IOSR Journal of Electronics and Communication Engineering (IOSR-JECE) e-ISSN: 2278-2834,p- ISSN: 2278-8735.Volume 10, Issue 4, Ver. III (Jul - Aug .2015), PP 56-59 www.iosrjournals.org DOI: 10.9790/2834-10435659 www.iosrjournals.org 56 | Page Efficient Performance analysis of OFDM based DAB systems Using Reed Solomon coding technique Pooja Jain 1 Sandhya Sharma 2 1. M.Tech Scholar, ECE, Suresh Gyan Vihar University, Jaipur (India) 1. Associate professor,, ECE, Suresh Gyan Vihar University, Jaipur (India) Abstract: DAB (digital audio broadcasting) is a radio system which is depends on EUREKA-147 project. This project was designed by the Members of European Broadcasting Union (EBU). DAB System depends on wireless communication. DAB channel estimation was designed by the OFDM technology that reduces co- channel interference and multipath fading. In this paper we have analyzed bit error rate performance v/s signal to noise ratio (BER v/s SNR).for DAB modes we done block coding with the help of MATLAB Simulink tool. In this paper we use 16-QAM modulation technique and reed-Solomon convolution coding. Keywords: DAB, OFDM, co-channel interference, multipath fading, BER, SNR, MATLAB and 16-QAM. I. Introduction Radio broadcasting is one of the most widespread electronic mass media comprising of hundreds of programmer providers, thousands of HF transmitters and billions of radio receivers worldwide. The new digital radio system Digital Audio Broadcasting (DAB) has the capability to replace the existing AM and FM audio broadcast services in many parts of the World in near future. This was developed in the 1990s by the Eureka 147 DAB project. DAB is very well suited for mobile receivers and provides very high tolerance against multipath reception and inter symbol interference (ISI). It allows use of single frequency networks (SFNs) for high frequency efficiency. In several countries in Europe and overseas, broadcasting organizations, network providers and receiver manufacturers are already implementing digital broadcasting services using the DAB system. Perceptual audio coding (MPEG-2), Coded Orthogonal Frequency Division Multiplexing (COFDM), provision for the multiplex of several programmers and data transmission protocols, are the new concepts of digital radio broadcasting. In this paper we proposed a reed-Solomon based channel coding technique for improve performance of DAB system in different transmission channel. In this paper we consider 16-QAM modulation technique and OFDM signal generator. For the DAB block coding we use IFFT (inverse fast Fourier transform), FEC (forward error correction), and frequency interleaving, fading or non-fading channels. Here DAB transmitter sides we use convolution encoding (reed- Solomon) so must be required Viterbi decoder at receiver side. II. Overview Of Dab System Digital Audio Broadcasting (DAB) is a new digital radio system that delivers radio services from the studio to the receiver. DAB is intended to deliver very high quality digital audio programmers and data services to fixed, mobile and portable receivers which can use simple whip antennas. DAB uses COFDM technology that makes it resistant to Multipath fading and inters symbol interference (ISI). FM reception can be badly affected by shadowing [3] (i.e. the blocking or screening of the signals by tall buildings and hills which lie in the direction of the transmitter) and by passive echoes (the arrival at the receiver of delayed “multipath” signals which have been reflected from tall buildings and hills). DAB is tolerant to all these types of interferences with the use of simple whip antenna. The multipath effect like Doppler spread, diffraction, reflection etc., is absent in DAB since it employs advanced digital techniques such as OFDM multicarrier modulation, rate-compatible punctured convolution codes (RCPC) and time-frequency interleaving. (A) Source coding: Source coding of DAB specified MPEG-2 audio layer encoding. Audio coding system codes only audio signal components that the ear will hear. This technique allows a bit rate reduction 768 Kbit/s down to about 100 Kbit/s per mono channel, while preserving the subjective quality of the digital audio signal. DAB to use spectrum more efficiently and delivering high quality sound to the listeners and receiver. All type coding is used for data encryption, data decryption and data compression according to the sender and receiver.