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该论文提出了一种低功耗多标准接收机前端，通过模拟有限脉冲响应（AFIR）滤波器实现陡峭的通道选择，解决了传统低功耗接收机干扰抑制能力不足的问题。该接收机兼容BLE/BT5.0/IEEE 802.15.4标准，在370µW功耗下实现了5.5dB噪声系数和>63dB的邻道抑制（>2信道偏移）。
Analog Devices, Cork, Ireland 1 2 Upcoming Internet-of-Things (IoT) applications require low-power multi-standard RF receiver (RX) front-ends. Interference rejection becomes increasingly important as ever more devices compete in the scarce low-GHz spectrum. Typically, low-power RXs do not possess very steep filtering [1-6]. On the other hand, very selective RXs – e.g. using analog FIR or Filtering-by-Aliasing [7] – have very high power consumption, not suitable for IoT applications. A recent Analog Finite-Impulse-Response (AFIR) filter [8] shows promising results to improve channel filtering. [8] uses a much lower FIR update rate than [7] to considerably reduce power consumption. This comes at the cost of a filter alias, but the inherent windowed integration sinc filtering mitigates this filter alias. Achieving low RX Noise Figure (NF), while improving selectivity is challenging at ultra-low power,
Bart J. Thijssen1, Eric A. M. Klumperink1, Philip Quinlan2, Bram Nauta1
University of Twente, Enschede, The Netherlands