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The effect of multipath on the detection of symbol-rate spectral lines by delay and multiply receivers

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2 Author(s)
Wickert, M.A. ; Dept. of Electr. & Comput. Eng., Colorado Univ., Colorado Springs, CO, USA ; Staton, W.C.

The effect of a secondary path signal on the detectability of the symbol rate spectral line of a binary phase-shift keyed (BPSK) signal by a delay and multiply receiver is investigated. The measure of detectability used is the rate line signal-to-noise ratio. The parameters that define the secondary path signal are initially modeled as deterministic quantities; the phase of the secondary path signal is then taken to be a random variable independent and uniform on (0, 2π). It is found that, with deterministic path parameters, the presence of a secondary path can seriously affect the detectability of BPSK rate lines. When the phase is taken to be uniform on (0, 2π) over the receiver observation time, then the delay and multiply receiver performs as if no multipath is present. In this case, a noncoherent power addition of the primary and secondary path signals occurs

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Selected Areas in Communications, IEEE Journal on  (Volume:10 ,  Issue: 3 )