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Spectrally Efficient Multi-Carrier Modulation Using Gabor Transform

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DOI: 10.4236/wet.2013.42017    3,958 Downloads   6,540 Views Citations

ABSTRACT

Non Orthogonal Frequency Division Multiplexing (NOFDM) systems make use of a transmission signal set which is not restricted to orthonormal bases unlike previous OFDM systems. The usage of non-orthogonal bases generally results in a trade-off between Bit Error Rate (BER) and receiver complexity. This paper studies the use of Gabor based on designing a Spectrally Efficient Multi-Carrier Modulation Scheme. Using Gabor Transform with a specific Gaussian envelope; we derive the expected BER-SNR performance. The spectral usage of such a NOFDM system when affected by a channel that imparts Additive White Gaussian Noise (AWGN) is estimated. We compare the obtained results with an OFDM system and observe that with comparable BER performance, this system gives a better spectral usage. The effect of window length on spectral usage is also analyzed.

Cite this paper

S. Sriram, N. Vijayakumar, P. Kumar, A. Shetty, V. Prasshanth and K. Narayanankutty, "Spectrally Efficient Multi-Carrier Modulation Using Gabor Transform," Wireless Engineering and Technology, Vol. 4 No. 2, 2013, pp. 112-116. doi: 10.4236/wet.2013.42017.

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