Uplink Precoding Codebook Structure for Lower Power Amplifier Loss
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Solution Overview
Problem
Current uplink pre-coding methods in cellular radio mobile communication systems lack an efficient solution to reduce power loss in power amplifiers, often resorting to using downlink codebooks which can increase power amplifier power loss.
Innovation Solution
A new codebook design and method that includes specific matrix elements and a process to determine a maximum codebook for uplink transmission, reducing power back-off and thereby minimizing power loss in uplink power amplifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the downlink codebook is used directly as the uplink codebook for pre-coding, then the uplink pre-coding function is provided, but the power loss of the power amplifier increases
Solution Approach 1:
The patent changes the parameters of the codebook by introducing a new uplink codebook structure with specific matrix forms (Equation 1) and constraints (|α|=1, |β|=1, |γ|=1). This new codebook design with modified parameters reduces the power back-off requirement of the power amplifier compared to using the downlink codebook directly, thereby reducing power loss while maintaining the uplink pre-coding function.
2Loss of energy
If a new uplink codebook is designed with specific matrix structures and constraints, then the power loss of the power amplifier is reduced, but the complexity of codebook design and selection increases
Solution Approach 1:
The patent segments the codebook design into specific matrix structures with defined elements (α, β, γ) and constraints. By dividing the codebook into structured matrices with specific properties, the design complexity is managed through modular construction while achieving the goal of reducing power amplifier power loss through optimized codebook structures.
Data Source
AI summary
A codebook, a codebook creating method, and an uplink transmission method and equipment based on the codebook are provided. A new codebook is put forward in the method. The codebook includes one or any combination of the following elements:12[101/2α0-α/201γ/20β-βγ/2],12[101/201γ2α0-α/20β-βγ/2],and12[101/201γ/20β-βγ/2α0-α/2],where |α|=1,|β|=1,|γ|=1.