How to make a single Rx to get data from 64 Txs?
I have 64 transmitter at 433Mhz band ,they are 25khz channel spaced,(each channel is 25KHZ in bandwitdh,and modulation is FSK ,baudrate of data is 1200bps,freq deviationis 2.475KHZ)
Each TX send data with no stop at its channel,I want to make a single RX and single antenna to get all 64 TX data,How can I do this?
I think I have to use digital processing for all 64 channels at baseband is it correct?
Is there any available ICs and processors?
You could process them all at once in one mondo DSP. You would have to be VERY careful that the receiver is designed to have a very high compression point. Otherwise, the energy from an adjacent couple of bands will plop right onto one of the weaker channels and cause havoc. You will also find that you need a lot of bits in the ADC chip to pull it off.
The brute force approach would be to downconvert all 64 transmitters into seperate IFs, with a trivial processor (analog or digital FM detector and a 1 bit ADC). You would probably need a seperate IF variable gain stage and some good IF filtering to pull it off.
Is there any ebook or article on this type of receiver design?
Is there any DSP to process all 64channel realtime?(part number?)
Is there any dedicated processor for this application?
What ADC resolution is needed for this system?(is 12bit ok?)