High accuracy radar speedometer

The authors mention three techniques based upon spectral analysis for improving radar speedometer accuracy. These are FFT centre of gravity estimation, correlation technique, and super-resolution algorithms. Each of the techniques offers the potential for correcting for terrain bias error and, because of the increased amount of information available compared with a zero crossing approach, each lends itself well to built-in self-test (BIST) and safety critical systems. The most promising technique is the correlation algorithm which can easily be implemented using available DSP chips