Abstract A possible problem of orthogonal frequency division multiplexing (OFDM) is its high peak-to-average power ratio (PAPR). Recently, the single carrier (SC) transmission system with frequency-domain equalization is attracting much attention. In this paper, a novel approach to alleviate the PAPR problem of OFDM is proposed. A generalized OFDM (GOFDM) with frequency-domain equalization is p...

Orthogonal Frequency Division Multiplexing (OFDM) uses as a high speed information transmission technology with excellent anti-interference capabilities. High Peak-to-Average Power Ratio (PAPR) of transmitted signal is one of the major drawbacks in Orthogonal Frequency Division Multiplexing (OFDM) systems. To overcome the drawback of high PAPR of transmitted signal we propose the novel based pa...

Orthogonal frequency division multiplexing (OFDM) is a special case of multicarrier transmission and frequency division multiplexing, where a single data stream is transmitted over several lower rate subcarriers, placed orthogonal to each other. Today it is becoming the chosen modulation technique for wireless communications. It can provide large data rates with optimum bit error rate and enoug...

Orthogonal frequency-division multiplexing (OFDM) systems are highly sensitive to synchronization errors. In this paper, we introduce an algorithm for the blind estimation of symbol timing and carrier frequency offset in wireless OFDM systems. The proposed estimator is an extension of the Gini–Giannakis estimator for single-carrier systems. It exploits the cyclostationarity of OFDM signals and ...

Two Per-Antenna-Coding (PAC) receiver schemes for Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) are described and compared in this paper. In MIMO, the data to transmit are multiplexed onto different antennas. With PAC (sometimes called horizontal coding), these different data streams are encoded separately. For the receiver, two schemes are proposed to ...

I. INTRODUCTION Orthogonal frequency-division multiplexing (OFDM) [1] is one of the promising techniques for very high-speed data transmissions in a severe frequency-selective fading channel [2]. However, since OFDM uses a numerous number of narrowband orthogonal subcarriers to transmit data in parallel, the problem of high peak-to-average power ratio (PAPR) arise. To alleviate the PAPR problem...

In this paper, it is proposed that to achieve higher data rates and to combat to effect of multipath propagation, orthogonal frequency division multiplexing system (OFDM) is a promising technique. OFDM allows many users to transmit in an allocated carrier. Each user is allocated several carriers in which to transmit their data.The transmission is generated in such a way that the carriers used a...

The wireless system for communication uses the orthogonal frequency division multiplexing in these days. The rapid growth of high data rate transmission makes a need to improve the performance of a network. This can be made easy by using Orthogonal Frequency Division Multiplexing. OFDM is an approach in which the multicarrier transmission technique has been used for wireless communication. Here...

OFDM technology promises to be a key technique for achieving the high data capacity and spectral efficiency requirements for wireless communication systems in future. Fast Fourier transform (FFT) processing is one of the key procedures in popular orthogonal frequency division multiplexing (OFDM) communication systems. A parallel and pipelined Fast Fourier Transform (FFT) processor for use in th...

Orthogonal frequency division multiplexing (OFDM) is a special case of multicarrier transmission, where a single data stream is transmitted over a number of lower ratesubcarriers.4G and other wireless systems are currently hot topics of research and development in the communication field. Orthogonal frequency division multiplexing (OFDM) is the most commonly used modulation scheme for high data...