I am trying to increase the range of communication between two SDRs to simulate near space communication. The output power of TX is 10dBm but I would need 37dBm for near space communication. That would mean that a power amplifier would be required at the transmitter side. I am wondering if it is possible to do without the power amplifier at TX and instead increase the RX's power to receive a stronger signal by using a high gain antenna for RX? Would it be possible to amplify the signal at RX with an amplifier?
Communication is not a field that I am familiar with. Would greatly appreciate any advice given!
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Thank you for the answers given by everyone, I really appreciate them!
I am planning to conduct transmission and receiving of txt file using SDRs. I have decided to utilise a ground station in my university to receive the signal from the transmitting SDR, which is controlled by Rpi. I will be using attenuation at ground station to simulate the environment of near space transmission of 30km. The actual physical distance is across a building
My transmitting set up will be Raspberry Pi 3B+, LimeSDR, LimeSDR antenna, ANT500 Telescopic antenna. I am planning to transmit at 433MHz and 2.4GHz at the same time. I will be using BPSK modulation.
My receiving set up will be a ground station, which I assume that I could adjust the gain of the antenna.