Exact analytical model for the AEP of control signals

An exact analytical model for the aliasing error probability (AEP) in the signature analysis of control signals using a modified signature analyser is presented. The signature analyser used comprises a general-structure two-input compacting module (TICM), which simplifies the motherboard VLSI design by providing a flexible geometry, which could be easily integrated with neighbouring structures. The use of the modified data probe eliminates the ambiguity introduced by the high-impedance state and at the same time retains the same signature of the binary stream. The model specifies algebraically the effects of the TICM architecture, the test pattern length, and the control stream error probabilities. It is proved that the (hardware) criterion used for calculating the AEP for the internal- and external exclusive-OR two-input shift registers is not valid for the general case and a new criterion is provided. The results obtained are augmented by two special cases, a case study, and associated simulation