Abstract: A wireless signal transceiver device includes a receiver unit, a conversion module, an estimation module, a processing unit, and a storage unit. The receiver unit is configured to receive a wireless signal. The conversion module is electrically connected to the receiver unit and configured to convert the wireless signal into a frequency-domain signal. The estimation module is electrically connected to the conversion module and configured to estimate the frequency-domain signal so as to obtain first channel state information. The first channel state information includes a plurality of channel state information sub portions. The processing unit is electrically connected to the estimation module and configured to filter the first channel state information so as to obtain second channel state information. The storage unit is electrically connected to the processing unit and configured to store the second channel state information.

Abstract: A bandwidth detection device comprises a receiving circuit, for receiving a first plurality of frequency-domain signals on a first subchannel; a filter circuit, coupled to the receiving circuit, for transferring the first plurality of frequency-domain signals to a first plurality of filtered frequency-domain signals according to a filter function; and a processing circuit, coupled to the filter circuit, for comparing the first plurality of frequency-domain signals with the first plurality of filtered frequency-domain signals, to determine whether the first subchannel comprises first transmitted data.

Abstract: A bandwidth detection device comprises a receiving circuit, for receiving a first plurality of frequency-domain signals on a first subchannel; a filter circuit, coupled to the receiving circuit, for transferring the first plurality of frequency-domain signals to a first plurality of filtered frequency-domain signals according to a filter function; and a processing circuit, coupled to the filter circuit, for comparing the first plurality of frequency-domain signals with the first plurality of filtered frequency-domain signals, to determine whether the first subchannel comprises first transmitted data.