ArtemisNetworks

Hi, I let Steve Perlman know about your questions and he just got to me and said he read through all of you discussion posted so far. First, he wants you to know an updated and far more detailed white paper is coming. He and Antonio had planned to have it done before the announcement, but they just ran out of time (and hit limits of human exhaustion), largely due to an unexpected ramp up demos and tech due diligence meetings covering some of the very topics you are discussing. He apologies personally for not having the whitepaper completed. This is a very different approach to wireless and he knew there would be significant questions asked that we are happy to answer. The technology not only works as advertised, but we've spent years not only making it computationally tractable and scalable, but also making it extremely practical and fast and inexpensive to deploy. These answers from Steve do not answer all of your questions (the ones require long answers are best answered in the white paper), but he wanted to toss over a few. What's below is directly from Steve: 1. pCell has far greater range than cellular. We can crank up power to reach a user. Cellular had to limit power to avoid interference with adjacent cells. There's some good Matlab figures in the Columbia University talk that show this (e.g. the Serendipitous antenna layout figures) 2. Yes, pCell tech will give any operator (small or large) an immense competitive edge (and its subscribers far better service, in terms of throughput, consistency, coverage, lower latency and device power consumption) 3. There is no modification, software or hardware, to standard LTE devices. If you take LTE test equipment made to receive and analyze a standard LTE signal and connect an antenna to it in a pCell coverage area, the device thinks it is receiving a standard LTE signal, just one that is extremely high SINR with no other users sharing the eNodeB (the LTE protocol transmitted from an LTE cell tower). An LTE phone's antenna sees the same thing: from its point of view, it is in a standard LTE cell with very high SINR, and it is only user in the cell. 4. We expect to work with other infrastructure companies who will manufacture Artemis-compatible pWave radio heads and deploy them, setup front haul, and set up data centers for the C-RAN. We'll supply the software that runs on generic Linux-based servers. For example, the entire Columbia University demo, including 8 virtual eNodeBs and generating their physical layer waveforms that fed into pWave processing, and generating the physical layer waveforms for 8 radio heads was implemented in our own software-defined radio (SDR) code running on two dual 8-core Intel motherboards. It was completely real-time, with room to spare. So, we actually see ourselves as a cloud software radio company, and we're happy to work with anyone who is actually going to deploy the tech (and not interested in working with anyone planning to just sit on it). 5. pCell works in any band, not just mobile and not just licensed. We can't comment on our carrier relationships, but we are working in more than the one licensed band referenced in this discussion group. And, we also are working in unlicensed spectrum. As it turns out, we ended up using 3 bands, 1 UHF, 2 microwave (can't say precisely which, because it would identify the partner that owns the spectrum) across the demos in the various videos and Columbia, just because what was set up when we had a window to shoot and/or where we had a license to do the demo (licenses are location-specific). We work in unlicensed spectrum (compatibly with LTE in 900MHz, which is unlicensed in the Americas), and also have done extensive testing in HF for ionospheric pCell up to about 45 miles away, but traveling 300 miles up and back from the ionosphere. pCell tech works great at even such long distances, and it also verifies that pCell size remains the same regardless of distance (it's proportional to wavelength). So, the range is really only limited by the MRC of the power of the pWave radios reaching the user. 6. The Columbia University demos were all done with only about 1mW of power from each pWave, including the 10MHz multiple 4K/1080p video demos. As you can see from the Matlab sims, we achieve enormous efficiencies over cellular. Cellular seeks to maintain SINR across the entire coverage area as best it can, resulting in most of the coverage area having low SINR. We only maintain high SINR exactly where the LTE devices' antennas are. The white paper will go into this in more detail. 7. Lastly, the white paper won't answer every question down to the last detail (if it fully described all the layers of the pCell system as well as all the techniques we developed to make it computationally tractable and commercially practical), it would be volumes. For example, simply the technology we developed to achieve perfect reciprocity with uncalibrated RF chains (e.g. iPhones, dongle, Android phones) is an entire body of work itself (and certainly has many applications outside of pCell) that would take more than a whitepaper to explain. It was just one of the many things we had to develop to get pCell to be a drop-in wireless tech for carriers (which we knew was the only way we'd ever get something deployed rapidly). So, again, apologize for announcing something "too good to be true" without the white paper backup. But we had already scheduled the Columbia demo and had to announce then. Sincerely, we had hit human levels of exhaustion. it is no exaggeration that we've been all getting 2-3 hours of sleep at night for the last few weeks. But it is coming. It won't answer everything, but keep asking, and we'll try to get you answers. (If you can't wait, feel free to dig through the patents that cover a lot of it.) Bottom line: pCell works superbly as advertised. We appreciate and invite your hard questions. And, also, it may well be there is something we didn't think of that your questions may expose that we have to address, and indeed we will. More coming later. *SGP*

Steve answers some technical questions in this article: http://venturebeat.com/2014/02/20/steve-perlman-pcell-is-real-and-it-will-change-the-world-interview/view-all/

Great questions. We're glad you're interested. at Columbia University for the Engineering faculty and students might answer a few of them...