Title :
An extrapolated matched-filter approach to multi-user channel estimation for OFDM in SDMA
Author :
Tahat, Ashraf A. ; Ucci, Donald R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Inst. of Technol., Chicago, IL, USA
Abstract :
Space division multiple access (SDMA) may provide a solution to increase the bandwidth efficiency and the transmission capacity of a cellular system or in a wireless network by exploiting the spatial dimension aiding transmission of very high data rates over wireless links. The implementation of such SDMA receivers, however, requires accurate channel estimation in severe frequency-selective and time-variant broadband radio channels. In this paper, we consider the link from the mobile user to the base station. The subsystems include an orthogonal frequency division multiplex (OFDM) transmitter, an adaptive antenna array (AAA), the vector channel model, the data model, and the weight construction and combining.
Keywords :
OFDM modulation; adaptive antenna arrays; antenna radiation patterns; broadband networks; cellular radio; channel estimation; matched filters; radio transmitters; space division multiple access; AAA; OFDM; SDMA receivers; adaptive antenna array; bandwidth efficiency; cellular system; data model; extrapolated matched-filter approach; frequency-selective radio channels; multi-user channel estimation; orthogonal frequency division multiplex transmitter; space division multiple access; spatial dimension; time-variant broadband mobile user; transmission capacity; vector channel model; weight construction; wireless links; wireless network; Adaptive arrays; Bandwidth; Base stations; Cellular networks; Channel estimation; Frequency estimation; Multiaccess communication; OFDM; Receivers; Wireless networks;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2002. IEEE
Print_ISBN :
0-7803-7330-8
DOI :
10.1109/APS.2002.1016727
