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Abstract

A mobile radio communication device for performing communication with a base station comprises an interference detection measure for detecting occurrence of interference to the downlink frequency and/or the uplink frequency, and an interference informing measure for transmitting information about the occurrence of the interference to the base station. The base station which received the information about the interference assigns the mobile radio communication device new time slots or a new communication carrier frequency. The mobile radio communication device has a transmission system and two reception systems which are composing a post-detection selective space diversity system, and each of the two reception systems is composed of a double superheterodyne system, in the same way as general conventional mobile radio communication devices. Interference to the downlink frequency is detected utilizing the data error rate in the demodulated reception signal in one reception system, and interference to the uplink frequency is detected utilizing the field intensity of a radio wave having the uplink frequency received by an antenna of the other reception system. The detection and informing of interference is realized by addition of a simple circuit composed of a circulator, a high frequency amplifier, a mixer and a switch to a general conventional mobile radio communication device.

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First Claim