Abstract: Provided is a rescue request signal processing device connected with a repeater and including a signal detector configured to detect identification information of a wireless communication terminal from an uplink signal outputted from the wireless communication terminal; a signal strength information generator configured to generate strength information of the uplink signal of the wireless communication terminal when the detected identification information of the wireless communication terminal is identical with identification information of a wireless communication terminal included in a request signal for location information transmitted from a location information requesting device; and a transmitter configured to transmit the strength information of the uplink signal and at least one of location information and identification information of the repeater to a location information server.

Abstract: A repeater using a digital filter is disclosed. The repeater comprises a MUX filter for filtering an RF signal received through an antenna or a signal to be transmitted through the antenna; a low noise amplifier for lowering noise of the signal filtered by the MUX filter; a down converter for converting the signal outputted from the low noise amplifier into an IF band signal to digitalize the signal; a digital filter for filtering the digital signal outputted form the down converter based on parameters inputted by a user; a filtering controller for controlling the digital filter by using a filtering coefficient calculated based on the parameters; an up converter for converting the signal filtered by the digital filter into an RF band signal; and a high power amplifier for amplifying the signal outputted from the up converter to a high power signal.

Abstract: A repeater using a digital filter is disclosed. The repeater comprises a MUX filter for filtering an RF signal received through an antenna or a signal to be transmitted through the antenna; a low noise amplifier for lowering noise of the signal filtered by the MUX filter; a down converter for converting the signal outputted from the low noise amplifier into an IF band signal to digitalize the signal; a digital filter for filtering the digital signal outputted form the down converter based on parameters inputted by a user; a filtering controller for controlling the digital filter by using al filtering coefficient calculated based on the parameters; an up converter for converting the signal filtered by the digital filter into an RF band signal; and a high power amplifier for amplifying the signal outputted from the up converter to a high power signal.

Abstract: Provided is a rescue request signal processing device connected with a repeater and including a signal detector configured to detect identification information of a wireless communication terminal from an uplink signal outputted from the wireless communication terminal; a signal strength information generator configured to generate strength information of the uplink signal of the wireless communication terminal when the detected identification information of the wireless communication terminal is identical with identification information of a wireless communication terminal included in a request signal for location information transmitted from a location information requesting device; and a transmitter configured to transmit the strength information of the uplink signal and at least one of location information and identification information of the repeater to a location information server.

Abstract: Disclosed is an antenna apparatus of a relay system. The relay system includes a link antenna apparatus transmitting and receiving electric signals to and from a base station, a coverage antenna apparatus transmitting and receiving electric signals to and from subscriber terminals, and a repeater system connected between the link antenna apparatus and the coverage antenna apparatus to bidirectionally amplify electric signals therebetween. The antenna apparatus is one of the link antenna apparatus and the coverage antenna apparatus and includes: at least one radiation element; and a power feeder controlling electric field intensity and phases of signals transmitted from or received by the radiation element, thereby offsetting beam patterns having an influence on antenna isolation of the antenna apparatus.