Random Articles
Reseach Article
An Optimized Near Perfect Reconstruction Trans-multiplexer
| International Journal of Computer Applications |
| Foundation of Computer Science (FCS), NY, USA |
| Volume 77 - Number 2 |
| Year of Publication: 2013 |
| Authors: Piyush Jain, Jitendra Jain |
10.5120/13370-0964
|
Piyush Jain, Jitendra Jain . An Optimized Near Perfect Reconstruction Trans-multiplexer. International Journal of Computer Applications. 77, 2 ( September 2013), 46-53. DOI=10.5120/13370-0964
Abstract
The design of an optimized near-perfect reconstruction (NPR) type trans-multiplexer has been proposed. Cosine modulation has been used to design the synthesis and analysis sections of the trans-multiplexer. The design of transmultiplexer was reduced to design of single low-pass prototype FIR filter which is designed using variable window function (Kaiser, Cosh and Dolph- Chebyshev). An unconstrained, non-linear, iterative optimization technique Levenberg-Marquardt (LM) has been applied for optimization of filter coefficients such that the prototype filter have minimum value of error in its pass band, transition band and stop band. This results in minimum value of interference parameter like inter-channel interference (ICI) and inter-symbol interference (ISI) that occurs due to interference of filters in their stop-band and non-ideal nature of filters in their pass-band respectively. When compared to the optimized prototype filter designed without using any window function, the proposed method gives better performance in terms of reduction in errors in pass band, transition band and stop band and interference parameters (ICI and ISI) for same filter specification.
References
- R. K. Soni, A. Jain, R. Saxena, "An improved and simplified design of pseudo trans-multiplexer using Blackman window family," Digital Signal Processing Vol. 20, no. 3, pp. 743–749, 2010.
- D. Lacroix, N. Goudard, M. Alard, "OFDM with guard interval versus OFDM/Offset QAM for high data rate UMTS downlink transmission," Proceedings of IEEE Conference on Vehicular Technology, pp. 2682–2686, 2001.
- G. Cherubini, E. Eleftheriou, S. Olcer, "Filtered Multitone modulation for very high-speed digital subscriber lines". IEEE J. Sel. Areas Commun. Vol. 20, pp. 1016–1028, 2002.
- A. K. Akansu and X. Lin, "A comparative performance evaluation of DMT (OFDM) and DWMT (DSBMT) based DSL communications systems for single and multitone interference," in Proceedings of the 1998 IEEE International Conference on Acoustics speech and Signal Processing, vol. 6, pp. 3269–3273 ,1998.
- C. W. Kok, W. C. Siu, and Y. M. Law, " Peak constrained least-squares QMF banks," Signal Processing, Vol. 88, No. 10, pp. 2363-2371, 2008.
- R. K. Soni, A. Jain, R. Saxena, "An optimized trans-multiplexer using combinational window functions," Signal, Image and Video Processing, Online, April 2010.
- A. Kumar, G. K. Singh, R. S. Anand, "An improved method for designing quadrature mirror filter banks using the Levenberg-Marquardt optimization," Signal, Image and Video processing, published online, 2011.
Index Terms
Keywords