Closed form relations for ICI and BER in FRFT based OFDM system

Author

Kumari, Smriti ; Rai, S.K. ; Kumar, Ajit ; Joshi, H.D. ; Singh, A.K. ; Saxena, R.

Author_Institution

Dept. of ECE, Jaypee Univ. of Eng. & Technol., Guna, India

fYear

2013

fDate

22-23 Feb. 2013

Firstpage

708

Lastpage

712

Abstract

In this article, the mathematical relationship for Bit Error Rate (BER) and Inter Carrier Interference (ICI) Power for Fractional Fourier Transform (FRFT) based OFDM system has been derived. These expressions are derived in the presence of normalizedCarrier Frequency Offset (CFO, ε). The BER performances has been evaluated for BPSK and QPSK modulation schemes in AWGN channel at different values of FRFT angle parameter `α´. It is found thatICI power is improved by 13.82 dB for ε = 0.1 at α = 3.14 and 2.1 dB for ε = 0.18 at α = 6.28 in FRFT-OFDM system over DFT-OFDM system. For BPSK, improvement of SNR is 0.53 dB for BER 1.132 × 10^-3 atε = 0.15, α = 9. 5 and 0.76 dB for BER 2.924 × 10^-3atε = 0.1, α = 9.5 . For QPSK, there is SNR improvement of 6 dB forε = 0.15 at α= 6.4.

Keywords

AWGN channels; OFDM modulation; discrete Fourier transforms; error statistics; intercarrier interference; quadrature phase shift keying; AWGN channel; BER; BPSK modulation scheme; CFO; DFT-OFDM system; FRFT; ICI; QPSK modulation scheme; bit error rate; closed form relation; gain 13.82 dB; gain 2.1 dB; intercarrier interference; noise figure 0.53 dB; noise figure 0.76 dB; noise figure 6 dB; normalized carrier frequency offset; power for fractional Fourier transform; AWGN channels; Binary phase shift keying; Bit error rate; Fourier transforms; OFDM; BER; CFO; FRFT-OFDM; ICI; OFDM;

fLanguage

English

Publisher

ieee

Conference_Titel

Advance Computing Conference (IACC), 2013 IEEE 3rd International

Conference_Location

Ghaziabad

Print_ISBN

978-1-4673-4527-9

Type

conf

DOI

10.1109/IAdCC.2013.6514313

Filename

6514313