TRANSMITTING CIRCUIT, TRANSCEIVER, COMMUNICATION SYSTEM AND METHOD FOR TRANSMITTING DATA

摘要

The present invention provides a transmitting circuit, a transceiver, a communication system, and a method for transmitting data. The transmitting circuit includes: a digital interface circuit, configured to obtain, in a predetermined bandwidth, data to be sent, and decompose the data into N parallel sub digital signal flows; a digital modulation circuit, configured to receive N sub digital signal flows, and modulate the N sub digital signal flows to obtain N modulated signals; a frequency relocation circuit, configured to receive the N modulated signals, and perform frequency relocation on the N modulated signals; a synthesizer, configured to modulate M modulated signals of the N modulated signals that have undergone frequency relocation into a bandwidth signal; a digital to analog converter, configured to receive the bandwidth signal, and perform digital to analog conversion on the bandwidth signal to obtain an analog signal; an up-conversion circuit, configured to receive the analog signal, and convert the analog signal into a radio frequency signal, so that the radio frequency signal is sent by an antenna. The present invention can reduce the signal processing complexity of a transmitting circuit, thereby improving system performance.