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Towards optimum demodulation of bandwidth-limited and low SNR square-wave subcarrier signals (1995)

Feria, Y. ; Hurd, W.

In: CASI

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Publication Date: 2013-08-31

Description: The optimum phase detector is presented for tracking square-wave subcarriers that have been bandwidth limited to a finite number of harmonics. The phase detector is optimum in the sense that the loop signal-to-noise ratio (SNR) is maximized and, hence, the rms phase tracking error is minimized. The optimum phase detector is easy to implement and achieves substantial improvement. Also presented are the optimum weights to combine the signals demodulated from each of the harmonics. The optimum weighting provides SNR improvement of 0.1 to 0.15 dB when the subcarrier loop SNR is low (15 dB) and the number of harmonics is high (8 to 16).

Keywords: COMMUNICATIONS AND RADAR

Type: The Telecommunications and Data Acquisition Report; p 87-95

Format: application/pdf

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