hi,
I am working on an FPGA project.
It is a CDMA-based point-to-point communication system; two FPGAs each
works as a transceiver.
The final stage of the project is to send the data via the serial port
(RS-232) to an RF module.
Can any one support me a low-cost, serial (RS-232) Rf module capable of
managing data rates up to 1.25 Mb/s and working reliably within
buildings giving a suitable range ( 10 meters).

In article .com,
(known to some as ayman) scribed...

hi,
I am working on an FPGA project.
It is a CDMA-based point-to-point communication system; two FPGAs each
works as a transceiver.
The final stage of the project is to send the data via the serial port
(RS-232) to an RF module.
Can any one support me a low-cost, serial (RS-232) Rf module capable of
managing data rates up to 1.25 Mb/s and working reliably within
buildings giving a suitable range ( 10 meters).

With that high of a data rate, I wouldn't use RS232. You'd be
better off with V.35 or perhaps RS485.

Happy tweaking.


--
Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute
(Known to some as Bruce Lane, KC7GR)
http://www.bluefeathertech.com -- kyrrin a/t bluefeathertech d-o=t calm
"Salvadore Dali's computer has surreal ports..."

"ayman" wrote in message
oups.com...
hi,
I am working on an FPGA project.
It is a CDMA-based point-to-point communication system; two FPGAs each
works as a transceiver.
The final stage of the project is to send the data via the serial port
(RS-232) to an RF module.
Can any one support me a low-cost, serial (RS-232) Rf module capable of
managing data rates up to 1.25 Mb/s and working reliably within
buildings giving a suitable range ( 10 meters).

Pretty demanding requirement. RS-232 at 1.25 Mb/s? I thought RS-232 topped
out at 115200 or 230400 bps? That's the max you'll see for commercial RS-232
RF Modems, e.g., http://www.maxstream.net/, and they list in the low
$hundreds per end.

Another approach is to use a serial device server,
http://www.neteon.net/cat.aspx?clvl=3&c1=1&c2=3&c3=13, connected to a Wi-Fi
network. Similar caps on serial speed, although one model claims 921.6 kbps
max, the SSE-100.

Tom

ayman wrote:
hi,
I am working on an FPGA project.
It is a CDMA-based point-to-point communication system; two FPGAs each
works as a transceiver.
The final stage of the project is to send the data via the serial port
(RS-232) to an RF module.
Can any one support me a low-cost, serial (RS-232) Rf module capable of
managing data rates up to 1.25 Mb/s and working reliably within
buildings giving a suitable range ( 10 meters).

Wow, three requirements "low-cost", "serial", and "data rates 1.25
Mb/s via RF " that are all self-contradictory :-).

*And* the device already has CDMA hardware in it.

An ethernet terminal server (ala Lantronics) hooked to a
high-throughput WiFi system might begin to meet what you want, while
you won't get 1.25 Mb/s you might reliably get a tenth of that with
some latency.

I cannot guarantee anything about WiFi interacting with CDMA
performance and in fact I would be pleasantly surprised if there were
zero effect.

Why does the device need CDMA on one side *AND* improbably
high-bandwidth serial via wireless on the other?

Tim.