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Transimpedance amplifiers (TIAs) play a pivotal role in the optical wireless receiver front end. To exploit its distinctive open-loop characteristics, a feedback transimpedance amplifier comprising a feedforward current amplifier (CA-TIA) is investigated. Attributing to the small input impedance with a high-pass response of its feedforward gain element, the bandwidth of the CA-TIA is less sensitive...
This paper presents a wireless relay scheme for indoor healthcare communication system, in which an optical relay link, instead of a traditional radio frequency (RF) relay link, is established between the relay station (RS) and the mobile terminal (MT). To simplify the structures of RS and the additional optical parts that shall be installed in the MT, the subcarrier-modulation based intensity-modulated...
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