University of Twente Student Theses


Comparison of Short Block and Low Rate Channel Codes for UNB communication

Miclea, Stefan (2020) Comparison of Short Block and Low Rate Channel Codes for UNB communication.

[img] PDF
Abstract:Ultra Narrow Band (UNB) is one of the technologies used for Low Power Wide Area Network (LPWAN). Solutions using UNB for this type of networks encounter problems such as Carrier Frequency Offset (CFO) and time-varying fading channels [1]. An offset tolerant demodulator has been proposed as a solution to overcome the problem of carrier frequency offset. To tackle the time-varying fading channel distortion, time, or frequency diversity together with channel coding can be used. Since this solution would add extra bits to transmit and for this type of networks, saving power is the goal, a higher order modulation can be considered in order to provide the required bit-rate. Hence, a hybrid frequency/phase modulation is used with an offset tolerant demodulator to both tackle the CFO as well as providing the bit-rate which is required for time diversity and encoding. This solution is described and tested using a repetition code as the channel coding, in [1]. To further enhance the performance achieved in [1], better channel coding for this scenario should be considered, implemented, and tested. This paper will focus on implementing the Polar code in MATLAB and test it under the described scenario. Also, MATLAB objects were used to implement a BCH code, test it in the same scenario and compare the results. The results show a better performance of the Polar code in comparison with the BCH code in the final testing environment.
Item Type:Essay (Bachelor)
Faculty:EEMCS: Electrical Engineering, Mathematics and Computer Science
Programme:Electrical Engineering BSc (56953)
Link to this item:
Export this item as:BibTeX
HTML Citation
Reference Manager


Repository Staff Only: item control page