| Patent application number | Description | Published |
|---|
| 20090132896 | METRIC CALCULATIONS FOR MAP DECODING USING THE BUTTERFLY STRUCTURE OF THE TRELLIS - A method of calculating backward computations branch metrics for a butterfly in a trellis of a MAP-genre decoding algorithm, the method comprising providing initialised branch metrics for the transitions in the butterfly and incrementing the branch metrics with a group of data values corresponding to said transitions in accordance with control signals derived from the butterfly index and one or more polynomials describing tap positions of the encoding equipment to whose operation the trellis relates, wherein said group comprises systematic bit and parity bit values. | 05-21-2009 |
| 20090185644 | Soft Decision Processing - A method of producing soft decisions for a signal, wherein a model provides an expression for an LLR for the signal, the LLR expression is dependent on noise power in the signal and can be rendered in a form independent of the noise power, wherein the method comprises evaluating the noise power independent expression using values from the signal to produce soft decisions, calculating a weight expressing the noise power affecting a soft decision relative to the noise power affecting at least one other soft decision and applying the weight to its respective soft decision. | 07-23-2009 |
| 20090232263 | Timing Errors - A method of analysing a sampled signal that is supplied for decimation, wherein the decimation process produces a decimated version of the signal and wherein the method comprises determining an adjustment, if any is required, to the sampling instant of the signal prior to decimation that will cause the frequency responses of the decimated signal and of a main alias to combine constructively at a given frequency. | 09-17-2009 |
| 20100014614 | Digital Radio Systems - Apparatus comprising a pre-filter rake architecture with various features designed to, in at least some circumstances, to lessen the data processing burden associated with the architecture. In one embodiment, the pre-filter aspect can be disabled. | 01-21-2010 |
| 20100040176 | Channel Impulse Response Estimate Management - A method of steering a channel estimation search window, the method comprising providing a series of raw CIR tap values to span a channel estimation search window containing a sub-window whose contents are intended to be passed for further processing to produce a refined CIR estimate, determining, amongst a plurality of groups of continuous tap values within the window, the group containing the largest amount of signal energy and time-shifting the window as necessary to arrange that the group so determined occupies the sub-window. | 02-18-2010 |
| 20100054380 | Refinement of Channel Estimation With a Bank of Filters - A receiver for acquiring a signal through a propagation channel, the receiver comprising channel estimating means ( | 03-04-2010 |
