Cooperative DoA-Only Localization of Primary Users in Cognitive Radio Networks

Provided by: EURASIP
Topic: Networking
Format: PDF
In this paper, the authors investigate localization techniques based on Direction-of-Arrival (DoA) measurements to estimate the position of primary users in cognitive radio networks. In the proposed approach, different multi-antenna sensors estimate the DoA of a primary signal by subspace-based techniques and the target position is estimated from the available DoA measurements using maximum-likelihood, least-squares, or Stansfield estimators. The resulting localization performance is evaluated numerically and compared to the Cramr-Rao bound derived under a considered problem setting. The impact of several system parameters (in particular, number of sensors and number of antennas per sensors) is thoroughly analyzed and discussed

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