Selecting system for radio base station

Abstract

Abstract PURPOSE:To transmit a fast change in the strength of a reception signal, by providing a transmitter of which oscillating frequency is changed in proportional to the strength of reception signal at a base station side, and a circuit of which output is changed proportional to the frequency at the selection and control side. CONSTITUTION:An FM receiver 1 of a base station, e.g., a station A receives the transmission signal of a mobile station, synthesizes and amplifies 4 a received demodulation signal via a transmitter 2 and an LPF3 and transmits the signal to a switching selection device. Further, the switching selection device receives signals from the base station at an HPF5 and an LPF10. The output of the HPF5 is transmitted to a converter 6, where AC signals are converted into 0- 1V of DC signals, and a converting signal of each base station outputted to a switch 7 is converted into a digital output at an A/D converter 8. The digital output is compared at a logical control circuit 9 and the output of larger output can be selected.

Inventors

• 👤 Tadashi Sugiura
• 👤 忠司 杉浦

Bibliographic Details