Fast-OFDM-based intensity-modulation and direct-detection (IM/DD) has been proposed for deployment of cost-efficient optical access networks, due to its implementation simplicity high spectral efficiency. In this article, the accuracy generalised memory polynomial (GMP) non-linear modelling Fast-OFDM links is studied, including effects considering different model parameters. After validation us...

This paper introduces a novel OFDM system base on dual – tree complex wavelet transform (DT-CWT). In the proposed scheme, DT-CWT is used in the place of FFT. The proposed scheme offers the best PAPR performance than the conventional OFDM and WPM systems at the expense of acceptable computational complexity without using any pruning techniques. The CCDF for the proposed scheme signal achieves ab...

For an orthogonal frequency division multiplexing (OFDM) system, frame synchronization is achieved by forcing the receiver to start its FFT at the right time. One way in which this may be achieved is to precede the OFDM data with a special synchronization symbol. In this paper two synchronization symbols are proposed to achieve frame synchronization for an OFDM-based indoor wireless data transm...

ABSTRACT: Several new generation wideband data communication systems nowadays, have adopted Orthogonal Frequency division Multiplexing technique. FFT/IFFT is one of the main kernel in the OFDM system, therefore, special attention needs to be given to optimize the FFT block. Hence, utilizing low power, area efficient as well as high speed multipliers and adders in Fast Fourier Transform will ens...

Due to its good orthogonality, slantlet transform (SLT) is used in orthogonal frequency division multiplexing (OFDM) systems to reduce intersymbol interference (ISI) and intercarrier interference (ICI). This eliminates the need for cyclic prefix (CP) and increases the spectral efficiency of the design. Finite Radon transform (FRAT) mapper has the ability to increase orthogonality of subcarriers...

This paper presents a high-throughput lowcomplexity 512-point eight-parallel mixed-radix multipath delay feedback (MDF) fast Fourier transform (FFT) processor architecture for orthogonal frequency division multiplexing (OFDM) applications. To decrease the number of twiddle factor (TF) multiplications, a mixed-radix 2/2 FFT algorithm is adopted. Moreover, a dual-path shared canonical signed digi...

The FFT(Fast Fourier Transform) processing is one of the key procedure in the popular orthogonal frequency division multiplexing(OFDM) based communication system such as Digital Audio Broadcasting(DAB),Digital Video Broadcasting Terrestrial(DVB-T),Asymmetric Digital Subscriber Loop(ADSL) etc.These application domain require performing FFT in various size from 64 to 8192 point. Implementing each...

Present day wireless communication systems demand for high data rates. Orthogonal frequency division multiplexing (OFDM) has emerged as a promising technology to provide these high data rates. OFDM is a digital modulation technique which divides the available spectrum into different sub bands. As a result data can be transmitted simultaneously using multiple subcarriers. Conventional OFDM is ba...

In this paper, the problem of frame synchronization in orthogonal frequency division multiplexing (OFDM) system is considered. For an OFDM system, frame synchronization is achieved by forcing the receiver to start its FFT at the right time. One way in which this may be achieved is to precede the OFDM data with a special synchronization symbol. Two synchronization symbols are proposed to achieve...

An Orthogonal Frequency Division Multiplexing (OFDM) scheme offers high spectral efficiency and better resistance to fading environments. In OFDM the data is modulated using multiple numbers of sub-carriers that are orthogonal to each other because of which the problems associated with other modulation schemes such as Inter Symbol Interference (ISI) and Inter Carrier Interference (ICI) are redu...