Patent ID: 8837312
Filing Date: 2014-09-16
Classification: H04B,H04J,H04L

Abstract:
1. A method for signature detection with timing offset bias compensation comprising: downsampling a random channel access signal received from a remote device at a predetermined sample period; generating a signal peak correlated to a random channel signature in a plurality of random channel signatures, the plurality of random channel signatures generated by cyclic-shifts of one or more predetermined root sequences; and compensating for a bias in a timing offset estimation, the bias being a result of a misalignment between the sample period and a zero-offset point in the random channel signature, said misalignment resulting from said downsampling a random channel access signal, wherein the compensating for a bias includes using a set of signature-specific pre-computed misalignment values, each misalignment value in the set of signature-specific pre-computed misalignment values corresponding to a misalignment value calculated for each signature in the plurality of random channel signatures before the generating a signal peak.