converting signal to baseband signal
Try "RF Microelectronics" By Behzad Razavi. or "Microwave and RF Design of Wireless Systems" by David M Pozar.
A quick answer to Question: The trend in digital domain is to digitize the RF signal as soon as possible. We are seeing more multiple bit (>8bits) High speed ADC (>2GHz) in the market. Ideally, you just need to include a LNA before the ADC, and after digitization, process the data in digital domain.
Added after 21 seconds:
Try "RF Microelectronics" By Behzad Razavi. or "Microwave and RF Design of Wireless Systems" by David M Pozar.
A quick answer to Question: The trend in digital domain is to digitize the RF signal as soon as possible. We are seeing more multiple bit (>8bits) High speed ADC (>2GHz) in the market. Ideally, you just need to include a LNA before the ADC, and after digitization, process the data in digital domain.