Interference between collocated wireless devices sharing the same RF channel is avoided or minimized by a new header format provided for the first data packet in an RF transmission. By inclusion of an invalid pulse in the header of each isolated data packet, an FM receiver that “captures” a desired...http://www.google.com.au/patents/US7170870?utm_source=gb-gplus-sharePatent US7170870 - Data packet transmission for channel-sharing collocated wireless devices
