A comparative study of frequency offset estimations in real and complex OFDM systems using different algorithms

Swagatika Sahu; Saumendra Mohanty; Richa Srivastav

doi:10.1117/12.2012300

28 January 2013 A comparative study of frequency offset estimations in real and complex OFDM systems using different algorithms

Swagatika Sahu, Saumendra Mohanty, Richa Srivastav

Author Affiliations +

Proceedings Volume 8760, International Conference on Communication and Electronics System Design; 87601H (2013) https://doi.org/10.1117/12.2012300
Event: International Conference on Communication and Electronics System Design, 2013, Jaipur, India

Abstract

Orthogonal Frequency Division Multiplexing (OFDM) is an emerging multi-carrier modulation scheme, which has been adopted for several wireless standards such as IEEE 802.11a and HiperLAN2, etc. A well-known problem of OFDM is its sensitivity to frequency offset between the transmitted and received carrier frequencies. In (OFDM) system Carrier frequency offsets (CFOs) between the transmitter and the receiver destroy the orthogonality between carriers and degrade the system performance significantly. The main problem with frequency offset is that it introduces interference among the multiplicity of carriers in the OFDM signal.The conventional algorithms given by P. Moose and Schmidl describes how carrier frequency offset of an OFDM system can be estimated using training sequences. Simulation results show that the improved carrier frequency offset estimation algorithm which uses a complex training sequence for frequency offset estimation, performs better than conventional P. Moose and Schmidl algorithm, which can effectively improve the frequency estimation accuracy and provides a wide acquisition range for the carrier frequency offset with low complexity. This paper introduces the BER comparisons of different algorithms with the Improved Algorithms for different Real and Complex modulations schemes, considering random carrier offsets . This paper also introduces the BER performances with different CFOs for different Real and Complex modulation schemes for the Improved algorithm.

Citation Download Citation

Swagatika Sahu, Saumendra Mohanty, and Richa Srivastav "A comparative study of frequency offset estimations in real and complex OFDM systems using different algorithms", Proc. SPIE 8760, International Conference on Communication and Electronics System Design, 87601H (28 January 2013); https://doi.org/10.1117/12.2012300

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available