| CPC G08G 5/0078 (2013.01) [G08G 5/0008 (2013.01); H04B 7/0408 (2013.01)] | 20 Claims |
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1. A system configured to mount on a first vehicle, the system comprising:
an antenna configured to:
transmit a first surveillance message by at least forming an omni-directional beam;
receive a second surveillance message from a second vehicle during a first time period; and
receive a third surveillance message from a third vehicle during a second time period, wherein the first and second time periods at least partially overlap in time; and
processing circuitry configured to:
demodulate the second surveillance message by at least forming a first directional beam;
demodulate the third surveillance message by at least forming a second directional beam, wherein the second directional beam is different than the first directional beam, and wherein the first directional beam is formed simultaneously with the second directional beam;
transmit a fourth surveillance message following a first pause after transmitting the first surveillance message; and
transmit a fifth surveillance message following a second pause after transmitting the fourth surveillance message, wherein a duration of the first pause is at least ten percent greater than a duration of the second pause or the duration of the first pause is at least ten percent less than the duration of the second pause.
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