An Energy-Efficient IR-UWB Receiver Based on Distributed Pulse Correlator
An Energy-Efficient IR-UWB Receiver Based on Distributed Pulse Correlator
复制标题
基于分布式脉冲相关器的节能IR-UWB接收器
DOI：
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发表时间：
2013
影响因子：
4.3
通讯作者：
Hui Wu
中科院分区：
文献类型：
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作者：
Jianyun Hu;Yunliang Zhu;Shang Wang;Hui Wu
提出了一种用于超宽带脉冲无线电（IR-UWB）接收机脉冲检测的新电路技术--分布式脉冲相关器（DPC）。在几种IR-UWB收发器结构中，模拟相关接收器具有性能好和降低电路复杂度的优点，但需要具有良好时间分辨率的相关器和模板脉冲。为了实现精细的时间分辨率和低功耗，DPC时间交错多个采样级在节能脉冲模式下操作，并结合了一个内置的机制来生成可重新配置的本地模板脉冲。DPC的操作进行了理论分析，其性能评估，然后详细讨论其电路实现。采用0.18 μm标准数字CMOS工艺，设计并制作了一个3-10 GHz的模拟相关接收机芯片原型，该接收机采用8抽头、10 GSample/s DPC。在测量中，DPC以40 pJ/脉冲的能量效率实现了250 MHz的脉冲速率，并且整个接收器在250 MHz的脉冲速率下实现了190 pJ/脉冲的能量效率。完整的IR-UWB链路（发射机，接收机和天线）也进行了测试。
A new circuit technique called distributed pulse correlator (DPC) is proposed for pulse detection in ultra-wideband impulse radio (IR-UWB) receivers. Among several IR-UWB transceiver architectures, an analog correlation receiver has the advantages of good performance and reduced circuit complexity, but requires a correlator and a template pulse with good time resolution. To achieve both fine time resolution and low power consumption, a DPC time-interleaves multiple sampling stages operating in a power-saving pulsed mode and incorporates a built-in mechanism to generate the reconfigurable local template pulse. The operation of the DPC is theoretically analyzed and its performance evaluated, followed by a detailed discussion of its circuit implementation. A chip prototype of a 3-10-GHz analog correlation receiver employing an eight-tap, 10-GSample/s DPC was designed and fabricated in a 0.18-μm standard digital CMOS technology. In the measurement, the DPC achieves a pulse rate of 250 MHz with an energy efficiency of 40 pJ/pulse, and the whole receiver achieves an energy efficiency of 190 pJ/pulse at the 250-MHz pulse rate. The complete IR-UWB link (a transmitter, a receiver, and antennas) is also tested.