The week's pick
Reseach Article
Simulation of GDFT for CDMA
| National Conference on Advancement in Electronics & Telecommunication Engineering |
| Foundation of Computer Science USA |
| NCAETE - Number 4 |
| May 2012 |
| Authors: Vaishali Patil, Jaikaran Singh, Mukeshtiwari |
| ce5a5fb0-b525-4c8f-ac51-599d1f385f46 |
Vaishali Patil, Jaikaran Singh, Mukeshtiwari . Simulation of GDFT for CDMA. National Conference on Advancement in Electronics & Telecommunication Engineering. NCAETE, 4 (May 2012), 15-19.
Abstract
Generalized Discrete Fourier Transform (GDFT) with non-linear phase is a complex valued, constant modulus orthogonal function set. GDFT can be effectively used discrete multi-tone (DMT), orthogonal frequency division multiplexing (OFDM) and code division multiple access (CDMA) communication systems. The constant modulus transforms like discrete Fourier transform (DFT), Walsh transform, and Gold codes have been successfully used in above mentioned applications over several decades. However, these transforms are suffering from low cross-correlation features. This problem can be addressed by using GDFT transform. This paper describes the MATLAB simulation of GDFT for code division multiple access (CDMA). We have also implemented Gold, Walsh and DFT codes. Their performance is analyzed and compared on the basis of various parameters such as Maximum Value of Out-of-Phase Auto-Correlation, Maximum Value of Out-of-Phase Cross-Correlation, Mean-Square Value of Auto-Correlation, Mean-Square Value of Cross-Correlation and merit factor.
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