Performance of a fourth-power envelope detector for symbol-rate tone generation

Author

Reed, D.E. ; Wickert, M.A.

Author_Institution

Dept. of Electr. Eng., Colorado Univ., Colorado Springs, CO, USA

fYear

1988

fDate

12-15 June 1988

Firstpage

946

Abstract

The use of a fourth-law envelope detector followed by a bandpass filter for detection of the symbol rate of a digitally modulated signal is investigated. The detector output spectrum is found and the output SNR is then used as a measure of performance. The effect of signal pulse shape, i.e. bandlimiting, on performance is studied. The performance of the fourth-law circuit, compared to that of a square-law device, is better for small excess bandwidth and high input SNR. However, it has a null in performance which depends on the pulse shape and the input SNR.<>

Keywords

band-pass filters; computerised signal processing; filtering and prediction theory; modulation; signal detection; bandlimiting; bandpass filter; detector output spectrum; digitally modulated signal; fourth-power envelope detector; output SNR; signal pulse shape; symbol-rate tone generation; Autocorrelation; Background noise; Bandwidth; Circuits; Envelope detectors; Pulse shaping methods; Pulse width modulation; Shape; Signal to noise ratio; Springs;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 1988. ICC '88. Digital Technology - Spanning the Universe. Conference Record., IEEE International Conference on

Conference_Location

Philadelphia, PA, USA

Type

conf

DOI

10.1109/ICC.1988.13697

Filename

13697