US 2002/0120897 A1 · Test generator having a poisson distribution error signal

Abstract

A test set used for introducing a Poisson distribution of errors into a known digital data signal to produce a test signal uses an error signal generator that produces a Poisson distribution error signal. The error signal is then combined with the known digital data signal to produce a test signal with the Poisson distribution of errors. A pseudo-random binary sequence generator is used to produce a PRBS sequence and a comparator is used for comparing the PRBS sequence with a probability control signal. The comparator sets a single bit in the output stream of zeros when the PRBS sequence is less than the probability control signal. For multiple bit Poisson distribution error signals the PRBS generator and comparator combination may be replicated m times, or a single PRBS generator may be used and a unique independent subset of the PRBS sequence is applied to each of the multiple comparators. The comparators may be simplified by reducing the number of bits being compared for those probabilities where more than one bit of the Poisson distribution error signal may be set simultaneously, with a single comparator being used to set a single bit of the Poisson distribution error signal when the probability control signal is less than a minimum multiple bit error probability value.

Claims22

Dependent claims

A test set for generating from a known digital data signal a test signal having a Poisson distribution of errors comprising:

means for generating the known digital data signal;
means for generating a Poisson distribution error signal as a function of a probability control signal;
and
means for combining the known digital data signal with the Poisson distribution error signal to produce the test signal.

1 more element

A method of generating from a known digital data signal a test signal having a Poisson distribution of errors comprising the steps of:

generating the known digital data signal;
generating a Poisson distribution error signal as a function of a probability control signal;
and
combining the known digital data signal with the Poisson distribution error signal to produce the test signal.

1 more element

A Poisson distribution error signal generator comprising:

means for generating a pseudo-random binary sequence;
and
means for comparing the pseudo-random binary sequence with a probability control signal to set an output bit of the Poisson distribution error signal when the pseudo-random binary sequence is less than the probability control signal.

A method of generating a Poisson distribution error signal comprising the steps of:

generating a pseudo-random binary sequence;
and
comparing the pseudo-random binary sequence with a probability control signal to set an output bit of the Poisson distribution error signal when the pseudo-random binary sequence is less than the probability control signal.

Dependencies are inferred from the claim text.

Test generator having a poisson distribution error signal

Life of this patent

Test generator having a poisson distribution error signal

Life of this patent

Abstract

Claims22