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PIER PIER B PIER C PIER M PIER Letters
2013-02-14
A Novel, High-Speed Image Transmitter for Wireless Capsule Endoscopy
By
Md. Rubel Basar,

    Dr. Md. Rubel Basar

    School of Computer and Communication Engineering

    University Malaysia Perlis (UniMAP)

    Malaysia

    Homepage

Mohd Fareq Bin Abd Malek,

    Dr. Mohd Fareq Bin Abd Malek

    School of Computer and Communication Engineering

    Universiti Malaysia Perlis (UniMAP)

    Malaysia

    Homepage

Mohd Iskandar Mohd Saleh,

    Dr. Mohd Iskandar Mohd Saleh

    Electrical Engineering Department

    Politeknik Tuanku Syed Sirajuddin

    Malaysia

    Homepage

Mohd Shaharom Idris,

    Dr. Mohd Shaharom Idris

    Electrical Engineering Department

    Politeknik Tuanku Syed Sirajuddin

    Malaysia

    Homepage

Khairudi Mohd Juni,

    Dr. Khairudi Mohd Juni

    Electrical Engineering Department

    Politeknik Tuanku Syed Sirajuddin

    Malaysia

    Homepage

Azuwa Ali,

    Mrs. Azuwa Ali

    School of Electrical Systems Engineering

    Universiti Malaysia Perlis (UniMAP)

    Malaysia

    Homepage

Nur Adyani Mohd Affendi,

    Dr. Nur Adyani Mohd Affendi

    School of Electrical Systems Engineering

    Universiti Malaysia Perlis (UniMAP)

    Malaysia

    Homepage

Nuriziani Hussin

    Dr. Nuriziani Hussin

    School of Electical System Engineering

    Universiti Malaysia Perlis

    Malaysia

    Homepage

Progress In Electromagnetics Research, Vol. 137, 129-147, 2013
doi:10.2528/PIER13011102
Abstract
Wireless capsule endoscopy (WCE) was developed as a painless diagnostic tool for endoscopic examination of the gastrointestinal (GI) tract, but, to date, the low operating power of the capsule and the high data rate of the RF telemetry system are still key concerns. Innovative, novel solutions must be developed to address these concerns before WCE can be used extensively in clinical applications. In this paper, we propose a novel RF transmitter for WCE applications that only requires 1.5 V to transmit the required data as opposed to using a DC power supply. Our proposed, direct-conversion transmitter system consists of a current reuse oscillator, an envelope filter, and an L-section matching network. The oscillator is powered by the transmitting data which keep the oscillator in turned on and off for the transmitting 1 and 0 bit respectively and results in the on-off keying (OOK) of the modulated signal at the output of the oscillator. The rate of data transmission at the modulated signal is limited by the transient period of the oscillator start-up. When the start-up time of the oscillator is optimized, an OOK modulation rate of 100 Mb/s can be attained. In order to eliminate the oscillator decay noise, we used an envelope filter connected in series with the oscillator to filter out the decay part of the oscillation. Finally, the output impedance of the envelope filter is matched to the 50-Ω antenna with an L-section, low-pass, matching network to ensure maximum power transmission. The entire transmitter system was simulated in a 0.18-μm Complementary metal-oxide-semiconductor (CMOS) process.
Citation
Md. Rubel Basar, Mohd Fareq Bin Abd Malek, Mohd Iskandar Mohd Saleh, Mohd Shaharom Idris, Khairudi Mohd Juni, Azuwa Ali, Nur Adyani Mohd Affendi, and Nuriziani Hussin, "A Novel, High-Speed Image Transmitter for Wireless Capsule Endoscopy," Progress In Electromagnetics Research, Vol. 137, 129-147, 2013.
doi:10.2528/PIER13011102
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