Accession Number : ADA199000

Title :   Investigation of the Spectral Decomposition of Quadrature Error Signals.

Descriptive Note : Interim rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Faurer, C C

PDF Url : ADA199000

Report Date : 12 Aug 1988

Pagination or Media Count : 43

Abstract : This technical report presents the results of an investigation of the performance of band-partitioning filters when the complex signals being transformed contain quadrature errors. Phase and amplitude errors between the in-phase (I) and quadrature-phase (Q) components of a signal can cause significant degradation in the performance of a receiver system. Therefore, it is important to demonstrate how the output of band-partitioning filters, in this case formed by the discrete Fourier transform, are affected by signals with these types of perturbations. Computer simulations are used for this purpose. Because of the effect of quadrature errors on the system (not described in this report), band partitioning was performed separately on I and Q signal components. In addition to the DFT, Hadamard and Hartley transforms were employed and corresponding responses to swept frequency signals reveal interesting differences. Keywords: FFT, Band-partitioning, and Quadrature errors. (rh)

Descriptors :   *COMPUTERIZED SIMULATION, *DEGRADATION, *DISCRETE FOURIER TRANSFORMS, *ERRORS, AMPLITUDE, PERTURBATIONS

Subject Categories : Cybernetics
      Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE