A Study of Different Angles for Higher Order Rotation Spreading Matrix for BSOFDM in UWB Channels

Abstract

This paper presents a study into different angles for higher order Rotation spreading matrix developed for BSOFDM. It was shown previously that for block size M = 2 that the angle α = π/3 achieved the best result in terms of BER in UWB channels. It was discovered that this was no longer the case when the higher order Rotation spreading matrix was used for larger M sized blocks and that other angles produced better results which proves that the Rotation spreading matrix advantage over existing spreading matrices such as the Hadamard is its flexibility to be adapted to different communication systems.

A new approach to BSOFDM - parallel concatenated spreading matrices OFDM

“…3) Rotation Spreading Matrix: The Rotation spreading matrix for BSOFDM was proposed in [1] and a number of variations and studies carried out [6], [7], [8], [9] and its structure is as follows for U 2 = 2 × 2,…”