Multicarrier Signal Feedback via Frequency Vector Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current transmission systems requiring knowledge of the transmission channel for efficient data transmission face challenges in reducing the quantity of feedback information, leading to increased probing phase duration and decreased system efficiency, especially with increasing numbers of antennas, carriers, and users.
Innovation Solution
A method that fragments channel information in the frequency domain and transforms it into a transformed domain for transmission, reducing the amount of information and computational complexity by distributing frequency samples into vectors and applying Fourier or cosine transforms, allowing for efficient compression and noise averaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If explicit feedback mode is used to transmit channel information, then transmission rate is improved, but probing phase duration increases
Solution Approach 1:
The patent divides the channel frequency response into multiple frequency sample vectors, each containing a subset of frequency samples. This segmentation allows the feedback information to be divided into smaller manageable parts, reducing the overall feedback overhead and probing phase duration while maintaining transmission performance.
Solution Approach 2:
The patent extracts only the necessary frequency samples from the complete channel frequency response to form the frequency sample vectors. By selecting and transmitting only the most relevant channel information, the feedback quantity is reduced while preserving the essential channel characteristics needed for effective transmission.
2Productivity
If number of antennas, carriers, and users increases, then transmission capacity is improved, but feedback information quantity increases
Solution Approach 1:
The patent segments the large set of frequency samples into multiple smaller frequency sample vectors, making the feedback information more manageable. This segmentation approach allows the system to handle increased numbers of antennas, carriers, and users without proportionally increasing feedback overhead, as each vector can be processed independently.
Solution Approach 2:
The patent transforms the feedback problem from a single-dimensional complete frequency response into a multi-dimensional structure with multiple frequency sample vectors. This dimensional change allows for more efficient processing and transmission of feedback information, reducing the overall quantity required while maintaining system capacity.
3Measurement precision
If complete frequency response is transmitted, then channel estimation accuracy is improved, but computational complexity increases
Solution Approach 1:
The patent extracts essential frequency samples from the complete frequency response to form frequency sample vectors. By selecting only the most critical frequency components, the system maintains adequate channel estimation accuracy while significantly reducing the computational complexity of processing and transmitting the feedback information.
Solution Approach 2:
The patent divides the complete frequency response into multiple smaller frequency sample vectors, reducing the computational burden on each processing unit. This segmentation allows parallel processing of multiple smaller vectors rather than one large vector, thereby reducing overall computational complexity while preserving channel estimation accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces the quantity of information transmitted and computational complexity, enhancing the efficiency of channel estimation and overall transmission system performance by minimizing the probing phase duration.
Implementation Method 1
a step of transforming the frequency sample vectors from the frequency domain to a transformed domain, delivering, for at least one frequency sample vector, a partial response of the channel in the transformed domain
Implementation Method 2
using a specific transfer function based for example on a cosine transform to convert the channel response from the frequency domain to the transformed domain
Data Source
Figure 1~3A
Figure 3B~4
Figure 5A~5B
AI summary
The invention relates to a method of receiving a signal corresponding to a multicarrier signal sent via at least one transmission channel, comprising a step (11) of estimating said channel, delivering a global item of information regarding said channel in the frequency domain, termed the frequency response, comprising frequency samples. According to the invention, such a method also comprises: - a step of distributing (12) said frequency samples into at least two vectors of frequency samples; - a step (13) of transforming said vectors of frequency samples from the frequency domain to a transformed domain, delivering, for at least one vector of frequency samples, a partial response of said channel in said transformed domain; - a step (14) of transmitting, to the sender, a return signal carrying at least some samples representative of said channel in said transformed domain, extracted from said partial responses.