MIMO Broadcast Transmitter With Rotation Matrix And Segmentation
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Solution Overview
Problem
Digital broadcast systems face challenges in enhancing data transmission efficiency, maintaining robustness and flexibility, especially in indoor environments and with mobile receiving equipment, while maintaining compatibility with conventional systems.
Innovation Solution
A method and apparatus utilizing MIMO processing with OFDM demodulation, frequency deinterleaving, and frame parsing to enhance data transmission efficiency and error-free reception, incorporating SVC technologies for adaptable video coding and encoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MIMO processing is implemented to enhance data transmission efficiency, then data transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The MIMO processing is segmented into distinct functional blocks: MIMO encoder, OFDM modulator, OFDM demodulator, and MIMO decoder. Each block handles a specific aspect of the MIMO processing chain, allowing the complex MIMO functionality to be divided into manageable, independent modules that can be implemented and maintained separately.
Solution Approach 2:
The patent introduces intermediate processing blocks between the MIMO encoding/decoding and the final signal processing. The OFDM modulator and demodulator act as intermediaries that transform the MIMO-processed signals into a format suitable for transmission and reception, bridging the gap between the MIMO processing domain and the physical transmission domain.
2Reliability
If MIMO processing is used to improve robustness in indoor environments, then reception reliability is improved, but device complexity increases
Solution Approach 1:
The reception process is segmented into distinct stages: OFDM demodulation, MIMO decoding, and signal processing. This segmentation allows the receiver to process MIMO signals in a structured manner, improving reliability by ensuring that each processing stage can be optimized and error-checked independently.
Solution Approach 2:
The MIMO decoder utilizes feedback mechanisms to improve reception reliability in challenging indoor environments. The decoder processes the received signals from multiple antennas and uses iterative decoding algorithms that refine the signal reconstruction based on feedback from previous decoding attempts, thereby improving robustness against multipath fading and interference.
3Productivity
If MIMO processing with multiple antennas is implemented, then data transmission efficiency is enhanced, but ease of operation deteriorates
Solution Approach 1:
The MIMO processing system is designed with universal blocks that can handle multiple functions. The MIMO encoder and decoder are configured to work with different antenna configurations and modulation schemes, allowing the system to maintain high data transmission efficiency while providing a unified interface that simplifies operation across different scenarios.
4Adaptability or versatility
If MIMO broadcast signals are encoded per PLP or per frame using SVC technologies, then adaptability is improved, but device complexity increases
Solution Approach 1:
The broadcast signal is segmented into multiple PLPs (Physical Layer Pipes) that can be independently encoded and transmitted. SVC (Scalable Video Coding) technologies are applied to each PLP or frame, allowing the system to adapt to different reception conditions and device capabilities. This segmentation enables flexible configuration where different parts of the signal can be processed with different levels of complexity.
Solution Approach 2:
The encoding configuration is made dynamic through SVC technologies, which allow the system to adapt the coding parameters, resolution, and bitrate based on channel conditions and receiver capabilities. This dynamic adaptation enables the broadcast system to optimize performance for different scenarios without requiring multiple fixed systems.
Data Source
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Figure 2(A)~2(B)
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AI summary
An apparatus for transmitting broadcast signals, the apparatus comprising: a Forward Error Correction, FEC, encoder (47050) to encode Physical Layer Pipe, PLP, data; a bit interleaver (47060) to bit interleave the FEC encoded PLP data bits; a demultiplexer (47070) to generate first and second input data from the bit-interleaved PLP data bits; a Quadrature Amplitude Modulation, QAM, mapper (47080) to map the first and second input data onto constellations for outputting first symbols of M-QAM constellations and second symbols of N-QAM constellations; a Multi-input Multi-Output, MIMO, processor (47090) to perform MIMO processing on the first and second symbols to output MIMO processed first and second data, wherein the MIMO processing is performed by applying a predetermined MIMO processing matrix to the first and second symbols; a time interleaver (47100) to time interleave the MIMO processed first and second data; a frame builder (47020) to build first and second signal frames including the time interleaved first and second data; an Orthogonal Frequency Division Multiplexing, OFDM, generator (47040) to modulate first and second broadcast signals including the first and second frames by an OFDM method; and a transmitter to transmit the modulated first and second broadcast signals.