MIMO Transmitter Preprocessing Filter for Signal Complexity Reduction
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Solution Overview
Problem
In massive MIMO environments, existing technologies face challenges in minimizing transmission signal generation complexity while maintaining performance, particularly due to the increasing number of antennas which leads to performance degradation and high computational complexity.
Innovation Solution
A method involving the selection of a reference RE, generation of a common precoder and preprocessing filter based on channel information, and compensation of signals using these filters to reduce complexity and enhance processing efficiency in MIMO transmitters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of transmission antennas is increased in massive MIMO system, then communication capacity is improved, but transmission signal generation complexity increases
Solution Approach 1:
The patent segments the channel information processing by selecting a reference resource element (RE) from an RE group and generating precoding matrices based on this reference. This segmentation allows the system to handle massive MIMO with many antennas by breaking down the complex channel state information into manageable units centered around a reference point, thereby reducing the overall computational complexity while maintaining communication capacity.
Solution Approach 2:
The patent performs preliminary action by pre-generating precoding matrices based on channel information of a reference RE before actual transmission. This preliminary processing allows the system to prepare signal generation parameters in advance, reducing real-time computational complexity when dealing with a large number of transmission antennas, thus resolving the contradiction between antenna quantity and signal generation complexity.
2Quantity of substance
If the number of transmission antennas is increased, then communication capacity is improved, but performance degradation occurs due to interference
Solution Approach 1:
The patent applies local quality by generating precoding matrices that are specifically adapted to the channel conditions of a reference RE and its surrounding REs. This localized approach ensures that signal processing is optimized for specific spatial and frequency regions, maintaining transmission performance even when the number of antennas increases and interference becomes more significant.
Solution Approach 2:
The patent utilizes parameter changes by adjusting precoding matrix generation based on channel information from the reference RE. By dynamically changing precoding parameters according to reference channel conditions, the system can adapt to varying interference levels caused by multiple antennas, thereby maintaining reliable transmission performance across different antenna configurations.
3Device complexity
If common precoder and preprocessing filter are generated based on reference RE, then signal generation complexity is reduced, but processing speed may be affected
Solution Approach 1:
The patent performs preliminary action by pre-generating precoding matrices and preprocessing filters based on reference RE channel information before actual data transmission. This advance preparation reduces real-time processing requirements, allowing the system to achieve both low complexity and high processing speed by performing computationally intensive operations in advance rather than in real-time.
Solution Approach 2:
The patent applies universality by making the precoder and preprocessing filter generated from the reference RE applicable to multiple REs within the same group. This multi-functional approach allows a single set of parameters to serve multiple purposes and multiple resource elements, simultaneously reducing complexity and improving processing efficiency by avoiding redundant calculations for each individual RE.
Data Source
AI summary
A method of generating a transmission signal and a MIMO transmitter are disclosed. The method includes the steps of selecting a reference RE from an RE group including a plurality of resource elements (REs), generating a common precoder and a preprocessing filter to be shared by the plurality of the REs belonging to the RE group based on channel information of the reference RE, generating first signals corresponding to a precoding signal for each of the plurality of the REs in a manner of applying the common precoder to transmission data of each of the plurality of the REs and generating second signals in a manner of compensating first signals of REs except the reference RE among the plurality of the REs using channel information of each of plurality of the REs and the preprocessing filter.