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#1
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RS-232 Rf module
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). |
#3
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RS-232 Rf module
"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 |
#4
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RS-232 Rf module
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. |
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