Title :
Robust and Accurate Packet Detection and Frequency Offset Compensation for CSS System
Author :
Jang, Seong-Hyun ; Baik, Seung-Han ; Kim, Yeong-Sam ; Chong, Jong-Wha
Author_Institution :
Dept. of Electr. & Comput. Eng., Hanyang Univ., Seoul, South Korea
Abstract :
In this paper, we propose a new robust packet detection and frequency offset compensation structure for IEEE 802.15.4a chirp spread spectrum (CSS) which is a standard for wireless personal area network (WPAN). The proposed structure takes benefits of both cross- and auto-correlation. Cross-correlation is useful to remove additional side band noise in the CSS system and to find sharp peaks among filtered output values. In addition, we use the auto-correlation in order to suppress the effect of frequency offset and the initial channel phase. Simulation results show that the proposed procedure is robust to the frequency offset, and can detect the presence of a signal in very low signal to noise ratio (SNR).
Keywords :
chirp modulation; packet radio networks; personal area networks; spread spectrum communication; wireless LAN; CSS system; chirp spread spectrum; frequency offset compensation; robust packet detection; signal to noise ratio; wireless personal area network; Autocorrelation; Cascading style sheets; Chirp; Detection algorithms; Energy consumption; Frequency; Matched filters; Noise robustness; Personal area networks; Signal to noise ratio; CSS; frequency offset; matched filter; packet detection;
Conference_Titel :
Mobile Ubiquitous Computing, Systems, Services and Technologies, 2009. UBICOMM '09. Third International Conference on
Conference_Location :
Sliema
Print_ISBN :
978-1-4244-5083-1
Electronic_ISBN :
978-0-7695-3834-1
DOI :
10.1109/UBICOMM.2009.42
