Frequency Speech Scrambler based on Hartley Transform and OFDM Algorithm
نویسندگان
چکیده
منابع مشابه
An Analytical Approach for Efficient OFDM Modulator and Demodulator Communication Systems Based On Discrete Hartley Transform
The main drawback of OFDM is its high peak to average power ratio (PAPR). High PAPR of OFDM makes it unusable in non-linear systems. So the clipping signals scheme is one useful and simple method to reduce the PAR. In the widely used OFDM (Orthogonal Frequency Division Multiplexing) systems, the FFT and IFFT pair are used to modulate and demodulate the data constellation on the subcarriers. Thi...
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In many wireless network applications Optical Orthogonal Frequency Divison Multiplexing (O-OFDM) plays an important role. It is a promising modulation technique for handling rapidly growing internet traffic. But higher peak to average power ratio (PAPR) is a major drawback in O-OFDM systems, which in results increases the complexity of digital to analog converters (DAC) and analog to digital co...
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Recent advances in wireless communication systems have made use of OFDM technique to achieve high data rate transmission. The sensitivity to frequency offset between the carrier frequencies of the transmitter and the receiver is one of the major problems in OFDM systems. This frequency offset introduces inter-carrier interference in the OFDM symbol and then the BER performance reduced. In this ...
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ژورنال
عنوان ژورنال: International Journal of Computer Applications
سال: 2013
ISSN: 0975-8887
DOI: 10.5120/9952-4599