The Universal Handset You can understand how MIMO works, at least in broad terms, with a simple thought experiment. Suppose you set up a transmitter with a single antenna and then move a receiver, also with a single antenna, far enough away for the reception to fade in and out once in a while. Such problems arise because the transmitted signal takes multiple routes to the receiver—some of it perhaps bouncing off a passing car, other parts reflecting off the steel beams of the building where the receiver is located. MIMO sidesteps that pitfall by multiplying the number of possible paths between transmitter and receiver. Throw in some serious number crunching to process the digitized signals and you can achieve extraordinarily high data rates. Another tricky issue for the makers of SDR handsets is designing the transmitter’s power amplifier so that it can operate over a broad range of frequencies without mangling the signal. Avoiding problems in such cases typically requires some kind of feedback mechanism.
Esto es una guerra psíquica (sobre las causas secretas de las cosas) Felix qui potuit rerum cognoscere causas [Feliz el que puede conocer las causas de las cosas] -Virgilio La bomba ha estallado… —¿Qué bomba? —La bomba psíquica, la bomba maestra. -James Baldwin En el mundo en el que vivimos la mayoría de las veces no sabemos qué es lo que causa las cosas. En el poema «Alguien», Jorge Luis Borges escribe: «puede sentir de pronto, al cruzar la calle, una misteriosa felicidad que no viene del lado de la esperanza sino de una antigua inocencia, de su propia raíz o de un dios disperso». ¿Alguna vez te has sentido alegre sin razón aparente, sin causa coherente, solamente porque las circunstancias se conjugaron de manera inesperada, una mañana radiante, una felicidad que no parece provenir de un hecho concreto? Don Juan le decía a Carlos Castaneda (o Castaneda decía que Don Juan le decía) que la suerte es un tipo de poder, una especie de ley generalmente invisible. Parecería que estamos hablando del karma. El Teorema de Bell explica así el entrelazamiento cúantico:
Winner: Radio Revolutionaries Illustration: Sean Mccabe; Original Photo: Joshua Dalsimer Vanu Bose, founder, and John Chapin, CTO, of Vanu Inc. Software-defined radio is one of those promising but elusive ideas that’s been anticipated for quite some time. A cellphone based on software-defined radio would be lighter, smaller, cheaper, and more power efficient. We aren’t there yet, but software-defined radio is definitely coming. Steps like this: Vanu, a small Cambridge, Mass., company, says that this year it will begin selling the first cellular base station that can simultaneously process two waveforms—CDMA (short for code division multiple access) and GSM (global system for mobile communications)—all in software running on off-the-shelf computer servers. For cellular carriers, the advantage of such technology is clear. Or, as a top executive at one of the major cellphone carriers remarked after seeing the new Vanu base station in action, ”This could be game changing.” Vanu takes a very different tack.
Music evolution: Is this the end of the composer? 18 June 2012Last updated at 20:47 ET By Rebecca Morelle Science reporter, BBC News Professor Armand Leroi from Imperial College London explains why he thinks a Darwinian computer program that can evolve music from noise could kill off the composer You might think that creating the perfect piece of music - whether it's a classical great, jazz masterpiece or pop hit - is all down to the composer's talent, flair or even genius. Not so, according to Armand Leroi from Imperial College London. "What we are trying to find out is whether you need a composer to make music," says the professor of evolutionary developmental biology. "And we don't think you do." He believes a much more fundamental force of nature is at work. "We don't often think of music as evolving, but everybody knows it has a history and it has traditions. Scientists think that creating good music may not be the sole preserve of composers such as Mozart To begin with, the computer program randomly churned out two short loops of noise.
