Dynamic Receiver Tuning for Wideband Anti-Jam Modems
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Solution Overview
Problem
Existing wideband anti-jam modems (WAMs) face limitations in efficiently integrating multiple channels for communication between Navy vessels and land stations over satellite links, as they are restricted by the number of receivers, limiting the number of vessels that can communicate directly.
Innovation Solution
The method involves dynamically tuning receivers across multiple channels, allowing each WAM to cyclically scan through all channels except its assigned transmit channel, and assigning specific receivers to receive packets on designated channels upon request, enabling more WAMs to communicate directly and efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple receivers are used to increase the number of channels that can be received simultaneously, then the number of vessels that can communicate directly increases, but the device complexity and cost increase
Solution Approach 1:
The receiver is made dynamically tunable across multiple channels rather than being fixed to a single channel. The receiver cyclically scans through multiple channels and can be dynamically assigned to specific channels when packets need to be received, allowing one receiver to serve multiple channel functions over time.
Solution Approach 2:
The receiver performs periodic cyclic scanning through multiple channels. By tuning the receiver to different channels in a cyclic manner, the system allows more WAMs to communicate than the number of physical receivers, as packets can be transmitted during periods when the receiver is tuned to the appropriate channel.
2Reliability
If each WAM is assigned a dedicated transmit channel, then interference between transmitters is reduced, but the number of channels required increases beyond the number of available receivers
Solution Approach 1:
While transmitters remain fixed to their assigned channels for reliable communication, receivers are made dynamically tunable to scan across multiple channels. This dynamic receiver capability allows the system to support more channels than physical receivers by time-multiplexing receiver access to different channels.
Solution Approach 2:
The system allows WAMs to autonomously request channel assignments and the receiver to autonomously tune to the appropriate channel when packet reception is needed. The cyclic scanning mechanism automatically manages channel access without requiring additional hardware resources.
Data Source
AI summary
Embodiments for a method of dynamically tuning receivers of a wideband anti-jam modem (WAM) are provided. The method includes cyclically tuning one or more receivers through a plurality of channels except a first channel. The method also includes receiving an indication, while cyclically tuning, that one or more packets to an endpoint device behind a first WAM are to be sent to the first WAM on a second channel of the plurality of channels. In response to receiving the indication, the cyclical tuning for a first receiver of the plurality of receivers is halted and the first receiver is tuned to the second channel for a first period of time to receive the one or more messages. After the first period of time, cyclically tuning the first receiver along with any other receivers of the one or more receivers through the plurality of channels except the first channel.