초록 ▼

A code detection apparatus, comprised of a unit for orthogonally detecting a spread spectrum modulated reception signal, a unit for applying phase compensation to the orthogonally detected signal components to produce orthogonal signals (I, Q), a unit for cumulatively adding the phase compensated or

A code detection apparatus, comprised of a unit for orthogonally detecting a spread spectrum modulated reception signal, a unit for applying phase compensation to the orthogonally detected signal components to produce orthogonal signals (I, Q), a unit for cumulatively adding the phase compensated orthogonal signals (I, Q) a predetermined number of times, a unit for generating square sums (.SIGMA.I).sup.2 +(.SIGMA.Q).sup.2 of the cumulatively added values of the orthogonal signals (I, Q), and a unit for detecting the code of the spread spectrum modulated reception signal based on the generated and output square sums (.SIGMA.I).sup.2 +(.SIGMA.Q).sup.2 obtained by changing the amount of the phase compensation in order to improve detection of synchronization.

대표청구항 ▼

[ What is claimed is:] [1.] A code detection apparatus comprising:detection means for orthogonally detecting a spread spectrum modulated reception signal and producing respective orthogonal components;a phase rotation amount generator for generating a phase rotation amount signal representing a desi

[ What is claimed is:] [1.] A code detection apparatus comprising:detection means for orthogonally detecting a spread spectrum modulated reception signal and producing respective orthogonal components;a phase rotation amount generator for generating a phase rotation amount signal representing a desired frequency compensation;a phase rotation unit receiving said orthogonal components from said detection means and said phase rotation amount signal for rotating a respective phase of said orthogonal components to generate rotated phase orthogonal components r.sub.ip, r.sub.qp ;an I-component extraction circuit and a Q-component extraction circuit each receiving said rotated phase orthogonal components for respectively generating two orthogonal signals (I, Q); andcumulative square summation means receiving said two orthogonal signals and for cumulatively adding each of said orthogonal signals (I, Q) a predetermined number of times, and calculating square sums (.SIGMA.I).sup.2 +(.SIGMA.Q).sup.2 of said cumulatively added orthogonal signals (I, Q) to produce a square sum signal for use in detecting a code of said spread spectrum modulated reception signal based on said calculated square sums (.SIGMA.I).sup.2 +(.SIGMA.Q).sup.2 obtained by changing the amount of the phase rotation.