| 摘要 |
In a wireless receiver, a “variance” of an intermediate output signal of a demodulation section is calculated by a variance calculation section, and the calculated variance is used as a signal quality indicator which indicates the degree of goodness of a receiving condition. For example, when the “variance” is small, a gain of a low-noise amplifier is reduced, or an operation clock frequency of a baseband oscillator is reduced, etc. Thus, when the receiving condition indicated by the indicator is good and sufficient performance is ensured, the performance can be slightly lowered to reduce power consumption. The “variance” is a compact indicator which can be calculated using a simple operation, and is used as a new signal quality indicator. |
