Signal Clipping Processing Method and Device

A communications device, comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to:
• determine, according to scheduling information of a baseband unit (BBU), a cancellation pulse sequence, and store the cancellation pulse sequence, wherein the scheduling information indicates a modulation scheme used when each resource block for transmitting an input signal is used to transmit a data symbol;
• perform peak detection on the input signal, so as to obtain amplitude information, phase information, and location information of a peak signal of the input signal;
• obtain, according to amplitude information and phase information of each peak signal, a peak forming factor that corresponds to each peak signal and that is used to adjust an amplitude and/or a phase of a cancellation pulse sequence corresponding to the peak signal;
• send, separately, location information of each peak signal to a corresponding cancellation pulse generation module;
• output, separately and according to the location information of each peak signal, a corresponding cancellation pulse sequence;
• and
• calculate a sum of products of peak forming factors corresponding to all peak signals and cancellation pulse sequences corresponding to all the peak signals, so as to obtain a clipping noise, and use a difference between the input signal and the clipping noise as a signal obtained after clipping processing.

A communications device, wherein the communications device comprises:

• a cancellation pulse determining module, configured to determine, according to scheduling information of a baseband unit (BBU), a cancellation pulse sequence, and send the cancellation pulse sequence to each cancellation pulse generation module for storing, wherein the scheduling information is used to indicate a modulation scheme used when each resource block for transmitting an input signal is used to transmit a data symbol;
• a peak detection module, configured to perform peak detection on the input signal, so as to obtain amplitude information, phase information, and location information of a peak signal of the input signal;
• a peak forming module, configured to obtain, according to amplitude information and phase information of each peak signal, a peak forming factor that is corresponding to each peak signal and that is used to adjust an amplitude and/or a phase of a cancellation pulse sequence corresponding to the peak signal;
• an allocation module, configured to separately send location information of each peak signal to a corresponding cancellation pulse generation module;
• a cancellation pulse generation module, configured to separately output, according to the location information of each peak signal, a corresponding cancellation pulse sequence;
• and
• a processing module, configured to calculate a sum of products of peak forming factors corresponding to all peak signals and cancellation pulse sequences corresponding to all the peak signals, so as to obtain a clipping noise, and to use a difference between the input signal and the clipping noise as a signal obtained after clipping processing.