MIMO gain and bandwidth scaling for RFID positioning in dense multipath channels
- Resource Type
- Conference
- Authors
- Hinteregger, Stefan; Leitinger, Erik; Meissner, Paul; Witrisal, Klaus
- Source
- 2016 IEEE International Conference on RFID (RFID) RFID (RFID), 2016 IEEE International Conference on. :1-6 May, 2016
- Subject
- Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Computing and Processing
Fields, Waves and Electromagnetics
Power, Energy and Industry Applications
Robotics and Control Systems
Signal Processing and Analysis
Signal to noise ratio
Interference
Bandwidth
Antennas
Backscatter
Distance measurement
Radiofrequency identification
- Language
This paper analyzes the achievable ranging and positioning performance for two design constraints in a radio frequency identification (RFID) system: (i) the bandwidth of the transmit signal and (ii) the use of multiple antennas at the readers. The ranging performance is developed for correlated and uncorrelated constituent channels by utilizing a geometry-based stochastic channel model for the downlink and the uplink. The ranging error bound is utilized to compute the precision gain for a ranging scenario with multiple collocated transmit and receive antennas. The position error bound is then split into a monostatic and bistatic component to analyze the positioning performance in a multiple input, multiple output (MIMO) RFID system. Simulation results indicate that the ranging variance is approximately halved when utilizing uncorrelated constituent channels in a monostatic setup. It is shown that both the bandwidth and the number of antennas decrease the error variance roughly quadratically.