Abstract: The present application relates to a method and an apparatus for synchronizing a receiver timing to a transmitter timing using a known preamble of a signal. In at least one embodiment of the method and/or the apparatus of the present application, a power normalized cross-correlation metric (PNCC metric) is estimated based on a signal power and a noise floor power. According to a first embodiment, two cross-correlation functions, one based on the PNCC metric and the other based on a cross-correlation metric, are used to decide if synchronization events occur and based on the analysis of time indexes and PNCC magnitude values, a timing synchronization index used to synchronize receiver timing to transmitter timing is determined. According to a second embodiment, the cross-correlation function based on the PNCC metric is used to decide if synchronization events occur and based on an analysis of time indexes and PNCC magnitude values using a clustering approach, a timing synchronization index is determined.

Abstract: Low complex algorithms for estimating a delay spread or a RMS delay spread of a multipath channel using channel estimates are disclosed, leading to low overall power consumption. According to an embodiment of the present invention, a delay spread or a RMS delay spread of the multipath channel is determined based on a metric calculated as a function of channel estimates. In another embodiment, an average signal to noise ratio is taken into consideration in addition to the metric to estimate the delay spread or the RMS delay spread. In a further embodiment, the delay spread or the RMS delay spread of the multipath channel is estimated based on an average signal to noise ratio and on a metric being a function of the slope between subcarrier channel estimates. The present invention further relates to an apparatus for estimating a delay spread or a RMS delay spread of the multipath channel.

Abstract: The present application relates to a method and an apparatus for synchronising a receiver timing to a transmitter timing using a known preamble of a signal. In at least one embodiment of the method and/or the apparatus of the present application, a power normalised cross-correlation metric (PNCC metric) is estimated based on a signal power and a noise floor power. According to a first embodiment, two cross-correlation functions, one based on the PNCC metric and the other based on a cross-correlation metric, are used to decide if synchronisation events occur and based on the analysis of time indexes and PNCC magnitude values, a timing synchronisation index used to synchronise receiver timing to transmitter timing is determined. According to a second embodiment, the cross-correlation function based on the PNCC metric is used to decide if synchronisation events occur and based on an analysis of time indexes and PNCC magnitude values using a clustering approach, a timing synchronisation index is determined.

Abstract: Low complex algorithms for estimating a delay spread or a RMS delay spread of a multipath channel using channel estimates are disclosed, leading to low overall power consumption. According to an embodiment of the present invention, a delay spread or a RMS delay spread of the multipath channel is determined based on a metric calculated as a function of channel estimates. In another embodiment, an average signal to noise ratio is taken into consideration in addition to the metric to estimate the delay spread or the RMS delay spread. In a further embodiment, the delay spread or the RMS delay spread of the multipath channel is estimated based on an average signal to noise ratio and on a metric being a function of the slope between subcarrier channel estimates. The present invention further relates to an apparatus for estimating a delay spread or a RMS delay spread of the multipath channel.