Syllabus of "Communication Principle Experiment"

Course name: Communication Principle Experiment
Hours: 20 Credits: 1
Applicable Major: Communication Engineering
Prerequisites: Electronic Circuits, Signals and Systems
Course nature: compulsory
1. The status and tasks of the course
This course is an experimental course matched with the course "Communication Principles", and is an important professional basic course and main course for communication engineering. Through the study of this course, students will further deepen their understanding of the basic concepts of communication principles and the grasp of basic theories on the basis of the theoretical courses of "Communication Principles". Cultivate students 'basic skills in conducting experiments on communication principles and the ability to comprehensively use the knowledge they have learned to discover, analyze, solve problems, and engineering practices, improve students' comprehensive professional qualities, and lay a solid foundation for the follow-up courses and post-graduation work.
2. Experimental content and requirements
1. Basic experiment
(1) Voice coding technology: verify PAM, PCM, ADPCM, CVSD coding and decoding principles. Master the test method of its performance.
(2) Error control technology: verify the principle of Hamming code and master the test method of its performance.
(3) Code type conversion technology: verify AMI, HDB3, CMI coding rules, and master the CMI code error detection function test method.
(4) Scrambling processing technology: master the role of scrambling technology in communication circuits.
(5) Digital multiplexing technology: verify the principle of digital multiplexing and observe the impact of frame loss on data services.
(6) Common channel transmission technologies for wireless and mobile communications: Master continuous phase FSK, BPSK, DBPSK transmission system experiments and constellation diagram observation methods, understand the realization of new modulation theory such as QPSK, DQPSK, OQPSK, MSK, GMSK, π / 4DQPSK Way to establish the basic concept of software radio.
2. System experiment
(1) Comprehensive experiment of the telephone exchange call processing communication system: master the composition of typical communication links, understand the signaling processing, signal transmission process and test methods in the telephone exchange call processing system. Grasp the measurement method of the impact of the Hamming system on the communication quality of various services under different bit error rates, and observe the impact of the Hamming codec circuit's abnormal voice service. Deepen the concept of software radio composed of FPGA + DSP platform.
(2) Time division multiplexing (TDM) communication system comprehensive experiment: master the multiplexing / demultiplexing and the frame synchronization process of the receiving end and the observation method of anti-error performance under different error codes. Observe the effect of frame synchronization and out-of-synchronization on communication.
(3) Comprehensive test of computer data transmission and communication system: Familiar with the connection method of computer and channel transmission equipment, master the basic setting and operation method of communication between two computers, and observe the impact of error code on data communication.
3. Secondary development experiment
The secondary development experiment is mainly a design experiment conducted by students under the guidance of teachers and a certain experimental environment. Its purpose is to cultivate students' sense of innovation and improve their ability to innovate comprehensively with the knowledge they have learned. The hardware platform of the communication principle experiment box should use the currently popular programmable devices CPLD, FPGA, etc. The main experimental contents are:
(1) Programmable logic device experiment: learn the concrete realization process of variable frequency divider, m-sequence generator and noise signal generator.
(2) Communication circuit experiment: Program the programmable device in the communication module to realize BPSK phase adjustment experiment and QPSK phase modulation.
(3) System experiment: learn to use programmable modules to realize the end-to-end communication process, such as multiplexing experiment, frame synchronization experiment, scrambling experiment, descrambling experiment, CMI coding and decoding experiment, etc.
(4) Signal processing experiment: learn the basic technology of using DSP chip, such as DSP signal generation experiment, DSP interruption experiment, DSP signal processing and other experiments.
3. Suggestions on experimental teaching content and time allocation
The experimental teaching content should be reasonably selected from the abundant experimental resources according to the current teaching basic requirements and the development status of communication technology under the guidance of the teaching reform policy.
Serial number
Experimental content
Class hours (hours)
1
Phase-locked loop experiment
2
2
PCM / ADPCM codec system experiment
2
3
Telephone user loop interface experiment
2
4
Continuous phase FSK modulation transmission experiment
2
5
BPSK / DBPSK transmission experiment
2
6
Hamming code experiment
2
7
Frame shaping and transmission experiment
2
8
HDB3 / CMI coding and decoding experiment
2
9
RS422 / RS232 data interface experiment
2
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