Minimization of detection of symbol-rate spectral lines by delayand multiply receivers |
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Authors: | Reed D.E. Wickert M.A. |
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Affiliation: | Dept. of Electr. Eng., Colorado Univ., Colorado Springs, CO; |
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Abstract: | The detectability of the symbol rate of a digitally modulated signal by a delay and multiply receiver is investigated. Two signal pulse types are considered: Nyquist pulses and rectangular pulses. Since many digital transmission systems use rectangular pulse shapes, symbol rate-line detectability is considered for receivers optimized for rectangular pulses. For a receiver configuration that is reasonable for rectangular pulses, it is found that with a Nyquist pulse parameter α=0.25, the rate-line signal-to-noise ratio is down about 20 dB from that for a rectangular pulse signal |
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