Wireless System Design and Simulation
Course 150
| San Jose, CA | Aug 23-Aug 27, 2010 |
| Course 150-4276 | Presented by Rowan Gilmore |
$2195  | |
Summary:
The purpose of this five day course is to understand the tradeoffs in designing wireless systems, and to show how to seamlessly move between both the circuit and system level in radio transceivers and other RF systems. We do this by looking at typical radio architectures, exploring the design tradeoffs, and simulating at both the circuit and system level. The course treats digitally coded signals in RF and IF components, and explores the compromises that are inherent in the design of a radio transceiver. From the RF perspective, the need to minimize interference from nearby unwanted stronger signals and to allow detection of a desired signal in noise is critical. Avoiding corruption of other signals sharing the spectrum is equally critical. Achieving both together is not so simple! In wireless LAN for instance, we will see how tradeoffs made to solve one problem, like multipath reception, have placed tight constraints on other parts of the system, such as the linearity of the power amplifier. We will interactively simulate a double super-heterodyne, dual-band radio receiver, a direct conversion receiver, and an I-Q modulator and transmitter, as well as multiple components. This provides the opportunity to explore 'what if?' scenarios.Students are encouraged to bring their laptop computers to class. The design software available for use in this public course is from Applied Wave Research (AWR).
Learning Objectives:
Upon completing the course, the participant will be able to:- describe the air-interface (physical layer) specifications of a mobile radio system, and understand how the key parameters relate to RF hardware
- simulate various types of RF and IF systems and component interactions
- select and specify the key components within a system to meet its RF and systems requirements
- read integrated circuit data sheets for wireless systems and understand their architecture and specifications
- understand the compromises in choosing architectures and circuits to meet given system requirements.
Target Audience:
Engineers, programmers, chip designers, and engineering managers involved in the design, planning, implementation, or testing of communication systems would benefit from this intermediate-level course. Participants should have a BSEE or equivalent.Outline:
Day One
Review of Communication and Information Theory Principles• Coding and Modulation Formats • Baseband Filtering and Digital Sampling • Typical Receiver System Architectures : Direct Conversion, Superheterodyne, Dual Conversion Superheterodyne
Day Two
Characterization of Receivers• Noise in Receivers • Selectivity, Sensitivity and Minimum Detectable Signal • Nonlinearities and Third-Order Intermodulation (TOI/IP3) Distortion • Reception in the Presence of Interferers • Dynamic Range and How to Improve It with AGC
Characterization of Transmitters
• Power and Harmonic Distortion • Spurious Products • ACPR, Spectral Regrowth and Linearity with different modulation formats • Efficiency
Frequency Selection
• The Image Frequency • Choosing the Correct IF
Day Three
Systems Simulation - Behavioral ModelingSimulation of the Dual-band CDMA Superhet Radio Receiver
• Spreadsheet-based Linear Systems Analysis • Calculation of Sensitivity and Dynamic Range • Systems Simulation • Using AGC to Increase the Dynamic Range • Effect of Changing the Gain, Intercept Point, and Filtering
Mixers/I-Q Modulators
• Spurious Analysis • Image Reject Mixers • I-Q Modulators and the importance of quadrature • Basics of Mixer Design
Day Four
Oscillators/Phase Noise• Basic Concepts of Oscillator Design • Phase Noise in Oscillators • Calculating the Allowable Phase Noise from the System Specifications
Power Amplifiers
• Design Tradeoffs between Linearity, Power, and Efficiency • Classes of Amplifier Operation • Simulation of Spectral Regrowth with Different Modulation Formats • Examples of Commercial Integrated Sub-Systems-on-Chip • Simulation of a Radio Transmitter
Day Five
Topics in Software Defined Radio• ADC and DSP Issues • Transceiver Issues
Simulation of a Direct Conversion Receiver
• Trade-off between Modulation Scheme, Data Rate, RF Bandwidth, Channel Filter, Power, Noise, Phase Noise, and Bit-Error Rate
Interpreting Air Interface Specifications
• CDMA (Narrowband and Wideband) • Sample 3G WCDMA Requirements • Design Considerations of a typcial GaAs and CMOS Chip Set
Subject Areas Covered
RF Systems Integration/Transceiver ArchitectureRF Circuit Design (Nonlinear): Power Amps, Mixers, Oscillators
Modulation Techniques
Software Defined Radio and Next Generation Hardware
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