Throughput enhancement of OFDM based WLANs using space time block codes and time domain least squares channel estimation

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Abstract

HIPERLAN/2 802.11a, 802.11g and HiSWANa wireless local area networks (WLAN) employ coded orthogonal frequency division multiplexing (COFDM) and provide data rates of up to 54 Mbit/s in a 20 MHz bandwidth. In this paper, space-time block coding (STBC) techniques are considered as a means of enhancing the performance of COFDM WLAN. To perform channel estimation for multiple transmit and receive antennas, it is necessary to make transmitted pilot signals orthogonal in space and time. 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 2 Tx and 2 Rx antennas are presented and throughput enhancements are evaluated. It is observed that STBC doubles the link throughput for low SNR values. For the case of an 802.11a/g network, results for different packet lengths are also presented
Translated title of the contributionThroughput enhancement of OFDM based WLANs using space time block codes and time domain least squares channel estimation
Original languageEnglish
Title of host publication5th European Personal Mobile Communications Conference, Glasgow
PublisherInstitution of Engineering and Technology (IET)
Pages111 - 115
ISBN (Print)0852967535
DOIs
Publication statusPublished - Apr 2003
Event5th European Personal Mobile Communications Conference - Strathclyde, United Kingdom
Duration: 1 Apr 2003 → …

Conference

Conference5th European Personal Mobile Communications Conference
CountryUnited Kingdom
CityStrathclyde
Period1/04/03 → …

Bibliographical note

Conference Proceedings/Title of Journal: IEE 5th European Personal Mobile Communications Conference, 2003
Rose publication type: Conference contribution

Sponsorship: The authors wish to acknowledge the support of the IST SATURN and ROMANTM projects which are funded by the European Union

Other identifier: IEE Conf. Publ. No. 492

Keywords

  • OFDM modulation
  • channel estimation
  • wireless LAN

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