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daleste
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Reducing cost
daleste   6/16/2014 10:12:56 PM
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Good plan to reduce the cost.  This will help to increase adoption.  I like the addition of speed limits using traffic sign recognition.  My GPS has the speed limit, but it depends on the database instead of actual, so it could be out of date.

DrQuine
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Re: Reducing cost - speed limit readers
DrQuine   6/28/2014 2:33:26 PM
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I hope the speed limit reader doesn't mistake highway numbers for speed limits.  In some areas they are quite similar. More significantly, if the reader misses a sign, it will report the previously observed limit.  In many areas this could be a very serious problem (small towns often have speed limit signs obscured by trees so the car will contnue to report an unrealistic 65 mph highway speed limit). Also, many roads continue for a considerable distance without a speed limit sign so the limit will be unknown. All in all, I'm predicting that the GPS database will prove more reliable.

daleste
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Re: Reducing cost - speed limit readers
daleste   6/28/2014 5:25:25 PM
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That's true, DrQuine.  I have missed speed limit signs on the highway when passing an 18 wheeler.  Maybe it shoud be a combination of database and visual.



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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