Abstract
HIPERLAN/2, 802.11a, 802.11g and HiSWANa wireless local area networks (WLANs) employ coded orthogonal frequency division multiplexing (COFDM) and provide data rates of up to 54 Mbps in a 20 MHz bandwidth. In this paper, space-time block coding (STBC) and spatial multiplexing MIMO techniques are considered as a means of enhancing the performance of COFDM WLANs. To perform channel estimation for multiple transmit and receive antennas, it is necessary to make transmitted pilot signals orthogonal in space and time. In this paper, this was achieved using a Hadamard design. A time domain least square channel estimator was used to achieve high performance. Packet error rate (PER) performance results for the case of 2Tx and 2Rx antennas are presented and throughput enhancements are evaluated. It is observed that STBC doubles the link throughput for low SNR values. As expected, multiplexing achieves significant throughput enhancements at high SNR values at the expense of additional complexity
| Translated title of the contribution | Use of space time block codes and spatial multiplexing using TDLS channel estimation to enhance the throughput of OFDM based WLANs |
|---|---|
| Original language | English |
| Pages (from-to) | 704 - 708 |
| Number of pages | 5 |
| Journal | IEEE 57th Vehicular Technology Conference, 2003 (VTC 2003-Spring) |
| Volume | 1 |
| Publication status | Published - Apr 2003 |
| Event | 57th Vehicular Technology Conference 2003 (VTC 2003-Spring) - Jeju, Korea, Republic of Duration: 1 Apr 2003 → … |
Bibliographical note
Publisher: Institute of Electrical and Electronics Engineers Inc. (IEEE)Name and Venue of Conference: IEEE 57th Vehicular Technology Conference (VTC-Spring 2003)
Conference Organiser: IEEE
Rose publication type: Conference contribution
Sponsorship: The authors wish to acknowledge the financial support of the IST ROMANTIK project (funded by the European Union) and A. Prado would also like to thank Toshiba Research Europe Limited (TREL)
Terms of use: Copyright © 2003 IEEE. Reprinted from Proceedings of IEEE 57th Vehicular Technology Conference, 2003. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected].
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Contributor (Other): Institute of Electrical and Electronics Engineers (IEEE)
Keywords
- OFDM
- WLANs
- channel estimation
- MIMO