Broadcast signal frame generating apparatus and broadcast signal frame generating method using layered division multiplexing

• US 10,631,136 B2
• Filed: 01/29/2019
• Issued: 04/21/2020
• Est. Priority Date: 03/06/2015
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Lee, Jae-Young, Park, Sung-Ik, Lim, Bo-Mi, Kwon, Sun-Hyoung, Kim, Heung-Mook
• Primary Examiner(s): Zhao, Wei
• Application Number:
  US16/261,375
• Publication Number:
  US 20190174269A1
• Time in Patent Office: 448 Days
• CPC Class Codes: H04J 11/00 Orthogonal multiplex systems, e.g. using WALSH codesH04J13/00 takes precedence
• CPC Class Codes: H04J 2011/0013 with TDM/TDMA
• CPC Class Codes: H04L 1/0058 Block-coded modulation
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/0083 Formatting with frames or packets; Protocol or part of protocol for error control
• CPC Class Codes: H04L 12/184 with heterogeneous receivers, e.g. layered multicast
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 27/26 Systems using multi-frequency codes H04L27/32 takes precedence
• CPC Class Codes: H04L 27/2605 Symbol extensions, e.g. Zero Tail, Unique Word [UW]
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

An apparatus and method for broadcast signal frame using layered division multiplexing are disclosed. An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a combiner configured to generate a multiplexed signal by combining a core layer signal and an enhanced layer signal at different power levels; a power normalizer configured to reduce the power of the multiplexed signal to a power level corresponding to the core layer signal; a time interleaver configured to generate a time-interleaved signal by performing interleaving that is applied to both the core layer signal and the enhanced layer signal; and a frame builder configured to generate a broadcast signal frame including a preamble for signaling, start position information of Physical Layer Pipes (PLPs) and time interleaver information shared by the core layer signal and the enhanced layer signal.

Claims

1. A method of generating broadcast signal frame, comprising:

generating a multiplexed signal by combining a core layer signal and an enhanced layer signal at different power levels;

reducing power of the multiplexed signal to a power level corresponding to the core layer signal;

generating a time-interleaved signal by performing time interleaving that is applied to both the core layer signal and the enhanced layer signal after combining the core layer signal and the enhanced layer signal; and

generating a broadcast signal frame including a preamble for signaling start position information of Physical Layer Pipes (PLPs),

wherein the time interleaving is shared for both the core layer signal and the enhanced layer signal

wherein the broadcast signal frame includes

a bootstrap;

the preamble; and

a super-imposed payload, and

wherein the start position information is identical to an index corresponding to a first data cell of a Physical Layer Pipe.

2. The method of claim 1, wherein the start position information indicates a start position of the Physical Layer Pipe using a cell addressing scheme.

3. The method of claim 1, wherein the preamble includes:

a PLP identification information for identifying the Physical Layer Pipes (PLPs); and

a layer identification information for identifying layers.

4. The method of claim 3, wherein the start position information is included in the preamble for each of the Physical Layer Pipes (PLPs) by using an index corresponding to only the PLP identification information among the PLP identification information and the layer identification information in a for loop.