Convolutional interleaving/de-interleaving method using pointer

Details Convolutional interleaving/de-interleaving method using pointer Convolutional interleaving/de-interleaving method using pointer

1997-10-06

2000-01-11

Cady, Albert De

Error detection/correction and fault detection/recovery

Pulse or data error handling

Data formatting to improve error detection correction...

714788, G06F 1100

Patent

active

06014761&

ABSTRACT:
In an (de)-interleaver (201) for J long subsequences (640-646) of data units (612), FIFOs are mapped into a memory (245) in such a way that locations (240) needed for one FIFO are moving through the memory (245). A generator (208) modulo increments only a single pointer (p, 230) which activates memory locations (240-p). Thereby, increments .DELTA.j correspond to FIFO sizes. For some p, (de)-interleaver (201) reads (25) a data unit (612) from a location (240) and than writes a new data unit (612) into that location (240), thus saving set-up times to establish a pointer. Also, the (de)-interleaver (201) needs only a number of memory locations K=(D-1 ) corresponding to a (D-1) interleaving depth. The (de)-interleaver (201) as part of a system (200) is fully programmable and can transfer data in two directions. Also, (de-) interleaving parameters (D-1) and J can be reconfigured during data transmission.

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B. Sklar "Digital Communications Fundamentals and Applications", Prentice Hall Englewood Cliffs, New Jersey 07632, pp. 357-364.

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