Title :
Using different orthogonal code sets for CCK modulation to mitigate co-channel interference among WLANs
Author :
Xu, Xiaohui ; Zhang, Chao ; Lin, Xiaokang
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
In 802.11b wireless local area network (WLAN), the performance decreases drastically when co-channel interference among adjacent basic service sets (BSS) occurs. This paper proposes to use different and nearly orthogonal code sets for complementary code keying (CCK) modulation in adjacent BSSs. Using this modified different orthogonal code sets CCK (DOC-CCK) modulation, the adjacent BSSs are separated one from another to a certain extent. Therefore, the co-channel interference among BSSs is mitigated. Simulation results show that the proposed DOC-CCK is more effective than normal CCK to combat co-channel interference in both AWGN and multi-path fading channels when WLAN operates with data rate of 5.5 Mbps.
Keywords :
AWGN channels; channel coding; cochannel interference; fading channels; modulation coding; multipath channels; wireless LAN; 5.5 Mbit/s; 802.11b wireless local area network; AWGN; WLAN; basic service sets; cochannel interference; complementary code keying modulation; different orthogonal code set modulation; multipath fading channels; orthogonal code sets; AWGN; Chaos; Code standards; Data communication; Fading; Interchannel interference; Modulation coding; Phase modulation; Production facilities; Wireless LAN;
Conference_Titel :
Communications and Information Technology, 2005. ISCIT 2005. IEEE International Symposium on
Print_ISBN :
0-7803-9538-7
DOI :
10.1109/ISCIT.2005.1567008
