OFDM for Wireless Multimedia Communications
OFDM for Wireless Multimedia Communications
Multi-Antenna Transceiver Techniques for 3g and Beyond
Multi-Antenna Transceiver Techniques for 3g and Beyond
Space-Time Coding
Multicarrier Techniques for 4G Mobile Communications
Multicarrier Techniques for 4G Mobile Communications
Advanced Wireless Communications: 4G Technologies
Advanced Wireless Communications: 4G Technologies
Channel models for ultrawideband personal area networks
IEEE Wireless Communications
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
On the available diversity gain from different dual-polarized antennas
IEEE Journal on Selected Areas in Communications
The ultra-wide bandwidth indoor channel: from statistical model to simulations
IEEE Journal on Selected Areas in Communications
Probabilistic coexistence and throughput of cognitive dual-polarized networks
EURASIP Journal on Wireless Communications and Networking - Special issue on dynamic spectrum access: from the concept to the implementation
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Ultra-wideband (UWB) transmission provides a fast local range wireless connection using the same frequency spectrum assigned to other narrowband communication standards. A precise knowledge of the indoor transmission channel is necessary to obtain high performance. Several channel models have been presented in the literature, but normally without considering the distortion effect caused by a real UWB antenna. A detailed antenna model shows that the radiation pattern varies with frequency, i.e., different receiver positions and antenna orientations result in different antenna frequency responses. In order to obtain a more uniform coverage over the indoor area, two transmitting antennas with orthogonal polarization can be used. The receiver can use a single antenna whose orientation and position is arbitrary within the coverage area, resulting in a special case of a 2:1 MISO system in which a space-time encoding is used at the transmitter. The target is to employ the polarization diversity to obtain a constant quality of symbol detection while the receiver moves around in the coverage area. The proposed polarization diversity scheme is applied in an UWB multiband scenario and it is compared to both a single antenna scheme and a classical space diversity scheme employing a single polarized antenna array.