Patent ID: 7218091

Claim:
An integrated spectrum analyzer for performing on-chip power spectrum measurements, said integrated spectrum analyzer comprising: a digital autocorrelator comprising: an analog input for inputting analog signal samples from a chip; an analog-to-digital converter for converting said analog signal samples into digital signal samples; a delay register for delaying a first converted digital signal sample; a digital multiplier for multiplying said first delayed digital signal sample with a second undelayed converted digital signal sample, to produce products of multiplication; an accumulator for accumulating a plurality of said products of multiplication over a period of time; and a digital integrator for integrating said accumulated products of multiplication, wherein said digital autocorrelator computes an autocorrelation function based on said analog signal samples, and wherein said digital autocorrelator is integrally formed on said chip for performing power spectrum measurements on said analog signal samples to compute said autocorrelation function.