Single Carrier-Frequency Division Multiple Access (SC-FDMA), a variant of OFDM, is used in the uplink (device to base station). SC-FDMA is selected for uplink purposes due to its lower Peak-to-Average Power Ratio (PAPR) compared to OFDM, which makes it more power-efficient for battery...
Both OFDM and OFDMA divided a channel into subcarriers through a mathematical function known as aninverse fast Fourier transform(IFFT). The spacing of the subcarriers is orthogonal, so they will not interfere with one another despite the lack of guard bands between them. ... Each OFDM subcarr...
Multiplexing is used in a wide range of industries to facilitate both analog and digital communications, particularly in environments where bandwidth is limited, and its efficient use is desirable. The concept was first introduced in the 1870s to support telegraphy but has since become a mainstay ...
Is the Apple AirPort Express discontinued? Yes. While you may still have an AirPort Express that works, you won't be able to replace it when it kicks the bucket. Apple discontinued all of their routers, including the Express, in 2018. Why is my AirPort Express blinking yellow? The blinkin...
802.11g is faster because it uses the same OFDM coding as 802.11a. 802.11n (introduced in 2009) is backward compatible with a, b and g. It significantly improved speed and range over its predecessors. For instance, although 802.11g theoretically moves 54 megabits of data per second, it ...
Superhet Radio Receiver: What it is & How it Works Understand what the superhet or superheterodyne radio is, how it works, where it is used, its advantages & disadvantages and how it became one of the most successful forms of radio receiver....
What is Power Line Communication (PLC) and How it works Power line Communications (PLC), also known as Power Line Telecommunications (PLT) is the communication technology which uses the existing public and private wiring for the transmission of the signals. Using PLC communication signals, high-sp...
leading to longer and more reliable transmission wires. It also enabled the sending of analog signals with carrier signals andfrequency-division multiplexing, a forerunner to modern orthogonal FDM (OFDM) used inWi-Fiandcellular data, so after that, a single cable could carry as many as 24 simult...
“What is LoRa?” Whenever someone asks me this question, it’s hard to know exactly how to answer without knowing why they’re asking. That’s because LoRa can refer to more than one thing:Technically, it is a radio modulation scheme—a way of manipulating a radio wave to encode ...
This standard is faster because it makes use of OFDM coding which breaks the data up in smaller units like with 802.11a. 11n – this standard is the most advanced and can transfer 104 megabits per second over a frequency level of 5GHz. With the technology of today, you are able to ...