how to separate rf and ook signal

i am having rf+dc+ook combined signal.i want to separate these signals.what what method i should implement so that i can separate these signals,please help me

I can't understand what you want to do ?

What do you mean by "separate these signals" ?

i am using a bias t.the out put is rf+dc+_ook signal. i want to convert ook signal to RS 485.

Still I can't understand what you want to do.
Even if you use Bias-Tee, you can not create OOK(ASK) signal.

Use industrial standard and correct terminologies.

What you want to do is a demodulation or detection of modulation signal of OOK(ASK) ?

http://en.wikipedia.org/wiki/Envelope_detector
http://www.st-andrews.ac.uk/~www_pa/...rt9/page2.html
http://www.maxim-ic.com/app-notes/index.mvp/id/3671
http://www.analog.com/en/rfif-compon...cts/index.html

i am having a signal from bias t, comprises of rf+dc+ook signal,i am providing this signal to a TMA unit,there i am having a microcontroller, i want to feed this ook signal to microcontroller.how can i implement ?

What is "TMA unit" ?

Again what you want to do is a demodulation or detection of modulation signal of OOK(ASK) ?