Abstract
This paper assesses the performance of different interoplation strategies for an OFDM/MMSE smart antenna serving multiple users through Space Division Multiple Access (SDMA) in a Wireless LAN following the IEEE 802.11a/e or HIPERLAN/2 standards. The frequency dependence of the channel transfer matrix and the weights is studied in indoor environments of different dimensions and for different coherence bandwidths using a ray-tracing tool. Interpolation is proposed to reduce the complexity of calculating the smart antenna weights at every OFDM subcarrier. The performance of different interpolation strategies is investigated in terms of complexity and Signal to Interference plus Noise Ratio (SINK) degradation relative to the case where the weights are calculated at every subcarrier. Simulation results agree with the expected behaviour showing that FIT based interpolation generally outperforms linear interpolation when the span between calculated subcarriers is less than 16. Channel transfer matrix based interpolation outperforms weight matrix based interpolation at the cost of increased complexity. © 2005 IEEE.
Original language | English |
---|---|
Title of host publication | IEEE Vehicular Technology Conference|IEEE Veh Technol Conf |
Pages | 177-181 |
Number of pages | 4 |
Volume | 61 |
Publication status | Published - 2005 |
Event | 2005 IEEE 61st Vehicular Technology Conference -VTC 2005 - Spring Stockholm: Paving the Path for a Wireless Future - Stockholm Duration: 1 Jul 2005 → … |
Conference
Conference | 2005 IEEE 61st Vehicular Technology Conference -VTC 2005 - Spring Stockholm: Paving the Path for a Wireless Future |
---|---|
City | Stockholm |
Period | 1/07/05 → … |
Keywords
- Infrastructure WLAN
- MMSE Beamfarming
- OFDM
- SDMA
- Smart Antennas
- Spatial Indoor Channel Model