Radio Channel Response Estimation With TX/RX Compensation Separation
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Solution Overview
Problem
Existing radio channel estimation methods fail to accurately account for the difference between the response of the transmitter and receiver circuitry, leading to suboptimal pre-compensation of signals in radio communications.
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 improving signal transmission independence from the specific apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the radio channel estimation is performed using conventional methods, then the estimation process is simple, but the accuracy of the channel response estimation is insufficient because it does not account for transmitter and receiver circuitry differences
Solution Approach 1:
The patent introduces an intermediary calibration signal that is transmitted through the radio channel and received by the receiver. This calibration signal serves as a mediator to separately measure the transmitter circuitry response and receiver circuitry response, allowing the actual channel response to be isolated and estimated more accurately without directly mixing these components in the conventional estimation process
Solution Approach 2:
The patent segments the overall radio communication system into distinct components: transmitter circuitry, radio channel, and receiver circuitry. By using calibration signals, each component's response is measured separately, allowing the channel response to be extracted independently from the circuitry responses, thereby improving estimation accuracy while maintaining manageable complexity
2Reliability
If pre-compensation is applied without accounting for circuitry differences, then the signal processing is straightforward, but the pre-compensation accuracy is suboptimal leading to degraded reception quality
Solution Approach 1:
The patent performs preliminary calibration measurements of the transmitter and receiver circuitry responses before actual data transmission. These preliminary measurements enable the calculation of compensation factors that are applied in advance to the transmitted signals, ensuring that the pre-compensation is optimized for the specific apparatus being used, thereby improving reception quality without adding complexity during the actual data transmission phase
Data Source
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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.