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en.wikipedia.org/wiki/Intermediate_frequency

A first intermediate frequency may even be higher than the input signal, so that all undesired responses can be easily filtered out by a fixed-tuned RF stage. In a digital receiver, the analog to digital converter operates at low sampling rates, so input RF must be mixed down to IF to be processed. Intermediate frequency tends to be lower ...

www.allaboutcircuits.com/textbook/radio-frequency-analysis...

Many RF systems incorporate an intermediate frequency (IF) that is lower than the carrier frequency and higher than the baseband frequency. An IF-based receiver is known as a heterodyne receiver. The use of an IF simplifies the design of tunable receivers and reduces the number of components that must be compatible with high frequencies.

welkinsciences.com/docs/FAST_Architecture_MILCOM_2014e2.pdf

a class of digital intermediate frequency (IF), or “all digital,” strategic fixed SATCOM terminals. The resultant standard is currently undergoing verification and validation through prototyping. Upon successful verification and validation, the OSDI shall be published. II. FAST ARCHITECTURE: SUBSYSTEMS AND OSDI

coreel.com/.../radar/digital-intermediate-frequency-receiver-board

Digital Intermediate Frequency (DIF) Receiver Board is a FPGA based high speed data acquisition board. High speed ADCs are used for digitization of analog IF signals and Virtex-5 series FPGAs for front-end digital signal processing and data streaming over high speed links.

literature.cdn.keysight.com/litweb/pdf/5991-1649EN.pdf

The baseband signal is converted to an intermediate frequency and radio frequency (IF and RF) using an up- converter. There are three principal up-conversion methods: – Analog up-conversion – Software up-conversion – Digital up-conversion Analog up-conversion This is the traditional method of up-conversion. As with

literature.cdn.keysight.com/litweb/pdf/5992-0769EN.pdf?id=2618845

Once a signal has been digitized it is no longer at an intermediate frequency. At that point, the signal is represented by digital data values. The term ”digital IF” describes the digital processing that replaces the analog IF processing found in traditional receivers and spectrum analyzers.

www.stoneliu.com/category/digital-intermediate-frequency

Category:digital intermediate frequency What is digital intermediate frequency? The digital intermediate frequency is just as the name displayed which is the signal state of the medium frequency.

www.amergint.com/digital-if-software-defined-modems

This has key advantages, but first let’s explore what Digital IF is. IF is short for Intermediate Frequency. Rather than having an RF or 70 MHz analog signal as the intermediate frequency, Digital IF provides a digitized sample representation of that same signal. The digitized samples can then be processed entirely in software.

www.ti.com/lit/wp/snaa107/snaa107.pdf

As the ADC input frequency increases, the Signal-to-Noise Ratio (SNR) for large signals will decrease due to clock jitter. Small signal SNR is not affected. For the ADC12DL080, the large signal SNR will be 65 dBFS (dB relative to Full Scale) at a 244 MHz IF. When the Intermediate Frequency (IF) Sampling Receiver Concepts ANALOG edge SM

www.reference.com/science/intermediate-frequency-52620cd69...

An IF, or intermediate frequency, is a transitional radio frequency situated between two other frequencies. It is often created by mixing two frequencies together via a signal enhancement process called heterodyning. An IF signal can be used to move information between frequency channels and to filter out unwanted signal information.