<title>Detection and estimation of stochastic signal parameters by quadrature time-integrating acousto-optic correlator</title>

Abstract

A new time-integrating acousto-optic correlator (TIAOC) was developed. It combine relatively low complexness with exceedingly wide band of signals analyzed. The main feature of the architecture is the use of the light beams interference to provide the quadrature processing channel. Near-optimum stochastic signal detection algorithm using a new TIAOC is proposed. Power losses in comparison with the optimum algorithm are less than 1 dB. The possibility of the delay evaluation and the spectrum estimation is shown.

<title>Quadrature space-integrating acousto-optic correlator for phase-shift keyed signal processing</title>

“…(2) gives a number of limitations for the shape of reference signal narrow class of performing signals and limits the class of signals processed to binary phase-shift keyed signals. For increase the output signal level and implementation of quadrature channels the following conditions should be met: qoH ir/2 + 2irn, qodo =ir/8 + irk/2 (5) where n, k E N U 0, and h(x) = H also assumed.…”

“…Such disposition of photodetectors gives possibility to use just three of them instead of four as it was suggested in paper. 5 The output signals of this scheme are written as i)(2iO,t) = C1(qo){Re{R12}},…”

Dynamic range of quadrature radio-frequency time-integrating acousto-optic correlator

“…In this case the second quadrature processing channel is required to preserve all the information completely. We developed the use of crossing light beams and proposed the two-dimensional quadrature radio frequency TIAOC [4]- [6] that combines relative design simplicity with extremely wide frequency band. This paper presents the dynamic range analysis of the two-dimensional TIAOC in both active and passive operating modes.…”