Open AccessDS‐PAM UWB System Using Non‐linear Chirp Waveform
Author(s) -
Shen Hanbing,
Zhang Weihua,
An Xizhi,
Kwak Kyung Sup
Publication year - 2007
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.07.0506.0033
Subject(s) - narrowband , chirp , waveform , interference (communication) , additive white gaussian noise , electronic engineering , chirp spread spectrum , computer science , spread spectrum , telecommunications , acoustics , direct sequence spread spectrum , physics , engineering , white noise , radar , optics , channel (broadcasting) , laser
We propose a direct‐sequence pulse‐amplitude modulation (DS‐PAM) ultra‐wideband (UWB) system which employs a non‐linear chirp waveform instead of the conventional Gaussian monocycle in this paper. In the approved frequency for UWB, there exist myriad narrowband interferers. Specifically, we focus on the mutual interference between UWB systems and 802.11a WLAN. This paper offers a method to suppress this inband narrowband interference by introducing a kind of non‐linear chirp waveform. Using the proposed non‐linear chirp waveform, the effects of one or more narrowband interference sources with different frequencies can be suppressed. System performance of UWB systems in the narrowband interference environment can be improved. Computer simulations with additive white Gaussian noise successfully demonstrate an increase in performance with the proposed system as compared to traditional linear chirp systems.