<s>
The	O
OpenHPSDR	B-Device
(	O
High	O
Performance	O
Software	B-Architecture
Defined	I-Architecture
Radio	I-Architecture
)	O
project	O
dates	O
from	O
2005	O
when	O
Phil	O
Covington	O
,	O
Phil	O
Harman	O
,	O
and	O
Bill	O
Tracey	O
combined	O
their	O
separate	O
projects	O
to	O
form	O
the	O
HPSDR	B-Device
group	O
.	O
</s>
<s>
SDR	B-Architecture
,	O
Envelope	O
Elimination	O
and	O
Restoration	O
)	O
without	O
the	O
need	O
to	O
replace	O
the	O
entire	O
set	O
of	O
boards	O
.	O
</s>
<s>
The	O
project	O
has	O
expanded	O
from	O
the	O
original	O
group	O
,	O
and	O
several	O
additional	O
people	O
have	O
been	O
involved	O
in	O
recent	O
HPSDR	B-Device
module	O
designs	O
.	O
</s>
<s>
The	O
core	O
modules	O
of	O
the	O
project	O
are	O
the	O
Atlas	O
passive	O
backplane	O
,	O
the	O
Ozy	O
interface	O
which	O
provides	O
a	O
USB	O
2.0	O
data	O
channel	O
between	O
the	O
HPSDR	B-Device
system	O
and	O
the	O
host	O
PC	O
,	O
and	O
the	O
Mercury	O
and	O
Penelope	O
receiver	O
and	O
exciter	O
boards	O
,	O
which	O
use	O
high	O
speed	O
ADCs	O
and	O
DACs	O
for	O
direct	O
conversion	O
of	O
received	O
or	O
transmitted	O
signals	O
in	O
the	O
DC	O
to	O
55MHz	O
frequency	O
range	O
.	O
</s>
<s>
Mercury	O
has	O
attracted	O
wide	O
interest	O
within	O
the	O
HPSDR	B-Device
community	O
as	O
a	O
general-coverage	O
,	O
high	O
performance	O
,	O
HF	O
receiver	O
.	O
</s>
<s>
The	O
host	O
computer	O
uses	O
DSP	O
techniques	O
to	O
process	O
the	O
digital	O
bitstream	O
it	O
receives	O
from	O
the	O
HPSDR	B-Device
system	O
.	O
</s>
<s>
Currently	O
,	O
the	O
HPSDR	B-Device
hardware	O
has	O
been	O
interfaced	O
with	O
the	O
Flex-Radio	O
PowerSDR	O
Windows-based	O
software	O
,	O
which	O
is	O
licensed	O
under	O
the	O
GPL	B-License
.	O
</s>
<s>
As	O
of	O
February	O
,	O
2011	O
,	O
the	O
following	O
HPSDR	B-Device
modules	O
have	O
been	O
released	O
:	O
</s>
<s>
In	O
cooperation	O
with	O
the	O
HPSDR	B-Device
group	O
,	O
TAPR	O
has	O
provided	O
(	O
or	O
will	O
provide	O
)	O
all	O
the	O
modules	O
listed	O
above	O
.	O
</s>
<s>
A	O
web	O
site	O
and	O
Wiki	O
provide	O
further	O
information	O
about	O
the	O
HPSDR	B-Device
projects	O
.	O
</s>
<s>
The	O
HPSDR	B-Device
project	O
is	O
open-source	O
for	O
software	O
and	O
uses	O
a	O
combination	O
of	O
licenses	O
for	O
the	O
hardware	O
.	O
</s>
<s>
There	O
are	O
many	O
complete	O
transceivers	O
that	O
are	O
based	O
on	O
the	O
OpenHPSDR	B-Device
concept	O
:	O
</s>
