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本文提出了一种基于无晶振跳频接收机的长距离窄带射频定位系统，解决了GPS拒止环境下室内非视距场景中分米级精度与公里级覆盖的定位难题。该系统通过跳频技术实现低功耗窄带通信，并利用到达时间差进行高精度定位。
Semiconductor Japan, Yokohama, Japan 1 2 Emerging IoT applications, such as asset tracking and first-responder rescue operation, require a new localization solution that achieves decimeter-level accuracy for long range (km) in GPS-denied indoor non-line-of-sight (NLOS) scenarios. Impulse-response ultrawideband radar (IR-UWB) [1-3] can achieve high precision, but cannot operate in long distance NLOS conditions due to FCC-regulated transmit-power limits and severe pathloss through walls. Moreover, IR-UWB requires very high instantaneous power (> 70mW [2]) rendering it impractical for energy-constrained IoT with small batteries and high internal resistance. Lower-power solutions with narrower bandwidth, based on WiFi [4] or Bluetooth [5], typically have a limited range of < 100m or are not operable in
Chien-Wei Tseng1, Demba Komma1, Kuan-Yu Chen1, Rohit Rothe1, Zhen Feng1,
Makoto Yasuda2, Masaru Kawaminami3, Hun-Seok Kim1, David Blaauw1 University of Michigan, Ann Arbor, MI United Semiconductor Japan, Kuwana, Japan 3 United