Dynamic interference analysis for TV white spaces in Thailand | |
| Author | Prathana Thaopanya |
| Call Number | AIT RSPR no.ICT-22-02 |
| Subject(s) | Television frequency allocation--Thailand Radio resource management (Wireless communications)--Thailand Cognitive radio networks--Thailand Long-Term Evolution (Telecommunications)--Thailand |
| Note | A research submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Information and Communication Technologies, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | In this work, we propose a dynamic interference method for optimizing TV white space utilization, to minimize the interference and increase the spectrum usage. This method uses the protection ratio concept to design the algorithm to protect a TV receiver from LTE interference. The coexistence of LTE on a digital television channel is studied in three cases: the co-channel, the upper and lower adjacent channel. Under this study condition, TV receivers for terrestrial reception in Thailand receive a signal which is an 8MHz bandwidth for one carrier frequency following the DVB-T2 standard. Also, we assume a 5MHz bandwidth spectrum as LTE interference. A radio frequency (RF) attenuator and a Raspberry Pi board are used to create the adaptive interference controller. The testbed hardware and the quality of experience (QoE) assessment are used to show the effectiveness of the method compared to using without an algorithm. For the testbed hardware, a Log Periodic antenna is used for digital television (DTV) receiving, a RF transmitter is used for a 5MHz bandwidth generating, an ultra-high frequency (UHF) mixer is used to combine both signals, and a field strength meter is used to monitor video content and to analyze spectrum. For QoE assessment, threshold of visibility (TOV) method is used for observing video distortion on screen. Our method can reduce the perceived video distortion to a TV receiver by at least 62.5% for co channel, 87.5% for adjacent channels, while the spectrum usage is increased by 100% in case study. |
| Year | 2022 |
| Type | Research Study Project Report (RSPR) |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Information and Communication Technology (ICT) |
| Chairperson(s) | Teerapat Sanguankotchakorn |
| Examination Committee(s) | Poompat Saengudomlert;Attaphongse Taparugssanagorn |
| Scholarship Donor(s) | Royal Thai Government Fellowship |
| Degree | Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 2022 |