Adaptive Terminal Filtering for Satellite and Terrestrial Interference
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Solution Overview
Problem
Communication terminals face challenges in efficiently managing interference between satellite and terrestrial communications, particularly in high-interference environments, leading to increased power consumption and reduced battery life.
Innovation Solution
A communication terminal with adaptive interference cancellation capabilities, utilizing a filter and amplifier control circuitry to dynamically adjust to interference levels, reducing power consumption by only activating interference cancellation modes when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the receiver is designed with high dynamic range to handle high levels of in-band interference in terrestrial systems, then the ability to operate in high-interference environments is improved, but power consumption increases
Solution Approach 1:
The receiver dynamically adjusts its operating mode between low-power mode (for satellite communications with weak signals) and high-power mode (for terrestrial communications with strong interferers). The system transitions between these modes based on detected interference levels, allowing the receiver to maintain high dynamic range capability when needed while consuming minimal power when interference is absent.
Solution Approach 2:
The receiver changes its operational parameters (gain settings, filter characteristics, amplifier bias currents) based on the detected interference environment. When terrestrial interference is detected, the receiver switches to parameters optimized for high dynamic range operation. When only satellite signals are present, the receiver uses parameters optimized for low-power operation with adequate sensitivity.
2Reliability
If the receiver maintains high dynamic range capability continuously to handle terrestrial interference, then interference rejection is improved, but battery life decreases
Solution Approach 1:
The receiver periodically monitors the interference environment and transitions between high-power and low-power operating modes based on detected conditions. Rather than maintaining high dynamic range capability continuously, the system activates this capability only periodically when terrestrial interference is detected, thereby extending battery life while maintaining interference rejection capability when needed.
Solution Approach 2:
The receiver autonomously detects interference levels and self-adjusts its operating mode without external intervention. The system uses its own received signals to determine when high dynamic range operation is necessary, eliminating the need for external control and enabling intelligent power management that extends battery life.
3Device complexity
If the receiver uses a single receiver for both satellite and terrestrial communications, then cost and size are reduced, but the ability to handle high interference in terrestrial systems deteriorates
Solution Approach 1:
The receiver is designed as a universal device capable of handling both satellite and terrestrial communications using the same hardware platform. By implementing adaptive operating modes that can switch between low-power satellite reception and high-power terrestrial reception, the single receiver achieves multi-functionality without requiring separate dedicated receivers for each communication type.
Solution Approach 2:
The receiver dynamically adapts its characteristics to match the requirements of different communication environments. When operating in terrestrial mode with strong interferers, the receiver activates high-power amplification and interference cancellation circuits. When operating in satellite mode with weak signals, the receiver switches to low-power operation, thereby maintaining versatility while managing power consumption.
Data Source
AI summary
Communication terminals configured for satellite and terrestrial communications and methods of use are disclosed herein. In an embodiment, a communication terminal includes an antenna, a filter, conversion circuitry, processing circuitry and filter control circuitry. The antenna is configured to receive a radio signal. The filter is configured to filter the radio signal to remove interference. The conversion circuitry is configured to downconvert the filtered radio signal from the filter for further processing. The processing circuitry is configured to process the downconverted radio signal from the conversion circuitry using at least one of a demodulator, an analog-to-digital converter or a digital signal processor. The filter control circuitry is configured to (i) detect interference in the radio signal after the radio signal has passed the filter but before the radio signal has been processed by a mixer, and (ii) cause an adjustment to the filter based on the detected interference.