(Publisher of Peer Reviewed Open Access Journals)

International Journal of Advanced Computer Research (IJACR)

ISSN (Print):2249-7277    ISSN (Online):2277-7970
Volume-8 Issue-37 July-2018
Full-Text PDF
DOI:10.19101/IJACR.2018.837020
Paper Title : Efficient reconfigurable architecture for advanced orthogonal frequency division multiplexing (AOFDM) transmitter
Author Name : Shalini J and Y. R. Manjunatha
Abstract :

The orthogonal frequency division multiplexing (OFDM) is most commonly used in the area of communication where a large amount of data needs to be transmitted through a wired or wireless channel. The main application OFDM lies in wireless network, internet model and digital video/audio broadcasting. Data need to be divided over a number of orthogonal channels to minimize the interference between each transmission channel and commonly performed using analog circuitry method. However, this method is less stable and bulky. In this paper, an efficient reconfigurable architecture for advanced OFDM transmission has been proposed. The architecture consists of 31 subcarrier channel, OFDM system using 64 point modified coordinate rotation digital computer (CORDIC) based inverse fast Fourier transform (IFFT) and novel 4 point quadrature amplitude modulation (QAM) is used for modulations of each channel. The input data is converted from serial to parallel, encoded using Hermitian symmetry, cyclic prefix, and converted serial to parallel. The comparison result shows that the proposed architecture is better than existing in terms of hardware utilizations. The proposed OFDM transmitter requires almost 35% lesser hardware resources with respect to existing techniques.

Keywords : Inverse fast Fourier transform (IFFT), Quadrature amplitude modulation (QAM), Orthogonal frequency division multiplexing (OFDM), Transmitter, Cyclic prefix, FPGA implementation.
Cite this article : Shalini J and Y. R. Manjunatha, " Efficient reconfigurable architecture for advanced orthogonal frequency division multiplexing (AOFDM) transmitter " , International Journal of Advanced Computer Research (IJACR), Volume-8, Issue-37, July-2018 ,pp.171-179.DOI:10.19101/IJACR.2018.837020
References :
[1]Hwang T, Yang C, Wu G, Li S, Li GY. OFDM and its wireless applications: a survey. IEEE Transactions on Vehicular Technology. 2009; 58(4):1673-94.
[Crossref] [Google Scholar]
[2]Liu Y, Tan Z, Hu H, Cimini LJ, Li GY. Channel estimation for OFDM. IEEE Communications Surveys & Tutorials. 2014; 16(4):1891-908.
[Crossref] [Google Scholar]
[3]Armstrong J. OFDM for optical communications. Journal of Lightwave Technology. 2009; 27(3):189-204.
[Crossref] [Google Scholar]
[4]Haque MM, Rahman MS, Kim KD. Performance analysis of MIMO-OFDM for 4G wireless systems under Rayleigh fading channel. International Journal of Multimedia and Ubiquitous Engineering. 2013; 8(1):29-40.
[Crossref] [Google Scholar]
[5]Perez-Calderon D, Lecuyer VB, Oria AC, Doblado JG. Diversity technique for OFDM systems: enhanced time-frequency multiplexing (eTFM). IEEE Transactions on Broadcasting. 2016; 62(3):505-11.
[Crossref] [Google Scholar]
[6]Garcia J, Cumplido R. On the design of an FPGA-based OFDM modulator for IEEE 802.16-2004. In international conference on reconfigurable computing and FPGAs 2005 (pp. 1-4). IEEE.
[Crossref] [Google Scholar]
[7]Chang KC, Sobelman GE. FPGA-based design of a pulsed OFDM system. In Asia pacific conference on circuits and systems 2006 (pp. 1128-31). IEEE.
[Crossref] [Google Scholar]
[8]https://www.globalspec.com/learnmore/semiconductors/logic/digital_parallel_serial_converters. Accessed 20 March 2018.
[9]Lin H, Siohan P. OFDM/OQAM with Hermitian symmetry: design and performance for baseband communication. In international conference on communications 2008 (pp. 652-6). IEEE.
[Crossref] [Google Scholar]
[10]Shalini. J and Manjunatha YR. FPGA based efficient N-point FFT architecture using CORDIC for advanced OFDM. International Journal of Engineering Research and Technology. 2018; 11(1):11-27.
[Google Scholar]
[11]Bhairannawar SS, Sarkar S, Raja KB, Venugopal KR. Implementation of fingerprint based biometric system using optimized 5/3 DWT architecture and modified CORDIC based FFT. Circuits, Systems, and Signal Processing. 2018; 37(1):342-66.
[Crossref] [Google Scholar]
[12]Roth CH. Digital systems design using VHDL. PWS Publishing Company; 1998.
[Google Scholar]
[13]Kumar N, Rohith S, Kumar HV. FPGA implementation of OFDM transceiver using Verilog-hardware description language. International Journal of Computer Applications. 2014; 102(6): 8-13.
[Crossref] [Google Scholar]
[14]Julius S, Dinh A. Fixed point design and implementation of an OFDM transmitter for etsi satellite digital radio on FPGA platform. In proceedings of the world congress on engineering and computer science 2011.
[Google Scholar]