A comparative evaluation of some practical algorithms used in the equivalent bits test of waveform recorders

A comparative evaluation of three basic algorithms that are used in the equivalent-bit test in digital recorders is presented. The algorithms are used to calculate the parameters of a pure sinusoid which has been digitally recorded. The basic algorithms and their variations are evaluated with regards to relative and absolute accuracy as well as efficiency. Various methods of obtaining the initial estimates of the sine wave parameters are examined. The advantages, disadvantages and effects of the techniques used to arrive at these estimates are discussed and optimum methods are suggested. The work is intended to lead to the specification of a general best-fit algorithm to be used in sine-wave evaluation of digital recorders.<>