Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Patent
1996-03-21
1998-06-02
Bocure, Tesfaldet
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
375354, H04L 2706, H04L 700
Patent
active
057612498
ABSTRACT:
A decoder de-interleaver comprises a de-interleaver for de-interleaving received interleaved encoded data that includes periodic decoder synchronization signals to produce de-interleaved encoded data. A decoder decodes the de-interleaved encoded data to produce output data. The de-interleaver has a latency such that the de-interleaved encoded data is delayed by (B-1) times a period of the decoder synchronization signals plus a constant interval, where B is the interleave depth. A synchronization pulse generator receives the interleaved and encoded data and generates decoder synchronization pulses that are substantially coincident with the decoder synchronization signals. A delay unit is connected between the synchronization pulse generator and the decoder for delaying the decoder synchronization pulses by the constant interval. The decoder thereby receives decoder synchronization pulses that correspond to previous decoder synchronization signals, but functions properly because the relative timing is correct. The decoder has an error detecting function by which the first B-1 decoder synchronization pulses that are generated before the de-interleaver produces valid de-interleaved encoded data are ignored.
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Bocure Tesfaldet
LSI Logic Corporation
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