System and Method for Generating Waveforms and Utilization Thereof

• US 20160050039A1
• Filed: 08/10/2015
• Published: 02/18/2016
• Est. Priority Date: 08/15/2014
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Ma, Jianglei, Jia, Ming, Tong, Wen, Zhu, Peiying
• Granted Patent: US 10,523,383 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H03M 13/25 Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded Modulation [TCM] modulation codes H03M13/31
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04L 1/004 by using forward error control H04L1/0618 takes precedence; coding, decoding or code conversion, for error detection or correction H03M13/00
• CPC Class Codes: H04L 27/2615 Reduction thereof using coding
• CPC Class Codes: H04L 27/2634 Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
• CPC Class Codes: H04L 27/3411 reducing the peak to average power ratio or the mean power of the constellation; Arrangements for increasing the shape gain of a signal set
• CPC Class Codes: H04L 27/3416 in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04L 5/0021 in which codes are applied as a frequency-domain sequences, e.g. MC-CDMA

Abstract

A method for transmitting a waveform includes adjusting first multiplexing parameters of a first multi-carrier waveform to meet communications requirements of a communications system, generating a first signal in accordance with a first input bit block and a first modulation map, placing the first signal in a first subband, wherein the first subband is specified in accordance with the first adjusted multiplexing parameters, and transmitting the first subband.

Claims

1. A method for transmitting a waveform, the method comprising:

adjusting, by a transmitting device, first multiplexing parameters of a first multi-carrier waveform to meet communications requirements of a communications system;

generating, by the transmitting device, a first signal in accordance with a first input bit block and a first modulation map;

placing, by the transmitting device, the first signal in a first subband, wherein the first subband is specified in accordance with the first adjusted multiplexing parameters; and

transmitting, by the transmitting device, the first subband.

2. The method of claim 1, wherein the first multiplexing parameters comprises first frequency division multiplexing (FDM) parameters.

3. The method of claim 1, wherein the first signal is a first sparse code multiple access (SCMA) signal, and wherein the first modulation map is in correspondence with a first SCMA codebook.

4. The method of claim 1, wherein the communications requirements comprises at least one of data rate, symbol duration, subcarrier spacing, and cyclic prefix (CP) length.

5. The method of claim 1, wherein the first multiplexing parameters comprises at least one of a first subcarrier spacing, a first symbol duration, and a first CP length.

6. The method of claim 1, wherein the first multi-carrier waveform comprises an orthogonal frequency division multiplexing waveform.

7. The method of claim 1, wherein the first multi-carrier waveform comprises one of a single carrier frequency division multiple access (SC-FDMA) waveform, a multi-carrier code division multiple access (MC-CDMA) waveform, a filter bank multicarrier (FBMC) waveform, a discrete Fourier transform spread OFDM (DFT spread OFDM) waveform, and a filtered OFDM waveform.

8. The method of claim 1, wherein the first signal comprises N components and the first subband comprises M subcarriers, where N and M are integer values and M is greater than or equal to N.

9. The method of claim 1, further comprising:

filtering the first subband with a first filter prior to transmitting the first subband.

10. The method of claim 1, further comprising:

adjusting, by a transmitting device, second multiplexing parameters of a second multi-carrier waveform to meet the communications requirements;

generating, by the transmitting device, a second signal in accordance with a second input bit block and a second modulation map;

placing, by the transmitting device, the second signal in a second subband, wherein the second subband is specified in accordance with the second adjusted multiplexing parameters; and

transmitting, by the transmitting device, the second subband.

11. The method of claim 10, wherein the first multi-carrier waveform and the second multi-carrier waveform are zero peak to average power ratio (PAPR) waveforms.

12. The method of claim 1, further comprising transmitting a third subband including a non-zero PAPR waveform.

13. The method of claim 12, wherein the non-zero PAPR waveform comprises a filtered OFDM (F-OFDM) waveform.

14. A method for operating a receiving device, the method comprising:

determining, by the receiving device, multiplexing parameters;

receiving, by the receiving device, a first subband in accordance with the multiplexing parameters;

extracting, by the receiving device, a first signal from the first subband; and

processing, by the receiving device, the first signal in accordance with a first modulation map associated with the receiving device.

15. The method of claim 14, wherein the first signal comprises N components and the first subband comprises M subcarriers, where N and M are integer values and M is greater than or equal to N.

16. The method of claim 14, further comprising:

receiving a second subband in accordance with the multiplexing parameters;

extracting a second signal from the second subband; and

processing the second signal in accordance with a second modulation map associated with the receiving device.

17. The method of claim 16, wherein the first subband and the second subband include a different number of subcarriers.

18. The method of claim 16, wherein the first subband and the second subband are transmitted in different portions of a spectrum of a communications system including the receiving device.

19. The method of claim 16, wherein the first signal is a first sparse code multiple access (SCMA) signal, wherein the first modulation map is in correspondence with a zero peak to average power ratio (PAPR) SCMA codebook, wherein the second modulation map is in correspondence with a non-zero PAPR SCMA codebook.

20. The method of claim 19, wherein the second subband is transmitted in a filtered OFDM waveform.

21. A transmitting device comprising:

a processor; and

a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to

adjust first multiplexing parameters of a first multi-carrier waveform to meet communications requirements of a communications system,

generate a first signal in accordance with a first input bit block and a first modulation map,

place the first signal in a first subband, wherein the first subband is specified in accordance with the first adjusted multiplexing parameters, and

transmit the first subband.

22. The transmitting device of claim 21, wherein the programming includes instructions to filter the first subband with a first filter prior to transmitting the first subband.

23. The transmitting device of claim 21, wherein the programming includes instructions to adjust second multiplexing parameters of a second multi-carrier waveform to meet the communications requirements, generate a second signal in accordance with a second input bit block and a second modulation map, place the second signal in a second subband, wherein the second subband is specified in accordance with the second adjusted multiplexing parameters, and transmit the second subband.

24. The transmitting device of claim 21, wherein the programming includes instructions to transmit a third subband including a non-zero peak to average power ratio (PAPR) waveform.

25. A receiving device comprising:

a processor; and

a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to;

determine multiplexing parameters,

receive a first subband in accordance with the multiplexing parameters,

extract a first signal from the first subband, and

process the first signal in accordance with a first modulation map associated with the receiving device.

26. The receiving device of claim 25, wherein the programming includes instructions to receive a second subband in accordance with the multiplexing parameters, extract a second signal from the second subband, and process the second signal in accordance with a second modulation map associated with the receiving device.