Patent ID: 9083573
Filing Date: 2015-07-14
Classification: H04L

Abstract:
1. A transmitter comprising: a detection stage configured to detect a first signal having a first component that includes a frequency; said detection stage configured to operate in a channel space between a primary mode and a secondary mode, with the primary mode corresponding to the detected first signal not being transmitted from a higher priority transmitter, and with the secondary mode corresponding to the detected signal first signal being transmitted from the higher priority transmitter; a pilot-and-data-generating stage comprising a mode switch for selecting between the primary and secondary modes based on said detection stage, and configured to generate a data component that includes approximately the frequency in response to the detection of the first signal; and a transmission stage configured to transmit a second signal having the data component while the detection stage is detecting the first signal; said transmission stage configured to transmit the second signal as a primary signal in the channel space when said detection stage is in the primary mode, and configured to transmit the second signal in the channel space as a secondary signal when said detection stage is in the secondary mode.