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US 7,533,306 B2Granted
Turbo decoding apparatus and interleave-deinterleave apparatus
AssigneeFujitsu Limited
InventorsKazuhisa Obuchi, Tetsuya Yano, Kazuo Kawabata, Takaharu Nakamura
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Abstract
In an apparatus such as a turbo decoding apparatus in which it is necessary to carry out interleave operation and deinterleave operation, there are provided a memory unit (5) and a memory control unit (12) capable of changing data writing order and data reading order with respect to the memory unit (5) depending on whether data is to be interleaved or deinterleaved. With this arrangement, the single unit of memory (5) can function as an interleaver and a deinterleaver, thereby reducing the size and cost the device.
Claims3
An interleave-deinterleave apparatus comprising:
- an interleave/deinterleave memory unit that performs both interleave and deinterleave operations during turbo decoding;
- a pair of address selecting units, one selecting unit selectively connecting outputs of an address generating unit as a writing address of said interleave/deinterleave memory unit and another selecting unit connecting outputs of an address generating unit as a reading address for said interleave/deinterleave memory unit;
- and
- an address selection control unit for controlling the pair of address selecting units to effect operation of the interleave/deinterleave memory unit as an interleaver and a deinterleaver in a time divisional manner.
1 more element
Dependencies are inferred from the claim text.