Radio spectrum

name due to its similarity to WI-FI which utilizes radio waves for transfer of data. WI-FI is great for extensive wireless coverage in buildings but has severe limitations for high density wireless information coverage in limited space and has radio waves interference issues; While Li-Fi greatly overcomes such restrictions. These two technologies can be well thought-out as harmonizing to each other in numerous ways and Li-Fi has advantages over usual Wi-Fi.…

the invention of radio has caused the most impact for society as it provided society with easier communication and later on entertainment alongside with access to information. Guliemlo Maroni the Italian man who is credited as the inventor of radio. Marconi read a biography from Heinrich Hertz, a German physicist who proved the theory of electromagnetic waves to which Marconi used his experiment by sending transmissions from one side of the room to the other. Marconi took his idea to the Italian…

Comparison of the (EMS) 1rst Hypothesis: we believe that High Frequency has more energy than low frequency. Explanation: For this hypothesis, we found that our calculations were wrong and we tested this by using the electromagnetic spectrum: radio wave, microwave, radiation, infrared, visible light, ultraviolet, X-rays and gamma rays. We went outside and made a simulation by walking and each group was one of the spectrums and we looked at how many more laps one group did than the other and we…

Try and remember the last time you were in a store. There’s always a string of the weeks “top 40” songs, early 2000s boy band ballads, and 1980s one-hit wonders continuously playing over the speakers to amuse you while you shop. It’s difficult to pinpoint any time where you were not serenaded by the radio while you were out running errands. All of this is thanks to the invention of broadcast radio. Broadcast radio was by far one of the most important and revolutionary inventions, paving the way…

Code-division multiple access (CDMA) Discussion of CDMA Code-division multiple access (CDMA) is a multiple access method used by different types of radio communication technologies. Direct-sequence spread spectrum signals uses CDMA which allow more than one user to share a channel. CDMA is a form of multiplexing which allows many signals to occupy a transmission channel and optimizing the use of available bandwidth. Therefore, the receiver separates the signals from the users by cross…

In 1970, the FCC adopted its prohibition of cross-media ownership between FM radio stations and television stations within the same market. The FCC under the Nixon Administration prohibited newspaper cross ownership of radio or television stations (Yanich, 2014). When the Commission adopted the rule, it grandfathered newspaper/broadcast combinations in many markets, forcing dispossession only in highly concentrated markets. As a result, approximately seventy grandfathered newspaper/broadcast…

We all have cell phones and as teenagers we are always gossiping about the next phone or asking our parents to buy us the new iphone 7 plus or the Samsung galaxy s7. We also use cell phones more than we are suppose to. We use them for calling, texting, selfies, social media, etc, but did you know cell phones give off waves as well? One may ask how do cell phones give off waves? What does radiation have to do with a cellular device? Here I’ll tell you. According to Environment, Health, and…

1.provides Immunity to selective fading: One of the main advantages of OFDM is that is more resistant to frequency selective fading than single carrier systems because it splits the overall channel into multiple narrowband signals that are affected individually as flat fading sub-channels. 2.Resilience to interference: Interference appearing on a channel may be bandwidth limited and in this way will not affect all the sub-channels. This means that not all the data is lost.…

“Northside Independent School District in San Antonio, Texas, recently issued students at two of its campuses new badges with an embedded RFID (radio-frequency identification) chip in order to track their locations.” The schools have turned to radio frequency identification technology to help administrators keep count and track the whereabouts of students on campus. If a student is not in his seat during school time the district doesn’t receive daily funding for that student, because the school…

Survey The spectrum in which a network operates, plays an important role in the quality of service (QoS) of that network. In mobile communications for the early generation, 1G, 2G, 3G and 4G, the spectrum used were licensed spectrums [3]. Licensing of frequency spectrum enables the service providers to own the spectrum license and mandate that spectrum. Even though there is licensing of spectrum, in the current scenario the spectrum for wireless communication is very crowded. The main reason…