A wireless positioning system based on low-frequency（ LF） wake-up and ELM classification algorithm is designed. The circuit and communication loop for LF wake-up and RF response is designed

and listening of transponder with ultra-low power consumption is achieved. By comparing numeral RF positioning algorithms

select ELM-based classification positioning algorithm

LF wake-up RSSI data is classified and located

effectively reduce amount of computations at on-line stage of algorithm

realtime positioning computation is realized on MCU systems. Test result shows that the positioning precision in effective range can reach 15 cm

correctness rate of positioning is positioning is over 95 %

it is prior to UHF RF positioning systems in positioning precision and stability.