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Technology Stocks : Qualcomm Moderated Thread - please read rules before posting -- Ignore unavailable to you. Want to Upgrade?

To: mightylakers who wrote (3631)	10/11/2000 4:37:00 PM
From: John Walliker	Respond to of 196652

mightylakers, A great read from RB The Sound of Silence Summer Review Issue: Part 2 ... Just a couple of points. GSM does make use of the silences between words, although not as efficiently as CDMA, by "discontinuous transmission" where the speech coder switches to a very low data rate in the gaps between utterances. This reduces the background interference level affecting nearby cells on the same frequency. GSM does make use of multipath signals (although not as efficiently as CDMA) through the use of an adaptive filter which is re-adapted for each received pulse using a Viterbi algorithm based on a training sequence embedded in the middle of each pulse. John