Semesterarbeit

Synchronization for IEEE 802.11a based MIMO-OFDM Systems


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Existing wireless local area networks (WLAN) support data rates from 11 MBit/s (IEEE 802.11b) to 54 MBit/s (IEEE 802.11a/g). In order to offer rate-consuming wireless multimedia applications future WLAN systems will have to support much higher data rates and an improved link reliability. Recent research results have demonstrated that multiple-input multiple-output (MIMO) communication systems are able to substantially increase the data rate (bit/sec) and/or to improve the transmission quality (bit error rate) in a wireless point-to-point link without additional expenditure in power or bandwidth. These results have also highlighted the importance of synchronization between transmitter and receiver in the decoding process. The focus of the project ``Future MIMO-WLAN'' at the Communication Technology Laboratory (CTL) is to enhance the IEEE 802.11a technology using multiple antenna arrays. Hereby, the goal is to make a maximal reuse of the current IEEE 802.11a technology in order to provide compatibility with standard IEEE 802.11a products.

In this project you will study synchronization algorithms for MIMO-OFDM systems and investigate whether the preamble design of the current IEEE 802.11a standard can be efficiently used for MIMO-OFDM synchronization or not.

Subject area WLAN IEEE802.11a, MIMO communications, synchronization for MIMO OFDM
Type of work 30% Theory, 70% Implementation (Matlab/Simulink, VHDL)
Supervisor Dr. Boris Rankov
Professor Prof. Dr. Armin Wittneben