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This paper presents a receiver front-end circuit for wideband high-frequency ultrasound transducer applications. The front end consists of three main blocks, a low noise amplifier (LNA), a variable gain amplifier (VGA) and a biquad low pass filter (LPF). The receiver is specifically designed for polyvinylidene fluoride (PVDF) transducer imaging with a typical signal bandwidth of 10–60 MHz. To achieve...
In a large scale networked virtual environment, users may request various multimedia data in streaming. Although adopting a peer-to-peer (P2P) architecture can make the transmission of on-demand streaming more efficient, most existing research assume that the peers have infinite buffer to cache the entire content and supply the data from there. In this paper, we consider the practical case in which...
Multiple Input Multiple Output (MIMO) radar is a new radar technique, which transmits orthogonal signal at the transmitter and forms wide beam. In this paper, we select the orthogonal frequency division multi LFM signal as the orthogonal waveform. In this model, the bandwidth of single LFM and the frequency interval are important. Only the situation of equi-interval frequency is studied here. Assume...
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