| 摘要 |
Disclosed are a method for sending/receiving a signal, and a corresponding device and system. The method comprises: performing constellation mapping on a data stream so as to obtain a mapping signal; performing pre-filtering on the mapping signal so as to convert the mapping signal into a filtered signal of a narrow-band signal, wherein the pre-filtering is finite impulse response filtering, the bandwidth of the filtered signal of the narrow-band signal is less than that of the mapping signal, and the filtered signal of the narrow-band signal is a Baud rate signal; according to the filtered signal of the narrow-band signal, performing waveform shaping so as to obtain a shaping signal; performing digital-to-analogue conversion on the shaping signal so as to convert a second shaping signal to obtain an analogue signal for a signal transmitter to send the analogue signal. By converting a wide-band mapping signal into a narrow-band filtered signal through a filter, the transmitter of the solution enables the filtered signal to successfully pass through a digital-to-analogue converter which is of a narrow band as well, thereby reducing signal loss caused by insufficient bandwidth of a device. |
