Communication System Design Using DSP Algorithms : With Laboratory Experiments for the TMS320C6701 and TMS320C6711

With Laboratory Experiments for the TMS320C6701 and TMS320C6711

By: Steven A. Tretter

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Paperback | 1 January 2003 | Edition Number 22

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328 Pages

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Designed for senior electrical engineering students, this textbook explores the theoretical concepts of digital signal processing and communication systems by presenting laboratory experiments using real-time DSP hardware. The experiments are designed for the Texas Instruments TMS320C6701 Evaluation Module or TMS320C6711 DSK but can easily be adapted to other DSP boards. Each chapter begins with a presentation of the required theory and concludes with instructions for performing experiments to implement the theory. In the process of performing the experiments, students gain experience in working with software tools and equipment commonly used in industry. The primary focus of this book is on communication systems. Algorithms that are particularly suited to DSP implementations are presented.

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Non-Fiction Computing & I.T.Computer Science Digital Signal Processing (DSP)Computer Hardware Personal Computers Graphical & Digital Media Applications 3D Graphics & Modelling Computer Programming & Software Development Algorithms & Data Structures Engineering & Technology Electronics & Communications Engineering

Communications Engineering & Telecommunications Education Energy Technology & Engineering Electrical Engineering Electronics Engineering Electronic Devices & Materials Microprocessors

