THEORY OF COMMUNICATION AND DATA TRANSMISSION
Obligatory course.
| week | topic |
| 1 | Analog and digital signals and systems for communication. Properties in the time and frequency domains. |
| 2 | Basic building blocks of communication and data transmission. Shannon’s conception. Multiple access. |
| 3 | Theory of modulation. Survey of modulation techniques. Amplitude modulation. |
| 4 | Modulators and demodulators AM. |
| 5 | Frequency modulation – classical and narrow-band. Phase modulation |
| 6 | Modulators and demodulators FM and PM. |
| 7 | Pulse modulations: PAM, PDM, PPM. |
| 8 | Shift keying techniques: ASK, FSK, FFSK, PSK, BPSK, MQAM, MSK. |
| 9 | Convolution coding. Vitterbi decoding. Shift keying and coding, Trellis keying. |
| 10 | Introduction to the digital representation of analog signals. |
| 11 | Sampling, quantization, sampling theorem, aliasing. PCM, delta modulation. |
| 12 | Adaptive delta modulation, sigma-delta modulation (predictive and noise shaping systems). |
| 13 | Base-band data transmission. Link codes. Theory of the optimum receivers. Matched filter. |
| 1 | Basic terms and their relations. Information, message, signal, system. |
| 2 | Signal classification with a view to the communication and data transmission. Continuous-time and discrete-time, continuous-and discrete-value signals. Analog and digital signals. Spectral representation of periodical signals –recap. Digital data representation. |
| 3 | System classification with a view to the communication and data transmission. Typical linear, nonlinear, analog and digital blocks. System properties and parameters of analog and digital blocks (linear and nonlinear distortion, frequency responses, time-domain behavior, noise, transmission and modulation rate, BER). |
| 4 | Shannon conception of transmission channel. Direct and feedback systems. ARQ, FEC. |
| 5 | Modulation techniques, their classification. Classical modulations with harmonic carrier – AM, FM, PM. DSB, SSB, DSB-SC, SSB-SC, typical applications. Time- and spectral representation. Modulation index. Bandwidth, power relations. Circuit principles of modulators and demodulators. Angular modulations FM and PM. Frequency and phase shift, FM index, PM index. Spectrum while considering harmonic modulating signal. Ten-percent and one-percent bandwidth. Carson’s estimations. Connection between the FM and PM. Narrow-band modulation. Power relations. Circuit principles of modulators and demodulators. |
| 6 | Shift keying. Two-stage ASK, FSK, FFSK, PSK, BPSK, DPSK. Multistage QPSK, OK-QPSK, MQAM. MSK, GMSK. Principles, features in the time and spectral domains, principles of modulators and demodulators, typical utilizations. Trellis shift keying: principle, convolution coding, Vitterbi decoder. |
| 7 | Pulse analog modulations. PAM I, PAM II, PDM, PPM. Features, demodulation methods. |
| 8 | Introduction to the digital modulations – general block scheme of digital modulator. Sampling and quantization – Nyquist’s condition, quantization noise as a random process, signal/quant. noise ratio, dynamics of A/D conversion, linear and nonlinear quantization. |
| 9 | PCM modulation – principle, features. Time-domain multiplexing, PCM transmission rate. DPCM – principle. Delta modulation. Principle, features comparing to PCM. Coder overloading. Adaptive delta modulation – principle of Winkler algorithm. Sigma-delta predictive and noise-shaping modulators – principles, features comparison. Oversampling. |
| 10 | Multiple access. TDMA, FDMA, CDMA, SSMA - principles, utilization examples. |
| 11 | Base-band transmission of digital data. Synchronous, asynchronous and start-stop transmission. Basic requirements on bandwidth, keeping synchronization, problem of DC component. Signal element. Unipolar and bipolar NRZ and RZ signals, features. Scramblers. Link codes, multistage data. AMI, SPC, HDB3, nBmT codes – principles. |
| 12 | Base-band noise. Characteristics of Gaussian noise – behavior in the time domain, statistical properties. Probability density and distribution function. Working with the table of Laplace integral. Computation of the probability of error of receive binary data. Cross-talks. Strategy of eliminating cross-talks and noise influence. Scheme of the block of data regeneration. Eye pattern. Method of repeated receiving. Method of matched filtering – definition of the matched filter and its operation. |
Student can gain (0 - 100) points, from that:
up to 15 points per 1 test
up to 15 points per individual activity,
up to 70 points per exam (only in written form).
Points are converted to grade according to the table:
| points | 0-49 | 50-69 | 70-89 | 90-100 |
| grade | 4 | 3 | 2 | 1 |
References and recommended books
HSU, H.P.-HSE,H.P.: Schaum's Outline of Signals and Systems. McGraw-Hill, 1995. ISBN 0070306419.
HSU, H.P.: Schaum's Outline of Theory and Problems of Analog and Digital Communications. McGraw-Hill, 1993. ISBN 0070306362.
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| Lectures and exerc.: | Prof. Ing. Dalibor Biolek, CSc. | ÚMEL | 307 | 973442487 | dalibor.biolek@vabo.cz |
