An impulse radio 60 GHz system for accurate positioning applications

An impulse radio (IR) 60 GHz positioning system is proposed to provide accurate positioning. Two typical IR signals for positioning systems, namely polarity codes and pulse position modulation (PPM), are considered. The ranging and positioning accuracy and reliable distance in residential environments are investigated. Both line-of-sight (LOS) and non-line-of-sight (NLOS) channels are examined. Simulation results are presented which show that there is no significant difference in the ranging error between IR 60 GHz systems using polarity codes and PPM, particularly at high SNRs. Results are presented which show that millimeter level accuracy in a LOS environment and centimeter level accuracy in a NLOS environment can be achieved for an SNR greater than 5 dB. The corresponding reliable ranging distance is between 21 m and 31 m, and the effective positioning range is between 100 m2 and 400 m2.