Parallel Downlink Signal Modulation via Feed-Forward Processing

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Solution Overview

Problem

Current communication systems require large ground stations and extensive electronics to process satellite communication signals, which is resource-intensive and inefficient, especially due to bottlenecks caused by feedback loops in processing algorithms like PLLs and DLLs.

Innovation Solution

Implementing high-rate signal processing using general-purpose processors with techniques such as parallel processing across multiple cores, SIMD operations, feed-forward processing, and pre-calculation of metadata to distribute processing loads and reduce memory bandwidth utilization, allowing for efficient modulation and waveform generation of downlink signals without dedicated signal processing hardware.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If feedback loops (PLL, DLL) are used in signal processing, then signal synchronization and locking are achieved, but processing bottlenecks occur and throughput decreases

Engineering Contradiction:

Improvesignal synchronizationVSAvoidprocessing throughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent inverts the traditional feedback loop approach by using feed-forward processing blocks that calculate error states and apply corrections in a forward manner rather than continuously looping back. This allows parallel processing of multiple data blocks simultaneously, eliminating the bottleneck caused by sequential feedback processing while maintaining signal synchronization through pre-calculated error corrections.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent segments the signal processing into multiple independent processing blocks that can operate in parallel. Instead of a single sequential feedback loop, the system divides processing into separate blocks that handle different aspects of signal correction independently, allowing concurrent execution and improved throughput while maintaining synchronization accuracy.

Inventive Principle:

Principle #1Segmentation

2Reliability

If extensive antenna arrays and dedicated signal processing hardware are used, then satellite communication signal reception and processing quality are improved, but system complexity and resource requirements increase

Engineering Contradiction:

Improvesignal processing qualityVSAvoidground station infrastructure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent employs general-purpose processors that can perform multiple functions including signal reception, processing, and correction without requiring dedicated hardware for each function. The same processor infrastructure handles various signal processing tasks through software-based algorithms, reducing the need for specialized equipment while maintaining processing quality.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent replaces dedicated hardware signal processing systems with software-based processing on general-purpose processors. Instead of using specialized electronic circuits for each processing function, the system uses programmable software algorithms that can be configured and adjusted without hardware changes, simplifying the overall system architecture.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If multiple CPU cores are used for parallel processing, then processing throughput increases, but data sharing complexity and memory bandwidth utilization increase

Engineering Contradiction:

Improveprocessing throughputVSAvoiddata sharing management

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments data processing into distinct processing blocks that operate independently on separate data blocks. Each CPU core processes its own segment without requiring frequent data sharing or synchronization with other cores, reducing the complexity of inter-core communication while maintaining high throughput through parallel execution.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12261687B2Systems and methods for signal modulation of a plurality of downlink signal representative of a communication signal

Publication Date: 2025.03.25 KRATOS INTEGRAL HOLDINGS LLC

AI summary

Embodiments of systems and methods for modulating a downlink signals representative of a communication signal are provided herein. An example method comprises receiving an input signal; in a first one or more processing blocks in a one or more processors, performing a first modulation operation on first data packets of the input signal based on a modulation scheme for a receiver of the downlink signal; in a second one or more processing blocks in the one or more processors in parallel with the first one or more processing blocks, performing a second modulation operation on second data packets of the input signal based on the modulation scheme; and generating a waveform as the downlink signal based on performing the first and second modulation operations.