Abstract
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 1.1079 dB, 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.
| Original language | English |
|---|---|
| Pages (from-to) | 675-678 |
| Number of pages | 4 |
| Journal | IEICE Transactions on Communications |
| Volume | E92-B |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 2009 |
Keywords
- IR-UWB
- Spectral peak to average ratio
- Spreading code