A receiver apparatus for identifying line of sight, LOS, and non-line of sight, NLOS, conditions in a multipath channel of a vehicular communication system, the communication system comprising at least a transmitting node and a receiving node, which are configured to be in relative motion with respect to each other, the receiver apparatus included in a receiver of the receiver node, the transmitting node being further configured to transmit a plurality of non-periodic signals at a plurality of time points, the receiver apparatus comprising first and second antennas (201, 202) which are separated by a separation distance and configured to be mutually synchronized to a same oscillator and being configured to receive the plurality of non-periodic signals at the plurality of time points, the receiver apparatus further comprising: - a channel estimator configured for estimating, at each of the plurality of time points, first and second channel estimates respectively associated with each non-periodic signal received on the first and second antennas, each of the first and second channel estimates having multipath components arranged in clusters, a cluster comprising multipath components with approximately the same directions and delays; and - a channel processor configured for: - identifying a cluster of multipath components in each of the first and second channel estimates, wherein said identified cluster is received earlier in time than the remaining clusters, - generating a complex representation of each of the identified clusters comprising a complex amplitude component and one or more complex phase components, thereby generating first and second complex signals, - processing the first complex signal and/or the second complex signal so as to remove a phase component which is in common in the first and second complex signals, thereby creating a processed complex signal, the phase component resulting from the Doppler shift and the frequency synchronization errors due to the non-periodic nature of the received plurality of non-periodic signals, - a statistical hypothesis test unit for applying a coherent generalized likelihood ratio test, GRLT, algorithm to the processed complex signal to identify LOS or NLOS conditions. - a channel estimator configured for estimating, at each of the plurality of time points, first and second channel estimates respectively associated with each non-periodic signal received on the first and second antennas, each of the first and second channel estimates having multipath components arranged in clusters, a cluster comprising multipath components with approximately the same directions and delays; and - a channel processor configured for: - identifying a cluster of multipath components in each of the first and second channel estimates, wherein said identified cluster is received earlier in time than the remaining clusters, - generating a complex representation of each of the identified clusters comprising a complex amplitude component and one or more complex phase components, thereby generating first and second complex signals, - processing the first complex signal and/or the second complex signal so as to remove a phase component which is in common in the first and second complex signals, thereby creating a processed complex signal, the phase component resulting from the Doppler shift and the frequency synchronization errors due to the non-periodic nature of the received plurality of non-periodic signals, - identifying a cluster of multipath components in each of the first and second channel estimates, wherein said identified cluster is received earlier in time than the remaining clusters, - generating a complex representation of each of the identified clusters comprising a complex amplitude component and one or more complex phase components, thereby generating first and second complex signals, - processing the first complex signal and/or the second complex signal so as to remove a phase component which is in common in the first and second complex signals, thereby creating a processed complex signal, the phase component resulting from the Doppler shift and the frequency synchronization errors due to the non-periodic nature of the received plurality of non-periodic signals, - a statistical hypothesis test unit for applying a coherent generalized likelihood ratio test, GRLT, algorithm to the processed complex signal to identify LOS or NLOS conditions.