Title :
The smart wireless LAN system: physical layer design and results
Author :
Okamoto, Garret ; Xu, Guanghan
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA
Abstract :
The smart wireless LAN (SWL) system integrates SDMA with the IEEE 802.11 wireless LAN standard to enable multiple users to transmit on a wireless LAN at the same time. The physical layer design of the SWL system allows for remote terminals to transmit and receive as specified in the 802.11 standard. The SWL base station uses an antenna array and SDMA techniques to simultaneously transmit and receive data from up to four terminals at once. Downlink is performed via a delay and combination at the base station while utilizing standard beamforming techniques. Uplink signals are separated and decoded at the base station using a simple pseudoinverse technique utilizing the spatial signature knowledge found previously. Experimental results demonstrate the feasibility of using SDMA in our wireless LAN scenario. Computer simulation results show the feasibility and potential of this method
Keywords :
IEEE standards; access protocols; antenna arrays; data communication; delays; inverse problems; land mobile radio; multi-access systems; spread spectrum communication; telecommunication standards; wireless LAN; IEEE 802.11 wireless LAN standard; SDMA; SS-SDMA protocol; SWL base station; SWL system; antenna array; beamforming; combination; decoded; delay; downlink; physical layer design; pseudoinverse technique; remote terminals; smart wireless LAN protocol; spatial signature knowledge; spread spectrum space division multiple access protocol; uplink signals; Antenna arrays; Array signal processing; Base stations; Delay; Downlink; Multiaccess communication; Physical layer; Receiving antennas; Transmitting antennas; Wireless LAN;
Conference_Titel :
Vehicular Technology Conference, 1997, IEEE 47th
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-3659-3
DOI :
10.1109/VETEC.1997.605393
