Method for determining the mutual time delay of ultrawideband OFDM signals

The efficient algorithm for determining the mutual time delay of orthogonal frequency-division multiplexing (OFDM) signals propagating in ultrawideband (UWB) satellite communications systems is proposed. The algorithm is based on modified calculation of the mutual uncertainty function of signals to...

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Bibliographic Details
Published in:Journal of communications technology & electronics 2017-02, Vol.62 (2), p.141-148
Main Authors: Ershov, R. A., Morozov, O. A.
Format: Article
Language:English
Subjects:
Algorithms
Analysis
Communications Engineering
Communications systems
Communications technology
Digital video
Doppler effect
Engineering
Frequency division multiplexing
Global positioning systems
GPS
Lithosphere
Mathematical analysis
Methods
Narrowband
Networks
Orthogonal Frequency Division Multiplexing
Radio communications
Satellite communications
Signal processing
Studies
Theory and Methods of Signal Processing
Time delay
Ultrawideband
Uncertainty
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Summary:The efficient algorithm for determining the mutual time delay of orthogonal frequency-division multiplexing (OFDM) signals propagating in ultrawideband (UWB) satellite communications systems is proposed. The algorithm is based on modified calculation of the mutual uncertainty function of signals to compensate for the Doppler effect. The directly calculated mutual uncertainty function of UWB signals makes it impossible to obtain the consistent estimate of the mutual time delay due to the influence of the Doppler broadening of a spectral band. The proposed algorithm relies on the fact that received signals are divided into separate narrowband channels in which mutual uncertainty functions are subsequently calculated. The algorithm operation modes based on OFDM and pseudorandom frequency-hopping signals are compared.
ISSN:1064-2269
1555-6557
DOI:10.1134/S1064226917020048