APPARATUS FOR TRANSMITTING BROADCAST SIGNALS, APPARATUS FOR RECEIVING BROADCAST SIGNALS, METHOD FOR TRANSMITTING BROADCAST SIGNALS AND METHOD FOR RECEIVING BROADCAST SIGNALS

• US 20140314177A1
• Filed: 04/18/2014
• Published: 10/23/2014
• Est. Priority Date: 04/21/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Choi, Jinyong, Kim, Byounggill, Kim, Woochan, Kim, Jaehyung, Ko, Woosuk, Hong, Sungryong, Mun, Chulkyu, Hwang, Jaeho, Baek, Jongseob, Kwak, Kookyeon, Moon, Sangchul
• Granted Patent: US 9,191,082 B2
• Time in Patent Office: Days
• US Class Current: 375/296
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04H 20/44 Arrangements characterised by circuits or components specially adapted for broadcast
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/06 using space diversity
• CPC Class Codes: H04L 27/2046 in which the data are represented by carrier phase
• CPC Class Codes: H04L 27/34 Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0023 Time-frequency-space

Abstract

The present invention provides a method of transmitting broadcast signals. The method includes, formatting input streams into Data Pipe, DP, data; Low-Density Parity-Check, LDPC, encoding the DP data according to a code rate; bit interleaving the LDPC encoded DP data; mapping the bit interleaved DP data onto constellations according to one of QAM (Quadrature Amplitude Modulation), NUQ (Non-Uniform QAM) or NUC (Non-Uniform Constellation); Multi-Input Multi-Output, MIMO, encoding the mapped DP data by using a MIMO encoding matrix having a MIMO encoding parameter; building at least one signal frame by mapping the MIMO encoded DP data; and modulating data in the built signal frame by an Orthogonal Frequency Division Multiplexing, OFDM, method and transmitting the broadcast signals having the modulated data.

Claims

1. A method of transmitting broadcast signals, the method including:

formatting input streams into Data Pipe, DP, data;

Low-Density Parity-Check, LDPC, encoding the DP data according to a code rate;

bit interleaving the LDPC encoded DP data;

mapping the bit interleaved DP data onto constellations according to one of QAM (Quadrature Amplitude Modulation), NUQ (Non-Uniform QAM) or NUC(Non-Uniform Constellation);

Multi-Input Multi-Output, MIMO, encoding the mapped DP data by using a MIMO encoding matrix having a MIMO encoding parameter;

building at least one signal frame by mapping the MIMO encoded DP data; and

modulating data in the built signal frame by an Orthogonal Frequency Division Multiplexing, OFDM, method and transmitting the broadcast signals having the modulated data.

2. The method of claim 1,

wherein the MIMO encoding is performed according to either FR-SM (Full-rate spatial multiplexing) method or FRFD-SM (Full-rate Full-diversity spatial multiplexing) method.

3. The method of claim 2,

wherein the QAM, the NUQ and the NUC are defined depending on the code rate.

4. The method of claim 1,

wherein the MIMO encoding parameter is defined based on one of the QAM, the NUQ or the NUC.

5. A method of receiving broadcast signals, the method including:

receiving the broadcast signals having at least one signal frame and demodulating data in the at least one signal frame by an Orthogonal Frequency Division Multiplexing, OFDM, method;

parsing the at least one signal frame by de-mapping Data Pipe, DP, data;

Multi-Input Multi-Output, MIMO, decoding the DP data by using a MIMO decoding matrix having a MIMO decoding parameter;

de-mapping the MIMO decoded DP data from constellations according to one of QAM (Quadrature Amplitude Modulation), NUQ (Non-Uniform QAM) or NUC(Non-Uniform Constellation);

bit de-interleaving the de-mapped DP data;

Low-Density Parity-Check, LDPC, decoding the bit de-interleaved DP data according to a code rate; and

de-formatting the LDPC decoded DP data into ouput streams.

6. The method of claim 5,

wherein the MIMO decoding is performed according to either FR-SM (Full-rate spatial multiplexing) method or FRFD-SM (Full-rate Full-diversity spatial multiplexing) method.

7. The method of claim 6,

wherein the QAM, the NUQ and the NUC are defined depending on the code rate.

8. The method of claim 5,

wherein the MIMO decoding parameter is defined based on one of the QAM, the NUQ or the NUC.

9. An apparatus for transmitting broadcast signals, the apparatus including:

a formatting module configured to format input streams into Data Pipe, DP, data;

a Low-Density Parity-Check, LDPC, encoding module configured to LDPC encode the DP data according to a code rate;

a bit interleaving module configured to bit interleave the LDPC encoded DP data;

a mapping module configured to map the bit interleaved DP data onto constellations according to one of QAM (Quadrature Amplitude Modulation), NUQ (Non-Uniform QAM) or NUC(Non-Uniform Constellation);

a Multi-Input Multi-Output, MIMO, encoding module configured to MIMO encode the mapped DP data by using a MIMO encoding matrix having a MIMO encoding parameter;

a frame building module configured to build at least one signal frame by mapping the MIMO encoded DP data;

a modulating module configured to modulate data in the built signal frame by an Orthogonal Frequency Division Multiplexing, OFDM, method; and

a transmitting module configured to transmit the broadcast signals having the modulated data.

10. The apparatus of claim 9,

wherein the MIMO encoding module performs MIMO encoding according to either FR-SM (Full-rate spatial multiplexing) method or FRFD-SM (Full-rate Full-diversity spatial multiplexing) method.

11. The apparatus of claim 10,

wherein the QAM, the NUQ and the NUC are defined depending on the code rate.

12. The apparatus of claim 9,

wherein the MIMO encoding parameter is defined based on one of the QAM, the NUQ or the NUC.

13. An apparatus for receiving broadcast signals, the apparatus including:

a receiving module configured to receive the broadcast signals having at least one signal frame;

a demodulating module configured to demodulate data in the at least one signal frame by an Orthogonal Frequency Division Multiplexing, OFDM, method;

a parsing module configured to parse the at least one signal frame by de-mapping Data Pipe, DP, data;

a Multi-Input Multi-Output, MIMO, decoding module configured to MIMO decode the DP data by using a MIMO decoding matrix having a MIMO decoding parameter;

a de-mapping module configured to de-map the MIMO decoded DP data from constellations according to one of QAM (Quadrature Amplitude Modulation), NUQ (Non-Uniform QAM) or NUC(Non-Uniform Constellation);

a bit de-interleaving module configured to bit de-interleave the de-mapped DP data;

a Low-Density Parity-Check, LDPC, decoding module configured to LDPC decode the bit de-interleaved DP data according to a code rate; and

a de-formatting module configured to de-format the LDPC decoded DP data into ouput streams.

14. The apparatus of claim 13,

wherein the MIMO decoding module performs MIMO decoding according to either FR-SM (Full-rate spatial multiplexing) method or FRFD-SM (Full-rate Full-diversity spatial multiplexing) method.

15. The apparatus of claim 14,

wherein the QAM, the NUQ and the NUC are defined depending on the code rate.

16. The apparatus of claim 13,

wherein the MIMO decoding parameter is defined based on one of the QAM, the NUQ or the NUC.