REFINED BOUNDS ON SIGNATURE ANALYSIS ALIASING FOR RANDOM TESTING

in previous work a simple bound, ~+2 , on the aliasing probability in serial signature analysis for a random test pattern of length L was derived. This simple bound is sharpened here by almost a factor of two. For serial signature analysis, it is shown that the I+& 1 aliasing probability is bounded above by - = L (E L small for large L) for test lengths L less than the period, Lc, of the signature polynomial. The simple bounds derived are compared with exact as well as experimentally measured aliasing probability values. It is conjectured that L-l is the best monotonic bound on the aliasing probability for serial signature analysis.