Study of spread codes with block spread OFDM

This paper presents the study undertaken with block spread OFDM and compares three spreading matrices. The matrices include the Hadamard, Rotated Hadamard and Mutually Orthogonal Complementary Sets of Sequences (MOCSS). The study is carried out for block lengths of M = 2, M = 4 and M = 8 and it shows that all the spreading matrices show improvement and a better performance over the conventional OFDM over frequency selective channel as expected. As the size of M increased the spreading matrices which have better orthogonal qualities show greater improvement. Disciplines Physical Sciences and Mathematics Publication Details Raad, I., Huang, X. & Lowe, D. (2006). Study of spread codes with block spread OFDM. Proceedings of the First IEEE International Conference on Wireless Broadband and Ultra-wideband Communications Sydney: University of Technology Sydney. This conference paper is available at Research Online: http://ro.uow.edu.au/infopapers/2902 STUDY OF SPREAD CODES WITH BLOCK SPREAD OFDM Ibrahim S. Raad, Xiaojing Huang, Darryn Lowe School of Electrical, Computer and Telecommunications Engineering University of Wollongong, Wollongong, N.S.W Australia [email protected] ABSTRACT This paper presents the study undertaken with block spread OFDM and compares three spreading matrices. The matrices include the Hadamard, Rotated Hadamard and Mutually Orthogonal Complementary Sets of Sequences (MOCSS). The study is carried out for block lengths of M = 2, M = 4 and M = 8 and it shows that all the spreading matrices show improvement and a better performance over the conventional OFDM over frequency selective channel as expected. As the size of M increased the spreading matrices which have better orthogonal qualities show greater improvement. 1 Key Words-OFDM, Spreading Matrices, Block SpreadOFDM, Golay-Paired Hadamard Matrix.This paper presents the study undertaken with block spread OFDM and compares three spreading matrices. The matrices include the Hadamard, Rotated Hadamard and Mutually Orthogonal Complementary Sets of Sequences (MOCSS). The study is carried out for block lengths of M = 2, M = 4 and M = 8 and it shows that all the spreading matrices show improvement and a better performance over the conventional OFDM over frequency selective channel as expected. As the size of M increased the spreading matrices which have better orthogonal qualities show greater improvement. 1 Key Words-OFDM, Spreading Matrices, Block SpreadOFDM, Golay-Paired Hadamard Matrix.