Title :
Combiner Performance Using Narrow-Band Noise Filtering and Enhanced Squelch
Author_Institution :
National Bureau of Standards, Boulder, CO, USA
fDate :
6/1/1968 12:00:00 AM
Abstract :
The use of "narrow-band" noise filters in the combiner control circuits of a quadruple-diversity post-detection combiner was found to reduce the average bit-error rate by a factor of 4.6; while the median output signal-to-noise ratio was increased by 2 dB. The use of an "enhanced-squelch" control of the postdetection combiner increased the output voice-channel signal-to-noise ratio by 3 dB, and effectively eliminated a high percentage of the noise bursts in the voice channels.
Keywords :
Band pass filters; Bandwidth; Circuit noise; Filtering; Frequency modulation; Narrowband; RF signals; Radio control; Signal to noise ratio; Telecommunication control;
Journal_Title :
Communication Technology, IEEE Transactions on
DOI :
10.1109/TCOM.1968.1089875
