Print Email Facebook Twitter Passive Wireless ECoG Monitoring On Multiple Subjects Title Passive Wireless ECoG Monitoring On Multiple Subjects Author Liu, Minghui (TU Delft Electrical Engineering, Mathematics and Computer Science) Contributor Serdijn, Wouter (mentor) Degree granting institution Delft University of Technology Date 2018-03-26 Abstract The neuroscience department of the Erasmus Medical Centre (EMC) has been working for many years to analyse the epilepsy and the treatments. It is a part of the neuro research in the collaborations between the Erasmus Medical Centre (EMC) neuroscience department and the section Bioelectronics at Delft University of Technology. The system is firstly tested by using discrete components and simulated, then the electronics schematic has been design and assembled. The approach for this wireless link system is using Frequency Division Multiple Access (FDMA) and Amplitude shift keying (ASK) modulation by backscattering method. Besides, the MCU is also used to generate the subcarriers for tests.In this work, a system level design for a wireless, multi-subject ElectroCorticoGram (ECoG) monitoring system for epilepsy research on mice is further optimized. The 915 MHz ISM band range is chosen and designed, where the GSM interference is detected and filtered out in the receiver. In this project, the receiver for downlink is further designed, which contains antennas, filters, oscillators and other commercial components. In uplink design, the MCU generates the subcarrier frequency and then this subcarrier is modulated on the main 915 MHz carrier by means of on-off-keying technique. The block prototype of the system is also simulated and tested to evaluate the general wireless link.In this wireless system, up to 3 objects can be simultaneously detected by using different subcarrier frequencies by designed analog receiver. The system experiments indicate different performance in terms of the power, interference and noise. According to these records, a schematic design with custom components guarantees the real time monitoring for multiple objects. The PCB design is completed including the power supply, transmitter and receiver. The receiver design is suitable for the scenario at 500 Hz sampling frequency of the ECoG signal and data bitrate below 100 KHz, with the demodulation of the subcarrier frequencies at 1.6 MHz, 2.6 MHz and 4 MHz. To reference this document use: http://resolver.tudelft.nl/uuid:61b67578-6009-4538-858a-70302fe7fc68 Part of collection Student theses Document type master thesis Rights © 2018 Minghui Liu Files PDF Passive_Wireless_ECoG_Mon ... bjects.pdf 3.76 MB Close viewer /islandora/object/uuid:61b67578-6009-4538-858a-70302fe7fc68/datastream/OBJ/view