Transceiver Frequency Shift for Non-Contiguous Band Transmission
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Solution Overview
Problem
Conventional satellite communications systems face difficulties in transmitting and receiving broadband information, especially when only non-contiguous narrowband frequency bands are available, which are insufficient to carry the entire broadband data.
Innovation Solution
The use of transceivers configured to selectively frequency shift and transmit/receive broadband information over multiple non-contiguous narrowband frequency bands, with components like modulators, frequency translators, and converters to reposition frequency-domain components into available narrowband segments, allowing for the transmission and reception of broadband data even when only non-contiguous bands are allocated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional transceivers use a single contiguous frequency band, then the system is simple to operate, but the bandwidth is insufficient to carry broadband information when only non-contiguous narrowband segments are allocated
Solution Approach 1:
The transceiver segments the broadband information signal into multiple narrowband frequency components that can be transmitted over separate non-contiguous frequency bands. Each segment is processed independently through its own modulation and transmission path, then recombined at the receiver to reconstruct the original broadband signal.
Solution Approach 2:
The system transitions from operating in a single frequency dimension to operating across multiple frequency dimensions simultaneously. By utilizing multiple non-contiguous frequency bands rather than a single contiguous band, the transceiver effectively adds the frequency dimension as a new degree of freedom for transmitting broadband information.
2Adaptability or versatility
If the transceiver repositions frequency-domain components into multiple non-contiguous bands, then broadband transmission capability is enabled, but the device complexity increases due to additional modulators, frequency translators, and converters
Solution Approach 1:
The transceiver employs universal functional blocks (modulators, frequency translators, converters) that can handle multiple frequency bands and signal types. These multi-functional components are designed to operate across different frequency ranges and signal formats, reducing the need for separate dedicated hardware for each frequency band and thereby mitigating the increase in overall device complexity.
3Loss of information
If multiple non-contiguous frequency bands are used for transmission, then the information carrying capacity increases, but the difficulty of detecting and measuring signals increases
Solution Approach 1:
The receiver incorporates feedback mechanisms that monitor the received signals across all non-contiguous frequency bands and adjust the detection and reconstruction processes accordingly. This feedback enables the system to compensate for variations in signal strength, frequency offsets, and interference patterns across different bands, simplifying the overall detection and measurement process despite the complexity introduced by multiple bands.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the efficient transmission and reception of broadband information over non-contiguous narrowband frequency bands, overcoming the limitations of conventional systems by repositioning spectral components, thus facilitating high-speed broadband communication.
Implementation Method 1
a frequency translator that is configured to translate portions of the carrier frequency that is modulated with the broadband information into multiple non-contiguous carrier frequencies in a plurality of different frequency bands
Implementation Method 2
a modulator that is configured to modulate a carrier frequency with broadband information
Data Source
AI summary
Wireless communications transceivers include a transmitter that is configured to selectively frequency shift and transmit portions of broadband information over multiple non-contiguous narrowband frequency bands/segments, each of which is too narrow to carry the broadband information. A receiver also is configured to receive and selectively frequency shift portions of broadband information from multiple non-contiguous narrowband frequency bands/segments, each of which is too narrow to carry the second broadband information. Broadband information thereby may be transmitted and received in a regulated communications environment, even though a given provider may only be assigned discontinuous frequency bands/segments, none of which is wide enough to carry the entire broadband information.