Patent ID: 8259782
Filing Date: 2012-09-04
Classification: H04B

Abstract:
1. A method for estimating a Gaussian white noise power in a channel, comprising: performing a multi-path search on a received signal for determining paths of the received signal; performing a noise estimation on one of the paths for determining a total noise power of the one of the paths; performing an inter-path interference noise estimation on one or more paths spaced apart from the one of the paths by one or more chips for determining an inter-path interference noise power of a single path of the signal; and obtaining the Gaussian white noise power by subtracting the inter-path interference noise power from the total noise power; wherein, the process of performing the inter-path interference noise estimation on the one or more paths spaced apart from the one path by the one or more chips to obtain an inter-path interference noise power of a single path of the signal comprises: performing a channel estimation on the one or more paths; obtaining the inter-path interference noise power of the single path of the signal according to the obtained channel estimate and a preset constant factor which is obtained by making a statistic on a Pseudo-Noise (PN) code autocorrelation side-lobe power; if a number of the one or more paths is one (1), the process of obtaining the inter-path interference noise power of the single path of the signal according to the obtained channel estimate and the preset constant factor comprises: multiplying a squared modulus of the obtained channel estimate by the preset constant factor for obtaining the inter-path interference noise power of the single path of the signal; and if the number of the one or more path is greater than one (1), the process of obtaining the inter-path interference noise power of the single path of the signal according to the obtained channel estimate and the preset constant factor comprises: accumulating the squared modulus of the obtained channel estimate and multiplying an accumulated value by the preset constant factor to obtain the inter-path interference noise power of the single path of the signal.