Title :
Adaptive transmitting antenna arrays with feedback
Author :
Gerlach, Derek ; Paulraj, Arogyaswami
Author_Institution :
Inf. Syst. Lab., Stanford Univ., CA, USA
Abstract :
We address the problem of transmitting multiple cochannel signals from an antenna array to several receivers so that each receiver gets its intended signal with minimum crosstalk from the remaining signals. In addition to the usual "information" mode, we propose a "probing" mode during which probing signals received at the mobiles are fed back to the transmitter. These probing signals are used to identify an unknown propagation environment, enabling the transmitter to form the necessary transmission beampatterns.<>
Keywords :
antenna phased arrays; array signal processing; broadcast antennas; feedback; mobile radio systems; radiowave propagation; adaptive transmitting antenna arrays; crosstalk; feedback; information mode; mobiles; multiple cochannel signals; probing signals; propagation environment; receivers; transmission beampatterns; transmitter; Adaptive arrays; Antenna arrays; Antenna feeds; Antennas and propagation; Array signal processing; Crosstalk; Feedback; Receiving antennas; Transmitters; Transmitting antennas;
Journal_Title :
Signal Processing Letters, IEEE