The week's pick
Reseach Article
FPGA based DWT-IDWT implementation of OFDM on UWB Systems
| International Journal of Applied Information Systems |
| Foundation of Computer Science (FCS), NY, USA |
| Volume 2 - Number 7 |
| Year of Publication: 2012 |
| Authors: Naagesh S. Bhat |
10.5120/ijais12-450366
|
Naagesh S. Bhat . FPGA based DWT-IDWT implementation of OFDM on UWB Systems. International Journal of Applied Information Systems. 2, 7 ( May 2012), 14-19. DOI=10.5120/ijais12-450366
Abstract
Orthogonal Frequency Division Multiplexing/Modulation (OFDM) is widely used for symbol level modulation-demodulation in communication systems for a high data rate low distance range applications. OFDM refers to both multiplexing and modulation technique to transmit parallel data using orthogonal carriers in the same or different frequency bands. In this work, DWT-OFDM is modeled which aims to send the signal in 3. 168-4. 752 GHz of the UWB spectrum with three working channels, while maintaining minimum bandwidth of 528 MHz. The architectures for FFT-OFDM and DWT-OFDM are modeled in Simulink software reference model and compared the performances of both from BER plots proving DWT-OFDM better over FFT-OFDM by 6dB gain. DWT-OFDM is implemented for all wavelets which proved Haar better over other wavelets by approximately 2dB. The input signal is sent as 64 samples per frame generated using two sine waves of different frequencies at 5 MHz and 10 MHz respectively. The maximum operating frequency for the design is 140 MHz with zero timing violating paths. Xpower Analyzer reports the total estimated power consumption by the FPGA board as 885 mW.
References
- Ramjee Prasad, OFDM for Wireless Communications Systems, Artech House Universal personal communications series, ISBN 1-58053-796-0, 2004
- Yu-Wei Lin, Chen-Yi Lee, Design of an FFT/IFFT Processor for MIMO OFDM Systems, IEEE transactions on Circuits and Systems-I, Vol. 54, No. 4, April 2007
- Oscar Robles Palacios and Carlos Silva Cardenas, Design and implementation of a reconfigurable OFDM modulator for software-defined radios, IEEE Transactions on Communications, 2008
- Anuj Batra, Jaiganesh Balakrishnan and Anand Dabak, Multiband OFDM: Why it Wins for UWB, Texas Instruments, June, 2003
- Yuh-Ren Tsai, Xiu-Sheng Li, Kasami Code-Shift-Keying Modulation for Ultra
- Wideband Communication Systems, Institute of Communications Engineering, National Tsing Hua University, Taiwan
- K. Abdullah and Z. M. Hussain, Studies on DWT-OFDM and FFT-OFDM Systems, IEEE International Conference on Communication, Computer and Power, February 15-18, 2009
- W. Saad, N. El-Fishawy, S. EL-Rabaie, and M. Shokair, An Efficient Technique for OFDM System Using Discrete Wavelet Transform, Springer-Verlag Berlin Heidelberg, pp. 533–541, 2010
- R. Dilmirghani and M. Ghavami, Wavelet Vs Fourier Based UWB Systems, 18th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, pp. 1-5, September, 2007
- Khaizuran Abdullah and Zahir M. Hussain, Impulsive Noise Effects on DWT- and WPTOFDM versus FFT-OFDM, International Conference on Communication, Computer and Power (ICCCP'09), February 15-18, 2009
- Hiroki Harada, Marco Hernandez and Ryuji Kohno, Multiband and Multicarrier Wavelet Packet Multiplexing for UWB Transmissions, Proceedings of the 2008 IEEE International Conference on Ultra-wideband (ICUWB2008), Vol. 3, 2008
- Khaizuran Abdullah, Katrina L. Neville, and Zahir M. Hussain, An Interference Cancellation Algorithm for Fourier-Based and Wavelet-based OFDM Systems, International Conference on Advanced Technologies for Communications, 2008
- Claudio R. C. M. da Silva, Francisco C. B. F. Muller and Aldebaro Klautau, Performance Analysis of a Multiband OFDM UWB System in the Presence of Narrowband Interference, IEEE Globecom proceedings, 2009
- Khaizuran Abdullah, Seyed Mehdi Lajevardi and Zahir M. Hussain, QAM Modulations over Wavelet based OFDM Channel for Facial Expression Recognition, IEEE Transactions on Signal Modulation Techniques, pp. 1-5, 2009
Index Terms
Keywords