Radio Channel Response Estimation for Circuit-Aware Pre-Compensation
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Solution Overview
Problem
Existing radio channel estimation methods fail to accurately account for the differences in response between transmitter and receiver circuitry, leading to inefficiencies in pre-compensation of transmitted signals.
Innovation Solution
The apparatus estimates the radio channel response by incorporating the transfer functions of both transmitter and receiver circuitry, allowing for pre-compensation that accounts for these differences, thereby ensuring signal independence from the specific apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radio channel estimation is performed at the receiver based on received signal, then the estimation includes response of transmitter circuitry and receiver circuitry in addition to radio channel response, but the accuracy of radio channel estimation deteriorates due to contamination by circuitry responses
Solution Approach 1:
The patent segments the total received signal into three distinct components: transmitter circuitry response, radio channel response, and receiver circuitry response. By separately identifying and processing each component, the method isolates the pure channel response from contaminating circuitry effects, thereby improving estimation accuracy while maintaining information integrity.
Solution Approach 2:
The patent extracts the pure radio channel response from the composite signal by removing or compensating for the transmitter and receiver circuitry responses. This extraction process isolates the desired channel information from unwanted circuitry artifacts, directly addressing the contradiction between measurement precision and information purity.
2Reliability
If pre-compensation is applied using estimated channel response, then reception quality improves, but the pre-compensation accuracy deteriorates when circuitry responses are not accounted for
Solution Approach 1:
The patent implements a feedback mechanism where the receiver estimates the channel response (including circuitry effects), communicates this information back to the transmitter, and the transmitter uses this feedback to adjust its pre-compensation. By incorporating circuitry response characteristics into the feedback loop, the system achieves more accurate pre-compensation that accounts for actual signal path conditions, improving both pre-compensation accuracy and reception quality.
Solution Approach 2:
The patent applies pre-compensation at the transmitter before signal transmission, using estimated channel and circuitry response characteristics to pre-adjust the signal. This preliminary action counteracts anticipated channel effects and circuitry distortions before they occur, ensuring more accurate reception without requiring real-time adjustments during transmission.
3Productivity
If the estimated channel response is used for pre-compensation in the opposite direction, then signal transmission is improved, but the transmitted signal becomes dependent on the particular apparatus characteristics
Solution Approach 1:
The patent applies different compensation characteristics to different parts of the transmission system. Specifically, it accounts for the distinct response characteristics of transmitter circuitry versus receiver circuitry by applying appropriate compensation at each end. This local quality approach ensures that pre-compensation is optimized for the specific transmission path while maintaining signal independence from particular apparatus characteristics through proper calibration.
Solution Approach 2:
The patent changes key parameters of the transmitted signal based on estimated channel and circuitry responses, including amplitude, phase, and timing characteristics. By dynamically adjusting these parameters according to the specific transmission conditions and circuitry characteristics, the system improves transmission efficiency while compensating for apparatus-specific variations to maintain signal independence.
Data Source
AI summary
An apparatus comprising:means for using a signal transmitted by first transmitter circuitry that is coupled, within the apparatus, to and received by first receiver circuitry and a signal transmitted by the first transmitter circuitry that is coupled, within the apparatus, to and received by second receiver circuitry to determine different reception compensation for application to a signal received at the first receiver circuitry and to a signal received at the second receiver circuitry;means for using a signal transmitted by the first transmitter circuitry that is coupled, within the apparatus, to and received by the first receiver circuitry and a signal transmitted by second transmitter circuitry that is coupled, within the apparatus, to and received by the first receiver circuitry to determine the different transmission compensation for application to a signal transmitted by the first transmitter circuitry and to a signal transmitted by the second transmitter circuitry.