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Processing of Radar Signal Received in Presence of Noise
Rating: 4.1 out of 5(2 ratings)
51 students

Processing of Radar Signal Received in Presence of Noise

Weak Radar echo signal reception
Created bySachin Ruikar
Last updated 6/2023
English
English [Auto],

What you'll learn

  • Understand the importance of Matched Filter Receivers in Radars to improve the signal to noise ratio. .
  • Identify the type of antenna used in radar receiver that can be used for scanning and tracking.
  • Categorize the noise received at receiver front end to obtain noise figure that includes noise temperature.
  • Select the suitable duplexer at Radar receiver that may act as switch while transmission and reception of signal.

Course content

2 sections • 7 lectures • 4h 54m total length

  • Introduction to Phased array Antenna44:46

    Introduction to phased array antennas using linear and planar arrays of identical elements. Explore how amplitude and phase control enable electronic beam steering, with broadside and end-fire patterns for radar.

  • Phased array antenna and beam steering45:34

    Explore phased array antennas and beam steering, analyzing how element spacing, uniform amplitude, and phase differences shape the radiation pattern and enable electronically steered beams.

  • Radar receiver and Noise44:35

    Explain how a radar receiver distinguishes the desired target signal from noise and clutter using filters, amplification, thresholds, and display processing to improve the signal-to-noise ratio.

  • Mixer at radar receiver45:32

    Explore how the radar receiver mixer converts rf to if, and how noise figure, temperature, and conversion loss affect sensitivity; examine balanced mixers, image frequency, and matching with narrowband filtering.

  • Receiver Noise Figure, Displays and Duplexer46:11

    Explains how RF losses in the receiver front end shape the noise figure; describes how a duplexer isolates transmitter and receiver to protect radar performance.

  • Circulator as Diplexer and Matched Filter46:57

    Explore how a circulator acts as a diplexer to separate transmit and receive paths, while a matched filter optimizes the radar receiver’s signal-to-noise ratio within an appropriate bandwidth.

  • Matched Filter Receiver with White noise and non White noise21:23

    Explore matched filter receivers for radar signals in white and non-white noise, maximizing signal-to-noise ratio through optimal bandwidth, cross-correlation, and whitening steps.

Requirements

  • Basic knowledge of communication required

Description

This course presents the radar receiver in brief. It contains the radar receiver components such as antenna, duplexer, filter etc. The weak signal received at radar receiver contains noise that has noise figure and noise temperature. The selection of antenna in radar receiver is discussed. Discussion of array antenna and its type such as broadband array antenna and end fire array antenna is explained in this course. The radiation pattern and beamwidth requirement is explained in this course. The phased array antenna basic concepts and radiation pattern is explained in this course. The antenna at receiver mainly needs beam steering and beamwidth variables for various applications. The advantages and limitations of phased array antenna are explained. The display types used at radar receiver discussed with suitable applications. The selection of duplexer used in radar receiver is explained. The duplexer has two type branch type and balanced type, which is explained in detail with suitable diagram. This course introduces the matched filter receiver. The matched filter receiver derivation is explained with mathematical terms and elaborated for suitable use. Its characteristics and response are explained in this course. It describes the correlation function and cross correlation receiver. Efficiency of non-matched filter is elaborated in this course. It explains the matched filter with white and non-white noise in this course.

Who this course is for:

  • Learner to understand the signal detection at radar receiver.
  • Understand the various noise sources that may degrade the signal quality.

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