Transmitter & Receiver Design Architectures for RF Systems

Description

RF Signals are widely used in wireless communication, automation and the rapidly emerging phenomenon of Internet of Things (Iot) making RF technology essential in any device. This course describes and discusses key performance aspects of RF and wireless transceiver architectures. In this course you will learn about these types of RF transceiver architectures:

• Direct Conversion Transmitter and Receivers

• Hetrodyne Transmitter And Receivers

• Dual Conversion IF Receiver

• Sliding IF Receivers

• Zero Second IF Receiver

• Image Reject Receivers (Hartley & Weaver)

• Low IF Receivers

We will also study from the design perspective what are the drawbacks and the advantages of different architectures in a comparative manner, highlighting the design choices in different scenarios.

This online RF and microwave course is ideal for new entrants to the field of RF and microwave engineering. Students and job seekers will also find the course beneficial since it covers areas likely to arise during a technical interview. Technical sales engineers and technical managers who need to improve their understanding of RF and microwave communications in order to better manage projects. The contents of this course are:

Section 1: Introduction
  Modulation and Demodulation: Fundamental Requirement for RF Communication
  Amplitude Modulation in Time and Frequency Domain
  Amplitude Demodulation in Time and Frequency Domain
  The Bigger Picture: Transmitter Block Diagram
  The Bigger Picture-Receiver Block Diagram
  Quadrature Amplitude Modulation and Demodulation
  Quadrature Phase Shift Keying (QPSK) Modulation
  Quadrature Phase Shift Keying (QPSK) Demodulation
  Difference Between Frequency Band and Channel
  General Considerations for Narrow channel Bandwidth on Transmitter Side
  Considerations for Narrowband Receiver Side: Channel Selection Vs Band Selection

Section 2: RF Receiver Architectures
  Direct Conversion Receivers
     Drawbacks of Direct Conversion Receivers-Local Oscillator Leakage
     Local Oscillator Leakage Cancellation Technique
     Drawback of Direct Conversion Receivers: DC Offsets
     Cancellation of DC Offsets Using AC Coupling
     Draw Back Of Direct Conversion Receiver: Sensitivity to Even-Order Distortion
     Lecture 18:Solution to Even-Order Distortion
     Drawbacks of Direct Conversion Receiver: Effect of Flicker Noise
     I/Q Mismatch in Direct Conversion Receivers
     Analysis of I/Q Mismatch
     Analysis I/Q Mismatch with Gain Error
     Effect of I/Q Mismatch In presence of Phase Error
     Computation and Correction I/Q Mismatch
  Hetrodyne Receiver Architecture
     How A Heterodyne Receiver Receives Different Channels In a Given Frequency Band?
     Advantages of Hetrodyne Receiver Over Direct Conversion Receiver
     Problem of Image Frequency in Hetrodyne Receivers
     An Example of Image
     High Side and Low Side Injection
     Image Frequency Example 1
     Image Frequency Example 2
     Image Reject Filter
     Image Rejection Vs Channel Selection Trade-off in Hetrodyne Receivers
     Is Image Reject Filter Required In Absence Of Interferers?
  Dual Conversion IF Receiver
     Dual Conversion Receiver Noise Figure And Linearity Considerations
     Problems of Mixing Spurs in Dual Conversion Receivers
     Example Showing Effect Of Mixing Spurs
     Advantages and Disadvantages Of Dual Conversion IF Receivers
     Modern Hetrodyne Receivers
     Secondary Image Problem in Modern Dual Conversion Receivers
  Zero Second IF Receivers
     Demodulation of Symmetric Vs Asymmetric Signals in Zero 2nd IF Receivers
     Zero 2nd IF Receiver With Quadrature Downconversion for Asymmetric Signals
     Advantages of Zero Second IF Receivers
  Sliding IF Receivers
      Sliding IF Receivers: Divide by 2 Circuit
      Sliding IF Receivers: Divide by 4 Circuit
      Comparison of Divide by 2 and Divide by 4 Sliding IF Receivers
      Example: Sliding IF Receiver type for 802.11g
      Dual Band Zero Second IF Receiver
  Image Reject Receivers
      Phase Shift in Cosine Signal
      90 Degree Phase Shift in Modulated Signal
      How to Implement 90 degree Phase Shift: RC-CR Network?
      90 degree Phase Shift using Quadrature Downconversion with High Side Injection
      90 degree Phase Shift using Quadrature Downconversion with Low Side Injection
      Hartley Image Reject Receiver Architecture
      Realization of 90 Degree Phase Shift in Hartley Architecture
      Disadvantages of Hartley Image Reject Receiver
      Weaver Image Reject Receiver Architecture
      Secondary image problem in Weaver Architecture and Its Solution
  Low IF Receiver Architectures
       Image Rejection in Low IF Receivers

Section 3:RF Transmitter Architectures
   Characteristics of an RF Transmitter
   Direct Conversion Transmitters
      I/Q Mismatch in QPSK Direct Conversion Modulator
        I/Q Mismatch Quantification
        I/Q Mismatch Calibration-Phase Mismatch Removal
        I/Q Mismatch Calibration-Gain Mismatch Removal
      Effect Of Carrier Leakage in Direct Conversion Transmitters
        Reduction Of Carrier Leakage
      Effect of Mixer Non-Linearity in Direct Conversion Transmitters
      Effect of Non-Linearity in Power Amplifier and its Solution
      Problem Of Oscillator Pulling in Direct Conversion Transmitters and its Solution
        Solutions to Oscillator Pulling using Frequency Divider and Frequency Doubler
        Solution to Oscillator Pulling Using Mixing
        Single SideBand (SSB) Mixing To Solve Oscillator Pulling
        Corruption From Harmonics in Single SideBand (SSB) Mixing
        SSB Mixing To Generate Quadrature Output
        Direct Conversion Tx Using SSB Mixing
   Hetrodyne Transmitters
        Sliding IF Hetrodyne IF Transmitter
        Carrier Leakage In Hetrodyne Transmitters
        Problem of Mixing Spurs in Hetrodyne Tx Due To Local Oscillator Harmonics
        Use of SSB Mixing to Suppress the Unwanted Sidebands in Hetrodyne Transmitters
   On-off Keying (OOK) Transmitter and Receiver

Section 4:RF Transceiver Architectures
    What is an RF Transceiver?
    Time Division Duplexing (TDD) Transceiver
    Frequency Division Duplexing (FDD) Transceiver
    Tx-Rx Leakage in FDD Transceiver

TAKE THIS COURSE