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Bluetooth Gets a Boost

Proponents prep for mesh, higher bandwidth
3/15/2016 11:00 AM EDT
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Ndutton1973
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RS232
Ndutton1973   3/16/2016 11:53:26 AM
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This article stated Bluetooth started as a wireless audio link, it didn't, it was designed by Ericsson as an RS232 replacement in 1994 I believe. The problem with this protocol as all protocols, it took about 10 years to find 'home', home for BT became wireless audio links. The full circle came about with smartphones, BT was in them and it made an obvious option for RS232 again and hence a good option for 'IOT'

rick merritt
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Re: 2Mbps modulation
rick merritt   3/15/2016 3:54:03 PM
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@y_sasaki Good perspective, Thx! I'll see if I can get someone from the BT SIG to chime in.

Meanwhile I updated the article with some good business perspective from an analyst at ABI Research.

y_sasaki
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2Mbps modulation
y_sasaki   3/15/2016 2:29:47 PM
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"Bluetooth at 2Mbps" sounds familar, it has been applied to Bluetooth classic EDR (Enhanced Data Rate) as QPSK 2Mbps and 8-PSK 3Mbps modulation scheme.Symbol coding rate is same 1Msymbol/sec but bit/symbol is double (QPSK) or triple (8-PSK). However, it sounds like BLE 2Mbps is different from classic EDR.

I came accross US patent US 20140086125 A1 issued by Broadcomm, claiming "Enhanced rate physical layer for bluetooth™ low energy".  As far as I've read, it still use GFSK modulation but double the symbol coding rate from 1Msymbol/sec to 2Msymbol/sec. Is this the so-called "2Mbps BTLE"?

http://www.google.com/patents/US20140086125

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