Two-valued 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:
SSIP'07 Proceedings of the 7th WSEAS International Conference on Signal, Speech and Image Processing
Year:
2007

Citing 1
Cited 1

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

WSEAS TRANSACTIONS on COMMUNICATIONS

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Abstract

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 code 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 distortions on amplitude limitation and quantization, and the interchannel and intersymbol interferences.