Method for producing a multi-carrier signal, device, and corresponding computer program

Patent metadata

Field	Value
Publication number	US-10778491-B2
Application number	US-201716341642-A
Country	US
Kind code	B2
Filing date	Oct 16, 2017
Priority date	Oct 14, 2016
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

A method for generating a multicarrier signal formed by a temporal succession of multicarrier symbols, implementing the following steps for generating at least one block of multicarrier symbols: coding a set of information elements delivering a set of coded elements; puncturing a first sub-set of coded elements of the set of coded elements, according to a first puncturing pattern, delivering a first sub-set of punctured coded elements; puncturing a second sub-set of coded elements of the set of coded elements, complementary to the first sub-set, according to a second puncturing pattern, delivering a second sub-set of punctured coded elements; mapping, onto at least one complex symbol, of the punctured coded elements of the first and second sub-sets of punctured coded elements; and generating the block of multicarrier symbols from said at least one complex symbol.

First claim

The invention claimed is:

1. A method for generating a multicarrier signal formed by a temporal succession of multicarrier symbols, wherein the method comprises the following steps performed by a device for generating at least one block of multicarrier symbols:
coding a set of information elements delivering a set of coded elements,
puncturing a first sub-set of coded elements of the set of coded elements, according to a first puncturing pattern, delivering a first sub-set of punctured coded elements,
puncturing a second sub-set of coded elements of said set of coded elements, complementary to said first sub-set, according to a second puncturing pattern, delivering a second sub-set of punctured coded elements,
mapping the punctured coded elements of said first and second sub-sets of punctured coded elements onto at least one complex symbol, and
generating said block of multicarrier symbols from said at least one complex symbol wherein generating said block of multicarrier symbols comprises, for at least one carrier of said block of multicarrier symbols:
determining a power of interference affecting said carrier on N τ consecutive positions in time;
classifying the N τ positions according to said power of interference;
time-frequency mapping of the complex symbols built out of information elements of said first sub-set of punctured coded elements to the positions associated with a power of interference smaller than or equal to a pre-determined threshold, and complex symbols built out of redundancy elements of said first sub-set of punctured coded elements, obtained from said information elements, to the positions associated with a power of interference greater than the pre-determined threshold, and
time-frequency mapping of the complex symbols built out of the information elements of said second sub-set of punctured coded elements to the positions associated with a power of interference smaller than or equal to a pre-determined threshold and complex symbols built out of redundancy elements of said second sub-set of punctured coded elements, obtained from said information elements, to the positions associated with a power of interference greater than said pre-determined threshold.

2. The method of claim 1 , wherein a coding efficiency associated with said coding and puncturing steps of said first sub-set of coded elements is different from a coding efficiency associated with said coding and puncturing steps of said second sub-sets of coded elements.

3. The method of claim 1 , wherein said multicarrier symbols are transmitted at a faster-than-Nyquist rate.

4. The method of claim 1 , wherein the method comprises precoding a first sub-set of complex symbols, delivering a first sub-set of precoded complex symbols,
said precoding modifying a value of a complex symbol of said first sub-set of complex symbols to take account of an interference generated by at least one other complex symbol for transmission at the same instant or at a same frequency according to a pre-determined time-frequency transmission pattern.

5. The method of claim 4 , wherein said first sub-set of complex symbols is generated from the punctured coded elements of said first sub-set of coded elements, and said second sub-set of complex symbols is generated from the punctured coded elements of said second sub-set of coded elements.

6. The method of claim 1 , wherein the method further comprises a first step of interleaving of the punctured coded elements of said first sub-set of punctured coded elements and a second step of interleaving of the punctured coded elements of said second sub-set of punctured coded elements implemented prior to the mapping step.

7. The method of claim 6 , wherein said first step of interleaving implements at least one first interleaving pattern for the interleaving of the information elements of said first sub-set of punctured coded elements and a second interleaving pattern for the interleaving of redundancy elements of said first sub-set of punctured coded elements, obtained from said information elements, and said second step of interleaving implements at least one first interleaving pattern for the interleaving of the information elements of said second sub-set of punctured coded elements and a second interleaving pattern for the interleaving of redundancy elements of said second sub-set of punctured coded elements, obtained from said information elements.

8. The method of claim 1 , wherein said generating said block of multicarrier symbols takes account of at least one interference affecting at least one carrier of said multicarrier signal.

9. The method of claim 1 , wherein the number of positions N τ depends on the compression factor r defined for faster-than-Nyquist transmission.

10. A device for generating a multicarrier signal, formed by a temporal succession of multicarrier symbols, wherein the device comprises:
a processor; and
a non-transitory computer-readable medium comprising instructions stored thereon, which when executed by the processor configure the device to perform acts comprising:
coding a set of information elements delivering a set of coded elements,
puncturing a first sub-set of coded elements of said set of coded elements according to a first puncturing pattern, delivering a first sub-set of punctured coded elements,
puncturing a second sub-set of coded elements of said set of coded elements, complementary to said first sub-set, according to a second puncturing pattern, delivering a second sub-set of punctured coded elements,
mapping the punctured coded elements of said first and second sub-set of punctured coded elements onto at least one complex symbol, and
generating a block of multicarrier symbols from said at least one complex symbol;

wherein generating said block of multicarrier symbols comprises, for at least one carrier of said block of multicarrier symbols:
determining a power of interference affecting said carrier on N τ consecutive positions in time;
classifying the N τ positions according to said power of interference;
time-frequency mapping of the complex symbols built out of information elements of said first sub-set of punctured coded elements to the positions associated with a power of interference smaller than or equal to a pre-determined threshold, and complex symbols built out of redundancy elements of said first sub-set of punctured coded elements, obtained from said information elements, to the positions associated with a power of interference greater than the pre-determined threshold, and
time-frequency mapping of the complex symbols built out of the information elements of said second sub-set of punctured coded elements to the positions associated with a power of interference smaller than or equal to a pre-determined threshold and complex symbols built out of redundancy elements of said second sub-set of punctured coded elements, obtained from said information elements, to the positions associated with a power of interference greater than said pre-determined threshold.

11. A non-transitory computer-readable medium comprising a computer program comprising instructions for implementing a method for generating a multicarrier signal formed by a temporal succession of multicarrier symbols, when this program is executed by a processor of a device, wherein the instructions configure the device to:
coding a set of information elements delivering a set of coded elements,
puncturing a first sub-set of coded elements of the set of coded elements, according to a first puncturing pattern, delivering a first sub-set of punctured coded elements,
puncturing a second sub-set of coded elements of said set of coded elements, complementary to said f

Assignees

• Orange

Inventors

• Lahbabi Naila
• Lin Hao
• Abdel Nour Charbel
• Douillard Catherine

Classifications

• H04L1/0042

  Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape (H04L1/0067 takes precedence) · CPC title

• H04L25/03343

  Arrangements at the transmitter end · CPC title

• H04L5/006

  Quality of the received signal, e.g. BER, SNR, water filling · CPC title

• H04L5/0044 Primary

  Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH · CPC title

• H04L27/2698

  double density OFDM/OQAM system, e.g. OFDM/OQAM-IOTA system · CPC title