Title :
Multicode CDMA/CI for multimedia services over LEO satellite channel
Author :
Kapoor, Ravikant ; Kumar, Pranaw
Author_Institution :
Electr. Eng. Dept., Indian Inst. of Technol. Patna, Patna, India
Abstract :
Multicode CDMA is a promising scheme to support multirate services for multimedia communication. In this paper, a novel multicode CDMA scheme using Carrier Interferometry (CI) codes has been proposed to support multirate services over LEO satellite channel. It is observed that use of CI codes not only help in mitigating multiple access interference but also reduces the Peak to Average Power Ratio (PAPR) compared to Walsh Hadamard (WH) codes. The percentage of symbols with PAPR greater than 9 dB is reduced from 80% to 10% by employing CI codes for data rate sixteen times the basic data rate. Also, at elevation angle of 30°, high rate user observes as much as 8 dB SNR gain using CI codes. Additionally, orthogonal CI codes with arbitrary integer length can be generated.
Keywords :
Hadamard codes; code division multiple access; interference suppression; interferometry; multimedia communication; orthogonal codes; satellite communication; telecommunication services; LEO satellite channel; PAPR reduction; WH codes; Walsh Hadamard codes; arbitrary integer length; carrier interferometry codes; data rate; high rate user; low earth orbit satellite channel; multicode CDMA-CI; multimedia communication; multimedia services; multiple access interference mitigation; multirate services; orthogonal CI codes; peak to average power ratio reduction; Error correction; Error correction codes; Europe; Low earth orbit satellites; Multiaccess communication; Peak to average power ratio; Signal to noise ratio; Carrier Interferometry; DS-CDMA; Interference Mitigation; LEO satellite; Multicode; Multirate; PAPR Reduction; land mobile satellite channel;
Conference_Titel :
Advances in Computing, Communications and Informatics (ICACCI, 2014 International Conference on
Conference_Location :
New Delhi
Print_ISBN :
978-1-4799-3078-4
DOI :
10.1109/ICACCI.2014.6968464
