Modern devices with spread spectrum application opportunities for wireless communications services performing

Oct 26, 2016Download as PPT, PDF1 like189 views

Can be downloaded here: https://drive.google.com/open?id=0B5J_auuoZpgbZTFzLWJhM3FiUW8 Topic: ”Modern devices with spread spectrum application opportunities for wireless communications services performing” Theses: - Technologies and devices of “Covert Wireless Communications”. - Test results of new devices of the company. - Features of new devices of the company. - Opportunities and prospects of wireless communication services based on products of the company.

Oleksandr Mazurenko
CEO, Covert Wireless Communications

Content
• Technologies and devices of “Covert Wireless Communications”.
• Test results of new devices of the company.
• Features of new devices of the company.
• Opportunities and prospects of wireless communication services based
on products of the company.

Technologies. Encoding/Modulation
The main data transmission principle consists in waveforms using in form
of Code Hoping CDMA. The most suitable case for this is Multichannel
M-ary Bi-Orthogonal Keying original channel encoding method.
(http://infotelesc.kpi.ua/article/view/47126)
Data
Key
Orthogonal Sequences
Set Generator
Sequence Selector
RF Frontend

Technologies. Algorithms. Encryption
Universal Orthogonal Sequences Fast Generation/Transform Algorithm
Allows to decrease computational requirements and DSPU cost radically
12 GIPS (FPGA) → ↓150 times → 80 MIPS (ARM Cortex M4/7)
Allows to implement new PHY layer encryption – Parallel Streams Encr.
One binary stream
(crypto analyzable)
16 parallel streams
(non analyzable)

Technologies. Another issues
Analogue / Prototype techniques: IEEE 802.11b, GPS PHY layer.
Advantages:
•Each next data symbol is transmitted by different orthogonal spreading
sequence
•Fast changing of channel encoding algorithm
•Does not require other encryption techniques
•Does not require outer synchronization channels
•Does not require carrier signal acquiring
•Allowable absolute frequency instability δf = 0,78х10-6

Devices. Parameters
Radio modem CWC_VHF 110-600MHz.
Parameters:
• Frequency range, F = 110-600 (433.92) MHz,
• Bandwidth, ΔF = 2 MHz,
• Radiation power, S = 0 dBm,
• Spread Spectrum Multiplier, М = 1024х2 (+33dB power
gain),
• Data rate, R = 9,6 kbps,
• Maximum transmission range ~1,5 km (~0,9 mile),
• Power consumption, P < 1 Watt.

Tests. Testbed
TX - Prototype CWC_VHF 110-600 MHz.
RX - SDR USRP B200 + GNURadio

Tests. Results
At next dynamic figures comments are absent for better visual perception.
Each figure consists of 3 part (from top to bottom): 1. RX signal time
domain; 2. RX signal detector response; 3. RX signal spectrum.
There are 4 figs for hidden transmission case and 3 figs for narrowband
interference (FSK signal) immunity case in next order:
•Primary/Reference case – signal are captured from modem ANT output;
•Hidden transmission with 60dB path loss, no gain;
•Hidden transmission with 60dB path loss, 60dB gain
•Hidden transmission with 120dB path loss, 60dB gain
•Reference case for interference immunity test, SINR = 0 dB
•Signal receiving in conditions of NB interference presence, SINR ≈ -30dB
•Signal receiving in conditions of NB interference presence, SINR ≈ -40dB

New opportunities
Narrowband and wideband link simultaneous operation
Radiation power increasing in ISM bands
ΔP= 40-45dB

New opportunities
Hidden transmission between distant objects
Signal envelop is recognizable
Signal spectrum is recognizable
Hidden transmission
1mW
<100m (330ft)
<300m (1000ft)
<1500m (0,9 mile)

New opportunities
Hidden transmission over short distances
Power adaptation
Р<1uW, R<100m (330 ft)

Wireless communication services
• Military communications
• Security communications
• Drones control
• Remote control

Prospects
• Spatio-temporal synchronization algorithm implementation / Code
Division Duplex application
• Complex network structures realization (Mesh, Ad-hoc)
• Encoder optimization / Data rate increasing
• Parallel streams encryption implementation
• High performance devices of 2,4GHz ISM band developing

