWGN; Doppler shift; feedforward; mobile radio; phase shift keying; radio links; Cramer-Rao bound; Doppler rate estimation; PSK; SNR; burst digital transmission; burst-mode phase shift keying; estimation accuracy; feedforward structure; low-earth-orbit satellite systems; mobile radio links; time-varying Doppler distortion; training sequence; Distortion; Doppler shift; Frequency estimation; Land mobile radio; Low earth orbit satellites; Maximum likelihood estimation; Phase estimation; Phase shift keying; Satellite broadcasting; Time varying systems;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2002.1006551
