Router Re-sequencing Memory for Agile Frequency Allocation
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Solution Overview
Problem
Current digital up-converter systems lack agility in efficiently up-converting multiple narrowband channels to various frequency slots within a wideband output frequency range, limiting their ability to dynamically allocate frequencies without disrupting other channels.
Innovation Solution
A system comprising a router with a re-sequencing memory module and multiple digital up converters (DUCs), where the router receives narrowband channel samples from generators and re-sequences them according to an output order responsive to frequency allocation, allowing concurrent and flexible frequency allocation across multiple DUC inputs using time division multiplexing (TDM).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple narrowband channels are up-converted to different frequency slots within a wideband output range, then frequency allocation flexibility is improved, but system complexity increases due to the need for re-sequencing memory modules and routing circuits
Solution Approach 1:
The system divides the wideband output into multiple frequency slots and uses separate DUC inputs (first DUC input, second DUC input) to handle different frequency ranges. The re-sequencing memory module segments the narrowband channel samples and routes them to appropriate DUC inputs based on frequency allocation, enabling flexible frequency assignment without requiring a completely different system architecture for each channel.
Solution Approach 2:
The routing circuit dynamically allocates frequency slots to narrowband channels based on real-time requirements. The re-sequencing memory module can reorder samples and the routing circuit can direct them to different DUC inputs depending on the current frequency allocation plan, allowing the system to adapt flexibly to changing frequency requirements without hardware reconfiguration.
2Adaptability or versatility
If frequency allocation changes are made dynamically, then adaptability is improved, but disruption to other channels occurs
Solution Approach 1:
The re-sequencing memory module预先 stores and buffers narrowband channel samples before they are routed to DUC inputs. This buffering capability allows the system to prepare samples in advance and retrieve them in the correct sequence even when frequency allocation changes occur, preventing disruption to ongoing channel transmissions while enabling dynamic reconfiguration.
Solution Approach 2:
The routing circuit acts as an intermediary between the narrowband generators and the DUC inputs. It receives samples from multiple generators, determines the correct frequency slot allocation, and routes samples to appropriate DUC inputs through the re-sequencing memory module. This intermediary function isolates the frequency allocation logic from the actual channel transmission, allowing dynamic changes without disrupting other channels.
3Productivity
If multiple channels are processed concurrently, then productivity is improved, but hardware resource requirements increase
Solution Approach 1:
The DUC inputs are designed to handle multiple narrowband channels sequentially through time division multiplexing. Each DUC input can process different channels at different time slots, making the hardware resources universal and multi-functional. The re-sequencing memory module enables this by buffering and ordering samples so that multiple channels can share the same DUC input hardware resources efficiently, improving productivity without requiring separate dedicated hardware for each channel.
Data Source
AI summary
A device that may include a router and may also include narrowband generators arranged to generate samples of narrowband channels, a digital up converter (DUC). The DUC may include multiple DUC inputs. Different DUC inputs are associated with different frequency ranges. The router may include multiple router inputs, multiple router outputs and a routing circuit. The multiple router outputs are coupled to the multiple DUC inputs. The multiple router inputs are coupled to the narrowband generators. The routing circuit may include a re-sequencing memory module that is arranged to receive the samples of narrowband channels from the narrowband generator according to an input order and to output the samples of the narrowband channels to the multiple router outputs according to an output order that is responsive to an allocation of frequencies to the samples of the narrowband channels.