Abstract
This paper presents a comparison study between the fast Fourier transform based orthogonal frequency division multiplexing (FFT-OFDM), the discrete cosine transform based orthogonal frequency multiplexing (DCT-OFDM) and the discrete wavelet transform based orthogonal frequency multiplexing (DWT-OFDM) for the transmission of chaotic and AES (Advanced encryption standard) encrypted images. Concentration in the paper is on the transmission of encrypted images for the purpose of high definition television (HDTV) broadcasting. This comparison study is held to determine the best one suitable for HDTV broadcasting of encrypted images. The encryption approach adopted in this paper is based on chaotic Baker maps because the encoding and decoding steps in this approach are simple and fast enough for HDTV applications. This approach belongs to the family of fast permutation algorithms. And AES is also discussed where it's algorithm has very good performance in both hardware and software implementations. It also has very low memory requirements, and the algorithm's internal round structure benefits from instruction level parallelism. This ability will improve its performance. The different types of channels and the different parameters of OFDM modulation are considered in the comparison. The experimental results reveal the superiority of the FFT-OFDM over the DCT-OFDM for the transmission of encrypted images.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