Overview of the Hardware and Software Tools	p. 1
Some DSP Chip History and Typical Applications	p. 2
The TMS320C6701 and 6711 Floating-Point DSP's	p. 6
The 'C6000 Central Processing Unit (CPU)	p. 6
Memory Organization for the TMS320C6701	p. 12
Memory Organization for the TMS320C6711	p. 13
Direct Memory Access Controllers	p. 13
Serial Ports	p. 14
Other Internal Peripherals	p. 15
Brief Description of the TMS320C6000 Instruction Set	p. 15
Parallel Operations and Pipelining	p. 16
The TMS320C6701 Evaluation Module (EVM)	p. 20
The CS4231A Stereo Codec Interface	p. 22
The TMS320C6711 DSP Starter Kit (DSK)	p. 24
The Audio Interface Onboard the 'C6711 DSK	p. 25
The PCM3003 Audio Daughter Card	p. 26
Software Support for the EVM and DSK Boards and 'C6x DSP's	p. 28
Software Support for the 'C6701 EVM	p. 28
Software Support for the 'C6711 DSK	p. 30
Code Composer Studio	p. 31
Project Files and Building Programs	p. 31
The Optimizing Compiler and Assembler	p. 31
The Linker	p. 33
Building Programs from Command Line Prompts	p. 33
The Archiver	p. 34
Additional Code Composer Studio Features	p. 34
Other Software	p. 34
Digital Filter Design Programs	p. 35
Commercial Software	p. 35
Introductory Experiments	p. 36
Learning to Use the Hardware and Software Tools	p. 37
Getting Started with a Simple Audio Loop Through Program	p. 37
A Beginning C Program and Linker Command File	p. 37
Creating a CCS Project for evmstart.c	p. 44
Testing evmstart.out	p. 45
More Details on the McBSP Serial Ports and Codecs	p. 46
Basic McBSP Transmitter and Receiver Operation	p. 47
Useful Functions in the C6x Peripheral Support Library	p. 48
Example C Code for Reading and Writing the EVM Codec	p. 49
The 'C6000 Timers	p. 51
Method 1: Generating a Sine Wave by Polling DXR	p. 52
Instructions for the Polling Experiment	p. 53
Method 2: Generating a Sine Wave Using Interrupts	p. 54
The CPU Interrupt Priorities and Sources	p. 55
What Happens When an Interrupt Occurs	p. 56
TI Extensions to Standard C Interrupt Service Routines	p. 59
Using the Peripheral Support Library for Interrupts	p. 60
Instructions for the Experiment of Generating Sine Waves by Using Interrupts	p. 62
Method 3: Generating a Sine Wave by DMA From a Table	p. 64
The DMA Control Registers	p. 65
Major Steps for Setting Up a DMA Transfer	p. 65
DMA Autoinitialization	p. 67
Triggering DMA Transfers	p. 68
Split-Channel Operation	p. 68
Priorities	p. 70
Peripheral Support Library Functions for DMA	p. 70
Instructions for the Experiment of Generating Sine Waves by Using the DMA Controller	p. 71
Digital Filters	p. 75
Discrete-Time Convolution and Frequency Responses	p. 75
Finite Duration Impulse Response (FIR) Filters	p. 76
Block Diagram for Most Common Realization	p. 76
Two Methods for Finding the Filter Coefficients to Achieve a Desired Frequency Response	p. 77
Using Circular Buffers to Implement FIR Filters in C	p. 80
Circular Buffers Using the 'C6000 Hardware	p. 82
How the Circular Buffer is Implemented	p. 83
Indirect Addressing Through Registers	p. 83
Interfacing C and Assembly Functions	p. 84
Responsibilities of the Calling and Called Function	p. 84
Using Assembly Functions with C	p. 86
Linear Assembly Code and the Assembly Optimizer	p. 87
A Linear Assembly Convolution Function that Uses a Circular Buffer and Can be Called from C	p. 88
Infinite Duration Impulse Response (IIR) Filters	p. 96
Realizations for IIR Filters	p. 96
A Program for Designing IIR Filters	p. 100
Two Methods for Measuring a Phase Response	p. 102
Laboratory Experiments for Digital Filters	p. 103
Laboratory Experiments for FIR Filters Entirely in C	p. 103
Laboratory Experiments for FIR Filters Using C and Assembly	p. 105
Laboratory Experiments for IIR Filters	p. 105
Additional References	p. 106
The FFT and Power Spectrum Estimation	p. 109
The Discrete-Time Fourier Transform	p. 109
Data Window Functions	p. 110
The Discrete Fourier Transform and its Inverse	p. 111
The Fast Fourier Transform	p. 111
Using the FFT to Estimate a Power Spectrum	p. 119
Laboratory Experiments	p. 120
FFT Experiments	p. 120
Experiments for Power Spectrum Estimation	p. 121
Additional References	p. 124
