Receiver SINR Estimation Using Non-Linear Detection Performance
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Solution Overview
Problem
In wireless communication systems, particularly in 3.9G networks, the complexity of calculating post-detection Signal to Interference and Noise Ratio (SINR) for advanced receivers makes it time-consuming and computationally challenging, and existing methods do not accurately reflect the performance of non-linear detection algorithms, necessitating a more efficient approach to determine signal quality.
Innovation Solution
An apparatus and method that perform non-linear detection on receive signals, estimating a first quality measure using a linear algorithm and adjusting it to reflect the performance of the non-linear detection algorithm, incorporating performance measures and interference types to derive a second quality measure, such as SINR, which can be communicated to adapt transmission parameters effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If post-detection SINR calculation is performed for advanced receivers, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent introduces an intermediary approach by using linear receiver SINR calculation as a base and applying performance correction factors to account for non-linear detection benefits. This avoids direct complex non-linear SINR calculation while still capturing its performance characteristics through the intermediary correction mechanism.
Solution Approach 2:
The patent changes the parameters of SINR estimation by introducing performance measures that adjust the basic linear receiver SINR. These performance measures modify the estimation parameters to reflect the actual performance of advanced receivers without requiring complex direct calculation.
2Measurement precision
If post-detection SINR calculation is performed for advanced receivers, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent performs preliminary action by calculating the basic linear receiver SINR first, which is computationally efficient. Then it applies performance correction factors based on pre-determined performance measures of non-linear detectors, avoiding the need for time-consuming direct non-linear SINR calculation.
Solution Approach 2:
The performance correction factors act as intermediaries that bridge the gap between simple linear SINR calculation and complex non-linear SINR performance, providing accurate estimates without the computational time penalty of direct non-linear calculation.
3Reliability
If non-linear detection is used, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent uses performance measures of non-linear detection as intermediaries to capture their reliability benefits without implementing the full complexity of non-linear detection algorithms for SINR calculation. The performance measures serve as simplified representations that preserve the reliability advantages.
Solution Approach 2:
The patent changes the approach from direct non-linear detection implementation to using performance-based parameter adjustments. By incorporating performance measures into the SINR estimation, it achieves the reliability benefits of non-linear detection through parameter modification rather than algorithmic complexity.
Data Source
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Figure 3
AI summary
An apparatus, including a detection unit configured to perform a non-linear detection on a receive signal, a first estimator configured to estimate a first quality measure based on the receive signal, and a second estimator configured to estimate a second quality measure dependent on the first quality measure and a performance measure of the detection unit is provided.