Method and apparatus for performing efficient correlation computation between data sequence and both of in-phase code sequence and quadrature code sequence
AssigneeMediatek Inc.
InventorKun-Tso Chen
Life of this patent
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Abstract
A correlation computation method includes: performing, by a grouping circuit, a grouping operation upon a data sequence according to an in-phase code sequence and a quadrature code sequence, wherein the data sequence is derived from a quadrature phase shift keying (QPSK) modulated signal; performing at least one accumulation operation upon data samples categorized into at least one data sample group by the grouping operation, to generate at least one accumulation result; and deriving a correlation value between the data sequence and both of the in-phase code sequence and the quadrature code sequence from the at least one accumulation result.
Claims22
A correlation computation method comprising:
- performing, by a grouping circuit, a grouping operation upon a data sequence according to an in-phase code sequence and a quadrature code sequence, wherein the data sequence is derived from a quadrature phase shift keying (QPSK) modulated signal;
- performing at least one accumulation operation upon data samples categorized into at least one data sample group by the grouping operation, to generate at least one accumulation result;
- and
- deriving a correlation value between the data sequence and both of the in-phase code sequence and the quadrature code sequence from said at least one accumulation result.
A correlation computation apparatus comprising:
- a grouping circuit, arranged to perform a grouping operation upon a data sequence according to an in-phase code sequence and a quadrature code sequence, wherein the data sequence is derived from a quadrature phase shift keying (QPSK) modulated signal;
- an accumulation-based circuit, arranged to perform at least one accumulation operation upon data samples categorized into at least one data sample group by the grouping circuit, to generate at least one accumulation result;
- and
- a processing circuit, arranged to derive a correlation value between the data sequence and both of the in-phase code sequence and the quadrature code sequence from said at least one accumulation result.
Dependencies are inferred from the claim text.