Amplitude Modulation	p. 125
Theoretical Description of Amplitude Modulation	p. 125
Mathematical Formula for an AM Signal	p. 125
Example for Single Tone Modulation	p. 126
The Spectrum of an AM Signal	p. 127
Demodulating an AM Signal by Envelope Detection	p. 127
Square-Law Demodulation of AM Signals	p. 128
Hilbert Transforms and the Complex Envelope	p. 129
Laboratory Experiments for AM Modulation and Demodulation	p. 131
Making an AM Modulator	p. 132
How to Capture EVM Output Samples with CCS for Plotting	p. 133
Making a Square-Law Envelope Detector	p. 134
Making an Envelope Detector Using the Hilbert Transform	p. 135
Additional References	p. 136
DSBSC Amplitude Modulation and Coherent Detection	p. 137
Mathematical Form for a DSBSC-AM Signal	p. 137
The Ideal Coherent Receiver	p. 138
The Costas Loop as a Practical Approach to Coherent Demodulation	p. 140
Exercises and Experiments for the Costas Loop	p. 142
Theoretical Design Exercises	p. 143
Hardware Experiments	p. 144
Additional References	p. 145
Single-Sideband Modulation and Frequency Translation	p. 147
Single-Sideband Modulators	p. 147
Coherent Demodulation of SSB Signals	p. 149
Frequency Translation	p. 150
Laboratory Experiments	p. 151
Making an SSB Modulator	p. 152
Coherent Demodulation of an SSB Signal	p. 152
Additional References	p. 154
Frequency Modulation	p. 155
The FM Signal and Some of its Properties	p. 155
Definition of Instantaneous Frequency and the FM Signal	p. 155
Single Tone FM Modulation	p. 156
Narrow Band FM Modulation	p. 157
The Bandwidth of an FM Signal	p. 158
FM Demodulation by a Frequency Discriminator	p. 158
An FM Discriminator Using the Pre-Envelope	p. 159
A Discriminator Using the Complex Envelope	p. 160
Using a Phase-Locked Loop for FM Demodulation	p. 161
Laboratory Experiments for Frequency Modulation	p. 164
Experimentally Measuring the Spectrum of an FM Signal	p. 164
FM Demodulation Using a Frequency Discriminator	p. 165
Using a Phase-Locked Loop for FM Demodulation	p. 165
Additional References	p. 166
Pseudo-Random Binary Sequences and Data Scramblers	p. 167
Using Shift Registers to Generate Pseudo-Random Binary Sequences	p. 168
The Linear Feedback Shift Register Sequence Generator	p. 168
The Connection Polynomial and Sequence Period	p. 169
Properties of Maximal Length Sequences	p. 170
Self Synchronizing Data Scramblers	p. 171
The Scrambler	p. 171
The Descrambler	p. 172
Theoretical and Simulation Exercises	p. 173
Exercises for a Shift Register Sequence Generator with a Primitive Connection Polynomial	p. 173
Exercises for a Shift Register Sequence Generator with an Irreducible but not Primitive Connection Polynomial	p. 174
Exercises for a Shift Register Sequence Generator with a Reducible Connection Polynomial	p. 174
Additional References	p. 175
The RS-232C Protocol and a Bit-Error Rate Tester	p. 177
The EIA RS-232C Serial Interface Protocol	p. 177
Error Rate for Binary Signaling on the Gaussian Noise Channel	p. 179
The Navtel Datatest 3 Bit Error Rate Tester	p. 181
Bit-Error Rate Test Experiment	p. 181
Additional References	p. 186
Digital Data Transmission by Pulse Amplitude Modulation	p. 187
Description of a Baseband Pulse Amplitude Modulation System	p. 187
Baseband Shaping and Intersymbol Interference	p. 190
The Nyquist Criterion for No ISI	p. 190
Raised Cosine Baseband Shaping Filters	p. 191
Splitting the Shaping Between the Transmit and Receive Filters	p. 192
Eye Diagrams	p. 192
Implementing the Transmit Filter by an Interpolation Filter Bank	p. 194
Symbol Error Probability with Additive Gaussian Noise	p. 194
Symbol Clock Recovery	p. 196
Simulation and Theoretical Exercises for PAM	p. 198
Generating Four-Level Pseudo-Random PAM Symbols	p. 198
Eye Diagram for a PAM Signal Using a Raised Cosine Shaping Filter	p. 199
Eye Diagram for a PAM Signal Using a Square-Root of Raised Cosine Shaping Filter	p. 199
Theoretical Error Probability for a PAM System	p. 200
Hardware Exercises for PAM	p. 200
Generating a PAM Signal and Eye Diagram	p. 200
Testing the Square-Law Symbol Clock Frequency Generator	p. 201
Optional Team Exercise	p. 202
Additional References	p. 203
