<s>
SpeakEasy	B-Device
was	O
a	O
United	O
States	O
military	O
project	O
to	O
use	O
software-defined	B-Architecture
radio	I-Architecture
technology	O
to	O
make	O
it	O
possible	O
to	O
communicate	O
with	O
over	O
10	O
different	O
types	O
of	O
military	O
radios	O
from	O
a	O
single	O
system	O
.	O
</s>
<s>
The	O
research	O
direction	O
of	O
the	O
SpectrumWare	O
project	O
was	O
heavily	O
influenced	O
by	O
two	O
software	B-Architecture
radio	I-Architecture
efforts	O
:	O
the	O
military	O
SpeakEasy	B-Device
project	O
and	O
the	O
commercial	O
products	O
of	O
the	O
Steinbrecher	O
Corporation	O
.	O
</s>
<s>
According	O
to	O
Upmal	O
and	O
Lackey	O
in	O
“	O
SPEAKeasy	B-Device
,	O
the	O
Military	O
Software	B-Architecture
Radio	I-Architecture
”	O
IEEE	O
Communications	O
Magazine	O
(	O
NY	O
:	O
IEEE	O
Press	O
)	O
1995	O
,	O
the	O
SpeakEasy	B-Device
project	O
was	O
started	O
in	O
1991	O
and	O
was	O
the	O
first	O
large-scale	O
software	B-Architecture
radio	I-Architecture
.	O
</s>
<s>
SpeakEasy	B-Device
was	O
motivated	O
in	O
large	O
part	O
by	O
the	O
communications	O
interoperability	O
problems	O
that	O
resulted	O
from	O
different	O
branches	O
of	O
the	O
military	O
services	O
having	O
dissimilar	O
(	O
non-interoperable	O
)	O
radio	O
systems	O
.	O
</s>
<s>
SpeakEasy	B-Device
had	O
a	O
very	O
aggressive	O
goal	O
of	O
implementing	O
ten	O
different	O
radio	O
waveforms	O
in	O
software	O
on	O
a	O
single	O
platform	O
.	O
</s>
<s>
The	O
designers	O
chose	O
the	O
fastest	O
DSP	B-Architecture
available	O
at	O
the	O
time	O
,	O
the	O
Texas	O
Instruments	O
TMS320C40	B-Architecture
processor	O
,	O
which	O
ran	O
at	O
40MHz	O
.	O
</s>
<s>
Since	O
this	O
was	O
not	O
enough	O
processing	O
power	O
to	O
implement	O
all	O
of	O
the	O
waveform	O
processing	O
,	O
the	O
system	O
boards	O
were	O
designed	O
to	O
each	O
support	O
four	O
’	O
C40s	O
as	O
well	O
as	O
some	O
FPGAs	B-Architecture
.	O
</s>
<s>
However	O
,	O
SpeakEasy	B-Device
could	O
not	O
take	O
advantage	O
of	O
these	O
newer	O
faster	O
processors	O
,	O
and	O
the	O
reason	O
was	O
the	O
software	O
.	O
</s>
<s>
The	O
software	O
was	O
tied	O
to	O
’	O
C40	O
assembly	O
language	O
,	O
plus	O
all	O
of	O
the	O
specialized	O
glue	B-General_Concept
code	I-General_Concept
to	O
get	O
four	O
C40s	O
to	O
work	O
together	O
with	O
the	O
code	O
for	O
the	O
particular	O
chosen	O
FPGA	B-Architecture
.	O
</s>
<s>
Further-more	O
,	O
a	O
software	B-Architecture
radio	I-Architecture
pushes	O
most	O
of	O
the	O
complexity	O
of	O
the	O
radio	O
into	O
software	O
,	O
so	O
the	O
software	O
development	O
could	O
easily	O
become	O
the	O
largest	O
,	O
most	O
expensive	O
part	O
of	O
the	O
system	O
.	O
</s>
<s>
These	O
observations	O
led	O
to	O
software	B-Architecture
portability	I-Architecture
being	O
a	O
key	O
goal	O
of	O
the	O
SpectrumWare	O
project.	O
"	O
</s>
