How can I use software defined radio to detect and locate a drone flying over my property?
To detect and locate a drone flying over your property using software-defined radio (SDR), you would need to follow these general steps:

Acquire an SDR device: You will need to purchase an SDR device that is capable of receiving signals in the frequency range used by the drone's radio control system. Some popular SDR devices include the RTL-SDR and HackRF One.

Install the necessary software: You will need to install software on your computer to interface with the SDR device and process the received signals. Popular software options for this include GNU Radio and SDR#.

Scan for signals: Using the software and SDR device, you can scan for signals in the frequency range used by the drone's radio control system. You may need to consult the drone's user manual or do some research online to determine what frequency range to scan.

Analyze the signals: Once you have detected a signal, you will need to analyze it to determine if it is coming from a drone or another source. You can use the software to visualize and analyze the signal's characteristics, such as its frequency, modulation type, and signal strength.

Locate the drone: To locate the drone, you will need to use a technique called direction finding. This involves using multiple antennas to determine the direction from which the drone's signal is strongest. You can then use this information to triangulate the drone's location.

It's worth noting that detecting and locating a drone using SDR can be a complex process that requires a good deal of technical knowledge and expertise. Additionally, it's important to consider the legal and ethical implications of monitoring drone activity in your area.
Could you give me some software and hardware solutions for using SDR in this manner?
Sure! Here are some popular software and hardware solutions for using SDR to detect and locate drones:

Software:
- GNU Radio: This free, open-source software is a popular choice for SDR enthusiasts and professionals alike. It provides a graphical interface for building and testing radio signal processing workflows.
- SDR#: This Windows-based software is a lightweight SDR receiver that is easy to use and supports a wide range of SDR devices.
- GQRX: This Linux-based software is a popular SDR receiver that supports a wide range of devices and provides a user-friendly interface for signal analysis and processing.

Hardware:
- RTL-SDR: This is a low-cost SDR device that is widely used by hobbyists and professionals alike. It is capable of receiving signals in the 24 MHz to 1.7 GHz range and is compatible with a wide range of software.
- HackRF One: This is a more advanced SDR device that is capable of transmitting and receiving signals in the 1 MHz to 6 GHz range. It is a popular choice for researchers and professionals working on SDR-based applications.
- BladeRF: This is a high-performance SDR device that is capable of transmitting and receiving signals in the 300 MHz to 3.8 GHz range. It is a popular choice for high-end SDR applications and research.

It's important to note that selecting the right software and hardware for your specific use case will depend on a variety of factors, including your budget, technical expertise, and desired level of performance.