Hybrid analog-digital processing system for amplitude-monopulse RSSI-based MiMo wifi direction-of-arrival estimation
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Gómez Tornero, José Luis; Cañete Rebenaque, David; López Pastor, José Antonio; Martínez Sala, Alejandro SantosÁrea de conocimiento
Teoría de la Señal y las ComunicacionesPatrocinadores
This work was supported in part by the Spanish National Projects TEC2016-75934-C4-4-R, TEC2016-76465-C2-1-R and in part by Regional Seneca Project 19494/PI/14.Fecha de publicación
2018Editorial
IEEECita bibliográfica
Gómez-Tornero, José Luis et al. “Hybrid Analog-Digital Processing System for Amplitude-Monopulse RSSI-Based MiMo WiFi Direction-of-Arrival Estimation.” IEEE Journal of Selected Topics in Signal Processing 12 (2018): 529-540.Palabras clave
Direction of arrivalMonopulse antenna
RSSI-based localization
Hybrid analog digital signal processing
MiMo
Resumen
We present a cost-effective hybrid analog digital system to estimate the Direction of Arrival (DoA) of WiFi signals. The processing in the analog domain is based on simple wellknown RADAR amplitude monopulse antenna techniques. Then, using the RSSI (Received Signal Strength Indicator) delivered by commercial MiMo WiFi cards, the DoA is estimated using the socalled digital monopulse function. Due to the hybrid analog digital architecture, the digital processing is extremely simple, so that DoA estimation is performed without using IQ data from specific hardware. The simplicity and robustness of the proposed hybrid analog digital MiMo architecture is demonstrated for the ISM 2.45GHz WiFi band. Also, the limitations with respect to multipath effects are studied in detail. As a proof of concept, an array of two MiMo WiFi DoA monopulse readers are distributed to localize the two-dimensional position of WiFi devices. This costeffective hybrid solution can be applied to all WiFi standards and ...
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