Transmitting Apparatus Peak Power Suppression via Segmented DFT Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current single carrier (SC) transmission systems face challenges in further reducing transmission peak power to enhance power efficiency in multipath fading environments.
Innovation Solution
A transmitting apparatus that divides data into multiple blocks, applies Fourier transforms, and uses control processing units with selected control values to minimize transmission peak power, combining signals through inverse Fourier transforms and transmitting them with optimized control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional SC transmission with DFT processing is used, then transmission peak power is suppressed to some extent, but further power reduction is needed for improved power efficiency
Solution Approach 1:
The data block is divided into M divided data blocks, and each block is processed independently through Fourier transform and control processing. This segmentation allows for more granular control of peak power across different data segments, enabling further suppression of overall transmission peak power beyond what conventional single-block DFT processing achieves.
Solution Approach 2:
The invention applies control processing to adjust parameters of the transformed data, specifically modifying phase and amplitude characteristics through control values. By changing these parameters optimally for each divided block and combining them, the system achieves lower peak power while maintaining transmission quality.
2Power
If multiple control value candidates are evaluated to minimize peak power, then transmission power is reduced, but computational complexity increases
Solution Approach 1:
By dividing the data into M blocks and processing each block separately through the candidate evaluation process, the computational complexity is distributed across multiple smaller, independent processing units. This segmentation makes the overall complex computation more manageable and implementable in practical systems.
Solution Approach 2:
The system evaluates a predetermined number of control value candidates (not necessarily all possible candidates) to find sufficiently optimal solutions. This partial evaluation approach achieves adequate peak power reduction without requiring exhaustive computation of all possible control value combinations, balancing performance with computational feasibility.
Data Source
AI summary
A transmitting apparatus includes a group processing unit configured to divide plurally data of one block, control processing units configured to perform predetermined control processing for each of the divided data, a combination processing unit configured to combine the data subjected to the control processing into one signal, a transmission processing unit configured to apply predetermined transmission processing to the combined signal to convert the signal into a transmission signal, and a control-signal generating unit configured to retain a predetermined number of control value candidates, one set of which includes M control values used in the control processing carried out by the control processing units, and select, as a selected candidate, one of the control value candidates based on power information of the transmission signal, and generate M control signals corresponding to the selected candidate and input the control signals to the control processing units.