Freescale Semiconductor,inc.

Mark Elnekave

Moshe Tarrab

Idan Rozenberg

Yuval Peled

Eran Pisek

Lev Vaskevich

Jacob Tokar

There is provided a method for controlling fetch-ahead of Fetch Sets into a decoupling First In First Out (FIFO) buffer of a Variable Length Execution Set (VLES) processor architecture, wherein a Fetch Set comprises at least a portion of a VLES group available for dispatch to processing resources within the VLES processor architecture, comprising, for each cycle, determining a number of VLES groups available for dispatch from previously pre-fetched Fetch Sets, and only requesting a fetch-ahead of a next Fetch Set in the next cycle if one of a select set of criteria related to the number of VLES groups available for dispatch is true.

Method and apparatus for controlling fetch-ahead in a VLES processor architecture

A device and method for performing SISO decoding. The method comprising the steps of: (a) providing a trellis representative of an output of a convolutional encoder, the convolutional encoder has a coding rate of R, the trellis having a block length T. (b) assigning an initial conditions to each starting node of the trellis for a forward iteration through the trellis. (c) computing a forward metric for each node, starting from the start of the trellis and advancing forward through the trellis and storing forward metrics of nodes of a plurality of starting stages of windows. (d) repeating stages d(1)-d(3) until all lambdas of the trellis are calculated; d(1) retrieving forward metrics of nodes of a starting stage of a window, the retrieved forward metrics were computed and stored during step (c). d(2) computing and storing forward metrics for each node, starting from a second stage of the window and ending at the ending stage of the window. d(3) computing backward metrics for each node, starting from the ending stage of the window and ending at the starting stage of the window; wherein when backward metrics of nodes of a stage are computed and the forward metrics of the nodes of an adjacent stage were previously computed, the computation of backward metrics is integrated with the computation of lambda from the stage to the adjacent stage and a storage of the calculated lambdas.

Apparatus and method for performing SISO decoding

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Ramat Hasharon, Israel

Mark Elnekave