LOS/NLOS detection by the normalized Rayleigh-ness test

Deciding for the possible presence of a LOS component in a wireless radio link is preliminary to several operations that a communication receiver has to accomplish. In fact, NLOS radio models require more complex signal processing algorithms for data detection. We propose to adopt the normalized version of the Rayleigh-ness test (recently introduced for code acquisition purposes, as a measure of the Ricianity of the series under investigation) to obtain here a self-tunable test, independent of the actual power of the received signal. The achieved results evidence the robustness of the test.