Software Defined Radios (“SDR”) were first developed by and for the US Air Force to enhance air to ground radio communication. The SDR software performs filtering, demodulation and signal enhancement. More recently, SDRs have moved into the mainstream. Typical amateur and home uses include morse code, signal sideband, slow-scan television and packet radio. www.wikipedia.com
First, for you non-geeks, a Software Defined Radio (SDR) is a radio where the typical radio hardware has been replaced by software. This allows you to turn any computing device (laptop, smartphone, etc.) into a radio. With an SDR, first responders and others cancommunicate with anyone, anywhere – no cell phone towers necessary. The Wireless Innovation Forum wrote a short paper with a thorough overview.
Most of the SDR kits available on the market today assume that you have some level of technical knowledge. Many of the kits are USB peripherals that require programming knowledge to implement. Some are full kits with limited functionality others are pc boards for enhancing existing radio hardware. Bliley Technologies wrote a good summary of the various SDR kits available in 2016 and again in 2018. In the years spanning these two reviews, the technology had developed significantly.
And, that technology continues to develop. There is a new SDR solution coming soon that brings this high-tech device into the hands of all of us – using your smartphone as the base components. i-BLADES is developing an SDR Smartblade that will snap onto your i-BLADES Smartcase, transforming your smartphone into a two way radio. How cool!
The Best Samsung Galaxy S11, S20, S11 Plus, S20 Plus Smartphone Cases Introduction If you’re going to buy an Android phone in 2020; let’s face it, you won’t do much better than a Samsung Galaxy S10 or S11. These are truly top of the range products, bearing the quality you’ve come to expect from Samsung’s flagship series. However - as with all premium products, they certainly carry quite the hefty price tag. That’s why we’re going to explore how to go about choosing the finest Samsung Galaxy S10 case, presenting you with some guiding criteria that would serve you well when it comes to choosing an S11 case at the moment it comes out.