Non-parametric maximum likelihood estimation of pulsed interference on wireless links

In this paper we consider a wireless link subject to on-off interference. We show that by using different size packets and by measuring the packet error rate as a function of packet transmit duration on the air, the distribution of the off times between interference bursts can be accurately estimated. In the context of white space usage, this directly corresponds to estimation of the time duration of the spectrum hole usable by a secondary station. By being able to carry out sensing without requiring the transmitter to remain silent, this creates the potential for significant throughput gains.