A Design of a High-Speed and High-Efficiency Capsule Endoscopy System

被引:38
|
作者
Kim, Kihyun [1 ,2 ]
Yun, Sumin [1 ,2 ]
Lee, Sungho [3 ]
Nam, Sangwook [2 ]
Yoon, Young Joong [4 ]
Cheon, Changyul [5 ]
机构
[1] Seoul Natl Univ, Appl Electromagnet Lab, Sch Elect Engn, Seoul 151742, South Korea
[2] Seoul Natl Univ, Inst New Media & Commun, Seoul 151742, South Korea
[3] KETI, Gyeonggi 463816, South Korea
[4] Yonsei Univ, Microwave & Antenna Lab, Sch Elect Engn, Seoul 120749, South Korea
[5] Univ Seoul, Dept Elect & Comp Engn, Seoul 130743, South Korea
关键词
Automatic gain controller (AGC); CMOS radio frequency (RF) integrated circuit; ON-OFF Keying (OOK) modulator/demodulator; wireless body area network; ANALOG FRONT-END; WIRELESS; TRANSCEIVER; ANTENNA;
D O I
10.1109/TBME.2011.2182050
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
This paper presents a high-speed and high-efficiency capsule endoscopy system. Both a transmitter and a receiver were optimized for its application through an analysis of the human body channel. ON-OFF keying modulation is utilized to achieve low power consumption of the in-body transmitter. A low drop output regulator is adopted to prevent performance degradation in the event of a voltage drop in the battery. The receiver adopts superheterodyne structure to obtain high sensitivity, considering the link budget from the previous analysis. The receiver and transmitter were fabricated using the CMOS 0.13-mu m process. The output power of the transmitter is -1.6 dB.m and its efficiency is 27.7%. The minimum sensitivity of the receiver is -80 dB.m at a bit error ratio (BER) of 3 x 10(-6). An outer wall loop antenna is adopted for the capsule system to ensure a small size. The integrated system is evaluated using a liquid human phantom and a living pig, resulting in clean captured images.
引用
收藏
页码:1005 / 1011
页数:7
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