Title :
Rate-feedback schemes for MIMO-OFDM wireless LANs
Author :
Mahadevappa, Ravi ; Ten Brink, Stephan
Author_Institution :
Realtek Semicond., Irvine, CA, USA
Abstract :
Through the widespread use of laptop computers and other mobile equipment, wireless LANs have significantly grown in popularity over the past few years. To meet the increasing data rate requirements of future wireless LANs, different physical layer improvements are currently being discussed within the IEEE 802.11n standardization group. This paper considers feedback schemes to increase the data rate and range of a multiple antenna (MIMO) OFDM WLAN system. As is shown, a simple feedback scheme based on switching on/off subcarriers/subchannels can achieve gains up to 3 dB while requiring minimal overhead for feeding back information to the transmitter.
Keywords :
IEEE standards; MIMO systems; OFDM modulation; antenna arrays; feedback; radio transmitters; telecommunication standards; wireless LAN; IEEE 802.11n standardization group; MIMO OFDM WLAN system; MIMO-OFDM wireless LAN; data rate requirements; feedback schemes; laptop computers; mobile equipment; multiple antenna OFDM WLAN system; physical layer improvements; rate-feedback schemes; subcarrier switching; subchannel switching; system range; transmitter feedback overhead; Antenna feeds; Feedback; MIMO; Mobile computing; OFDM; Physical layer; Portable computers; Standardization; Transmitters; Wireless LAN;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th
Print_ISBN :
0-7803-8521-7
DOI :
10.1109/VETECF.2004.1400070
