A METHOD AND APPARATUS FOR TESTING A BASE STATION IN A TIME DIVISION MULTIPLE ACCESS RADIO COMMUNICATIONS SYSTEM

A METHOD AND APPARATUS FOR TESTING A BASE STATION IN A TIME DIVISION MULTIPLE ACCESS RADIO COMMUNICATIONS SYSTEM

IN A BASE STATION OF A MOBILE CELLULAR TELEPHONE SYSTEM OF THE TYPE HAVING TIME DIVISION MULTIPLE ACCESS (TDMA) CHANNELS, A RADIO FREQUENCY TEST LOOP IS ESTABLISHED BETWEEN A PREDETERMINED DOWNLINK CHANNEL OF A BASE STATION TRANSMITTER AND A PREDETERMINED UPLINK CHANNEL OF A BASE STATION RECEIVER. T...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: NILSSON, SVEN ERIK, RINNBACK, HANS LENNART, ERIKSSON, MATS ERLAND, DJUPHAMMAR, HAKAN OLOV, EDLER, OLOV TOMAS
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MULTIPLEX COMMUNICATION
TRANSMISSION
WIRELESS COMMUNICATIONS NETWORKS
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:IN A BASE STATION OF A MOBILE CELLULAR TELEPHONE SYSTEM OF THE TYPE HAVING TIME DIVISION MULTIPLE ACCESS (TDMA) CHANNELS, A RADIO FREQUENCY TEST LOOP IS ESTABLISHED BETWEEN A PREDETERMINED DOWNLINK CHANNEL OF A BASE STATION TRANSMITTER AND A PREDETERMINED UPLINK CHANNEL OF A BASE STATION RECEIVER. THE TEST LOOP IS IN REAL TIME, THEREBY ELIMINATING THE TIME OFFSET OF THE RADIO CHANNELS USED FOR COMMUNICATIONS. THE RADIO FREQUENCY TEST LOOP INCLUDES A CIRCUIT FOR TRANSPOSING THE FREQUENCY OF THE CARRIER SIGNAL FROM THE TRANSMITTER TO A FREQUENCY THAT CAN BE RECEIVED BY THE RECEIVER. THE SIGNAL HAVING THE TRANSPOSED FREQUENCY IS USED IN TESTS FOR DETERMINING VALUES SUCH AS BIT ERROR RATE (BER), TRANSMISSION SIGNAL LEVEL, OR RECEPTION SENSITIVITY.