Patent ID: 8526483

Claim:
A power line channel-adaptive communications system, comprising: a transmitting end for generating an extended adaptive chirp symbol signal of a preset type for transmission data according to a channel state of the power line, modulating the generated adaptive chirp symbol signal in one of first and second transmission modes, and transmitting the modulated adaptive chirp symbol signal via the power line channel; a channel-adaptive controller for controlling the type of the adaptive chirp symbol signal; and a receiving end for restoring the transmission data by demodulating the adaptive chirp symbol signal, received via the power line channel, in the one of the first and second transmission modes, wherein the one of the first and second transmission modes is selected by the channel-adaptive controller according to the channel state of the power line, and wherein the transmitting end comprises: a Forward Error Correction (FEC) encoder for encoding the transmission data so that errors of the transmission data can be detected and corrected; a Serial-to-Parallel (S/P) converter for converting the FEC-encoded data into parallel data; an adaptive symbol mapper for generating the extended adaptive chirp symbol signal of the preset type according to the channel state of the power line based on the parallel data; a dual transmission mode signal modulator for modulating the generated adaptive chirp symbol signal in the one of the first and second transmission modes according to the channel state of the power line; a Digital-to-Analog (D/A) converter for converting the modulated adaptive chirp symbol signal into an analog signal; a Band Pass Filter (BPF) for filtering the analog signal; and an amplifier for amplifying the filtered analog signal and transmitting the amplified signal via the power line channel through a signal coupler.