Sender und Empfänger mit Schleifentestfunktionen in Mobilfunkübertragungssystemen mit Zeitmultiplexvielfach/Zeitmultiplexduplex (TDMA/TDD)

摘要

A radio apparatus according to a TDMA/TDD system uses its own transmitter (2) and receiver (3) so as to perform a loopback test for checking normality of the apparatus (1A) during a period of an unassigned slot. A loopback test signal is output from its own transmitter (2) during an unassigned transmitting slot and is received by its own receiver (3). The signal is temporarily stored in a memory (14) and is read during an unassigned receiving slot. The apparatus (1A) thus performs a loopback test. Since a loopback test can be performed by use of its own transmitter (2) and receiver (3) during an unassigned slot, a transmitting and receiving device (tester) specifically used for a loopback test is not required. Also, a loopback test can be carried out even while normal communications are being made.