Abstract: An up converted PRN generator modulates a PRN sequence logically onto a carrier signal to produce a wideband signal having a flat spectrum in a frequency range well above zero. A carrier frequency at an integer multiple of a clock signal and the output of a PRN generator clocked by the clock signal are input to an exclusive OR gate to produce the up converted PRN sequence having a wide, flat bandwidth about the carrier frequency that is twice that of a baseband PRN sequence.

Abstract: A system for simultaneous ACLR measurements encompassing multiple wireless communications channels provides a dual channel processing. The input signal is down converted to produce a wideband signal that is input simultaneously to both a wideband channel having a high speed, low resolution ADC and a narrow band channel having a low speed, high resolution ADC. The resulting data streams from the ADCs are processed by a DSP to provide the simultaneous ACLR measurements.

Abstract: For alias detection in the frequency domain a method is provided of acquiring a signal under test (SUT) at each of a first sample rate and a second sample rate to provide thereby respective first and second streams of samples, processing the first and second streams of samples according to a first function to determine thereby respective spectral energy distributions, and comparing the spectral energy distributions to determine thereby a spectral region including spectral energy common to each of the spectral energy distributions.