The power consumption is an essential issue for designers of mobile devices. Orthogonal Frequency Division Multiplexing (OFDM) suffers from its Peak – to – Average Power Ratio (PAPR) problem. The Discrete Fourier Transmission Spread OFDM (DFTS-OFDM) based on Single Carrier Frequency Division Multiple Access (SC-FDMA) has been widely adopted due to its lower peak-to-average power ratio (PAPR) of...

Filter bank multi-carrier (FBMC) is considered a promising alternative to the Orthogonal Frequency Division Multiplexing (OFDM) scheme. It improves spectral efficiency by eliminating need for cyclic prefix while attenuating interference due robustness of out-of-band emission. In this work, we present framework, and performance evaluation FBMC modulation scheme direct detection optical communica...

Recently time-frequency interferometry (TFI)OFDM has been proposed as a channel identification scheme. TFI-OFDM system can multiplex the same impulse response in twice on the time domain without overlapping to each other. In this case, the required pilot signal is only one. Moreover, by averaging of these impulse responses, the accurated channel impulse responses are obtained. However, if the t...

AbstractPerformance of Orthogonal Frequency Division Multiplexing (OFDM) systems using Fast Fourier Transforms (FFT) and Discrete Wavelet Transform (DWT) are analyzed in this paper. The performance of DWT-OFDM is assessed by various parameters such as BER, eye diagram and constellation diagram. BER is the ratio of the no. of bits with error to the total no. of bits transmitted through the chann...

Orthogonal frequency division multiplexing is a type of multicarrier modulation technique which is used in wireless communication. OFDM can be used in various wireless and wired application such Digital audio broadcasting, digital video broadcasting & wireless LAN. The Performance of OFDM system depends on various parameters such as using different transform, different modulation and by putting...

Orthogonal frequency-division multiplexing (OFDM) has been selected as the basis for fifth-generation new radio (5G NR) waveform developments. However, effective signal processing tools are needed enhancing OFDM spectrum in various advanced transmission scenarios. In earlier work, we have shown that fast-convolution (FC) is a very flexible and efficient tool filtered-OFDM generation receiver-si...

A unique feature of the OFDM communication scheme is that, due to the IFFT at the transmitter and the FFT at the receiver, the frequency selective fading channel is converted into flat fading channels. However the OFDM approach can suffer from CFO (Leke and Cioffi 1998). The effects of CFO has been analyzed quite extensively in Beek et al (1997) and Jungwon Lee et al (2006). Carrier Frequency e...