Wireless Channel Model. The basic model of communication systems includes a transmitter (Coding) and a receiver where the transmitter transmits information at desired frequency to the receiver and the receiver (Decoding) receives the information from the receiver. The most basic input signal is consists of {1,0} In recent years there has been a large emphasis placed upon wireless communications networks (mobile networks) and how they can improve the business environment. The purpose of this discussion is to explore the concept of wireless communication networks and all the mechanisms involved in making them effective. Our investigation will explore the history and Wireless communication is one of the biggest contributions to technology. Today most things we use have wireless technology. From radios, to internet, Wi-Fi, cell phones, cordless phones, television remotes and so on and so forth. Some of these devices have a short range of only a few metres like a TV remote control
FREE Wireless Communication Essay
Wireless communication is the process of transmitting data and information over a distance without using wires, cables, or any other form of electrical conductors. What this means is that information is virtually transmitted from the source to the receiver using electromagnetic waves in open space. Information is sent to a specific, well-defined channel which has a fixed bandwidth, bit rate, and frequency. Data is thus defined by these aspects before transmission takes place, essay on wireless communication. Examples of wireless transmission include remote controls, mobile phones, satellite, Bluetooth technology and radio communication.
Cooperative communication is essential for wireless connection as it enables efficient utilization of communication resources, by allowing nodes in a communication network to collaborate with each other during information dissemination. Multiple-Input-Multiple-Output MIMO is a critical component in the transfer of data. As the name suggests, essay on wireless communication is an antenna technology for wireless technology that uses multiple transmitters and receivers to transfer various data at the same time. To implement this technology, both the station and the Access Point AP must be MIMO. Through the use of multipath, information bounces off the ceiling and other objects reaching the receiving antennae at different angles and slightly different times.
It is through this that multiple communications occur through a process known as diversity. For this to happen, MIMO systems merge data transmitted from various wireless channels that are created by multiple send and receive antennae. These systems, essay on wireless communication, therefore, combine information from different paths to enable cooperative communication to one receiver device. MIMO improves system reliability by increasing essay on wireless communication bandwidth and communication range which in turn creates extra pathways to transmit more information before recombining them at the receiver.
For diversity to occur, single antenna mobile can share their mobile status giving rise to virtual systems that allow data decoded to the receiver. Orthogonal Frequency Division Multiplexing OFDM on the other hand is a digital essay on wireless communication method often used in wireless form to split signals into different channels thus reducing crosstalk. The technique thus employs the use of many spaced subcarriers which contain numbers of parallel data channels which cut the data. OFDM modulation technique is essential in wireless communication as it helps to circumvent the hazardous effect of inter symbol interference ISI. OFDM system allows signals to be split across several component streams with spacing between them which eventually reduces interference between symbols making it easier to receive different logo accurately while maintaining the same throughput.
MIMO technology in combination with OFDM is an interface solution for next generation Wireless Local Area Networks WLANs and 4G networks. Spatial multiplexing yields increased data rates received in wireless communication links which can cause fading. A MIMO-OFDM based system, therefore, allows spatial multiplexing to be done by transmitting independent data with total transmitting power split across antennas and tones which in turn reduces this effect. Essay on wireless communication, space-frequency coding aims to introduce redundancy across space and time for spatial diversity in MIMO systems to be realized.
In many situations, obtaining channel estimation can be difficult, it is thus essential to develop coding schemes that do not require channel estimates at the transmitter or receiver. The MIMO-OFDM system is vital in the modulation and demodulation systems mainly through codes developed. Lastly, multiple-access in MIMO-OFDM systems is achieved through cooperative communication. In OFDM systems where collision is high, allows for simple multiple access using a single antenna. Signals are essay on wireless communication assigned different subsets of the available OFDM tones to users, essay on wireless communication.
The resulting multi-access orthogonal frequency division multiple access OFDMA is thus derived from a combination of orthogonal frequency division multiplexing OFDM and frequency division multiple access FDMA. OFDMA combined with MIMO eventually augments performance and boost capacity and range. In conclusion, it is clear that cooperative communication is essential and can be achieved through the use of both MIMO and OFDM systems. These systems can thus act as air interface in ensuring that wireless connection occurs efficiently. MIMO-OFDM systems can, therefore, help in guaranteeing multiple-access to broadcasting channels and in the creation of essay on wireless communication next generation networks, essay on wireless communication.
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Definition of wireless and cooperative wireless communication Wireless communication is the process of transmitting data and information over a distance without using wires, essay on wireless communication, or any other form of electrical conductors. Trust an expert. If you are the original author of this essay and no longer wish to have it published on the ProEssays website, essay on wireless communication, please click below to request its removal: Request. Similar essays:. Submit your request. First Name First name should have at least 2 letters.
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History of Wireless Communication
, time: 2:46Wireless Communications: An Effective Essay Sample
Wireless communication is one of the biggest contributions to technology. Today most things we use have wireless technology. From radios, to internet, Wi-Fi, cell phones, cordless phones, television remotes and so on and so forth. Some of these devices have a short range of only a few metres like a TV remote control More about Essay on Wireless Communication Security. Wi Fi Is One Of The Greatest Features Words | 5 Pages; Wireless Security Words | 14 Pages; The Evolution Of Wireless Networks Words | 9 Pages; Malicious Attack: Malicious Attacks And Threats That Could Be Carried Out Against The Network Words | 7 Pages Wireless Communication The most common wireless communication is Wi-Fi. Wi-Fi is most likely compatible to a computer that has a wireless card since it transmits to the wireless router. This will then provides Internet access to any devices that is connected to the wireless network. (Christensson, ). Microwave
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