Hello everyone. I am been lurking on here for days and doing reading and watching videos on LimeSDR for a few weeks now. I think I finally have enough information to ask few a questions understand the answers I get. I am thinking of getting a LimeSDR for designing a FMCW radar capable of ranging small drones at least upto 300 meters. I have read about FMCW radar and have some basic theoretical understanding. I have also read similar project done by Luigi LimeSDR CW radar. Now I have few questions that am not sure about and need some insights on.
I am thinking of choosing of 3GHz (I have read legality of transmitting such a signal in my country) as my starting frequency and have a bandwidth of 100Mhz that is, use a sawtooth to generate a chirp ramping from 3 Ghz - 3.1Ghz with a ramp time of 5ms. Is this possible with LimeSDR?
I know the stated bandwidth of LimeSDR is 61.44Mhz this will limit my radar bandwidth and reduce my range resolution. Now I know that LimeSDR has 2 receive channel, would I be able to use
- RX1_2/RX2_2 = High band specific > 1.5GHz
- RX1_3/RX2_3 = Broadband 100kHz to 3.8GHz
to listen to half of the transmitted 100Mhz band each and then combine them to increase my bandwidth?
I have a lot of other questions I would like to ask but I like to get these answers first. Thank you!!