Modeling and Fabrication of a Reconfigurable RF Output Stage for Nanosatellite Communication Subsystems

Current small satellite platforms such as CubeSats require robust and versatile communication subsystems that allow the reconfiguration of the critical operating parameters such as carrier frequency, transmission power, bandwidth, or filter roll-off factor. A reconfigurable Analog Back-End for the space segment of a satellite communication subsystem is presented in this work. This prototype is implemented on a 9.5 cm2 6-layer PCB, and it operates from 0.070 to 6 GHz and complies with CubeSat and IPC-2221 standards. The processing, control, and synchronizing stages are carried out on a Software-Defined Radio approach executed on a baseband processor. Results showed that the signal power at the output of the proposed Analog Back-End is suitable for feeding the following antenna subsystem. Furthermore, the emitted radiation levels by the transmission lines do not generate electromagnetic interference.

Design of a Digital Baseband Processor for UHF Tags

In this paper, we present a new digital baseband processor for UHF tags. It is a low-power and low-voltage digital circuit and adopts the Chinese military standard protocol GJB7377.1. The processor receives data or commands from the RF front-end and carries out various functions, such as receiving and writing data to memory, reading and sending memory data to the RF front-end and killing tags. The processor consists of thirteen main sub-modules: TPP decoding, clock management, random number generator, power management, memory controller, cyclic redundancy check, FM0 encoding, input data processing, output data processing, command detection module, initialization module, state machine module and controller. We use ModelSim for the TPP decoding simulation and communication simulation between tag and reader, and the simulation results meet the design requirements. The processor can be applied to UHF tags and has been taped out using a TSMC 0.18 um CMOS process.

Design and Implementation of an Esp32-Based Smart Embedded Industrial Poultry Farm

Many poultry farmers are performing diverse operations manually. They, therefore, experience a huge financial loss as a result of their inability to properly automate the monitoring and control of environmental factors such as temperature, humidity, air quality, and to ensure an adequate supply of light and water. These factors adversely affect the chicks and lead to respiratory, digestive, and behavioural disorders. This affects the chicks’ food intake and leads to an increase in mortality rate and chances of diseases. Therefore, this paper seeks to address these factors by developing an embedded poultry farm. The system was developed using an advanced yet low-cost and low-power System-on-Chip offering WiFi baseband processor and a plethora of peripheral interfaces for the actuators and sensors while Arduino emulator in Proteus 8 was the tool used for the design simulation. The system when tested was able to sense environmental parameter status wirelessly and responds accordingly to regulate and maintain an optimum condition for improved health condition for the chicks. The automated system will help for the purpose of improving productivity and environmental or climatic conditions in the poultry farm, making it conducive for the broiler chicks.

A Reconfigurable Analog Back-End for CubeSat Communications

Current small satellite platforms such as CubeSats, require robust and versatile communication subsystems that allow the reconfiguration of the critical operation parameters such as carrier frequency, transmission power, bandwidth, or filter roll-off factor. In this paper, a reconfigurable Analog Back-End for CubeSat communications is proposed. This prototype is implemented using CAD software, on a 6-layer PCB of 10 cm^2 to implement a transceiver that operates from 0.070 to 6 GHz and complying with CubeSat and IPC-2221 standards. An Software-Defined Radio approach implemented on a baseband processor is used for control purposes. Measurements showed that the signal power at the output of the proposed analog back-end is suitable to feed the subsequent antenna subsystem.

Development of Iot based Smart Security and Monitoring Device using Digital Defence for Agriculture

The agricultural sector, which is the powerhouse of Indian financial system, needs protection. Safety, not only in terms of infrastructure as well as in terms of agricultural commodities, requires assistance and support at a very preliminary stage, such as protection from attacks by rats or pests in farms or seed stores. These problems could also be carefully considered. The convergence of conventional technology with all the latest technologies including the IOT (internet of things) and the Wireless Signal Systems will contribute to ecological modernization. Taking this system in mind, we are investigating a baseband processor on the' Internet of Things' that will be able to analyze the detected knowledge and then communicating it to the client. In our present system, we address the actual obstacle of farmers and the threat of endangered species and pest harm utilizing detectors. In the existing system, many peasants are afraid of pests reaching the fields and absolutely killing the crop. It creates a financial loss for peasants when anticipating a benefit.