Patent ID: 6122330
Filing Date: 2000-09-19
Classification: H04L

Abstract:
In a radio receiver for receiving a plurality of signal replicas each being modulated according to a multi-level digital modulating, a diversity combining method comprising the steps of:a) detecting a signal component from each signal replica, the signal component varying in amplitude;b) sampling the signal component in synchronization with the signal component to produce a sample value;c) determining a first distance between a first sample value and a predetermined level, the first sample value being produced from a first signal replica, and the predetermined level being a center level of a predetermined M-ary range where the first signal component varies in amplitude in accordance with M-ary FSK multilevel digital modulation;d) determining a second distance between a second sample value and the predetermined level, the second sample value being produced from a second signal replica and corresponding to the first sample value; ande) selecting one of the first sample value and the second sample value depending on which one of the first and second distances is larger than the other.