In this paper we describe a novel wavelet based filtered multitone modulation scheme for transmission over broadband wireless channels. The attractive feature of this scheme is its low implementation complexity compared to known filtered multitone modulation architectures that are based on polyphase synthesis and analysis filter banks. Its feasibility has been demonstrated by a prototype hardwa...

We propose a concatenated code structure combined with high-order modulations suitable for implementation with iterative decoders operating at gigabit-persecond (Gbps) data rates. The examples considered in this article are serial/parallel concatenations of Hamming and accumulator codes. Performance results are given for binary phase-shift keyed (BPSK) modulation, quadrature phase-shift keyed (...

This paper presents the environment of the optical fiber and digital information transmission over optical fiber, using signal transformation technique called duobinary modulation technique. We propose a complete duobinary encoder and duobinary decoder that we tested in Matlab simulink R2014B. In the final part, it will be shown a comparison of duobinary modulation technique with on-off keying ...

A tremendous technological transformation during the last two decades has provided a potential growth in the area of digital communication and lot of newer applications and technologies are coming up everyday due to these reasons. Restricting overself to the domain of modulation techniques a brief overview over different analog and digital modulation techniques has been provided in this article...

The main objective of this paper is to analyse the performance of Reed-Solomon code for different digital modulation schemes and with different (n,k) combinations over a Additive White Guassian Noise (AWGN) channel. The simulation model provides error detection and correction using ReedSolomon (RS) Code. The Original message is encoded and decoded using RS Code. MATLAB Simulink model is selecte...

Orthogonal frequency division multiplexing (OFDM) is considered as a one of the essential components in most of recent telecommunication systems. To maintain a high bit rate and provide a high bandwidth, using the OFDM as a modulation format in RoF system is preferred over other modulation formats. In this paper, up-converting a 20 Gb/s and a 30 Gb/s OFDM signal on a 20-GHz microwave carrier ov...

This paper presents a novel data modulation scheme PCCD-OFDM-ASK: the phase continuous context dependent orthogonal frequency division multiplexing amplitude shift keying. The proposed modulation is successfully applied in the mobile payment system. It is used to transmit the digital data over the speech channel of the mobile communication system GSM, as well as CDMA. The main key points of the...

Cognitive radio is considered as one of the main enablers for provisioning dynamic and flexible spectrum/channel allocation in wireless communications. The reliable data transmission over cognitive radio should employ modulation, coding etc. and thus the performance of such a new communication system should be realized. In this paper, we provide the performance analysis of adaptive modulation o...