Receiving device

摘要

A receiving device that receives a signal in a receiving antenna. The receiving device includes a gain controller that adjusts a gain in the receiving device in response to information related to power of the signal, and a signal detector that determines whether, within a predetermined period after the information related to the power of the signal exceeds a first threshold value, the information related to the power of the signal exceeds a second threshold value which is larger than the first threshold value. The gain controller adjusts a search range of the gain in the receiving device based on a determination result of the signal detector with respect to the information related to the power of the signal.

主权项

1. A reception apparatus comprising:
a gain controller which, in operation, adjusts a gain in the reception apparatus in accordance with information regarding a power of a signal received via a reception antenna; a counter which, in operation, counts a number of times the power of the signal exceeds a first threshold value; a delay unit which, in operation, holds a first count value at time t1 of the counter for a predetermined period; a subtractor which, in operation, subtracts the first count value at time t1 outputted from the delay unit from a second count value at time t2 outputted from the counter; a number-of-times determiner which, in operation, outputs a power detection signal indicating a strong electric field based on an output from the subtractor, wherein the gain controller adjusts a search range of the gain in the reception apparatus based on the power detection signal.