Enhancing a push-to-talk communication system

Abstract

A peer-to-peer communication system () capable of operating in push-to-talk mode comprises terminals (A,) capable of push-to-talk, peer-to-peer radio communication, and an enhancing device () arranged for coupling with the terminal. The enhancing device () comprises: • an antenna () for transmitting and receiving radio signals, • a band-pass filter () for selecting a frequency band of the radio signals, • a bidirectional amplifier () for amplifying radio signals alternatingly in a transmitting and in a receiving direction, • a control unit () for controlling the bidirectional amplifier () in response to a sensor signal, and • a sensor () for detecting whether the terminal (A;) is transmitting or receiving and for producing the sensor signal in response thereto, which sensor is galvanically isolated from the terminal. The communication system () may be a Terrestrial Trunked Radio system, commonly known as TETRA system, more in particular a TETRA system operating in Direct Mode. The antenna () may be a can antenna or a loop-fed antenna. Lighting device with a wind-powered cleaning member.