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Materials, Sensors, and Actuators in MEMS Technology Evolution Microelectromechanical Systems (MEMS) technology has revolutionized various industries, including automotive, healthcare, aerospace, and consumer electronics. MEMS devices integrate mechanical and electrical components at the microscale, enabling precise sensing, actuation, and control. The evolution of MEMS has been significantly influenced by advancements in materials, sensors, and actuators. This document provides a comprehensive analysis of the role of materials, sensors, and actuators in the development of MEMS technology. 1. Introduction to MEMS Technology MEMS technology refers to miniaturized mechanical and electro-mechanical devices fabricated using microfabrication techniques. These systems typically include sensors, actuators, and electronic components integrated onto a single chip. The advancements in MEMS technology have been driven by the development of novel materials, improved fabrication techniques, and enhanced sensor-actuator performance. Key Features of MEMS Technology: Miniaturization of mechanical components Integration of electronic circuits and mechanical systems High precision and sensitivity Low power consumption Cost-effective mass production 2. Materials in MEMS Technology The choice of materials plays a crucial role in determining the performance, reliability, and efficiency of MEMS devices. MEMS materials can be broadly classified into structural materials, functional materials, and packaging materials. 2.1 Structural Materials Structural materials form the backbone of MEMS devices and are responsible for mechanical strength, stability, and durability. (a) Silicon-Based Materials Single-Crystal Silicon (Si): The most widely used material in MEMS due to its excellent mechanical properties, low cost, and compatibility with semiconductor fabrication. Polycrystalline Silicon (Poly-Si): Commonly used for microstructures such as beams, membranes, and cantilevers. Silicon Carbide (SiC): Offers high-temperature stability and chemical resistance, making it suitable for harsh environments. (b) Metal-Based Materials Aluminum (Al): Used for interconnects and microstructures due to its good electrical conductivity and ease of deposition. Gold (Au) and Platinum (Pt): Preferred for biomedical applications due to their biocompatibility. Titanium (Ti): Provides high strength and corrosion resistance for specialized MEMS applications. (c) Polymer-Based Materials Polydimethylsiloxane (PDMS): Widely used in biomedical MEMS due to its flexibility and biocompatibility. SU-8: A high-aspect-ratio photoresist polymer used in microfluidics and lab-on-a-chip applications. Polyimide: Provides good mechanical and thermal properties for flexible MEMS applications. 2.2 Functional Materials Functional materials exhibit specific electrical, magnetic, thermal, or optical properties that enhance MEMS device performance. (a) Piezoelectric Materials Lead Zirconate Titanate (PZT): Common

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Modern devices with spread spectrum application opportunities for wireless communications services performing

1. Oleksandr Mazurenko CEO, Covert Wireless Communications

2. Content • Technologies and devices of “Covert Wireless Communications”. • Test results of new devices of the company. • Features of new devices of the company. • Opportunities and prospects of wireless communication services based on products of the company.

3. Technologies. Encoding/Modulation The main data transmission principle consists in waveforms using in form of Code Hoping CDMA. The most suitable case for this is Multichannel M-ary Bi-Orthogonal Keying original channel encoding method. (http://infotelesc.kpi.ua/article/view/47126) Data Key Orthogonal Sequences Set Generator Sequence Selector RF Frontend

4. Technologies. Algorithms. Encryption Universal Orthogonal Sequences Fast Generation/Transform Algorithm Allows to decrease computational requirements and DSPU cost radically 12 GIPS (FPGA) → ↓150 times → 80 MIPS (ARM Cortex M4/7) Allows to implement new PHY layer encryption – Parallel Streams Encr. One binary stream (crypto analyzable) 16 parallel streams (non analyzable)

5. Technologies. Another issues Analogue / Prototype techniques: IEEE 802.11b, GPS PHY layer. Advantages: •Each next data symbol is transmitted by different orthogonal spreading sequence •Fast changing of channel encoding algorithm •Does not require other encryption techniques •Does not require outer synchronization channels •Does not require carrier signal acquiring •Allowable absolute frequency instability δf = 0,78х10-6

6. Devices. Parameters Radio modem CWC_VHF 110-600MHz. Parameters: • Frequency range, F = 110-600 (433.92) MHz, • Bandwidth, ΔF = 2 MHz, • Radiation power, S = 0 dBm, • Spread Spectrum Multiplier, М = 1024х2 (+33dB power gain), • Data rate, R = 9,6 kbps, • Maximum transmission range ~1,5 km (~0,9 mile), • Power consumption, P < 1 Watt.

7. Tests. Testbed TX - Prototype CWC_VHF 110-600 MHz. RX - SDR USRP B200 + GNURadio

8. Tests. Results At next dynamic figures comments are absent for better visual perception. Each figure consists of 3 part (from top to bottom): 1. RX signal time domain; 2. RX signal detector response; 3. RX signal spectrum. There are 4 figs for hidden transmission case and 3 figs for narrowband interference (FSK signal) immunity case in next order: •Primary/Reference case – signal are captured from modem ANT output; •Hidden transmission with 60dB path loss, no gain; •Hidden transmission with 60dB path loss, 60dB gain •Hidden transmission with 120dB path loss, 60dB gain •Reference case for interference immunity test, SINR = 0 dB •Signal receiving in conditions of NB interference presence, SINR ≈ -30dB •Signal receiving in conditions of NB interference presence, SINR ≈ -40dB

9. Tests. Hidden data transmission

10. Tests. Hidden data transmission

11. Tests. Hidden data transmission

12. Tests. Hidden data transmission

13. Tests. Narrowband interference immunity

14. Tests. Narrowband interference immunity

15. Tests. Narrowband interference immunity

16. New opportunities Narrowband and wideband link simultaneous operation Radiation power increasing in ISM bands ΔP= 40-45dB

17. New opportunities Hidden transmission between distant objects Signal envelop is recognizable Signal spectrum is recognizable Hidden transmission 1mW <100m (330ft) <300m (1000ft) <1500m (0,9 mile)

18. New opportunities Hidden transmission over short distances Power adaptation Р<1uW, R<100m (330 ft)

19. Wireless communication services • Military communications • Security communications • Drones control • Remote control

20. Prospects • Spatio-temporal synchronization algorithm implementation / Code Division Duplex application • Complex network structures realization (Mesh, Ad-hoc) • Encoder optimization / Data rate increasing • Parallel streams encryption implementation • High performance devices of 2,4GHz ISM band developing

21. THANK YOU!

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