Disclosed is a system and method for determining output transmission power for radio signal transmission, from an interception transmitter and from an announcement transmitter, respectively, to at least one announcement receiver, wherein each announcement receiver is in a respective motor vehicle, the method comprising: receiving an input signal to be suppressed; determining a first field strength of the input signal, at a first frequency f.sub.I, at a position POS.sub.R; determining a first transmission power of a first radio signal, intended to be transmitted by the interception transmitter, needed to suppress the input signal at an interception transmission distance; determining a second field strength of at least one of atmospheric noise and the input signal at a second frequency f.sub.A, at the position POSR; and determining a second transmission power of second radio signal comprising an announcement to be transmitted by the announcement transmitter to the at least one announcement receiver.

Disclosed is a system and method for determining output transmission power for radio signal transmission, from an interception transmitter and from an announcement transmitter, respectively, to at least one announcement receiver, wherein each announcement receiver is in a respective motor vehicle, the method comprising: receiving an input signal to be suppressed; determining a first field strength of the input signal, at a first frequency f.sub.I, at a position POS.sub.R; determining a first transmission power of a first radio signal, intended to be transmitted by the interception transmitter, needed to suppress the input signal at an interception transmission distance; determining a second field strength of at least one of atmospheric noise and the input signal at a second frequency f.sub.A, at the position POSR; and determining a second transmission power of second radio signal comprising an announcement to be transmitted by the announcement transmitter to the at least one announcement receiver.

In some examples, a system includes a receiver configured to receive communication from a traffic management system and a transmitter configured to transmit surveillance messages. The system also includes processing circuitry configured to determine, in a first instance, that the receiver has not received a command signal from the traffic management system. The processing circuitry is also configured to suppress transmission of surveillance messages by the transmitter in response to determining that the receiver has not received the command signal. The processing circuitry is further configured to determine, in a second instance, that the receiver received the command signal from the traffic management system. The processing circuitry is configured to cause the transmitter to transmit the surveillance messages in response to determining that the receiver received the command signal.

In some examples, a system includes a receiver configured to receive communication from a traffic management system and a transmitter configured to transmit surveillance messages. The system also includes processing circuitry configured to determine, in a first instance, that the receiver has not received a command signal from the traffic management system. The processing circuitry is also configured to suppress transmission of surveillance messages by the transmitter in response to determining that the receiver has not received the command signal. The processing circuitry is further configured to determine, in a second instance, that the receiver received the command signal from the traffic management system. The processing circuitry is configured to cause the transmitter to transmit the surveillance messages in response to determining that the receiver received the command signal.

A system for displaying the effect of a change in Automatic Terminal Information Service (ATIS) broadcast. The system comprises a receiver module configured to receive at least two ATIS broadcasts and a parsing module operably connected to the receiver module and configured to parse the received at least two ATIS broadcasts into at least two corresponding sets of ATIS messages. The system includes a comparison module operably connected to the parsing module and configured to compare the at least two sets of ATIS messages to determine if a disparity exists between the at least two sets of ATIS messages. The system includes a display module; and a processor module operably connected to the comparison module and the display module, the processor module being configured to cause the display module to display an alert when it is determined that a disparity exists between the at least two sets of ATIS messages.

A system for displaying the effect of a change in Automatic Terminal Information Service (ATIS) broadcast. The system comprises a receiver module configured to receive at least two ATIS broadcasts and a parsing module operably connected to the receiver module and configured to parse the received at least two ATIS broadcasts into at least two corresponding sets of ATIS messages. The system includes a comparison module operably connected to the parsing module and configured to compare the at least two sets of ATIS messages to determine if a disparity exists between the at least two sets of ATIS messages. The system includes a display module; and a processor module operably connected to the comparison module and the display module, the processor module being configured to cause the display module to display an alert when it is determined that a disparity exists between the at least two sets of ATIS messages.

A system and method provide an enhanced listening experience for a user of a radio receiver or other device that receives broadcast or streamed content having a plurality of program channels. The method and system buffer designated channels at the receiver and, when switching among channels, play back the buffered designated channels during reception from a selected point therein depending on the channel or other criteria. When switching to a different channel during reception, a user is able to hear content in a buffered program channel with music from the start of a song, for example, whereas content in a channel with news, talk radio, or live sports is played back from live reception, even though the content segments are transmitted at different start times relative to their selected times for playback following a channel change. User controls allow navigation among buffered designated channels during reception.

A system and method provide an enhanced listening experience for a user of a radio receiver or other device that receives broadcast or streamed content having a plurality of program channels. The method and system buffer designated channels at the receiver and, when switching among channels, play back the buffered designated channels during reception from a selected point therein depending on the channel or other criteria. When switching to a different channel during reception, a user is able to hear content in a buffered program channel with music from the start of a song, for example, whereas content in a channel with news, talk radio, or live sports is played back from live reception, even though the content segments are transmitted at different start times relative to their selected times for playback following a channel change. User controls allow navigation among buffered designated channels during reception.

In some examples, a system includes a receiver configured to receive communication from a traffic management system and a transmitter configured to transmit surveillance messages. The system also includes processing circuitry configured to determine, in a first instance, that the receiver has not received a command signal from the traffic management system. The processing circuitry is also configured to suppress transmission of surveillance messages by the transmitter in response to determining that the receiver has not received the command signal. The processing circuitry is further configured to determine, in a second instance, that the receiver received the command signal from the traffic management system. The processing circuitry is configured to cause the transmitter to transmit the surveillance messages in response to determining that the receiver received the command signal.

In some examples, a system includes a receiver configured to receive communication from a traffic management system and a transmitter configured to transmit surveillance messages. The system also includes processing circuitry configured to determine, in a first instance, that the receiver has not received a command signal from the traffic management system. The processing circuitry is also configured to suppress transmission of surveillance messages by the transmitter in response to determining that the receiver has not received the command signal. The processing circuitry is further configured to determine, in a second instance, that the receiver received the command signal from the traffic management system. The processing circuitry is configured to cause the transmitter to transmit the surveillance messages in response to determining that the receiver received the command signal.