Transmission System Interference Avoidance via Zero Data Replacement
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Solution Overview
Problem
Existing wireless transmission systems face interference issues due to spectrum overlap between Ultra Wide Band (UWB) and WiMAX protocols, particularly in the 3.6 GHz frequency band, where current Active Interference Cancellation technologies like notch filters only achieve limited interference avoidance of approximately 30 dB.
Innovation Solution
A transmission system with an interference-processing module that adds extension data to increase resolution, allowing for precise replacement of data corresponding to interfered bands with zero data, thereby enhancing interference avoidance capabilities by converting data through inverse and fast Fourier transforms and transmitting as radio-frequency signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If notch filter technology is used for interference avoidance, then implementation is simple, but interference avoidance capability is limited to approximately 30 dB
Solution Approach 1:
The patent changes the data resolution parameter by adding extension data to increase the number of frequency bins in OFDM signaling. This parameter change enables more precise identification and avoidance of interfered bands, achieving over 42 dB interference avoidance capability while maintaining implementation feasibility through standard signal processing operations.
2Productivity
If spectrum overlap is ignored, then transmission is straightforward, but signal interference occurs in overlapping frequency bands
Solution Approach 1:
The patent performs preliminary action by adding extension data before OFDM modulation to pre-calculate the frequency domain representation. This allows the system to identify interfered bands in advance and replace corresponding data with zero data before transmission, preventing signal interference while maintaining transmission efficiency without requiring real-time interference detection and correction.
3Measurement precision
If data resolution is increased by adding extension data, then interference avoidance precision is improved, but data processing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the frequency spectrum into more fine-grained bins through the addition of extension data. This segmentation increases the resolution of frequency domain representation, allowing precise identification of specific interfered bands. The increased precision is achieved by segmenting the spectrum into smaller frequency intervals, enabling targeted interference avoidance without unnecessarily processing entire bands.
Data Source
AI summary
The present invention relates to a transmission system with interference avoidance capability, which includes a transmission apparatus and a receiving apparatus. The transmission method thereof receives first data by means of an interference-processing module of the transmission apparatus and adds a plurality of extension data to the first data to produce second data for replacing a plurality of data corresponding to an interfered band in the second data with zero data, and then producing transmission data. The transmission data is converted to a radio-frequency signal by a transmission-processing module and transmitted to the receiving apparatus. Thereby, signal interference can be prevented by avoiding spectrum overlap regions.