Recursive random sampling strategy for a digital wattmeter

A recursive random sampling strategy is proposed for the implementation of a digital broadband wattmeter. In this strategy each sampling instant is obtained by adding a prefixed constant lag plus a random increment to the preceding one. The formula for the evaluation, in terms of accuracy and bandwidth of errors arising from the sampling strategy and the filtering algorithms, is given and discussed; it shows that this sampling strategy does not limit the bandwidth. The theoretical results are compared with those obtained by simulating the proposed instrument