Publica
Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Delaylimited capacity and maximum throughput of spatially correlated multiple antenna systems under average and peakpower constraints
 IEEE Information Theory Society: IEEE Information Theory Workshop 2004. Proceedings : October 24  29, 2004, San Antonio Marriott Riverwalk Hotel, San Antonio, Texas, USA Piscataway, NY: IEEE, 2004 ISBN: 0780387201 pp.440445 
 Information Theory Workshop (ITW) <2004, San Antonio/Tex.> 

 English 
 Conference Paper 
 Fraunhofer HHI () 
Abstract
The delaylimited capacity is defined as the transmission rate that can be guaranteed in all fading states under finite longterm power constraints. For the singleinput singleoutput Rayleigh fading channel it is zero. In contrast it is greater than zero in multiple antenna channels but depends on the properties of the fading channel, e.g. on the spatial correlation. In this work, we prove that the delaylimited capacity is Schurconcave with respect to the spatial correlation. In addition to the average power constraint, we apply a peakpower constraint which limits the kurtosis of the input signal. We derive the delaylimited capacity for this general class of multiple antenna channels with correlation under peakpower and longterm power constraint. Without the stringent delay constraint, the maximum throughput is defined as the transmission rate times successful transmission probability. When the transmitter is uninformed, the maximum throughput is achieved for small SNR by using only one transmit antenna and for high SNR by using all available transmit antennas. When the transmitter has perfect channel knowledge, the optimal power allocation under longterm power constraint is analyzed and the impact of correlation is discussed by numerical simulations.