Radio telecommunication system with a multi-sensor receiver stat

Details Radio telecommunication system with a multi-sensor receiver stat Radio telecommunication system with a multi-sensor receiver stat

1994-07-29

1996-08-20

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

With wave collector

455 63, 455137, 455273, 4552781, H04B 702

Patent

active

055488340

ABSTRACT:
Several emitter stations (MS1-MS4) are allowed to transmit call set-up packets in random access channels and user information packets in traffic channels to a receiver station (BST) which is provided with an array of N sensors (A.sub.l -A.sub.N) and with a receiver (RM) adapted to simultaneously acquire N-1 packets from the emitting stations and to derive therefrom N-1 distinct array output signals (X.sub.1 -X.sub.N-1). During a random access channel (RACH) channel, the identity of the emitting station (MS) as well as the direction of arrival (.theta.) and the power (.sigma.) of its signal are stored in a parameter data base (PDB) together with its weigh vector (W) calculated (WVG) therewith and a traffic channel (TCH) channel allocated (CHC) thereto. During either a RACH or a TCH channel, the weight vectors of a emitting station are provided by the data base and are applied to multipliers (M.sub.1 -M.sub.N-1) which produce the N-1 array output signals. In case of interference between emitting stations using a same TCH channel, another TCH channel is allocated to one of the interfering stations and the weight vectors are updated. The stations also send tracking packets in the RACH channel to update their parameters and accordingly the weight vectors in the data base. The present radio telecommunication system is particularly suitable, e.g., for the pan-European "Global System for Mobile communications" GSM wherein the emitter stations are mobile stations and for similar systems elsewhere.

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"Experimental Results from a Self-Calibrating Digital Beamforming Array", J. Herd, 1990 International Symposium Digest Antennas and Propagation, vol. I, May 1990, New York, pp. 384-387.
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Global System for Mobile Communications, GSM Recommendation 05.02, "Multiplexing and Multiple Access on the Radio Path", Jan. 1990, pp. 1-36.

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