Adaptive Bit Stream Division for Multicarrier MIMO Throughput
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Solution Overview
Problem
Existing multicarrier MIMO communication systems face challenges in achieving robust and efficient data transmission with variable throughput rates across multiple channels, particularly in dynamic channel conditions, and have high complexity in bit-de/multiplexing processes.
Innovation Solution
A multicarrier MIMO transmitter and receiver system that includes a demultiplexer and symbol mapper unit to split and map input bit streams into multiple symbol streams, each associated with a different transmission channel, allowing for adaptive data throughput adjustment based on channel conditions, and a symbol demapper and multiplexer unit to reconstruct the output bit stream with even distribution of bits across channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If constant symbol mapping is used for all carriers in wireless multicarrier MIMO systems, then the system implementation is simple, but the data throughput rate cannot be adapted to varying channel conditions
Solution Approach 1:
The patent implements dynamic bit-de/multiplexing that adapts to varying channel conditions by adjusting the number of bits allocated to each transmission channel based on real-time channel quality feedback. This allows the system to optimize data throughput rates for each channel dynamically rather than using a fixed constant mapping, resolving the contradiction between adaptability and complexity through controlled dynamic adjustment mechanisms.
Solution Approach 2:
The system changes the parameter of bit allocation per channel based on channel conditions. By varying the number of bits assigned to each transmission channel according to its quality metric, the system achieves adaptive throughput while managing complexity through parameter-based control rather than structural complexity changes.
2Productivity
If dynamic bit-de/multiplexing is implemented to achieve variable throughput rates, then data transmission efficiency improves, but system complexity increases
Solution Approach 1:
The patent employs feedback mechanisms where channel quality information is continuously monitored and used to adjust bit allocation decisions. This feedback-driven approach enables efficient adaptive throughput optimization while managing complexity through algorithmic control based on real-time channel metrics rather than requiring complex reconfiguration of the entire transmission system.
Solution Approach 2:
The bit stream is segmented into different portions allocated to various transmission channels based on their individual qualities. This segmentation approach allows independent optimization of each channel's throughput while maintaining overall system manageability through modular bit distribution rather than monolithic complex processing.
3Reliability
If static bit-de/multiplexing is used, then the system is simpler to implement, but robustness in dynamic channel conditions deteriorates
Solution Approach 1:
The system transitions from static to dynamic bit-de/multiplexing that responds to changing channel conditions. By continuously adapting bit allocation based on real-time channel quality feedback, the system enhances robustness in dynamic environments while controlling complexity through targeted dynamic adjustment rather than complete system reconfiguration.
Data Source
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AI summary
The present invention relates to the field of bit-de-/multiplexing in multicarrier MIMO communication systems (e.g. precoded spatial multiplexing MIMO communication systems using adaptive OFDM). The present invention especially relates to a multicarrier MIMO transmitter and a multicarrier MIMO receiver. The multicarrier MIMO transmitter according to the present invention comprises a demultiplexer and symbol mapper unit for receiving an input bit stream and generating a plurality of symbol streams, each symbol stream being associated with a different transmission channel and comprising a plurality of data symbols, each data symbol being attributed to a different carrier; one or more multicarrier modulators for generating at least two multicarrier modulated signals based on the symbol streams; and at least two transmit ports for respectively transmitting the at least two multicarrier modulated signals, wherein a data throughput rate of each transmission channel is separately variable.