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A Software-Defined Radio Receiver for Wireless Recording from Freely-Behaving Animals

Title
A Software-Defined Radio Receiver for Wireless Recording from Freely-Behaving Animals
Author
이병훈
Keywords
Electrophysiology; implantable medical devices; neural interfacing; software-defined radio; wireless; Wireless communication; Animals; Radio frequency; Wireless sensor networks; RF signals; Graphical user interfaces; Data acquisition
Issue Date
2019-10
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS, v. 13, no. 6, page. 1645-1654
Abstract
To eliminate tethering effects on the small animals' behavior during electrophysiology experiments, such as neural interfacing, a robust and wideband wireless data link is needed for communicating with the implanted sensing elements without blind spots. We present a software-defined radio (SDR) based scalable data acquisition system, which can be programmed to provide coverage over standard-sized or customized experimental arenas. The incoming RF signal with the highest power among SDRs is selected in real-time to prevent data loss in the presence of spatial and angular misalignments between the transmitter (Tx) and receiver (Rx) antennas. A 32-channel wireless neural recording system-on-a-chip (SoC), known as WINeRS-8, is embedded in a headstage and transmits digitalized raw neural signals, which are sampled at 25 kHz/ch, at 9 Mbps via on-off keying (OOK) of a 434 MHz RF carrier. Measurement results show that the dual-SDR Rx system reduces the packet loss down to 0.12, on average, by eliminating the blind spots caused by the moving Tx directionality. The system operation is verified in vivo on a freely behaving rat and compared with a commercial hardwired system.
URI
https://ieeexplore.ieee.org/document/8882385https://repository.hanyang.ac.kr/handle/20.500.11754/160814
ISSN
1932-4545; 1940-9990
DOI
10.1109/TBCAS.2019.2949233
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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