Layered division multiplexing-based broadcast relay apparatus and method

• US 10,404,351 B2
• Filed: 03/02/2017
• Issued: 09/03/2019
• Est. Priority Date: 05/09/2016
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Seo, Jae-Hyun, Kim, Young-Min, Kim, Heung-Mook
• Primary Examiner(s): Masur, Paul H
• Assistant Examiner(s): Phillips, Michael K
• Application Number:
  US15/447,579
• Publication Number:
  US 20170324498A1
• Time in Patent Office: 915 Days
• CPC Class Codes: H04B 7/00 Radio transmission systems, i.e. using radiation field H04B10/00, H04B15/00 take precedence
• CPC Class Codes: H04B 7/14 Relay systems
• CPC Class Codes: H04B 7/15528 Control of operation parameters of a relay station to exploit the physical medium
• CPC Class Codes: H04H 20/02 Arrangements for relaying broadcast information
• CPC Class Codes: H04H 20/42 Arrangements for resource management
• CPC Class Codes: H04J 11/004 using regenerative subtractive interference cancellation
• CPC Class Codes: H04J 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: H04L 27/3488 Multiresolution systems

Abstract

Disclosed herein are a Layered Division Multiplexing (LDM)-based broadcast relay apparatus and method. The LDM-based broadcast relay apparatus includes a first layer symbol generation unit for outputting a first layer broadcast signal based on a received Layered Division Multiplexed (LDM) broadcast signal, a data buffer unit for storing the received LDM broadcast signal for a delay time before the first layer broadcast signal is output, and a second layer symbol generation unit for outputting a second layer broadcast signal by eliminating the first layer broadcast signal from the stored broadcast signal.

Claims

1. A Layered Division Multiplexing (LDM)-based broadcast relay apparatus, comprising:

a memory; and

one or more hardware processors to execute an operation including;

receiving a Layered Division Multiplexed (LDM) broadcast signal including a first layer broadcast signal and a second layer broadcast signal,

outputting the first layer broadcast signal based on the received LDM broadcast signal,

storing the received LDM broadcast signal in the memory for a delay time,

eliminating the output first layer broadcast signal from the stored LDM broadcast signal to output the second layer broadcast signal, and

transmitting the output second layer broadcast signal that results from the eliminating of the output first layer broadcast signal from the stored LDM broadcast signal.

2. The LDM-based broadcast relay apparatus of claim 1, wherein each of the first layer broadcast signal and the second layer broadcast signal has a form of a symbol unit.

3. The LDM-based broadcast relay apparatus of claim 2, wherein the outputting of the first layer broadcast signal and the outputting of the second layer broadcast signal occur after different power values have been injected into the first layer broadcast signal and the second layer broadcast signal.

4. The LDM-based broadcast relay apparatus of claim 3, wherein the output first layer broadcast signal is eliminated from the stored LDM broadcast signal based on symbol synchronization of the first layer broadcast signal.

5. A Layered Division Multiplexing (LDM)-based broadcast relay method using an LDM-based broadcast relay apparatus, comprising:

receiving a Layered Division Multiplexed (LDM) broadcast signal including a first layer broadcast signal and a second layer broadcast signal;

outputting the first layer broadcast signal based on the received LDM broadcast signal;

storing the received LDM broadcast signal in a memory for a delay time;

eliminating the output first layer broadcast signal from the stored LDM broadcast signal to output the second layer broadcast signal; and

transmitting the output second layer broadcast signal that results from the eliminating of the first layer broadcast signal from the stored LDM broadcast signal.

6. The LDM-based broadcast relay method of claim 5, wherein each of the first layer broadcast signal and the second layer broadcast signal has a form of a symbol unit.

7. The LDM-based broadcast relay method of claim 6, wherein the outputting of the first layer broadcast signal and the outputting of the second layer broadcast signal occur after different power values have been injected into the first layer broadcast signal and the second layer broadcast signal, respectively.

8. The LDM-based broadcast relay method of claim 7, wherein outputting the second layer broadcast signal is configured to eliminate the first layer broadcast signal from the stored LDM broadcast signal based on symbol synchronization of the first layer broadcast signal.