GLRT-Based Preamble Sequence Detection in OFDM
Journal
IEEE Vehicular Technology Conference
Journal Volume
2021-April
Date Issued
2021
Author(s)
Abstract
In practical orthogonal frequency division multiplexing standards, preamble waveforms are adopted to facilitate timing synchronization, frequency synchronization and system parameter acquisition. Due to implementation simplicity, the crosscorrelation-based method is adopted to determine the transmitted preamble sequence in the literature. However, because of the lack of channel estimation, the crosscorrelation-based method suffers severe performance degradation in large delay spread channels. To solve the problem, a preamble sequence detection method based on the generalized likelihood ratio test (GLRT) principle is proposed and analyzed in the paper. Due to embedded channel estimation, the GLRT method is shown to provide the decision error performance robust to channel dispersion and outperform the conventional crosscorrelation-based method significantly in large delay spread channels, at cost of increased implementation complexity. ? 2021 IEEE.
Subjects
carrier frequency offset
initial synchronization
Orthogonal frequency-division multiplexing
preamble sequence detection
timing offset
Orthogonal frequency division multiplexing
Signal detection
Cross correlations
Frequency synchronization
Generalized likelihood-ratio tests
Implementation complexity
Large delay spreads
Parameter acquisition
Performance degradation
Timing synchronization
Channel estimation
Type
conference paper