Analysis and Design of Analog Integrated Circuits
Analysis and Design of Analog Integrated Circuits
Architectures for low power ultra-wideband radio receivers in the 3.1-5GHz band for data rates
Proceedings of the 2004 international symposium on Low power electronics and design
UWB: innovative architectures enable disruptive low power wireless applications
DATE '12 Proceedings of the Conference on Design, Automation and Test in Europe
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This paper presents an optimization of the superregenerative architecture for impulse-based ultrawideband (UWB) technology dedicated to low-data-rate applications. The receiver belongs to the noncoherent category but enables nanosecond resolution for efficient location and tracking applications. Relying on analytical developments, this paper demonstrates how the super-regenerative architecture can suit the UWB context. Such a receiver enables a high RF gain and pulse-matched filter effect with tied power consumption to be achieved, thanks to the suitable control of the inherent unstable behavior. Bit-error-rate simulations based on this architecture are conducted and show a required Eb/no of 12.5 dB at 10-4 in the additive white Gaussian noise channel. RF impairment impacts are evaluated and demonstrate good tolerance to the oscillator central frequency accordance and synchronization issue. Specifications of the circuit and controlled signal are drawn up. To validate this concept, the design of the RF front is performed in the CMOS 0.13-µm technology. It includes an LNA, a transconductance stage, and the detector formed by a fully integrated LC-NMOS oscillator. This circuit consumes less than 10 mA for an RF gain above 50 dB and a 1-GHz-wide input signal bandwidth. The measured sensitivity is -99 dBm at 10-3 for a 1-Mb/s pulse rate for binary modulation.