Spectrum shaping method for non-orthogonal waveform and electronic device

Patent metadata

Field	Value
Publication number	US-12526178-B2
Application number	US-202018245786-A
Country	US
Kind code	B2
Filing date	Oct 14, 2020
Priority date	Oct 14, 2020
Publication date	Jan 13, 2026
Grant date	Jan 13, 2026

Abstract

The present disclosure provides a spectrum shaping method for non-orthogonal waveforms and an electronic device. The electronic device includes: a processing unit configured to perform discrete Fourier transform spreading on data to be transmitted to obtain a spread signal, perform subcarrier mapping on the spread signal, perform spectrum shaping on subcarriers by using a spectrum shaping factor to obtain a shaped signal, and obtain a non-orthogonal Faster-Than-Nyquist signal according to the shaped signal; and a transmitting unit configured to transmit the non-orthogonal Faster-Than-Nyquist signal.

First claim

The invention claimed is:

1 . An electronic device, comprising:
a processing unit configured to perform discrete Fourier transform spreading on data to be transmitted to obtain a spread signal, perform subcarrier mapping on the spread signal, perform spectrum shaping on subcarriers by using a spectrum shaping factor to obtain a shaped signal, and obtain a non-orthogonal Faster-Than-Nyquist signal according to the shaped signal; and a transmitting unit configured to transmit the non-orthogonal Faster-Than-Nyquist signal, wherein the spectrum shaping factor includes an amplitude shaping factor, the processing unit performs spectrum shaping on the subcarriers by using the amplitude shaping factor, to reduce power of subcarriers truncated due to non-orthogonal Faster-Than-Nyquist modulation.

2 . The electronic device of claim 1 , wherein
the amplitude shaping factor for each subcarrier is determined according to frequency-domain values of a specific pulse function.

3 . The electronic device of claim 1 , wherein
the amplitude shaping factor for each subcarrier is determined according to power levels of subcarriers with truncated spectrum and subcarriers without truncated spectrum in non-orthogonal Faster-Than-Nyquist modulation.

4 . The electronic device of claim 1 , wherein
the spectrum shaping factor further includes a phase shaping factor, the processing unit further performs spectrum shaping on the subcarriers by using the phase shaping factor, to reduce influence of non-orthogonal Faster-Than-Nyquist modulation on a high peak-to-average power ratio.

5 . The electronic device of claim 1 , further comprising:
a receiving unit configured to receive shaping indication information indicating whether spectrum shaping is to be performed, the processing unit determines whether to perform spectrum shaping on the subcarriers by using the spectrum shaping factor to obtain the shaped signal according to the received shaping indication information.

6 . The electronic device of claim 1 , further comprising:
a receiving unit configured to receive a reference signal, the processing unit further determines the spectrum shaping factor according to the reference signal.

7 . The electronic device of claim 1 , further comprising:
a receiving unit configured to receive transfer function type information and information about a time-domain compression factor of non-orthogonal Faster-Than-Nyquist modulation, the processing unit further determines the spectrum shaping factor according to the transfer function type information and the information about the time-domain compression factor of the non-orthogonal Faster-Than-Nyquist modulation.

8 . A spectrum shaping method for non-orthogonal waveforms, comprising:
performing discrete Fourier transform spreading on data to be transmitted to obtain a spread signal; performing subcarrier mapping on the spread signal; performing spectrum shaping on subcarriers by using a spectrum shaping factor to obtain a shaped signal; obtaining a non-orthogonal Faster-Than-Nyquist signal according to the shaped signal; and transmitting the non-orthogonal Faster-Than-Nyquist signal, wherein the spectrum shaping factor includes an amplitude shaping factor, performing spectrum shaping on subcarriers by using the spectrum shaping factor to obtain the shaped signal comprises: performing spectrum shaping on the subcarriers by using the amplitude shaping factor, to reduce power of subcarriers truncated due to non-orthogonal Faster-Than-Nyquist modulation.

Assignees

• Ntt Docomo Inc

Inventors

• Liu Juan
• Liu Wenjia
• Hou Xiaolin

Classifications

• H04L27/2614

  Peak power aspects · CPC title

• H04L27/26412

  Filtering over the entire frequency band, e.g. filtered orthogonal frequency-division multiplexing [OFDM] · CPC title

• H04L25/03834

  using pulse shaping · CPC title

• H04L27/2644

  with oversampling · CPC title

• Y02D30/70

  in wireless communication networks · CPC title