Title :
DCT based OFDM for Underwater Acoustic Communication
Author :
Kumar, Prashant ; Kumar, Preetam
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol. Patna, Patna, India
Abstract :
Discrete Cosine Transform based Orthogonal Frequency Division Multiplexing (DCT-OFDM) is proposed for the first time for Underwater Acoustic Communication. Underwater acoustic channels are characterized as doubly spread channels in time and frequency. The orthogonality feature of conventional OFDM is also provided by inverse DCT (IDCT)-DCT structure with the added advantages of reduced implementation area and increased computational speed as only real calculations is required. This system provide higher peak to average power ratio (PAPR) reduction and achieve better noise immunity and hence better bit error rate (BER) performance than standard OFDM, while maintaining a low implementation cost. Simulation results show noticeable improvement in the performance.
Keywords :
OFDM modulation; discrete cosine transforms; error statistics; telecommunication channels; underwater acoustic communication; BER performance; IDCT structure; OFDM; PAPR reduction; bit error rate performance; discrete cosine transform; doubly spread channels; inverse DCT structure; orthogonal frequency division multiplexing; peak to average power ratio reduction; underwater acoustic communication; Discrete Fourier transforms; Discrete cosine transforms; Fading; Peak to average power ratio; Underwater acoustics; BER; DCT-OFDM; OFDM; PAPR; Underwater acoustic channel; doubly-selective channel;
Conference_Titel :
Recent Advances in Information Technology (RAIT), 2012 1st International Conference on
Conference_Location :
Dhanbad
Print_ISBN :
978-1-4577-0694-3
DOI :
10.1109/RAIT.2012.6194500
