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Download or read book An Energy-efficient Impulse Radio Ultra Wideband (IR-UWB) Transceiver for High-rate Biotelemetry written by Ali Ebrazeh and published by . This book was released on 2015 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project has developed an energy-efficient, high data-rate, impulse radio ultra wideband (IR-UWB) transceiver, operating in three channels within 3-5 GHz for centimeter-to-meter range biotelemetry. Fabricated in 90 nm 1P/9M CMOS, the transceiver integrates an all-digital transmitter with a waveform-synthesis pulse generator and a timing generator for pulse modulation and phase scrambling that, as well as a noncoherent receiver with front-end RF amplification/filtering, self-correlation for energy detection and digital synchronization of the baseband clock and data. The transmitter provides great flexibility in reconfiguring the UWB pulse waveform in the time domain (e.g., overall shape, amplitude, duration) as well as its power spectral density (PSD) in the frequency domain (e.g., center frequency, bandwidth, peak level). A fully integrated receiver would also significantly reduce its power consumption as compared to that of a discrete implementation, addressing another limitation for true portability of the centimeter-range transceiver and greatly enhancing energy efficiency per received bit in the wireless link. The receiver RF front-end can provide up to 37 dB of gain with adjustable bandwidth, sharp roll-off and tunable center frequency at 3.5, 4 and 4.5 GHz for channel selection and robustness against out-of-band noise/interference.Employing a miniaturized, UWB, chip antenna for the transmitter and receiver, wireless transmission of pseudo-random binary sequence (PRBS) data at rates up to 75 Mb/s over 10 cm-1 m is shown for portable application. Further, employing a high gain horn antenna for the receiver, wireless transmission of PRBS data at rates up to 125 Mb/s over 50 cm-4 m is shown for stationary application with transmitter and receiver energy consumption of 14 pJ/pulse and 0.15 nJ/b, respectively, from 1.2 V. To address the problem of data rate in high-channel-count neurochemical monitoring, we demonstrated proof-of-concept feasibility of utilizing IR-UWB signaling technique for wireless transmission of dopamine concentrations levels recorded by fast-scan cyclic voltammetry (FSCV) at a carbon-fiber microelectrode (CFM), and compares the results with those obtained by using a conventional frequency-shift-keyed (FSK) transceiver as the uplink.