Course detail
Implementation of Software Communication Systems
FEKT-MIKSAcad. year: 2018/2019
The course is oriented to the real implementation problems of radio transmitters and receivers of single- and multi-carrier communication signals. Its emphasis is on both the theoretical description of basic algorithms for communication signals processing (sample rate change, filtration, synchronization, equalization, etc.), as well as on their practical software implementation with the use of available hardware (fixed-point arithmetic, analysis of signal transmitted from front-end, etc.). During the laboratories, students will get hands-on experience with the implementation of various transceiver algorithms using widely available (USB-RTL SDR) as well as higher performance (e.g. USRP) software defined radios or universal boards with FPGA and AD/DA converters.
Language of instruction
Number of ECTS credits
Mode of study
Guarantor
Department
Learning outcomes of the course unit
- convert the real numbers into fixed-point format and back
- create a program for FPGA that implements the basic blocks of software defined transmitter with single and multiple carriers
- create a MATLAB program able to demodulate QAM/QPSK/OFDM signal received using software defined receiver (USB-RTL, USRP), including synchronization and simple channel equalization
- discuss the need and the solutions for sample rate change of signals incommunication transceivers
- explain the principle of CORDIC algorithm and its application in radio transceivers
Prerequisites
- compose a simple program in MATLAB environment
- synthesize simple FIR filter (low-pass, high-pass, raised cosine)
- mathematically describe signals of basic digital modulations (PSK, QAM, OFDM)
- discuss the basic terminology of signal processing
- discuss the advantages and disadvantages of basic communication technologies
Co-requisites
Planned learning activities and teaching methods
Assesment methods and criteria linked to learning outcomes
up to 70 points for exam (written 50 points + oral part 20 points)
The final exam consists of compulsory written and optional oral part. In order to procced for oral part, student has to get at least 20 points in the written part
Course curriculum
1. Architectures of transmitters and receivers, sub-band sampling, concept of software and software-defined radio
2. Number representation, fixed-point arithmetic, CORDIC algorithm
3. Hardware and software resources for implementation of communication systems
4. Metrics to evaluate communication signals quality - EVM, ACPR, vector analysis
5. Integer resampling - interpolation and decimation
6. Fractional resampling, Farrow interpolator
7. Digital filters and their effective FPGA implementation, FIR and CIC filters
8. Basic building blocks of digital transceivers - DDS, mixers, methods of FM signal demodulation
9. Algorithms for time and frequency synchronization of single-carrier and multi-carrier (OFDM) signals, carrier synchronization
10. Equalization of communication signals
11. Effective implementation of DFT - radix 2/4, DIT/DIF, mixed/split-radix FFT
12. Adaptive methods in communication systems, dynamic spectrum allocation
13. QR decomposition and its application in communication systems
Computer lab in-class excercises:
1.-3. Fixed-point arithmetic, VHDL implementation of QAM modulator
4.-6. CORDIC algorithm, implementation of FM demodulator
7.-9. OFDM modem, simulation and implementation of full transceiver
10.-11. FSK modem in MATLAB environment
12.-13. Passive multistatic reception, TDOA method
Work placements
Aims
Specification of controlled education, way of implementation and compensation for absences
Recommended optional programme components
Prerequisites and corequisites
Basic literature
Recommended reading
Classification of course in study plans
Type of course unit
Lecture
Teacher / Lecturer
Syllabus
2. Number representation, fixed-point arithmetic, CORDIC algorithm
3. Hardware and software resources for implementation of communication systems
4. Metrics to evaluate communication signals quality - EVM, ACPR, vector analysis
5. Integer resampling - interpolation and decimation
6. Fractional resampling, Farrow interpolator
7. Digital filters and their effective FPGA implementation, FIR and CIC filters
8. Basic building blocks of digital transceivers - DDS, mixers, methods of FM signal demodulation
9. Algorithms for time and frequency synchronization of single-carrier and multi-carrier (OFDM) signals, carrier synchronization
10. Equalization of communication signals
11. Effective implementation of DFT - radix 2/4, DIT/DIF, mixed/split-radix FFT
12. Adaptive methods in communication systems, dynamic spectrum allocation
13. QR decomposition and its application in communication systems
Exercise in computer lab
Teacher / Lecturer
Syllabus
4.-6. CORDIC algorithm, implementation of FM demodulator
7.-9. OFDM modem, simulation and implementation of full transceiver
10.-11. FSK modem in MATLAB environment
12.-13. Passive multistatic reception, TDOA method