Orthogonal Polarization Identification via Spread Spectrum Coding
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Solution Overview
Problem
Improperly pointed antennas in telecommunication systems, particularly in satellite communications, lead to interference due to incorrect azimuth, elevation, and polarization settings, often resulting from human error or environmental factors, causing service disruptions.
Innovation Solution
A method and system that utilize spread spectrum technology to encode and modulate data streams onto orthogonal electromagnetic polarizations, allowing for the identification and optimization of antenna pointing and polarization by distinguishing between different spreading characteristics, enabling precise alignment and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional antenna systems are used without spread spectrum coding, then the system structure is simpler, but the ability to distinguish and identify orthogonal polarization signals is insufficient leading to interference
Solution Approach 1:
The patent applies spread spectrum coding by modulating carrier signals with unique pseudorandom code sequences, transforming the signals in the time domain. This parameter change enables precise distinction between orthogonal polarization signals through code correlation, resolving the contradiction between measurement precision and device complexity.
2Reliability
If manual antenna configuration is used, then the setup process is simpler, but human error leads to improper pointing and polarization settings causing service disruptions
Solution Approach 1:
The system performs self-identification and self-alignment by automatically detecting and correlating spread spectrum codes from incoming signals. The receiving equipment autonomously determines the correct polarization and alignment without manual intervention, eliminating human error while maintaining ease of operation through automated procedures.
Solution Approach 2:
The patent implements feedback mechanisms where the received spread spectrum signals provide information about polarization and alignment status. The system uses correlation results to feedback and adjust the antenna configuration, ensuring reliable service continuity while simplifying operation through automated closed-loop control.
3Productivity
If orthogonal polarization signals are transmitted without unique spreading codes, then the transmission system is simpler, but interference between polarizations occurs reducing service quality
Solution Approach 1:
The patent segments the spectral resource by assigning unique pseudorandom code sequences to different orthogonal polarization signals. This code-based segmentation allows multiple signals to occupy the same frequency band simultaneously without interference, achieving high spectral efficiency while eliminating polarization interference through orthogonal code properties.
Data Source
AI summary
A method of and system for distinguishing polarizations and information about the carrier signals transmitted from a repeating relay comprising encoding, using an encoder, a first data stream and a second data stream at a repeating relay, modulating, using a modulator, the first and second encoded data streams at the repeating relay, spreading, using a spreader, the first modulated data stream such that a first spread waveform results having first spreading characteristics and the second modulated data stream such that a second spread waveform results having second spreading characteristics, wherein the first spreading characteristics and the second spreading characteristics are different and differentiate the first spread waveform from the second spread waveform, and transmitting the first spread waveform as a first spread spectrum carrier signal on a first electromagnetic polarization and the second spread waveform as a second spread spectrum carrier signal on a second EM polarization.