Wireless communication device

摘要

According to an embodiment, a wireless communication device, which complies with plural communication methods, includes a storing circuit and a received data selection determining circuit. The storing circuit sequentially stores a first received data until the first received data reaches a predetermined data size. When it is assumed that a radio signal complies to a second communication method, a first period is longer than a second period. The first period is a period from a first time when a reception of the radio signal is started to a second time when the first received data with the data size is stored. The second period is a period from the first time to a time when a second reception start signal is detected. The received data selection determining circuit determines a selection of the first received data, when the second reception start signal is not detected at the second time.

主权项

1. A wireless communication device configured to comply with a plurality of communication methods, the device comprising:
a rectifying circuit configure to rectify a radio signal received at an antenna; a first converting circuit configured to sequentially convert an output signal of the rectifying circuit into first received data in a conversion process for a first communication method; a second converting circuit configured to sequentially convert the output signal of the rectifying circuit into second received data in a conversion process for a second communication method; a first reception start signal detecting circuit configured to detect a first reception start signal specified in the first communication method from the first received data; a second reception start signal detecting circuit configured to detect a second reception start signal specified in the second communication method from the second received data, the second reception start signal being longer and more complicated than the first reception start signal; a storing circuit configured to sequentially store the first received data until the first received data reaches a predetermined data size, after the first reception start signal is detected, and in which, when it is assumed that the radio signal complies to the second communication method, a first period is equal to or longer than a second period, the first period being a period from a time when a reception of the radio signal is started to a time when the first received data with the data size is stored, the second period being a period from a time when a reception of the radio signal is started to a time when the second reception start signal is detected; a received data selection determining circuit configured to determine a selection of the first received data when the second reception start signal is not detected at the time the first received data with the data size is stored in the storing circuit, and determine a selection of the second received data when the second reception start signal is detected; and a receiving circuit configured to receive the first received data or the second received data that is determined in the received data selection determining circuit.