Title :
Dynamic Frequency Selection (DFS) in IEEE802.16e OFDM System Working at Unlicensed Bands
Author :
Dong, Guojun ; Chen, Hong ; Yang, Min ; Dai, Jufeng
Author_Institution :
Sch. of Electron. Inf. Eng., Tianjin Univ.
Abstract :
This paper investigates the dynamic frequency selection (DFS) scheme in IEEE 802.16e OFDM (orthogonal frequency division multiplexing) system working at unlicensed bands. Working at unlicensed bands, the IEEE 802.16e OFDM system devices are liable to suffer from additional interference generated by physical channel collision. The DFS is a good mechanism to overcome this co-existence issue, and is mandatory for unlicensed bands operation in IEEE 802.16e specification. Compared with the static frequency selection scheme defined in IEEE 802.16e specification, a particular DFS scheme is proposed for unlicensed bands operation. The Simulation results prove that the performances of system capacity and BER of the IEEE 802.16e OFDM system are improved greatly using the proposed DFS scheme.
Keywords :
OFDM modulation; broadband networks; mobile radio; radio access networks; wireless channels; IEEE 802.16e OFDM system; dynamic frequency selection; orthogonal frequency division multiplexing; physical channel collision; static frequency selection scheme; unlicensed bands; Bit error rate; Delay; Interference; Licenses; OFDM modulation; Partitioning algorithms; Robustness; Transceivers; Vehicle dynamics; Wireless communication; BER; Dynamic Frequency Selection (DFS); OFDM; System Capacity;
Conference_Titel :
Advanced Communication Technology, The 9th International Conference on
Conference_Location :
Gangwon-Do
Print_ISBN :
978-89-5519-131-8
DOI :
10.1109/ICACT.2007.358603
