Performance Analysis of Orthogonal Frequency Division Multiplexing (OFDM) System by using Peak to Average Power Ratio (PAPR) Algorithm [ READ ]
Md. Selim Hossain, Md. Mahasin Ali, Md.Biplob Hossain, Md. Dulal Haque and Md. Abubakar Siddik
Orthogonal Frequency Division Multiplexing (OFDM) is an efficient method of data transmission for high speed communication systems. The basic principle of OFDM is to split a high-rate data stream into a number of lower rate streams that are transmitted over a number of subcarriers. OFDM has several characteristics such as providing greater immunity to multipath fading & impulse noise improves the bandwidth efficiency. But, OFDM suffers a serious drawback of high peak to average power ratio (PAPR). There are several methods has been proposed to reduce PAPR, clipping and filtering is one of them. But the existing Clipping and filtering method has in-band and out-band losses that degrade the system performance. So we proposed a new algorithm called pumping based clipping method to reduce these losses and increase system efficiency. In this method the input signal is first pumped by an amplifier circuit that increases only the amplitude but doesn’t power of this signal. After that an anti peak signal is generated by Gaussian function. Then the pumping signal is clipped by the anti peak signal to get clipping signal. By pumping the input signal before clipping is reduce the in-band and out-band losses and Peak to Average Power Ratio (PAPR) of the system. Hence the Bit Error Rate (BER) as well as the overall system performance is increased by this method.
Md. Selim Hossain, Md. Mahasin Ali, Md.Biplob Hossain, Md. Dulal Haque and Md. Abubakar Siddik
Orthogonal Frequency Division Multiplexing (OFDM) is an efficient method of data transmission for high speed communication systems. The basic principle of OFDM is to split a high-rate data stream into a number of lower rate streams that are transmitted over a number of subcarriers. OFDM has several characteristics such as providing greater immunity to multipath fading & impulse noise improves the bandwidth efficiency. But, OFDM suffers a serious drawback of high peak to average power ratio (PAPR). There are several methods has been proposed to reduce PAPR, clipping and filtering is one of them. But the existing Clipping and filtering method has in-band and out-band losses that degrade the system performance. So we proposed a new algorithm called pumping based clipping method to reduce these losses and increase system efficiency. In this method the input signal is first pumped by an amplifier circuit that increases only the amplitude but doesn’t power of this signal. After that an anti peak signal is generated by Gaussian function. Then the pumping signal is clipped by the anti peak signal to get clipping signal. By pumping the input signal before clipping is reduce the in-band and out-band losses and Peak to Average Power Ratio (PAPR) of the system. Hence the Bit Error Rate (BER) as well as the overall system performance is increased by this method.
