Aerospace, Military and Defence
Figure 6. Tomorrow’s spectral scanning covering the gap between Nyquist 1 and Nyquist 2.
and direct RF sample radar and digital beamforming take off. ● Extensive on-chip programmable digital signal processing (DSP) features to process the high speed wideband data stm. 4,5The downstream FPGA responsible for processing the digital converter data payload is the worst size, power, and cost bottleneck in the system. Implementing diverse, flexible DSP on the data converter chip is more power efficient and frees up external FPGA resources for higher level mission-specific algorithms or allows a smaller, cheaper, cooler class of FPGA. To illustrate the frequency planning advantage, Figure 6 shows an EW scheme providing continuous spectral coverage up to 44 GHz with the ADC clocked at 18
GSPS. First Nyquist RF direct sampling covers low frequency—8 GHz. The Nyquist gap is at 8 GHz to 10 GHz, and second Nyquist RF direct sampling covers 10 GHz to 16 GHz. The RF tuner covers the Nyquist gap plus band overlap by flipping 7 GHz to 11 GHz to an IF at 2 GHz to 6 GHz. A tunable band-pass is required at the input to the frequency mixer. The LPF rejects the image, and the HPF rejects IF feedthrough. Another advantage in using the RF tuner is added flexibility. It is possible that the ADC has degraded noise and linearity the higher you try to direct sample, or you may prefer certain ADC frequency zones that are free of HD2 and/or HD3. If better performance can be attained using the RF tuner vs. direct RF sampling, a run-time
software decision can toggle modes on- the-fly.
What size advantage can we expect to realize going to tomorrow’s receiver front end? We estimate the typical receiver RF chain goes from the size of a business card today to a postage stamp tomorrow. This is a 90 pe cent% reduction in size.
Conclusion
As ADI’s high speed data converter Nyquist sample rate and iBW push higher while maintaining leading dynamic range, frequency planning benefits allow converged, simplified RF front-end architectures. In the past, high performance integrated frequency translation ICs employing suboctave RF filtering and gain control were hard to nail down because
everybody’s use case, frequency plan, and resulting RF/IF filtering were different. Things are about to change drastically. New monolithic radio tuners will be natively wideband with on-chip adaptive RF filtering capability and AGC. The vast, fragmented application realm of wideband tuning will converge to common hardware blocks within application-specific adaptive software loops. The system developer realizes time to market and cost benefits as application-specific advantage shifts away from unique hardware toward differentiated software algorithms on common flexible hardware platforms. All this at shrinking SWaP-C.
https://www.analog.g.com.
RTI announces first transport services with FACE 3.1 conformance certification and DO-178C DAL A Safety evidence
R
eal-Time Innovations (RTI), the software framework company for autonomous systems, has announced that RTI Connext TSS has achieved, what is said to be, two industry firsts. According to RTI, it is the first Transport Services Segment (TSS) to receive conformance certification to the Future Airborne Capability Environment (FACE) Technical Standard, Edition 3.1, and it is the first TSS available with RTCA DO- 178C Design Assurance Level (DAL) A Safety certification evidence. Connext TSS delivers a standards-compliant software framework that accelerates the development of modular, open and safety-critical avionics systems. The RTI Connext TSS software framework is designed to meet the demanding requirements of data-centric, mission-critical and safety-critical systems. These systems require sharing data in real-time across multiple networks and multiple safety levels, as well as with other system components from different suppliers and operational entities. These critical systems have traditionally required custom, proprietary, single platform
18 March 2023
integration approaches that are not optimized for scalability, evolvability or ease of integration.
“The U.S. Army PEO Aviation congratulates RTI on their successful FACE conformance certification for FACE TSS,” said Mark Chess, CIO Office, U.S. Army PEO Aviation and elected chair of the FACE Consortium. “RTI’s commitment to the FACE Consortium and its expertise in a wide range of hardware and software platforms removes both program cost and risk for delivering best-in-class solutions for next-generation military platforms.” Connext TSS 3.1 FACE conformance and DO-178C certification evidence was created on top of the DDC-I Deos safety RTOS executing on the North Atlantic Industries, Inc. (NAII) 68PPC2 T2080 board. All parties have completed the development of DO- 178C DAL A certification evidence for this solution stack. Together, this integrated FACE and DO-178C solution stack with DDC-I, NAII, and RTI provides an immediate commercial foundation for building next generation avionics systems, while reducing both program cost and risk.
Components in Electronics
Source: iStock
“Connext TSS is a critical component of any next generation avionics system,” said Chip Downing, senior market director of aerospace & defence at RTI. “Connext TSS coupled with our diverse partner ecosystem accelerates integration while delivering proven real-time performance, scalability and robustness using data- centric, standards-based technologies. It is the obvious choice for platforms requiring
both FACE conformance and RTCA DO-178C safety certification.”
RTI remains committed to supporting the FACE ecosystem and leading avionics platforms, ensuring the continuation of additional certifications with FACE 3.1 conformant OSS suppliers, processors and/or board environments.
www.rti.com
www.cieonline.co.uk
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