Regular Section
A Novel Search and Selection Method for Spreading Code of UWB System and Its Application to IEEE 802.15.4a IR-UWB System
2009 年 E92.B 巻 2 号 p. 675-678
詳細
2009 年 E92.B 巻 2 号 p. 675-678
In this paper, we propose a novel search and selection method for spreading code set of UWB system and apply it to IEEE 802.15.4a IR-UWB system. To find a spreading code with low spectral peak to average ratio (SPAR) and good auto-correlation property, the proposed method searches spreading codes in the frequency domain based on the time-frequency relation of the spreading code. Using evaluation parameters, we selected the code set which had SPAR reduced about 1.1079dB, Golay merit factor (GMF) improved by 49% and almost the same modified Golay merit factor (MGMF) compared to the code set used as preambles for IR-UWB system.
