BT to get more bandwidth

CSR is actively developing BT v1.2 EDR chipsets along with others with a
max bandwidth of 2.1Mbs using a different modulation scheme (PSK).

"Enhanced data rate (EDR) Bluetooth will offer users a number of
significant advantages, and open up new application areas for the
technology. Although the most obvious improvement will be in terms of
speed - accelerating large data transfer operations, such as sending
high resolution image files from a phone or digital camera to a PC - the
reduced transmission time will also yield a significant power-saving
benefit. The new standard offers a maximum data transfer rate of
2.1Mbps - which is three times faster than the current 721kbps for v1.2
standard rate." Luke D'Arcy and/or Chris Lowe, CSR.
From:
http://www.csr.com/enews/hw013.html

"Bluetooth EDR achieves the higher data rate by making a move from the
GFSK (Gaussian frequency shift keying) modulation used in Bluetooth 1.2
to PSK (phase shift keying). Existing Bluetooth devices will be able to
work with EDR devices because the spec still uses GFSK for packet
headers, uses the same process for link establishment, and sticks with
the same packet timing and structure. In fact, the symbol-transmission
rate of 1 megasymbol per second also remains unchanged. PSK simply
allows each symbol in the packet payload to carry more bits." Matthew
Miller, EDN.
From:
http://www.reed-electronics.com/ednm...dustryid=22043

Unanswered is how this will effect range. PSK modulation is more robust
than GFSK so should need less error correction & retransmission but
probably not by a factor of 3. Interoperability testing is about to
start.

--
The map is not the territory