A METHOD AND APPARATUS FOR TESTING A BASE STATION IN A TIME DIVISION MULTIPLE ACCESS RADIO COMMUNICATIONS SYSTEM
摘要
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.
申请公布号
WO9516331(A1)
申请公布日期
1995.06.15
申请号
WO1994SE01161
申请日期
1994.12.02
申请人
TELEFONAKTIEBOLAGET LM ERICSSON
发明人
RINNBAECK, HANS, LENNART;ERIKSSON, MATS, ERLAND;DJUPHAMMAR, HAAKAN, OLOV;EDLER, TOMAS, OLOV;NILSSON, SVEN, ERIK