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Integration of System Design and Standard Development in Digital Communication Education

Integration of System Design and Standard Development in Digital Communication Education. Xiaohua(Edward) Li State University of New York at Binghamton. Contents. Introduction SAM project in digital communications Technical standard of SAM Conclusions. Introduction.

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Integration of System Design and Standard Development in Digital Communication Education

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  1. Integration of System Design and Standard Development in Digital Communication Education Xiaohua(Edward) Li State University of New York at Binghamton

  2. Contents • Introduction • SAM project in digital communications • Technical standard of SAM • Conclusions

  3. Introduction • Digital communications education should • teach theory with a systematic view • use MATLAB projects to strengthen the systematic view • develop practical system design experience • Traditional ways of teaching may not perform well enough

  4. Introduction • Our approach: joint theory, system design and technical standard drafting • Objectives: • Integrate theory with hands-on experience • Cost effective: computers only • Convenient: Matlab programming only • Competitive: drafting standards

  5. Design of the SAM Project • SAM: soft acoustic modem • a modem with PC and MATLAB • Overview: • Phase 1: baseband transmission • Phase 2: passband transmission (wireline) • Phase 3: passband with coding (wireless) • Modem standard discussion and draft • Work of students • demonstration, presentation, standard draft

  6. The SAM Project (1) • Phase I. Baseband system design • Theory: data packet, pulse shaping, synchronizations • Hardware: one PC • Software: MATLAB

  7. The SAM Project (2) • Phase II. Passband wired transmission • Theory: modulation/demodulation, synchronization • Hardware: one or two PC • Software: MATLAB

  8. The SAM Project (3) • Phase III. Wireless modem • Theory: wireless, SNR, channel coding/decoding • Hardware: two PCs

  9. The SAM (4). Software: MATLAB

  10. Format message with Barker and Training Sequence Start Transmitter Generate random message Convolutional encode message Differentially encode entire signal Modulate signal with 1 kHz carrier Pulse shape entire signal Transmit Sample for 1 kHz carrier Record Waveform upon detection of 1 kHz carrier signal Demodulate signal Differentially decode Assess Bit Error Convolutional decode Frame Synchronize using Barker Time synchronize and sample The SAM Project (5) • Typical transmitter and receiver block diagrams • Simulation results of one student group

  11. Technical Standard Activity • Technical standard • Provide design guide and inter-operability • Encourage competition • Approaches for drafting standards: • Only design objective is assigned • Students are free to choose techniques • Perform regular discussion to define common parameters • Each group draft a standard, among which the most competitive one is recommended

  12. Conclusions • Project that stimulates students’ interest • Use practical design projects which involve both software and hardware • Use tools which are under students’ control • Introduce competitions • Make it challenging by leaving questions open • Draft standards instead of writing ordinary reports

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