scholarly journals Exact SER Analysis of DFrFT-Based QPSK OFDM System over Frequency Selective Rayleigh Fading Channel with CFO

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Atul Kumar ◽  
Maurizio Magarini ◽  
Hem Dutt Joshi ◽  
Rajiv Saxena
Keyword(s):  
Fourier Transform ◽  
Fading Channel ◽  
Orthogonal Frequency Division Multiplexing ◽  
Rayleigh Fading ◽  
Carrier Frequency Offset ◽  
Fractional Fourier Transform ◽  
Rayleigh Fading Channel ◽  
Ofdm System ◽  
Frequency Selective ◽  
Frequency Selective Rayleigh Fading

We present the exact symbol error rate (SER) expression for quadrature phase shift keying (QPSK) modulation in frequency selective Rayleigh fading channel for discrete fractional Fourier transform- (DFrFT-) based orthogonal frequency division multiplexing (OFDM) system in the presence of carrier frequency offset (CFO). The theoretical result is confirmed by means of Monte Carlo simulations. It is shown that the performance of the proposed system, at different values of the DFrFT angle parameter “α,” is better than that of OFDM based on discrete Fourier transform.

scholarly journals Carrier Frequency Offset Effects on OFDM System over Rayleigh Fading Channel

2020 ◽  
Vol 3 (2) ◽  
pp. 45
Author(s):  
N. M. A. E. Dewi Wirastuti ◽  
I.G.A.K. Diafari Djuni Hartawan ◽  
I Made Arsa Suyadnya ◽  
Duman Care Khrisne
Keyword(s):  
Fourier Transform ◽  
Fading Channel ◽  
Orthogonal Frequency Division Multiplexing ◽  
Rayleigh Fading ◽  
Carrier Frequency Offset ◽  
Rayleigh Fading Channel ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Ofdm System ◽  
Modulation And Demodulation

Orthogonal Frequency Division Multiplexing (OFDM) system showed the use of Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT) to perform the baseband modulation and demodulation. So that, it can increase and improve the efficiency of the modulation and demodulation. Currently, the OFDM is being utilized in the field of broadband wireless communication, which transmit signals orthogonally, that increases speed of information transmission. It also has high proficiency with high bandwidth and provide large data rates and robust against the multipath delay spread. On the other hand, there are some issues faced OFDM system which are high Peak Average Power Ratio (PAPR), and sensitive to Phase Noise (PN) and Carrier Frequency Offset (CFO). This paper presents Orthogonal Frequency Division Multiplexing (OFDM) performance evaluation in the presence of CFO with two different environment scenarios were used: an AWGN channel and a Rayleigh fading channel. The simulation was performed to evaluate the effects of CFO based on Bit Error Rate (BER) vs. Energy Bit per Noise Ratio (Eb/No). The results showed that for BER degradation caused by CFO effects have presented in our simulation for both AWGN and Rayleigh fading channel.

Exact BER analysis of FRFT‐OFDM system over frequency selective Rayleigh fading channel with CFO

2013 ◽  
Vol 49 (20) ◽  
pp. 1299-1301 ◽  
Author(s):  
S. Kumari ◽  
S. Kr. Rai ◽  
A. Kumar ◽  
H. D. Joshi ◽  
A. Kr. Singh ◽  
...  
Keyword(s):  
Fading Channel ◽  
Rayleigh Fading ◽  
Rayleigh Fading Channel ◽  
Ofdm System ◽  
Frequency Selective ◽  
Frequency Selective Rayleigh Fading ◽  
Ber Analysis
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