FREE ENGINEERING RESEARCH PAPERS-ENGPAPER.COM Actualidad Actualidad ¿Dialogar o no dialogar?, por Luis Vicente León La oposición o, mejor dicho, las oposiciones han jugado un rol relevante durante estas semanas de conflicto. El clúster moderado, conformado por quienes buscan presionar legítimamente los cambios en el gobierno para que atienda los gravísimos problemas del país y respete los derechos políticos y ciudadanos, ha intentado canalizar la protesta por la vía firme [...] Luis Vicente León | Actualidad | 9 de Abril, 2014 Tamoa Calzadilla responde 5 preguntas sobre el estado del periodismo de investigación en Venezuela 1. Prodavinci | Actualidad | 8 de Abril, 2014 Chávez: “No se asusten: es una revolución” [un fragmento "Apaciguamiento", de M. En su libro ‘Apaciguamiento. Venezuela la gasolina mas barata del mundo: lea, contraste y analice [Audio] Daniel Samper Pizano comenta sobre la libertad de expresión en Venezuela Al límite: Hay que desmontar el desencuentro Henrique/Leopoldo; por Luis García Mora Umberto Eco | Actualidad | 6 de Abril, 2014
The 6 Best Software Suites for Startup Businesses This is a guest post by JT Ripton, a freelance writer and an aspiring entrepreneur. Running a start-up business isn’t easy, it is rewarding, encouraging and satisfying but it can also be the most frustrating period of your business’s lifespan, however you can make things run a little smoother using these 6 business software suites. 1. Sales Cloud: The Best Way to Stay Connected With Your Clients Sales Cloud is a CRM (Customer Relationship Management) software. 2. Manage your business finances with QuickBooks, the accounting software for businesses. 3. With the LogMeIn software you can work on your work computer form literally anywhere. 4. Microsoft Office has everything you need. 5. Make your business IT infrastructure more productive and secure with Microsoft Enterprise. There are several communication tools available with Enterprise including voicemail integration, HD video web conferencing, instant messaging, and Skype connectivity. 6.
عواصف ذهن | عن التعلّم والأفكار الفعالة، وأشياء جميلة أخرى الاختراعات للعرب | Arab Invent USB in a NutShell - Chapter 1 - Introduction Starting out new with USB can be quite daunting. With the USB 2.0 specification at 650 pages one could easily be put off just by the sheer size of the standard. This is only the beginning of a long list of associated standards for USB. There are USB Class Standards such as the HID Class Specification which details the common operation of devices (keyboards, mice etc) falling under the HID (Human Interface Devices) Class - only another 97 pages. If you are designing a USB Host, then you have three Host Controller Interface Standards to choose from. None of these are detailed in the USB 2.0 Spec. The good news is you don’t even need to bother reading the entire USB standard. So now we can begin to read the parts of the standard relevant to our needs. 4 - Architectural Overview 5 - USB Data Flow Model 9 - USB Device Frame Work, and 10 - USB Host Hardware and Software. Peripheral hardware (Electronics) designers on the other hand may only need to read chapters,
untitled في هذه الحلقة:كيف يستطيع المخلوق الانطربرونوري أن ينتج كميات كبيرة من الأفكار ونوعية الأفكار المنتجة عن البرنامج:قامت خرابيش بإنتاج مسلسل كرتوني يتحدث عن القصص التي يتعرض لها أصحاب الشركات الناشئة (entrepreneur) بأسلوب كوميدي فكاهي. وقد تم عرض هذا الفيلم في افتتاح ميدان التي تعنى باحتضان الأفكار الإبداعية للشباب وتطويرها إلى شركات ناجحة و"ومضة" هي منصة للرياديين أقامتها أبراج كابيتال وشركة ريادة لتطوير المشاريع (RED) من أجل تسهيل ريادة الأعمال في منطقة الشرق الأوسط وشمال أفريقيا وجنوب آسيا. بطل هذا المسلسل هو عنتربنور الذي يتحدى الصعاب من أجل إنشاء شركته الخاصة. إنتاج شركة خرابيش www.kharabeesh.comfacebook.com/kharabeeshcartoonsyoutube.com/minientrepreneuryoutube.com/kharabeeshcartoonstwitter.com/antarbannourtwitter.com/kharabeesh Kharabeesh has produced an animation series that talks about entrepreneurship. The animation talks about the daily stories that happen to young Entrepreneur. Production by kharabeesh