MIMO performance of a planar logarithmically periodic antenna with respect to measured channel matrices

[摘要] The increasing interest in wireless transmission of highest data rates formultimedia applications (e.g. HDTV) demands the use of communication systemsas e.g. described in the IEEE 802.11n draft specification for WLAN includingspatial multiplexing or transmit diversity to achieve a constant high datarate and a small outage probability. In a wireless communications system thetransmission of parallel data stream leads to multiple input/multipleoutput (MIMO) systems, whose key parameters heavily depend on the propertiesof the mobile channel. Assuming an uncorrelated channel matrix thecorrelation between the multiplexed data streams is caused by the coupling ofthe antennas, so that the radiation element becomes an even more importantpart of the system. Previous work in this research area (Klemp and Eul, 2006)has shown that planar log.-per four arm antennas are promising candidates forMIMO applications providing two nearly decorrelated radiators, which cover awide frequency range including both WLAN bands at 2.4 GHz and 5.4 GHz. Up tonow the MIMO performance of this antenna is mainly analyzed by simulations.In this contribution measured channel matrices in a real office environmentare studied in terms of the antenna's MIMO performance such as outageprobability. The obtained results recorded by using a commercial platform arecompared to the simulated ones.

[学科分类] 电子、光学、磁材料