Norman M. Filiol

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A technique of spread-spectrum transmission, interpolated frequency-hopping (IFH), is presented. IFH employs a carrier that moves smoothly and continuously in frequency, helping to alleviate problems, such as spectral splatter and transient mismatch, which are a concern in conventional phase-locked loop (PLL)-based frequency-hopping spread-spectrum systems.(More)
By manipulating digital tools to include a single analog cell, the complete DAC and IF transmit path of a radio is automatically placed and routed in 0.12 mm<sup>2</sup>. Implemented in 0.18 mum CMOS, an over-sampled SigmaDelta modulator quantizes the data stream and a semi-analog filter selects a replica of the desired signal at IF. Based on instances of a(More)
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