Continuous Precoding for Dynamic Transmission Property Adjustment
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Solution Overview
Problem
Existing wireless communication systems face challenges in dynamically adjusting transmission properties to maximize the benefits of continuous precoding, particularly in multi-user MIMO environments, where fine-granularity precoding is desired but difficult to implement due to limitations in channel estimation and precoding matrix selection across resource blocks.
Innovation Solution
The implementation of continuous precoding, which ensures phase and amplitude continuity across adjacent resource elements, allowing for frequency-selective precoding without abrupt changes, enabling low-cost wideband channel estimation and improved beamforming gain while reducing channel estimation complexity for receiving devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous precoding is applied across resource blocks, then beamforming gain and channel estimation efficiency are improved, but device complexity and precoding matrix selection difficulty increase
Solution Approach 1:
The patent segments the frequency spectrum into resource blocks (RBs) and applies continuous precoding across adjacent RBs. This segmentation allows the system to maintain phase and amplitude continuity over a wide bandwidth while managing complexity through structured RB-based organization. The receiving device can perform wideband channel estimation by exploiting the continuity across segmented RBs.
Solution Approach 2:
The patent applies precoding matrices to resource blocks in advance before transmission. The transmitting device determines and applies precoding matrices for multiple adjacent RBs beforehand, ensuring phase and amplitude continuity is established prior to signal transmission. This preliminary application of precoding simplifies the receiving device's channel estimation process.
2Manufacturing precision
If fine-granularity precoding is implemented across multiple resource blocks, then transmission precision and beamforming gain are improved, but implementation difficulty and overhead increase
Solution Approach 1:
The patent applies different precoding matrices to different resource blocks based on local channel conditions. Each RB or group of RBs can have its own precoding matrix selected from a codebook, allowing fine-grained adaptation to frequency-selective fading while maintaining continuity constraints. This local optimization achieves high precision without requiring a single complex precoder for the entire bandwidth.
Solution Approach 2:
The patent changes precoding parameters (phase and amplitude) continuously across adjacent resource blocks rather than abruptly. This continuous parameter variation maintains beamforming gain across the bandwidth while reducing the complexity of precoding matrix selection at boundaries between RBs.
3Productivity
If dynamic precoding adjustment is performed across resource blocks, then data transmission rates and system capacity are improved, but channel state feedback overhead increases
Solution Approach 1:
The patent merges channel estimation across multiple adjacent resource blocks by exploiting the continuity of precoding. Instead of requiring separate feedback for each RB, the system combines channel state information from multiple RBs, reducing the overall feedback overhead while maintaining high data transmission rates through wideband precoding.
Solution Approach 2:
The patent uses a codebook of predefined precoding matrices that can be copied and applied across multiple resource blocks. The transmitting and receiving devices share this codebook, allowing the receiver to generate feedback based on copied matrix selections rather than reporting full channel state information for each RB, thereby reducing feedback overhead.
Data Source
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AI summary
Aspects of the disclosure relate to a transmitting device, which may explicitly or implicitly signal the use of continuous precoding for a resource block (RB) cluster. For example, the transmitting device may implicitly indicate that continuous precoding is applied to an RB cluster by dynamically controlling one or more parameters of a transmission over those RBs. Further, when continuous precoding is applied to an RB cluster, the transmitting device may explicitly or implicitly signal the dynamic control over one or more transmission properties, with an aim to maximize the benefits of such continuous precoding. Other aspects, embodiments, and features are also clauseed and described.