daiba - the shichi circuit and deflection - daiba which does mu phase presumption - the shichi circuit

摘要

PURPOSE:To realize the circuit with a small circuit scale and to reflect sufficiently noise and an estimate error of a characteristic of a transmission line or the like onto an antenna selection criterion and a frame phase estimate criterion by stopping a code series in a maximum likelihood series estimate circuit at a post-stage in a definite time. CONSTITUTION:The diversity circuit consists of a 1st phase rotation circuit applying phase rotation to a reception signal and outputting the result, a 2nd phase rotation circuit 32... a K-th phase rotation circuit 33 applying similar processing to other antenna outputs, a reception signal latch output circuit 34 receiving all reception signals subject to phase rotation of K-systems, latching them once, receiving a setting value from a setting value setting circuit 36 and outputting M-systems (M=K) of reception signals in response to the setting value, and an overall arithmetic circuit 35 calculating an evaluation function as to each reception signal and a reception signal subject to one system of phase rotation selected based on the evaluation function and an estimate value of the transmission line characteristic.