| 摘要 |
FIELD: radio engineering, communication.SUBSTANCE: receiving radio centre further includes an antenna system consisting of n directional antennae which correspond to n multichannel radio receivers, n bidirectional fibre-optic communication lines, n signal processing units, a local area network (LAN), a radio reception channel control centre, wherein each multichannel radio receiver has an input device, a first multiplexer/demultiplexer, a first optoelectronic/electro-optical converter, a first optical transceiver, and each of the m analogue channels has a first tunable filter unit (1TFU), a second control and monitoring unit (2CMU), a controlled radio frequency amplifier, a second tunable filter unit (2TFU), a first controlled attenuator (1CA), a first controlled switch (1CS), a frequency converter, a controlled intermediate frequency amplifier, a second intermediate frequency filter unit (2IFFU), a second controlled switch (2CS), a second controlled attenuator (2CA) and an analogue-to-digital converter unit (ADC).EFFECT: high noise immunity of receiving messages due to high sensitivity, intermodulation dynamic range and reliability.5 cl, 2 dwg |
