OFDM Modulation Using Verilog

Vinaykumar Ankireddy¹

¹Assistant Professor, CJITS, Jangaon, Warangal, AP, India

Abstract

In order to improve the transmission velocity in multipath fading wireless channel, the high speed OFDM technology receives increasing attentions in mobile communication. The growth of mobile communications and wireless Internet access has produced a strong demand for advanced wireless techniques. The challenges for wireless communication designs come from the detrimental characteristics of wireless environments, such as multipath fading, Doppler effect, co-channel interference, and intentional jamming in military communications. In this OFDM base band modulation consists of from scrambler, encoder, Serial to Parallel converter, interleaver and Sub carrier modulation (mapping). Sub carrier modulation mostly uses three modes that are BPSK (Binary phase shift keying), QPSK (QuadriPhase Shift Keying) and QAM QAM-4, QAM-6. Interleaver is to disperse lost information to decrease error bit rate, in other words, when user information bits are lost among transmission process. Experimental results indicate that setup time corresponding to transmission velocity and steady time is approximately doubled as setup time, that is, not only achieving the high speed transmission, but also supplying adequate modulation time.

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Cite this Article as Follows

Vinaykumar Ankireddy. OFDM Modulation Using Verilog. International Conference on Information Engineering, Management and Security 2014. Vol. 1. Chennai: Association of Scientists, Developers and Faculties, 2014. 315-319. Print.