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Applicant:
Indian Institute of Technology (IIT) Patna 
Author:
Sudhan Majhi, Ting See Ho,  
Corresponding Authors:
Sudhan Majhi  
DOI #:
10.1109/TVT.2014.2327985 
Title:
Blind Symbol Rate Estimation and Testbed Implementation for OQPSK Modulated Signals 
Journal:
IEEE Transactions on Vehicular Technology 
Year:
2015 
Volume:
64 (3) 
Page:
954-963 
Keywords:
Estimation, Bandwidth, Baseband, Timing, Frequency estimation, Frequency modulation, Correlation 
Abstract:
Although several blind symbol-rate estimation methods have been proposed for linearly modulated signals, none of these methods are applicable to offset quadrature phase-shift keying (OQPSK)-modulated signals. The frequently used cyclic correlation (CC) methods are unable to estimate the symbol rate for OQPSK signals as the cyclic peak at the symbol-rate frequency disappears due to the presence of an offset between the in-phase (I) and quadrature (Q) components of OQPSK signals. In this paper, a blind symbol-rate estimation for linearly modulated signals has been proposed. The symbol rate of OQPSK signals has also been estimated with no knowledge of modulation schemes. The offset between I and Q components of the received signals is compensated for by using a set of approximate offsets in obtaining the cyclic peak at the symbol-rate frequency. The proposed estimation has a robust performance in the presence of unknown frequency offset, timing offset, and carrier phase. The algorithm is implemented on a test bed to provide experimental results.  
Entered by:
Venkata Dantham on 2020-08-04 
 
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