Project

# Title Team Members TA Documents Sponsor
33 A 2D Model of Optical Satellite Communication System
 Jun Zheng
Xuanyi Jin
Yuxuan Li
Zhijun Zhao
 design_document2.pdf
proposal1.pdf
 Pavel Loskot
A 2D Model of Optical Satellite Communication System

##TEAM MEMBERS#
Yuxuan Li (yuxuan43), Zhijun Zhao (zhijunz3), Xuanyi Jin (xuanyij2), Jun Zheng (junz6)

##PROBLEM##
With the rapid development of aerospace and communication technologies, our demand for more multifunctional, stable, and advanced satellite communication products is increasing. Low Earth Orbit (LEO) satellites have gained widespread popularity due to their advantages, such as low latency and low deployment cost. They have shown promising potential in climate and geographical studies. With the advent of Starlink, LEO satellites have made their way into everyday households, delivering internet access to even the most remote areas. However, LEO satellites face a set of challenges. Since each satellite covers a smaller area and moves much faster than the Earth's rotation, a large constellation is required to ensure global coverage. Therefore, we believe that studying how these satellites communicate with ground stations is essential. We try to understand the dynamics of these interactions and optimize communication efficiency.

##SOLUTION OVERVIEW##
We plan to design a 2D Model that simulates the movement of satellites along an orbit around the Earth. The basic of this model contains two disks and a few laser transmitters and receivers. There will be an inner disk that represents the earth and an outer disk that represents the satellite's orbit. Both the inner and outer disks will be rotating to represent the rotation of the Earth and the satellites’ rotation on the orbit around the Earth. There will be laser transmitters on the inner disk and receivers on the outer disk to represent satellites that receive optical signals. The receivers (satellites) can only receive the optical signal within a small scattering angle of the laser source. The rotation of the disks should be driven by motors under them, and there should be storage components for the satellite that preserve the signal for the following decoding process. The signal to be transferred should be converted to binary codes, 1 if the laser is emitted within a specific frequency and 0 if it is not emitted. To test the performance of this system in different situations, we need to develop a graphical user interface system that can control the rotation speed of each disk and the frequency of transmitting laser while demonstrating the impact on the efficiency of signal transmission by showing graphs.

##SOLUTION COMPONENT##
Physical Simulation System:
Orbits Simulation System: Two concentric disks, one representing Earth’s ground station, the other representing an orbiting LEO satellite. Motors with adjustable rotational speeds to mimic orbital characteristics.
Signal Transmission Subsystem: A low-power laser that will be mounted on the Earth disk as the signal transmitter, The corresponding receiver(s) will be attached to the satellite disk as the signal receiver(s).

Software Control and Monitoring System: A software application that can manage disk speeds and laser signal, capture the real-time data, and simulate the relative motion and signal transmission of ground-satellite communication.

##Criteria for Success##
The 2D optical satellite communication model must remain stable under various conditions.
Users should be able to adjust the satellite speed during the simulation through a graphical user interface (GUI).
The satellite receiver should be able to detect the signal with sufficient strength.
The system should decode the received signal into a readable message to demonstrate that once a signal is received, it can be used for practical purposes. The model should evaluate and display the efficiency of optical signal transmission.

A Direct Digitally Modulated Wireless Communication System

Qingyang Chen, Bingsheng Hua, Luyi Shen, Dingkun Wang

Featured Project

TEAM MEMBERS: Luyi Shen luyis2 Bingsheng Hua bhua5 Dingkun Wang dingkun2 Qingyang Chen qc20

PROJECT NAME: A Direct Digitally Modulated Wireless Communication System

PROBLEM: Communication system is closely related to our life. We measure communication systems primarily by their effectiveness and reliability. But in fact, validity and reliability are a pair of contradictory indicators, and they need a certain compromise. We hope to improve the efficiency of communication system on the basis of guaranteeing the accuracy of communication.

SOLUTION OVERVIEW: The project is to design and implement a kind of communication system for the next generation technology which is much more simplified compared to the systems that existed. The final version of the system should be expected to be able to transmit data like images and videos.

Our basic idea is that the information can be send in digital signal form to matesurface, EM waves will be sent to the matesurface and be scattered to space. The information we want to transit will be carried on scattered EM waves. And once the receiver receives the signal it will be decoded into the original information.

Basically, our project is a kind of innovation or re-creation of an existing communication system. The biggest difference between our design and other systems could be the method to process the information. There is a significant component in our future design called metasurface, which could be used to adjust the phase, magnitude, and polarization along with other significant properties of EM waves which can send multi-digit signal at same time.

As for the functionality of our project, we think it could be an interesting trial and we have faith to finish it since everything we need in the project we could find plenty of research materials and reports to look into. Even if the project is not applicable in the end, we believe the application of the metasurface material could be still powerful in communication system.

SOLUTION COMPONENTS: Metasurface: it could be used to adjust the phase, magnitude, and polarization along with other significant properties of EM waves. Receiver: it is where information will be received and decoded. FPGA: it is where information will be prepared and send to the metasurface. Signal emitter: Send EM wave to matesurface.

CRITERION FOR SUCCESS 1.The system could be used to transmit data like Images and Videos. 2.The system should be able to demonstrate a certain level of supreme communication efficiency

DISTRIBUTION OF WORK: Dingkun Wang & Qingyang Chen

Responsible for the software part of the communication system, including the information processing sent by the computer, the receiver information receives and decode, the interface between software and hardware, etc.

Bingsheng Hua & Luyi Shen

Responsible for the design of metasurface in the communication system and the construction of the hardware of the communication system.