Wireless Receiver Symbol Weighting for Interference Mitigation
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Solution Overview
Problem
Wireless communication systems face performance degradation due to high interference fluctuations across transmission symbols, which existing technologies have not effectively addressed, leading to inefficient data transmission and reception.
Innovation Solution
The solution involves applying different weights to portions of a transmission symbol based on interference power levels, allowing the receiver to prioritize portions with less interference and de-emphasizing those with more interference, and the transmitter can send duplicate signal components to avoid interfering periods, ensuring better signal recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiver processes the entire transmission symbol, then more signal data is available for decoding, but performance degrades due to high interference in certain portions of the symbol
Solution Approach 1:
The transmission symbol is divided into multiple portions based on interference power levels. The receiver identifies high interference portions and processes only the low interference portions, effectively segmenting the symbol to avoid harmful interference while maintaining signal recovery capability.
Solution Approach 2:
Different portions of the transmission symbol are treated differently based on their local interference characteristics. Low interference portions are processed with standard weighting, while high interference portions are either down-weighted or excluded from processing, applying local quality adjustment to mitigate interference impact.
2Reliability
If the transmitter sends duplicate signal components to avoid interfering periods, then signal recovery is improved, but transmission time and resource usage increase
Solution Approach 1:
The transmitter sends duplicate signal components at periodic intervals within the transmission symbol. These periodic repetitions allow the receiver to select the best copy from non-interfering portions, improving reliability without requiring significantly extended transmission time.
Solution Approach 2:
The transmitter creates duplicate copies of signal components and transmits them in different time positions within the symbol. The receiver selects the copy from the portion with lowest interference, using the copying mechanism to overcome interference without retransmission.
3Reliability
If the receiver applies different weights to different portions of the transmission symbol, then the impact of interference is reduced, but processing complexity increases
Solution Approach 1:
The receiver performs preliminary interference power level detection and portion identification before applying weights. By pre-identifying high and low interference portions, the weighting process becomes a straightforward multiplication operation rather than a complex optimization problem, reducing overall processing complexity.
Solution Approach 2:
The receiver changes the weight parameter for different portions of the transmission symbol based on interference power levels. This simple parameter adjustment (weighting) provides interference mitigation with minimal computational complexity, avoiding more complex signal processing techniques.
Data Source
AI summary
Techniques for addressing high interference observed by a receiver in a wireless communication system are disclosed. The receiver may observe different interference power levels across a transmission symbol. In an aspect, the receiver applies different weights to different portions of the transmission symbol to account for fluctuation of interference power across the transmission symbol. In another aspect, a transmitter may send a transmission symbol such that a receiver can ignore a portion of a symbol period with high interference. In one design, the transmitter generates a transmission symbol including at least two copies of a signal component. The transmitter transmits at least one copy of the signal component in a portion of the symbol period in which the receiver does not observe high interference. The receiver processes the at least one copy of the signal component to recover data sent in the transmission symbol.