_div_share_bd" style="float: right; display:none;">

Performance Analysis of OFDM Synchronization Using Customized Floating Point for Low Complexity

Full-Text HTML XML Download Download as PDF (Size:635KB) PP. 3112-3120
DOI: 10.4236/cs.2016.710264    1,257 Downloads   1,651 Views
V. Janakiraman1,2, M. Kannan2


1Department of Electronics and Communication Engineering, Apollo Engineering College, Chennai, India.
2Department of Electronics Engineering, MIT, Anna University, Chennai, India.


Orthogonal frequency-division multiplexing (OFDM) is a multi carrier modulation scheme mainly used for digital communications. The performance of OFDM system heavily depends on the synchronization scheme used. In most cases, the accuracy level of synchronization will be worsened by the error caused in fixed point arithmetic involved. In this paper, we analyze the impact of the fixed point arithmetic on the performance of the coarse timing and frequency synchronization. Here with an analytical approach through numerical simulations bit length of IEEE 754 standard single precision format is optimized according to the required degree of accuracy for low complexity. Also, a complete precision level requirement for FFT computations with all possible modulation types is obtained. The proposed precision model is compared with IEEE standard single precision model and its efficiency in OFDM synchronization process is proved through MATLAB simulations. Finally, the complexity reduction of proposed precision model in both addition and subtraction is proved against single precision format using hardware synthesis. Here we proved that more than 50% complexity reduction is achieved as compared to standard precision models without compromising quality. The quality retention of proposed model is proved in both timing and frequency synchronization process.


OFDM, Fast Fourier Transform, Floating Point Aithmetic, Synchronization, Customization

Cite this paper

Janakiraman, V. and Kannan, M. (2016) Performance Analysis of OFDM Synchronization Using Customized Floating Point for Low Complexity. Circuits and Systems, 7, 3112-3120. doi: 10.4236/cs.2016.710264.
CS Subscription
E-Mail Alert
CS Most popular papers
Publication Ethics & OA Statement
CS News
Frequently Asked Questions
Recommend to Peers
Recommend to Library
Contact Us

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.