Design And Implementation Of Mimo Ofdm

Wireless network infrastructure has become just another connection method for corporate and home users alike. This rapid acceptance can be attributed from:

Wireless Routers is a wireless local area network (WLAN) that determine the next route of the packet should travel to the destination (Rouse, 2005). It converts the internet connection that was received from phone lines into radio signals and brings convenience to the portability devices that has built-in network card to gain the radio signals to get to the Internet connection (Switcher, 2015). Table 2 refers to the comparison of three models of wireless router.

This is a direct extension of the 802.11b that extends the maximum data rate to 54Mbps, making it possible to serve up to five times as many users. Our Wi-Fi network is based on the IEEE 802.11 b/g standards, which is the most commonly used standard. We have added Wi-Fi access points in our network to give easier access to corporate data and services. Most of the devices in this network, for example the personal computers, smartphones, digital cameras, tablets and digital audio players connected using the Wi-Fi technology. The hotspot will be in the range of 20 meters (66 feet) indoors and a greater range outside.

In the recent years, wireless technologies have taken a new dimension in the ways society lives. Wireless broadband is available to everyone. Whether the users are at home, driving the car, sitting in the park, and it would even work while people are a pleasure boat ride in the middle of a lake. And because of this, the need to have information at any time and be connected in all places, all the time has been satisfied.

Additionally it should be considered with a sub-classification of unsought products. The XG Wi-Fi Gateway extends the functionality and security of modern router, thus the separate, pre-purchase of a router is required. Consumers have ample information available to make decisions regarding purchase decisions for routers; however, they have limited knowledge of the XG Wi-Fi Gateway peripheral or add-on. Consumers will require education and persuasion during the buying process. This is seen as a unique product, currently, there are no other devices or substitutes that offer the functionality of the XG Wi-Fi Gateway.

The market for wireless communications has experienced incredible growth over recent years and wireless LANs have rapidly become a very

Municipal Wi-Fi or Municipal wireless network is a step towards making Internet services available to everyone by wireless technology. A geographical area under a municipality is provided with a wireless broadband service in many cities in US. Currently this idea is getting spread around the world. The structure of the wireless network is a mesh network with more than hundreds of routers are installed on the outdoors of the buildings. The network is operated by a wireless ISP. In this report we will discuss about implementation of municipal WiFi in different countries and the status of those implementation.

Although to answer their many questions and concerns, IEEE expanded even further and created 802.11g. Having 802.11g was like having the best of both worlds with and achievable speed of 12 to 25Mbps, top speed of 54Mbps, 2.4 GHz frequency band and the production cost was low what could top that one would have to ask. The disadvantage is that it cost more than the 802.11b, to include the change in modulation created the same congested problems as that of 802.11b. The advantage is that it was compatible with both 802.11a and 802.11b, which made previous compatibility issues null and void. Similar to 802.11a, 802.11g transmit faster because it uses OFDM instead of CCK

An RF design, evaluate and select a WLAN architecture, a site survey, and capacity and coverage are the issues that need to be addressed before implementing a WLAN. Because there are limitations and performance issues to consider

The IEEE 802.11 standard ensures that all stations, both radio-based network interface cards (NICs) and access points, implement access methods for sharing the air medium. When installing wireless LANs (WLAN), most people don't give much thought to these mechanisms. A detailed understanding of 802.11's medium access methods, however, will enable the user to deal more effectively with issues such as radio frequency interference, denial of services attacks and throughput

It’s very important to determine the device and application requirements based on bandwidth, protocols and frequency. In wireless network, bandwidth, protocols and sometime environmental conditions affect the speed of the channel so we need to calculate the aggregate throughputs before designing the network. Today, users carry Wi-Fi devices such as notebooks, laptops, tablets and Smartphone’s so total throughput must be calculated by estimating number of connections rather than the number of the seats. Some common wireless networking standards such as 802.11a/b/g/n invented in the IEEE association must be supported by wireless network. For better performance and for faster devices (802.11n devices), dual-ratio access points should be deployed. Table1 [3] illustrate the different IEEE standards and throughput.

Wireless networking hardware requires the use of underlying technology that deals with radio frequencies as well as data transmission. The most widely used standard is 802.11 produced by the Institute of Electrical and Electronic Engineers (IEEE). This is a standard defining all aspects of Radio Frequency Wireless networking

During the past decade, OFDM has been adopted in many wireless communication standards networks, including European digital audio broadcasting system, and terrestrial digital video broadcasting, and satellite terrestrial interactive multiservice infrastructure in China. In addition, OFDM has been considered or approved by many groups are working in IEEE standard, such as IEEE 802.11a/g/n standard network, IEEE 802.15.3a, and IEEE 802.16d/e.

Although 4G network in some areas not yet fully universal, but the most recent 5G this topic has fired up. 5G network as a next generation mobile communication network, its theoretical maximum transfer speeds of up to tens of Gb per second, which is far more than the transmission rate of the existing 4G network, the whole ultra-high-definition movie can be downloaded completed within one second. 802.11ac technology are used in fifth generation network as a mainstay. It has also become the focus of the network industry concerned. This report try to represent a full picture of 802.11ac technology.

Abstract- In multiple-input multiple-output (MIMO) systems, spatial demultiplexing at the receiver is a motivational task. Thus, several detection techniques are investigated in existing literature. There is a tradeoff between computational complexity and optimal performance in many detection techniques. The ordered successive interference cancellation (OSIC) with minimum mean square error (MMSE) is used to improve the error performance. However, maximum likelihood (ML) detection gives optimal performance at the higher complexity level whereas MMSE-OSIC detection is less complex. Therefore, MMSE-OSIC2 detection is suggested as a solution. In this paper, spatial multiplexed (SM) MIMO systems are considered to evaluate error performance with different detection techniques such as MMSE-OSIC, ML and MMSE-OSIC2 in a composite fading i.e. Weibull-gamma (WG) fading environment. In WG distribution, Weibull and gamma distribution represent multipath and shadowing effects respectively. It is shown by simulation results that the MMSE-OSIC2 detection technique gives the improved symbol error performance (SER) which is closely likely ML performance