Transmitter and receiver
The LDM method in wireless transmission systems increases capacity by multiplexing and superimposing data sequences with separate control information, ensuring compatibility and accurate decoding in both existing and new broadcasting systems.
JP7847255B2Active Publication Date: 2026-04-16PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA
4 Cites 0 Cited by
Patent Information
- Application Number
- JP2025068399
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-04-16
- Estimated Expiration
- 2036-12-19
AI Technical Summary
Technical Problem
Existing wireless transmission systems, such as the ISDB-T system, face challenges in increasing transmission capacity without utilizing additional frequency bands, particularly in transitioning to higher resolution services like UHDTV.
Method used
Implementing a Layered Division Multiplexing (LDM) method by superimposing and multiplexing data sequences of different hierarchies, with control information transmitted separately to ensure compatibility with existing systems and accurate decoding in new systems.
Benefits of technology
Enhances transmission capacity without additional frequency bands, allowing seamless integration with existing ISDB-T systems and enabling accurate decoding in new broadcasting systems.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide a method enabling the increase of transmission capacity when implemented in combination with existing services.SOLUTION: A transmitting device is provided, comprising : bit interleaving portions 5231 and 3231 which generate a first bit sequence of a first data stream and a second bit sequence of a second data stream by performing bit interleaving, respectively; a mapping portion 5241 which generates a first modulation symbol sequence by mapping the first bit sequence; a mapping portion 3241 which generates a second modulation symbol sequence by mapping the second bit sequence; an addition portion 3261 which generates a multiplexed signal by superimposing the first and second modulation symbol sequences; and a TMCC / AC signal generation portion 5091 which generates a control signal from control information indicating a multiplexing method.SELECTED DRAWING: Figure 1
Need to check novelty before this filing date? Find Prior Art