Abstract
Ofdm Is A Multicarrier Transmission System Which Is Used In Many Modern And Emerging Communication Standards Such As Dvb, Wireless Local Area Networks Etc. The Conventional Ofdm System Uses Fft As Their Basic Building Block. The Disadvantages Of Fft Ofdm Are The Addition Of Cyclic Prefixes Between The Carriers Which Consumes More Bandwidth. Our Proposed Work Makes Use Of The Dwt Principle To Generate Ofdm Which Improves The Bandwidth Without Cyclic Prefix. The System Is Designed, Especially Under The Presence Of Phase Noise To Study Its Effect. Ldpc Encoding Technique Is Used To Reduce The Phase Noise Of The Proposed System. Different Wavelet Transforms Performance Is Compared With Fft Ofdm. The Results Clearly Show That Dwt Excels Fft. Index Terms: Ofdm, Fft, Dwt. Phase Noise, Ber, Ldpc.
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