This work discusses the characteristics of a multicore processor to perform DMT/OFDM modulation, while eventually executing other concurrent tasks. The DMT modulation is of special interest because it has been adopted in several communication systems. As a case study, the TMS320C6670 is adopted, which has a (I)FFT coprocessor. The use of these coprocessors can be essential to make a DMT/OFDM fe...

The high data rate Orthogonal Frequency Division Multiplexing (OFDM) with high spectral efficiency and its ability to soften the possessions of multipath makes them appropriate in wireless application. Impulsive noise twists the OFDM transmission and thus methods must be explored to conquer this noise consequence. Various efficient impulsive noise reduction schemes are already proposed for low ...

In this paper a novel multicarrier modulation system called Complex Wavelet Packet Modulation (CWPM) has been proposed. It is based on using the Complex Wavelet Transform (CWT) together with the Wavelet Packet Modulation (WPM). The proposed system has been tested for communication over flat and frequency selective Rayleigh fading channels and its performance has been compared with some other mu...

Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier modulation technique which is already widely employed in both wireless communication systems (WLAN, DVB-T, WiMAX) as well as wireline systems (ADSL, VDSL, PLC). Due to highly increasing speeds and lower costs of electronics, OFDM has recently also gained much interest in optical communication systems. In this paper, we will dis...

Orthogonal Frequency Division Multiplexing(OFDM) is a method in which modulation of signal is done. Orthogonal Frequency Division Multiplexing has become popular technique for transporting large amount of data in both wired and wireless communication. It is a digital modulation technique in which signal is transmitted in parallel mode. As compared to single carrier system OFDM is more unaffecte...

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...

The success of multicarrier modulation in the form of orthogonal-frequency-division-modulation (OFDM) in radio channels illuminates a clear path one could take towards high-rate underwater acoustic communications. However, earlier work on the application of OFDM in underwater has only had limited success. We aim to make OFDM work in underwater and build a practical multicarrier modem prototype....

13 The focus of this review is to provide a thorough study of this link adaptation method particularly adaptive modulation and its related issues in various OFDM systems. The organization of this paper is as follows. Section II gives an overview of a typical OFDM system. Section III reviews significant adaptive modulation approaches contributed by several authors in detail. This section also in...

Orthogonal Frequency Division Multiplexing (OFDM) is one of the latest modulation techniques used in order to combat the frequency-selectivity of the transmission channels, achieving high data rate without inter–symbol interference. The basic principle of OFDM is gaining a wide spread popularity within the wireless transmission community. Furthermore, OFDM is one of the main techniques proposed...

Orthogonal Frequency Division Multiplex (OFDM) is recently widely used in many wireless and wire line communication systems. The parallelism between RS code and OFDM modulation with consecutive suppressed carriers is known. In this paper the capability of OFDM modulation to act as an error correcting code is analyzed if used for transmission over channel with impulsive noise. New decoding algor...