Search Results - ivan+djordjevic

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Quantum Receivers for Entanglement Assisted Communications and Sensing
Entanglement Assisted Communication (EACOMM) and quantum computing is the future for many different industries. The unique capabilities of being able to calculate some superposition of atoms between 0 and 1 is a huge asset for complex computing. While the channel capacity for EACOMM has been theoretically demonstrated, optimal quantum receivers have...
Published: 6/24/2022   |   Inventor(s): Ivan Djordjevic
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Category(s): Technology Classifications > Engineering & Physical Sciences > Communications & Networking > Wireless, Technology Classifications > Engineering & Physical Sciences > Communications & Networking > Optical, Technology Classifications > Engineering & Physical Sciences > Photonics
Entanglement Assisted Communication with Optical Phase Conjugation on Transmitter Side
Entanglement assisted (EA) communication has been advocated by numerous authors as a potential alternative to classical communications, in particular in noisy and low-brightness regime. This technology proposes an EA scheme employing the optical phase-conjugation (OPC) on transmitter side. It shows that the proposed EA communication system, with the...
Published: 4/20/2022   |   Inventor(s): Ivan Djordjevic
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Category(s): Technology Classifications > Engineering & Physical Sciences > Quantum Computing
Circularly-Symmetric Companding Quantization-Inspired Hybrid Constellation Shaping for APSK Modulation to Improve Power Efficiency
This technology is an improved amplitude phase shift keying (APSK) with better constellation power efficiency in Gaussian-noise-limited channel. The improved power efficiency makes it suitable for applications in power-limited communications such as fiber-optic communications, satellite communications, power-line communications, and MIMO communications. Background: One...
Published: 1/11/2021   |   Inventor(s): Ivan Djordjevic, Aleksandra Jovanovic, Zoran Peric, Slobodan Vlajkov
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Category(s): Technology Classifications > Engineering & Physical Sciences > Communications & Networking > Networking, Technology Classifications > Engineering & Physical Sciences > Communications & Networking > Wireless
Atmospheric Turbulence-Controlled Cryptosystems
This technology is a new type of cryptosystem that leverages atmospheric turbulence to protect free-space optical communication from eavesdropping. Background: Free-space optical (FSO) communication, the use of light as a communication method through the air, space, or water without the use of cables, is a promising communication method, particularly...
Published: 1/11/2021   |   Inventor(s): Ivan Djordjevic
Keywords(s):  
Category(s): Technology Classifications > Engineering & Physical Sciences > Communications & Networking > Networking, Technology Classifications > Engineering & Physical Sciences > Communications & Networking > Wireless
Surface Codes Based Quantum Networking
This invention uses surface codes to implement an extendable quantum communication network. Background: Quantum communication makes use of quantum physics to create highly secure networks that are immune to many techniques used to intercept the communication while in transit. But because quantum information degrades quickly, there are limitations on...
Published: 8/4/2020   |   Inventor(s): Ivan Djordjevic
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Category(s): Technology Classifications > Engineering & Physical Sciences > Communications & Networking
FPGA-Based Rate-Adaptive Spatially-Coupled LDPC Codes for Optical Communications
This invention discloses a rate-adaptive forward error correction (FEC) scheme based on spatially-coupled (SC) LDPC codes derived from quasi-cyclic (QC) LDPC codes with its field programmable gate array (FPGA) architecture. FPGA emulation demonstrates that the proposed LDPC codes provide larger coding gain and smaller error floor compared to the QC-LDPC...
Published: 7/8/2020   |   Inventor(s): Ivan Djordjevic, Xiaole Sun
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Category(s): Technology Classifications > Engineering & Physical Sciences > Communications & Networking
Secure, Global Quantum Communications Networks
This invention proposes a quantum network of satellites in order to provide global coverage. The idea is to have terrestrial quantum networks be connected with low earth orbit satellites and have a subnetwork of medium and greater earth orbit satellites. This invention capitalizes on the security and speed of quantum networks and common satellite communications....
Published: 6/24/2020   |   Inventor(s): Ivan Djordjevic
Keywords(s):  
Category(s): Technology Classifications > Engineering & Physical Sciences > Communications & Networking, Technology Classifications > Engineering & Physical Sciences > Communications & Networking > Wireless
Joint QKD-Post-Quantum Cryptosystems
This technology is a joint quantum key distribution (QKD)-post-quantum cryptosystem. The QKD is used for raw-key transmission and post-quantum crypto-system to transmit parity bits for information reconciliation. The technology can be further advanced by encoding either Slepian states-based encoding or OAM encoding. This would help overcome the low-spectral...
Published: 5/13/2020   |   Inventor(s): Ivan Djordjevic
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Category(s): Technology Classifications > Engineering & Physical Sciences > Communications & Networking, Technology Classifications > Engineering & Physical Sciences > Communications & Networking > Wireless, Technology Classifications > Engineering & Physical Sciences > Electronics