| 主权项 |
1. A network station comprising:
a sampling device configured to generate samples of radio frequency activity on a medium; a first correlator configured to, based on a first delay, autocorrelate the samples to generate a first autocorrelation value, wherein the first delay matches a periodicity of a jam signal, wherein the jam signal indicates a second station is to transmit data, and wherein the second station is separate from the network station; a second correlator configured to, based on a second delay, autocorrelate the samples to generate a second autocorrelation value, wherein the second autocorrelation value indicates whether the radio frequency activity includes periodic noise, and wherein the second delay is different than the first delay, and the second delay matches a periodicity of the periodic noise; a control circuit configured to, based on each of the first autocorrelation value and the second autocorrelation value, prevent the network station from transmitting a radio frequency signal on the medium; and a third correlator configured to autocorrelate the samples using a third delay to generate a third autocorrelation value, wherein
the third delay is different from each of the first delay and the second delay,the control circuit is configured to prevent the network station from transmitting the radio frequency signal on the medium (i) in response to the first autocorrelation value indicating the radio frequency activity includes the jam signal, and (ii) when both the second autocorrelation value and the third autocorrelation value indicate the radio frequency activity does not include the periodic noise, andthe control circuit is configured to permit the network station to transmit the radio frequency signal on the medium (i) prior to a transmission period of the jam signal lapsing, (ii) when the first autocorrelation value exceeds a first threshold, and (ii) when the third autocorrelation value exceeds a second threshold. |
