Two-valued integrand coding transmission of multi-rate quasi-synchronous CDMA signals convolved by real-valued self-orthogonal finite-length sequences

Authors:
Jiong Le;Yoshihiro Tanada
Affiliations:
Yamaguchi University, Ube, Yamaguchi, Japan;Yamaguchi University, Ube, Yamaguchi, Japan
Venue:
WSEAS TRANSACTIONS on COMMUNICATIONS
Year:
2008

Citing 3
Cited 0

Orthogonal Set of Huffman Sequences and Its Application to Suppressed-Interference Quasi-Synchronous CDMA System*This paper was presented at the Second International Workshop on Sequence Design and Applications in Communications (IWSDA'05), in Shimonoseki, Japan, during October 10--14, 2005.

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Two-valued coding transmission of multi-rate quasi-synchronous CDMA signals convolved by real-valued self-orthogonal finite-length sequences

SSIP'07 Proceedings of the 7th WSEAS International Conference on Signal, Speech and Image Processing
Convolutional data transmission system using real-valued self-orthogonal finite-length sequences

ACOS'06 Proceedings of the 5th WSEAS international conference on Applied computer science

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Abstract

The next generation mobile communication system is desired to transmit multimedia information at multi-rate. Two-valued integrand codes are applied to the realization of the multi-rate quasi-synchronous CDMA system using real-valued self-orthogonal finite-length sequences with zero correlation zone. Each user data of multi-level and multi-interval and a common synchronizing sequence are convolved with the user sequence and converted to two-valued integrand coding signal. The signal passes through low pass filters in a transmitter and a receiver and is changed to a real-valued signal. In the receiver, the desired data are detected by the correlation processing with the respective code. This transmission system suppresses distortion on amplitude limitation and quantization, and interchannel and intersymbol interferences. Two-valued integrand coding contributes to easy amplification and modulation.