Phase rotation detection device and the radio base station apparatus having the same

摘要

A quadrantal compensation circuit 2051 performs quadrantal compensation on a despread signal. A between-symbol averaging circuit 2052 averages in-phase addition results over a period in which differential detection is performed. A differential detection circuit 2053 performs differential detection using averaged in-phase addition results. A between-finger averaging circuit 2057 averages differential detection output averaged between fingers. A normalization circuit 2058 normalizes differential detection output averaged between fingers. A multiplier 2060 multiplies differential detection output from the differential detection circuit 2053 by the complex conjugate of normalized differential detection output. An absolute value calculation circuit 2055 performs absolute value calculation for differential detection output after it has undergone frequency offset compensation. A between-finger averaging circuit 2059 averages differential detection output averaged between fingers. IMAGE