Method of transmitting data for digital broadcasting in wireless communication system

• US 8,345,792 B2
• Filed: 10/23/2008
• Issued: 01/01/2013
• Est. Priority Date: 10/29/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kwon, Yeong Hyeon, Han, Seung Hee, Lee, Hyun Woo, Kwak, Jin Sam, Kim, Dong Cheol, Noh, Min Seok
• Primary Examiner(s): LEE, SIU M
• Application Number:
  US12/681,181
• Publication Number:
  US 20100272210A1
• Time in Patent Office: 1,531 Days
• Field of Search: 375/295, 375/259, 375/260, 375/285
• 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:

generating first coded data by repeating first data of a first layer based on a first repetition factor of the first layer;

generating second coded data by repeating second data of a second layer based on a second repetition factor of the second layer, the second repetition factor being larger than the first repetition factor;

mapping the first coded data to first symbols on a signal constellation by a first permutation;

mapping the second coded data assisting the first data to second symbols on the signal constellation by a second permutation;

multiplexing the first symbols and the second symbols by adding the first symbols and the second symbols in mixed order to generate multiple modulation symbols; and

transmitting the multiple modulation symbols through a multicast broadcast service (MBS) zone in a downlink burst region,

wherein a distance between the first symbols is longer than that between the second symbols on the signal constellation,

wherein a first scaling factor is applied to the first layer, second scaling factor is applied to the second layer, and the first scaling factor is larger than the second scaling factor, and

wherein the multiple modulation symbols are generated by Equation below;

S_M=α

₁·

S_L1+α

₂S_L2,

where α

₁ is the first scaling factor, S_L1 is one of the first symbols, α

₂ is the second scaling factor, and S_L2 is one of the second symbols.

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.