Matched filter
AssigneeFujitsu Limited
InventorsBen Chen, Makoto Uchishima
Life of this patent
Estimating the term…
Abstract
In a matched filter, a spread data path unit holds inputted spread data, a multiplier unit multiplies an output of the spread data path unit by a spreading replica code, and an adder unit adds results of the multiplication and outputs an added result. The spread data path unit comprises a first selector being able to selectively output the spread data, a plurality of sub spread data path units each having a plurality of latch circuits temporarily holding the spread data from the first selector, and a second selector being able to selectively output outputs from the sub spread data path units, whereby a circuit scale of the spread data path unit is decreased.
Claims12
A matched filter comprising:
- a spread data path unit comprising a first selector being able to selectively output spread data, a plurality of sub spread data path units each comprising a plurality of latch circuits temporarily holding the spread data from said first selector, and a second selector being able to selectively output outputs from said sub spread data path units;
- a spread data path input control unit comprising a selector control unit for performing a selection control on said first selector and said second selector according to an input of the spread data, and a data holding control unit for performing a data holding control on said sub spread data path units;
- a spreading code setting unit being able to set a spreading code;
- and
- an arithmetic unit for multiplying an output from said spread data path unit by the spreading code from said spreading code setting unit, adding results of the multiplication and outputting a result of the addition.
A matched filter comprising:
- a spread data path unit comprising a plurality of sub spread data path units in each of which a plurality of latch circuits are arranged in order that spread data is inputted thereto;
- a spread data path input control unit for performing a data writing control to said latch circuits in a predetermined order according to an input of the spread data;
- a spreading code setting unit being able to set a spreading code;
- and
- an arithmetic unit for multiplying an output from said spread data path unit by the spreading code from said spreading code setting unit, adding results of the multiplication and outputting a result of the addition.
Dependencies are inferred from the claim text.