The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 2000
Filed:
Oct. 06, 1997
Motorola, Inc., Schaumburg, IL (US);
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.