Variable Phase Interpolation	p. 205
Continuously Variable Phase Interpolation	p. 205
Computing the Least-Squares Fits	p. 208
Quantized Variable Phase Interpolation	p. 208
Closing the Tracking Loop	p. 209
Changing the Sampling Rate by a Rational Factor	p. 211
Experiments for Variable Phase Interpolation	p. 213
Open Loop Phase Shifting Experiments	p. 213
Making a Symbol Clock Tracking Loop	p. 213
Additional References	p. 214
Fundamentals of Quadrature Amplitude Modulation	p. 215
A Basic QAM Transmitter	p. 215
Two Constellation Examples	p. 218
The 4x4 16-Point Constellation	p. 218
A 4-Point Four Phase Constellation	p. 221
A Modulator Structure Using Passband Shaping Filters	p. 221
Ideal QAM Demodulation	p. 223
QAM Modulator Experiments	p. 224
Steps to Follow in Making a Transmitter	p. 225
Testing Your Transmitter	p. 226
Optional Exercise - Testing Your Transmitter by Sending to a Commercial Modem	p. 227
Additional References	p. 230
QAM Receiver I - Clock Recovery and Other Front-End Subsystems	p. 231
Overview of a QAM Receiver	p. 231
Details About the Receiver Front-End Subsystems	p. 233
Automatic Gain Control	p. 233
The Carrier Detect Subsystem	p. 234
Symbol Clock Recovery	p. 234
Experiments for the QAM Receiver Front-End	p. 241
Additional References	p. 242
QAM Receiver II - Equalizer and Carrier Recovery System	p. 243
The Complex Cross-Coupled Passband Adaptive Equalizer	p. 243
The LMS Method for Adjusting the Equalizer Tap Values	p. 244
Theoretical Behavior of the LMS Algorithm	p. 249
Adding Tap Leakage to the LMS Algorithm	p. 250
The Phase-Splitting Fractionally Spaced Equalizer	p. 251
Decision Directed Carrier Tracking	p. 253
Blind Equalization	p. 255
Blind Equalization with the Complex Cross-Coupled Equalizer	p. 256
Blind Equalization with the Phase-Splitting Equalizer	p. 257
Complex Cross-Coupled Equalizer and Carrier Tracking Experiments	p. 258
Implementing the Slicer	p. 258
Making a Demodulator and Carrier Tracking Loop	p. 260
Making a Complex Cross-Coupled Adaptive Equalizer	p. 261
Bit-Error Rate Test	p. 261
Optional Experiment - Receiving the 16-Point V.22bis Constellation	p. 261
Optional Experiment - Ideal Reference Training	p. 262
Optional Phase-Splitting Fractionally Spaced Equalizer Experiment	p. 262
Optional Blind Equalization Experiment	p. 263
Additional References	p. 264
Echo Cancellation for Full-Duplex Modems	p. 265
The Echo Sources in a Dialed Telephone Line Circuit	p. 265
The Data-Driven, Nyquist, In-Band Echo Canceler	p. 267
General Description	p. 267
The Near-End Echo Canceler	p. 269
The Far-End Echo Canceler	p. 271
Far-End Frequency Offset Compensation	p. 272
Echo Canceler Experiments	p. 273
Making a Near-End Echo Canceler	p. 273
Making a Far-End Echo Canceler with Frequency Offset Correction	p. 273
Additional References	p. 274
Suggestions for Additional Experiments	p. 275
Elementary Modem Handshake Sequence	p. 275
Make an ITU-T V.21 Frequency Shift Keyed (FSK) Modem	p. 275
Fast Equalizer Training Using Periodic Sequences	p. 276
Trellis Coded Modulation	p. 277
V.34 Constellation Shaping by Shell Mapping	p. 277
Nonlinear Precoding for V.34	p. 278
Multi-Tone Modulation for ADSL and Wireless Systems	p. 278
Speech Codecs	p. 278
Generating Gaussian Random Numbers	p. 279
A TTL/RS-232C Interface for McBSP1	p. 281
Equipment List for Each Station	p. 283
References	p. 285
List of Manuals	p. 285
Selected Reference Books and Papers	p. 286
DSP Laboratory Books Using DSP Hardware	p. 286
DSP Laboratory Books Using Software Simulation	p. 286
Books and Papers on Digital Signal Processing	p. 287
Books and Papers on Communications	p. 288
Books and Papers on Error Correcting Codes	p. 291
Interesting Web Sites	p. 292
Index	p. 293
Table of Contents provided by Ingram. All Rights Reserved.

Communication System Design Using DSP Algorithms : With Laboratory Experiments for the TMS320C6701 and TMS320C6711

With Laboratory Experiments for the TMS320C6701 and TMS320C6711

At a Glance

Paperback

Shipping

How to return your order

Defective items

You Can Find This Book In

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