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Combiner Performance Using Narrow-Band Noise Filtering and Enhanced Squelch

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1 Author(s)
Florman, E. ; National Bureau of Standards, Boulder, CO, USA

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.

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Communication Technology, IEEE Transactions on  (Volume:16 ,  Issue: 3 )