Patent ID: 7123646
Filing Date: 2006-10-17
Classification: H04B

Abstract:
1. A synchronous acquisition device for a CDMA receiver that receives as a receiver signal a signal transmitted by spectrum-spreading transmission data including one of first to mth pieces (m: an integer 2 or more) of fixed data using a spreading code, having a plurality of paths into which the receiver signal is branched, wherein each of the paths includes: a first multiplier for multiplying the receiver signal by the spreading code; a first integrator for integrating an output signal of the first multiplier by one-symbol-time; fixed data sequential output units for having the first to mth pieces of fixed data and sequentially outputting the first to mth pieces of fixed data; a second multiplier for multiplying an output signal from the first integrator by the first to mth pieces of fixed data outputted from the fixed data sequential output units, and sequentially outputting first to mth multiplication results; correlation value sequential output units for sequentially outputting the first to mth multiplication results as first to mth correlation values; and a path-corresponding maximum value detector for detecting a maximum value of the first to mth correlation values.