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WLAN smart antenna with Bluetooth interference reduction

WLAN smart antenna with Bluetooth interference reduction

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Because of the coexistence of wireless local area network (WLAN) and Bluetooth at the same ISM band, WLAN systems cannot eliminate the interference by Bluetooth in the physical layer by carrier sense multiple access/collision avoidance. A novel smart antenna system for the WLAN systems to suppress the Bluetooth interference is proposed. The proposed smart antenna system employs the property of multi-carrier transmission of an orthogonal frequency-division multiplexing (OFDM) system to eliminate the correlation among the multi-path components, and the direction of arrival (DOA) estimation algorithm can estimate the correct DOAs. In the simulation, we apply the proposed smart antenna to the 802.11 system using OFDM. The simulation results demonstrate a superior performance under Bluetooth interference.

Inspec keywords: interference (signal); wireless LAN; carrier sense multiple access; direction-of-arrival estimation; OFDM modulation; adaptive antenna arrays; Bluetooth; collision avoidance

Other keywords: WLAN smart antenna; carrier sense multiple access; multicarrier transmission; ISM band; collision avoidance; orthogonal frequency-division multiplexing system; Bluetooth interference reduction; direction of arrival estimation algorithm

Subjects: Modulation and coding methods; Multiple access communication; Radio links and equipment; Signal processing and detection; Local area networks; Computer communications; Antenna arrays

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