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Noise immunity

Lecture



Immunity - the ability of the receiver to ensure the reception of transmitted or extracted information with a given reliability.

Increased noise immunity is ensured by all types of selectivity, as well as the creation of optimal (quasi-optimal) receiver structures and special measures to combat interference in processing received signals.

created: 2014-09-12
updated: 2026-03-09
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Lectures and tutorial on "Devices for the reception and processing of radio signals, Transmission, reception and processing of signals"

Terms: Devices for the reception and processing of radio signals, Transmission, reception and processing of signals

Basic concepts and definitions in the field of communication
Generalized block diagram of a communication system
Main characteristics of telecommunication signals
3.4 Channels of telecommunication
3.5 General information about communication networks
4.1 Radio Signal Models
4.2 Harmonic analysis and signal synthesis
4.3 Primary telecommunication signals
4.4 Radio interference. Interference protection
5.1 General information about modulation Types of modulation of the received signal
5.2 Amplitude Modulation
5.3 Frequency Modulation
5.4 Phase Modulation
5.5 Pulse sequence modulation (pulse modulation)
6.1 Radio Wave Overview
6.2 Physical characteristics of the propagation medium of radio waves
6.3 Features of the propagation of radio waves of different ranges
7.1 Antenna-feeder devices
7.2 Radio receivers
7.3 Radio transmitting devices
8.1 Radio relay communication systems
8.2 Satellite communication systems. General information
8.3 Main characteristics of satellite communication systems
8.4 Satellite services
9.1 Physical Basics of Optical Image Transmission
9.2 Block diagram of the black-and-white image transmission system
9.3 Transferring color images
10.1 Personal Radio Call Systems
10.2 Professional Mobile Radio
10.3 Cellular mobile systems
10.4 Cordless telephone systems
11.1 standardization organizations in communication
Classification of radio receivers
Detector receivers
Regenerative Radios
Superregenerative radio receivers (superregenerators)
Direct Gain Receivers
Superheterodyne receivers
Infrared receivers
Range of working frequencies of radio receivers
Radio dynamic range
Sensitivity of the receiving device
Radio receiver selectivity (by adjacent channel and by side receiving channels) Multi-signal selectivity
Fidelity to play messages
Noise immunity
Electromagnetic Compatibility (EMC)
The receptivity of the receiver to external influences
Receiver power
The main structural and operational characteristics of the receivers.
The main ergonomic indicators of the receiver
The main production and economic characteristics of the receiver
Internal noise of radio reception and processing devices
Receiver noise figure
The noise temperature of the quadrupole
Noise sensitivity PRRU (real)
Block diagram of the input circuit of the receiver
Classification of input circuit receiving devices
The main characteristics of the input circuit of receiving devices
Tuning receiver in the frequency range
Generalized equivalent circuit of a single-loop input receiving device
Transfer ratio in complex form
The resulting parameters of the input circuit
Resonance gain
input device noise figure and input device noise figure
Input circuits when working with an unconfigured antenna. General information
Input circuit with a transformer coupling receiver
Input circuit with capacitive coupling receiver
Input circuits when working with tuned antennas. General information
Transformer Coupled Input Receiver
Radio input device with autotransformer connection
Receiver input circuit with electronic tuning
Purpose and main characteristics of radio amplifiers
Resonant Amplifier Circuits
General analysis of the resonant amplifier
The influence of the internal OS on the properties of the resonant amplifier
Condition of stable operation of the amplifier
Methods for increasing the stability of resonant amplifiers
General information about frequency converters
General theory of frequency conversion
Frequency response of the frequency converter
Schumann Resonance (Schumann resonance)
Synchrodin (superheterodyne with zero IF) and the principle of operation of this receiver, Radio direct conversion
Direct gain receiver
Superheterodyne receiver
Double frequency conversion superheterodyne receiver
Selection of the architecture of the main signal receiving path. Types of receivers
Automatic adjustment schemes. Apch system (automatic frequency control) radar (Radar station)
Automatic adjustment circuits Automatic gain control (AGC)
Demodulators. 1. Amplitude detectors
Demodulators.2 Phase Detectors
Demodulators 3 Frequency Detector
Demodulators 4 Demodulators of digital modulation types
Intermediate Frequency Amplifiers (UHF) 1. Main Selectivity Filters
Intermediate frequency amplifiers. 2 Linear Amplifiers
Intermediate frequency amplifiers. 3 Amplifier of the second intermediate frequency for angular modulation types (amplifier-limiter)
Input circuits. 1 Duplex radio stations
Input circuits. 2 Input siders
Input circuits. 3 receiver input filter
Input circuits. 4 RF amplifiers
Mixers 1. Mixer parameters (frequency converter)
Mixers 2 Principle of operation of the mixer (frequency converter)
Mixers 3 diode mixer
Mixers 4 Balanced Mixers
Mixers 5 Ring mixers (frequency converters)
Mixers 6 transistors mixers
Mixers 7 Mixers with mirror channel suppression
Heterodyne 1 parameters of the local oscillators
The local oscillators 2 oscillator circuit generators
Heterodyne 3 Features of quartz oscillator frequency stabilization
Heterodyne 4 Reference Generators
Heterodyne 5 frequency synthesizers
Software-defined radio