Title :
Use of convolution coding for improving SER performance of OFDM system
Author :
Adnan, Tariq ; Masood, Ammara
Author_Institution :
Sch. of Electr. Eng., Univ. of New South Wales, Sydney, NSW, Australia
Abstract :
The paper describes the transmission of BPSK signals in an OFDM system with 64-point IFFT at transmitter and FFT at receiver. The channel over which transmission will take place is ISI Rayleigh fading channel given by 2 tap channel model with path delay [0, 0.5] μs. The sampling frequency of OFDM is to be kept at 20MHz. Cyclic prefix for OFDM is calculated for improving bandwidth efficiency of the system. First, the symbol error rate (SER) of un coded OFDM system is plotted as a function of SNR via simulation in MATLAB and then the result is compared with coded OFDM system´s SER plot, where the coding is provided by ½ rate convolution encoder accompanied by viterbi decoder at the receiver side.
Keywords :
OFDM modulation; Rayleigh channels; Viterbi decoding; convolutional codes; fast Fourier transforms; intersymbol interference; phase shift keying; radio receivers; radio transmitters; BPSK signal transmission; IFFT; ISI Rayleigh fading channel; MATLAB; OFDM system; Viterbi decoder; convolution coding; cyclic prefix; frequency 20 MHz; radio receiver; radio transmitter; sampling frequency; symbol error rate; Convolution; Decoding; Delay; Demodulation; Mathematical model; OFDM; Signal to noise ratio; Coding; Cyclic Prefix; Fading; ISI; OFDM; SER;
Conference_Titel :
Communication Software and Networks (ICCSN), 2011 IEEE 3rd International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-61284-485-5
DOI :
10.1109/ICCSN.2011.6013944
