Broadcast Signal Receiver Using MIMO Decoding for Robust OFDM Reception
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Solution Overview
Problem
Digital broadcast systems face challenges in enhancing data transmission efficiency, robustness, and flexibility, particularly in mobile and indoor reception, while maintaining compatibility with conventional broadcast methods.
Innovation Solution
The implementation of a MIMO (Multi-Input Multi-Output) system for receiving broadcast signals, which includes MISO processing and scalable video coding (SVC), allows for efficient data transmission and reception even in diverse environments, ensuring compatibility with conventional systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MIMO system is implemented to enhance data transmission efficiency and robustness, then transmission reliability and data rate improve, but device complexity and system configuration difficulty increase
Solution Approach 1:
The MIMO system is segmented into distinct functional modules: multiple transmit antennas (Tx1, Tx2) and receive antennas (Rx1, Rx2) are separated as independent signal paths, with dedicated processing units for each antenna pair. This modular segmentation allows the complex MIMO operations to be divided into manageable independent channels, reducing overall system complexity while maintaining transmission reliability
Solution Approach 2:
The patent transitions from conventional single-antenna SISO systems to multi-antenna MIMO systems by adding spatial dimensionality. Multiple antennas transmit and receive signals simultaneously across different spatial dimensions, enabling parallel data streams and improving reliability through spatial diversity without proportionally increasing system complexity
2Productivity
If MIMO processing is added to improve data transmission efficiency, then productivity increases, but device complexity increases
Solution Approach 1:
The patent combines multiple data streams from different antennas into unified processing pipelines. The receive signals from multiple antennas are merged and processed together through joint detection algorithms, allowing the system to achieve higher data transmission efficiency by exploiting spatial multiplexing while managing processing complexity through integrated rather than separate processing chains
Solution Approach 2:
The MIMO receiver is designed with universal processing capabilities that can handle multiple signal types and transmission modes through the same hardware infrastructure. The system can adaptively switch between different MIMO modes (spatial multiplexing, transmit diversity, receive diversity) using the same antenna array and processing units, improving productivity without requiring separate dedicated systems for each function
3Ease of operation
If conventional broadcast system is used to maintain compatibility, then ease of operation is maintained, but data transmission efficiency and robustness are limited
Solution Approach 1:
The broadcast system implements dynamic adaptability where the MIMO receiver can automatically adjust its operation mode based on channel conditions and signal characteristics. The system dynamically switches between MIMO processing modes and can fallback to conventional SISO processing when appropriate, maintaining ease of operation while maximizing data transmission efficiency under varying conditions
Solution Approach 2:
The patent employs parameter changes in the form of configurable MIMO processing parameters that can be adjusted based on transmission requirements. By modifying parameters such as antenna selection, processing mode, and signal combining methods, the system achieves higher data transmission efficiency while maintaining compatibility with conventional systems through appropriate parameter settings
Data Source
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AI summary
A method of receiving broadcast signals, which entails receiving at least two broadcast signals and demodulating the received broadcast signals by Orthogonal Frequency Division Multiplexing, OFDM, method; frequency de-interleaving each of the demodulated broadcast signals by a pair of cells; parsing at least two signal frames in each of the frequency de-interleaved broadcast signals to output a plurality of Physical Layer Pipes, PLPs and signaling information for signaling data of the PLPs; Bit Interleaved Coded Modulation, BICM, decoding the data of the PLPs with either a Multi-Input Single-Output, MISO scheme or a Multi-Input Multi-Output, MIMO scheme; and BICM decoding the signaling information with a MISO scheme, wherein at least one of the signal frames includes a preamble having a P1 symbol and an AP1 symbol, the P1 symbol identifying a format of the preamble, the AP1 symbol including additional transmission parameters.