Uplink baseband signal compression method, decompression method, device and system

A baseband data compression device, comprising:

• a signal obtaining module, configured to obtain a physical uplink shared channel (PUSCH) signal according to an uplink time-domain baseband signal of a user;
• a frequency-time transform module, configured to perform inverse discrete Fourier transform (IDFT) on the PUSCH signal to obtain a time-domain PUSCH signal;
• an amplitude/phase conversion module, configured to perform amplitude/phase conversion on the time-domain PUSCH signal to obtain an amplitude signal and a phase signal of the time-domain PUSCH signal;
• a quantization module, configured to perform amplitude quantization and phase quantization on the amplitude signal and the phase signal of the time-domain PUSCH signal respectively to obtain a quantized amplitude signal and a quantized phase signal of the time-domain PUSCH signal;
• and
• a coordinate translation module, configured to translate, according to a constellation quadrant where the time-domain PUSCH signal is located, an origin of coordinates to a preset position in the constellation quadrant where the time-domain PUSCH signal is located, and obtain coordinates of the time-domain PUSCH signal after the origin of coordinates is translated;
• wherein
• the amplitude/phase conversion module is configured to perform amplitude/phase conversion on the time-domain PUSCH signal according to the coordinates of the time-domain PUSCH signal, wherein the coordinates of the time-domain PUSCH signal are obtained after the origin of coordinates is translated, to obtain an amplitude signal and a phase signal of the time-domain PUSCH signal.

A baseband data decompression device, comprising:

• a first obtaining module, configured to obtain a quantized amplitude signal and a quantized phase signal of a time-domain PUSCH signal;
• an I/Q conversion module, configured to perform I/Q conversion on the quantized amplitude signal and the quantized phase signal of the time-domain PUSCH signal to obtain a complex PUSCH signal, wherein the complex PUSCH signal is a complex signal formed by I/Q components;
• a first transform module, configured to perform discrete Fourier transform (DFT) on the complex PUSCH signal to map the complex PUSCH signal to a frequency domain;
• a second transform module, configured to perform inverse discrete Fourier transform (IDFT) on the PUSCH signal that undergoes the DFT, to obtain a time-domain PUSCH signal;
• a demodulation module, configured to perform constellation demodulation on the time-domain PUSCH signal to obtain demodulated data;
• and
• a decoding module, configured to perform channel decoding on the demodulated data to obtain uplink data of a user.

An uplink baseband signal compression method, comprising:

• obtaining a physical uplink shared channel (PUSCH) signal according to an uplink time-domain baseband signal of a user;
• wherein the obtaining a physical uplink shared channel PUSCH signal according to an uplink time-domain baseband signal of a user comprises:
• obtaining an uplink time-domain baseband signal of a user,
• removing a cyclic prefix (CP) of the uplink time-domain baseband signal of the user to obtain a CP-removed uplink time-domain baseband signal,
• performing fast Fourier transform (FFT) on the CP-removed uplink time-domain baseband signal to transform the CP-removed uplink time-domain baseband signal into an uplink frequency-domain baseband signal, and
• performing resource block demapping on the uplink frequency-domain baseband signal to separate a PUSCH signal from the uplink frequency-domain baseband signal;
• performing inverse discrete Fourier transform (IDFT) on the PUSCH signal to obtain a time-domain PUSCH signal;
• performing amplitude/phase conversion on the time-domain PUSCH signal to obtain an amplitude signal and a phase signal of the time-domain PUSCH signal;
• performing amplitude quantization and phase quantization on the amplitude signal and the phase signal of the time-domain PUSCH signal respectively to obtain a quantized amplitude signal and a quantized phase signal of the time-domain PUSCH signal;
• performing resource block demapping on the uplink frequency-domain baseband signal to separate a reference signal (RS) from the uplink frequency-domain baseband signal;
• performing amplitude/phase conversion on the RS to obtain an amplitude signal and a phase signal of the RS;
• and
• performing amplitude quantization and phase quantization on the amplitude signal and the phase signal of the RS respectively to obtain a quantized amplitude signal and a quantized phase signal of the RS.

An uplink baseband signal compression method, comprising:

• obtaining a physical uplink shared channel (PUSCH) signal according to an uplink time-domain baseband signal of a user;
• performing inverse discrete Fourier transform (IDFT) on the PUSCH signal to obtain a time-domain PUSCH signal;
• performing amplitude/phase conversion on the time-domain PUSCH signal to obtain an amplitude signal and a phase signal of the time-domain PUSCH signal;
• performing amplitude quantization and phase quantization on the amplitude signal and the phase signal of the time-domain PUSCH signal respectively to obtain a quantized amplitude signal and a quantized phase signal of the time-domain PUSCH signal;
• and
• translating, according to a constellation quadrant where the time-domain PUSCH signal is located, an origin of coordinates to a preset position in the constellation quadrant where the time-domain PUSCH signal is located, and obtaining coordinates of the time-domain PUSCH signal after the origin of coordinates is translated;
• wherein
• the performing amplitude/phase conversion on the time-domain PUSCH signal to obtain an amplitude signal and a phase signal of the time-domain PUSCH signal comprises:
• performing amplitude/phase conversion on the time-domain PUSCH signal according to the coordinates of the time-domain PUSCH signal, wherein the coordinates of the time-domain PUSCH signal are obtained after the origin of coordinates is translated, to obtain an amplitude signal and a phase signal of the time-domain PUSCH signal.

An uplink baseband signal decompression method, comprising:

• obtaining a quantized amplitude signal and a quantized phase signal of a time-domain PUSCH signal;
• performing I/Q conversion on the quantized amplitude signal and the quantized phase signal of the time-domain PUSCH signal to obtain a complex PUSCH signal, wherein the complex PUSCH signal is a complex signal formed by I/Q components;
• performing discrete Fourier transform (DFT) on the complex PUSCH signal to map the complex PUSCH signal to a frequency domain;
• performing inverse discrete Fourier transform (IDFT) on the PUSCH signal that undergoes the DFT, to obtain a time-domain PUSCH signal;
• performing constellation demodulation on the time-domain PUSCH signal to obtain demodulated data;
• and
• decoding the demodulated data to obtain uplink data of a user.