Title :
Enhanced capacity using adaptive transmission and receive diversity
Author :
Catreux, S. ; Kirlin, R.L. ; Driessen, P.F.
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
Abstract :
The use of multiple element antennas-both transmitting and receiving-has great potential for increasing the capacity of wireless systems. The capacity is derived as a function of the eigenvalues of the channel matrix and computed for an “edge-excited cell” with 3 base sites and a subscriber terminal with a 3 element array, for line-of-sight channels. In an attempt to approach this capacity, we use a blind source separation technique at the receiver, and in the case when the smallest eigenvalue makes a negligible contribution to the capacity, we propose a way of using different transmitting schemes through link adaptation. These techniques allow multiple co-channel signals to coexist within the cell and thus capacity is increased. We present simulation results to compare their performance to the great capacity announced by information theory
Keywords :
adaptive antenna arrays; cellular radio; diversity reception; eigenvalues and eigenfunctions; receiving antennas; transmitting antennas; adaptive transmission; blind source separation technique; channel matrix; edge-excited cell; eigenvalues; enhanced capacity; information theory; line-of-sight channels; link adaptation; multiple co-channel signals; multiple element antennas; performance; receive diversity; receiving antennas; simulation; transmitting antennas; transmitting schemes; wireless systems; Antenna arrays; Base stations; Computer vision; Downlink; Eigenvalues and eigenfunctions; Matrix decomposition; Mobile antennas; Receiving antennas; Transmitters; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-5435-4
DOI :
10.1109/VETECF.1999.798643