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Enhancing Direction Finding Accuracy In Perturbed Digital Arrays Via RF Ranging-Based Self Calibration
Get PDFDirection finding with radio-frequency (RF) waves have numerous applications in radio navigation, wireless localization, emergency aid, and air traffic control, among others. Direction-finding using digital arrays outperforms traditional analog techniques but requires precise knowledge of the location of the array elements to obtain accurate results. Array perturbations can lead to algorithm failures and false detection, compromising direction-finding capabilities.
This research proposes implementing a Matched Filter - Least Square (MF-LS) algorithm for Two-Way Ranging (TWR) to enhance direction-finding accuracy in arrays with perturbed element locations. The MF-LS algorithm leverages the properties of matched filters to accurately determine element positions by measuring the Time of Flight (ToF) of a signal between two ranging nodes. This method is independent of GPS or other sensor data, making it a cost-effective and easily deployable solution aimed at minimizing the effects of array perturbations, thus improving direction-finding accuracy.
This work validates the MF-LS algorithm efficacy and enables robust direction-finding capabilities in challenging environments where traditional communication and localization services are unavailable. Moreover, this research provides a comprehensive study of direction-finding accuracy in amateur radio bands using the proposed ranging approach which can provide an immediate low-cost option for search and rescue operations in emergency situations
Connected Palo Alto: Proposed Cycle Track for Enhanced Connectivity Between the San Antonio Corridor and Greater Palo Alto, CA
Get PDFThe City of Palo Alto is located within Santa Clara County, in the heart of Silicon Valley. Palo Alto borders the city of Mountain View, the city of Los Altos, and the campus of Stanford University. Palo Alto is considered to be one of the most bike-able cities in California and is a Gold-Level Bicycle Friendly City which was designated by the League of American Bicyclists (https://www.cityofpaloalto.org/Departments/Transportation/Bicycling-Walking#:~:text=The%20City%20of%20Palo%20Alto,the%20League%20of%20American%20Bicyclists.). One program that Palo Alto is leading the charge on is theSafe Routes to School program, a local community partnership between the City of Palo Alto, Palo Alto Unified School District (PAUSD), and the Parent Teacher Association (PTA). More than 57% of PAUSD middle school and high school students ride their bikes to school. Although Palo Alto promotes the practices of cycling to school, work, and elsewhere there are still some much-needed improvements to a multiple of Palo Alto’s main arterial roads. The two main arterial roads that are seriously lacking the proper bike infrastructure are San Antonio Road and Alma Street
Understanding the Behavior and Risk Tolerance of Future Construction Industry Leaders
Get PDFA long persisting detriment to the construction industry is the impact of alcohol, substance abuse, and gambling throughout the field. Many workers fear the repercussions of missing work and push through smaller, manageable pain, leading to injuries and further pain as they age. This causes a heightened usage of opiates throughout the industry to stay at work without bothering your company. Additionally, many young project engineers are not used to the demand of long hours every week and look for vices to relieve stress. While there is plenty of data on the construction industry overall, this study aims to learn about current Cal Poly Construction Management students before they begin their careers. The survey asked about the age students first tried an alcoholic beverage or another substance such as nicotine or marijuana, asked about their current habits, gambling habits, and gathered further information. The data collected was analyzed and compared to information on the general population and drew positive conclusions about the habits and outlook for future industry members. Overall, on average, current Cal Poly Construction Management students tend to have healthy histories relating to drugs and alcohol, safe habits, and are responsible if they choose to gamble
Using “Slow” to Reframe Failure: Fusing Wisdom from the Slow Movement with Self-Compassion Principles to Transform Communication Failures
Get PDFThis pedagogical approach invites students to critically examine conventional conceptions of failure. Informed by principles of the Slow Movement and self-compassion, this teaching activity prompts recurring reflection on who has power to define failure and how our responses to perceived failures shape our identities, relationships, and trajectories. Through reflective writing, speaking, and listening exercises, students are encouraged to reframe evaluations of communication failures with a lens that prioritizes contemplation, holistic context, self-companionship, and openness. By challenging masculinized notions of failure that lack self-compassion, this approach cultivates a growth mindset and helps students find more equitable, collectively compassionate interpretations of perceived shortcomings in intrapersonal, interpersonal, team, and institutional contexts
AGED 539 Internship Report: Improving Cal Poly Rodeo Horses\u27 Health and Fitness
Get PDFThis study was conducted to help enhance the overall health and fitness of the horses on the Cal Poly Rodeo Team. Data was collected before and after implementing the StallGrazer feeders to reduce the risk of sand colic and improve feed efficiency. Data was collected and analyzed before and after the weekly barrel racing jackpot series to enhance horse fitness. The StallGrazer feeders reduced the risk of sand clear and forage waste and the barrel racing jackpots enhanced the fitness and performance of the horses in the test group
Modeling a Hydropower Plant Powerhouse Based on Hebgen Dam
Get PDFThe United States Department of Energy (DOE) Water Power Technologies Office (WPTO) invited California Polytechnic State University (Cal Poly) to participate in the 2024 Hydropower Collegiate Competition (HCC) to research and design ways to convert non-powered dams (NPDs) to hydropower plants to contribute to a clean energy future. The Cal Poly HCC Electrical Engineering team used information gathered for the competition to create a simulated hydropower plant model of Hebgen Dam, in Montana, using a salient pole synchronous generator and a PID governor for an Electrical Engineering Senior Project. The simulated hydropower plant model allows a user to control the water flow rate through Hebgen Dam and observe the power output of the synchronous generator while meeting Federal Energy Regulatory Commission (FERC) water flow rate requirement
2-Bit Schiffman Phase Shifter
Get PDFPhase shifters are found in microwave/RF applications such as defense or wireless communications for their ability to control the relative phase of a system which allows for alignment of signals to obtain constructive interference. Typical phase shifters are chip level (digital and analog) which require a DC bias therefore restricting PCB use unless allowance for air gaps. The paper analyzes a passive and low-profile 2-bit phase shifter using the Schiffman architecture, which outputs a near-constant 90 degree shift over a wide band of frequencies. The design process initially confirmed a proper 90 degree phase shift over the desired WiFi band, followed by altering lengths of certain sections of the Schiffman architecture to achieve a 2-bit shifter. Proper operation of the device will allow for a substitution for the chip-level applications in defense (early warning radar, missile defense, and space surveillance) and communications (satellite communications and collision warnings)
Jayden Perez Senior Viola Recital
Get PDFA recital in partial fulfillment of the requirements for a Bachelor of Arts of Music
