smart antennas on mobile phone
hi dalila:
I think this paper can be useful to you:
"An Overview of Smart Antenna Technology for Mobile Communications Systems"
Lehne et al
IEEE Communications Surveys
h**p://www.comsoc.org/livepubs/surveys/public/4q99issue/lehne.html
...like it establishes, one can define "levels of intelligence":
-Switched lobe (SL): This is also called switched beam. It is the simplest technique, and comprises only a basic switching function between separate directive antennas or predefined beams of an array. The setting that gives the best performance, usually in terms of received power, is chosen. Because of the higher directivity compared to a conventional antenna, some gain is achieved. Such an antenna will be easier to implement in existing cell structures than the more sophisticated adaptive arrays, but it gives a limited improvement.
-Dynamically phased array (PA): By including a direction of arrival (DoA) algorithm for the signal received from the user, continuous tracking can be achieved and it can be viewed as a generalization of the switched lobe concept. In this case also, the received power is maximized.
-Adaptive array (AA): In this case, a DoA algorithm for determining the direction toward interference sources (e.g., other users) is added. The radiation pattern can then be adjusted to null out the interferers. In addition, by using special algorithms and space diversity techniques, the radiation pattern can be adapted to receive multipath signals which can be combined. These techniques will maximize the signal to interference ratio (SIR) (or signal to interference and noise ratio (SINR)).
Conventional mobile systems usually employ some sort of antenna diversity (e.g., space or polarization diversity).
...so, the question is: what level of intelligence are you targeting?
If you just want use polarization diversity (antenna diversity) I think that the first paper must be that you are looking for
yet waiting for experts opinion
best regards