Patent ID: 7903726

Claim:
A signal receiving apparatus, comprising: an indicating unit to indicate whether data can be received; a receiving unit to receive data; a system unit which comprises a plurality of electronic components to provide signal processing; a storing unit to store information related to a noise level; and a controlling unit to estimate a signal power level of the data received by the receiving unit, to calculate an actual receiving sensitivity of the data from the information related to the noise level stored in the storing unit by reflecting a carrier to noise level, to compare the estimated signal power level of the data with the calculated receiving sensitivity, and to control the indicating unit to indicate whether the data can be received based on the compared result, wherein the information related to a noise level comprises information where the noise level per frequency varies according to at least one of a state of power supplied to the system unit, a current state of a battery, and a type of antenna included in the receiving unit.