| 摘要 |
An antenna diversity switching method and receiver to avoid selecting an antenna providing poor reception sensitivity from among a plurality of antennas in response to a measured RSSI value equal to or lower than a predetermined value and thus preventing reception error that is caused by a noise component overlapping a received signal. A RSSI value and a phase likelihood value of a currently connected antenna are measured S1 and on basis of a comparison of RSSI value with a predetermined selection threshold value S4 , either one of the RSSI value and phase likelihood value is selected for comparison against a respective diversity switching criterion S7, S22. Antenna switching is performed if the criterion comparison S7, S22 of the selected value indicates that a switching condition is met. The selection threshold for selecting phase likelihood is a minimum value of a RSSI use range and thus appropriate switching will be carried out, even with a low level received signal, phase likelihood selectively being used when a noise component is at a high level. The criterion for the selection of antennas may be a function of an averaged, past or present value. |
