Patent ID: 7839817
Filing Date: 2010-11-23
Classification: H04L

Abstract:
1. An apparatus comprising: a first transform unit configured to receive as input data from a mobile station and to perform operations for transforming data received from the mobile station to generate a plurality of first outputs; a cross-correlation unit configured to receive the first outputs from the first transform unit and configured to compare the first outputs with possible ranging codes to generate a plurality of second outputs; a selective output unit configured to receive the second outputs from the cross-correlation unit and to selectively output portions of the second outputs that match one or more of the ranging codes; a second transform unit configured to receive the portions of the second outputs that are output by the selective output unit and to perform operations for transforming the portions of the second outputs to generate a plurality of third outputs; and a detection unit configured to receive the third outputs and to detect the ranging codes for the received data based on the third outputs.