METHOD OF TRANSMITTING DATA FOR DIGITAL BROADCASTING IN WIRELESS COMMUNICATION SYSTEM

• US 20100272210A1
• Filed: 10/23/2008
• Published: 10/28/2010
• Est. Priority Date: 10/29/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Dong Cheol, Kwak, Jin Sam, Noh, Min Seok, Han, Seung Hee, Kwon, Yeong Hyeon, Lee, Hyun Woo
• Granted Patent: US 8,345,792 B2
• Time in Patent Office: Days
• US Class Current: 375/295
• CPC Class Codes: H04L 27/183 Multiresolution systems
• CPC Class Codes: H04L 27/2604 Multiresolution systems by means of multiresolution subcarriers H04L27/183, H04L27/3488
• CPC Class Codes: H04L 27/2627 Modulators
• CPC Class Codes: H04L 27/3477 by using the outer points of the constellation or of the constituent two-dimensional constellations

Abstract

A method of transmitting data in a wireless communication system includes mapping first data to first symbols on a signal constellation, mapping second data assisting the first data to second symbols on the signal constellation, modulating the first symbols and the second symbols, and transmitting the modulated first symbols and the second symbols, wherein the distance between the first symbols is longer than that between the second symbols on the signal constellation.

Claims

1. A method of transmitting data in a wireless communication system, the method comprising:

mapping first data to first symbols on a signal constellation;

mapping second data assisting the first data to second symbols on the signal constellation;

modulating the first symbols and the second symbols; and

transmitting the modulated first symbols and the second symbols, wherein the distance between the first symbols is longer than that between the second symbols on the signal constellation.

2. The method of claim 1, wherein the first symbols and the second symbols are mapped together.

3. The method of claim 1, wherein the first symbols and the second symbols are mapped respectively.

4. The method of claim 1, wherein the second data is differentially modulated.

5. The method of claim 1, wherein the first data is mapped in a first layer and the second data is mapped in a second layer.

6. The method of claim 5, wherein the first layer and the second layer are applied different scaling factors.

7. A method of transmitting data for a digital broadcast service in a wireless communication system, the method comprising:

transmitting first data through an multicast broadcast service (MBS) zone to support the digital broadcast service; and

multiplexing second data assisting the first data to the first data, and transmitting the same.

8. The method of claim 7, wherein the first data and the second data are mapped according to the same modulation scheme.

9. The method of claim 7, wherein symbols of the first data are mapped such that the distance between symbols is longer than that between symbols of the second data on a signal constellation.

10. The method of claim 7, wherein the first data is mapped to a first layer and the second data is mapped to a second layer, such that the distance between symbols of the first layer is longer than that between symbols of the second layer on a signal constellation.