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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2013-08-01
High-Speed, Simplified Design of an Image Receiver 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

Khairudi Mohd Juni,

    Dr. Khairudi Mohd Juni

    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

Mohd Iskandar Mohd Saleh

    Dr. Mohd Iskandar Mohd Saleh

    Electrical Engineering Department

    Politeknik Tuanku Syed Sirajuddin

    Malaysia

    Homepage

Progress In Electromagnetics Research B, Vol. 53, 223-239, 2013
doi:10.2528/PIERB13052012 | Google Scholar

Abstract
Just over a decade ago, wireless capsule endoscopy (WCE) was introduced as a novel alternative to conventional wire or probe endoscopy to examine disorders of the human gastrointestinal (GI) tract. Yet, the persistent inability of transmitting high-quality images due to limited data rate of the telemetry system continues to be an issue of major concern. Thus, high-data-rate telemetry systems are essential due to the widespread use of the WCE technique. In this paper, we present such a telemetry system that includes a highly-simplified receiver for the use in WCE. Unlike the conventional architecture of a radio frequency (RF) receiver, the architecture of the new receiver allows the direct conversion of analog RF signals to digital signals, eliminating the need for any frequency conversion in the analogue domain. Our receiver system consists of sub-blocks, a low-noise amplifier (LNA), a logarithmic amplifier (LA), a power detector (PD), and a comparator. The common-source cascode LNA was designed with its frequency spectrum centralized at 450 MHz, which was determined by electromagnetic (EM) simulation of the path loss in the GI tract of the human body. To ensure that the higher data rate, i.e., 100 Mbps, could be attained, the LNA was designed for a system bandwidth of 100 MHz, i.e., 400-500 MHz. The LNA and the three cascading blocks in combination have total gain of 80 dB to compensate for the losses in the weak signals that are received. The LNA and the LA, including the PD and the comparator, require 17-mA and 337-μA currents, respectively, from a 1.5-V, DC source.
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Citation
Md. Rubel Basar, Mohd Fareq Bin Abd Malek, Khairudi Mohd Juni, Mohd Shaharom Idris, and Mohd Iskandar Mohd Saleh, "High-Speed, Simplified Design of an Image Receiver for Wireless Capsule Endoscopy," Progress In Electromagnetics Research B, Vol. 53, 223-239, 2013.
doi:10.2528/PIERB13052012
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