LTE-ADVANCED Introduction: With the increase in the demands for high capacities, the mobile

Less than a decade ago, the telecom operators in the U.S., Western Europe, and Japan were upgrading their existing networks to high-speed 3G technologies. Now the world telecommunications industry is about the switching to the next-generation super-fast 4G technologies.

In terms of architecture, it has been very challenging to provide platform, and ability to render service with high availability from the providers of the first generation (1G) networks to 4G

When we think of a cellular network it is not a completely wireless network. No one has completely independent wireless network.

4G networks offer 10 or more times the data transmission rate of a 3G network. The data rates available on a 4G network allow the cell phone to access information from the Internet as fast as a land-line connection.

In MIMO system there is multiple antennas is provided at the transmitter side as well as receiver side. Using multiple antennas at the transmitter and the receiver side could able to increase spectral efficiency, produces higher capacity and provides more data rates for wireless communication. In MIMO system there is SU-MIMO that is called single user MIMO in which when there is data rates need to be increased for single user then it is known as SU-MIMO, and if there is individual stream is allocated to multiple users; then it is called multiuser MIMO (MU-MIMO).

With the advent of high technological advancements in the field of telecommunication, it has become necessary to provide full capacity network coverage and high data rates to a user at all places. The research paper will focus on introducing small cells as a solution to the user needs by giving an overview of different kinds of architectures for LTE deployment in small cells and coordination techniques for synchronization between these architectures.

Shared bandwidth – all wireless devices compete for available bandwidth. As the number of wireless nodes increase, the bandwidth can be reduced, which decreases the performance of the network.

5G aims at building hybrid networks utilizing both the Wireless LAN concept and WAN design. Thus, the world would have base stations everywhere providing ubiquitous network coverage to users at high speed. For example, a user walking on road is browsing internet using GPRS (General Packet Radio Service-WAN design). The moment he enters a mall with Wi-Fi (LAN design), seamless hand-over from GPRS to Wi-Fi would take place without the user’s

The paper I read is “Noncooperative Cellular Wireless with Unlimited Numbers of Base Station Antennas” written by Thomas L. Marzetta. This paper was published in IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 9, NO.11, NOVEMBER 2010. The pilot signal is a direct sequence spread spectrum signal continuously sending by the base station. It makes the base station could send data in the forward-link and demodulate cell phone signals in the reverse-link. The pilot signal is known as confessed, like 000000 or 111111. In frequency re-use technology, we divide the space into several cells. Due to the same or correlated pilot sequence re-use in contiguous cells, the base station will inadvertently send data to terminals in other cells or collect and combine reverse-link signals from terminals in other cells when processing. This is called pilot contamination. In this paper, the author mainly talk about the environment of multi-user(MIMO) operation with an infinite number antennas in the base station. He thinks that in this

The field of antennas is vigorous and dynamic, and over the last 60 years antenna technology has been an indispensable partner of the communication revolution. Antenna has been considered an important component in the development of modern wireless communication devices. In addition to receiving and transmitting energy, an antenna in an advanced wireless system is usually required to optimize the radiation energy in some directions and suppress in others. For wireless communication systems the antenna is one of the most critical components. A good design of the antenna can relax system requirements and improve overall system performance.

In MANETs, routing and resource management are done in a distributed manner; that is, all nodes coordinate to enable communications among themselves. This requires each node to be more intelligent so that it can operate both as a network host for transmitting and receiving data, and as a network router for forwarding packets for other nodes. There are currently two type of mobile wireless networks. The first is known as the infrastructure Centralize Topology or as a fixed structure networks as shown in Figure 1.4. The bridges for these networks are known as base stations (BS). A mobile node within these networks connects and communicates with the nearest BS that is within transmission range. As the mobile goes out of range of one

Abstract— In this paper considers an LTE-Advanced cooperative cellular networks. LTE Release 8 is one of the primary broadband technologies based on OFDM, which is mainly deployed in a macro/microcell layout. It provides improved system capacity, coverage and seamless integration with existing systems. LTE-Advanced significantly enhances the existing LTE Release 8 and supports much higher peak rates, higher throughput, coverage and lower latencies, which leads to better user experience. Also, LTE Release 10 will support the relay networks. The LTE-Advanced features satisfy the IMT-Advanced requirements. The objective of this work is to improve the cell-edge user’s throughput or to extend the coverage area by placing relays in a cell-edge area. When the channel condition between the eNB and UE is not good, then the cooperative communication takes place .The proposed system used the Type II relay station. To utilize the existing resources effectively the RS and eNodeB transmit in the same channel (In-Band) with decode-and-forward strategy. The power dividing method between eNB and RS is proposed to maximize the achievable rate on each subcarrier. This paper proposes the

4G allows IP-based voice, information and streaming multimedia at higher speeds and offers no less than 100 Mbit/s with high versatility and up to 1GBit/s with low portability (traveling). Various advancements thought to be 4G measures incorporate Long Term Evolution (LTE), Ultra Mobile Broadband (UMB) and the IEEE 802.16 (WiMax) standard. At the point when utilized as a part of MIMO frameworks it would have the capacity to give high information rate up to 100Mbps furthermore give QoS and Security administrations to end clients. The 4G goal is to meet difficulties displayed by the perpetually

Mobile devices are getting smaller, lighter, and more powerful; they have bigger screens and longer battery life, more features and more capabilities .With the rapid growth of user demands, and the limitations of third generation (3G) mobile communication systems, it is expected that fourth generation (4G) mobile systems are likely to reach the consumer market in another 4-5 years. 4G systems are expected to become a platform capable of providing increased bandwidth, higher data rates, and greater interoperability across communication protocols, and user friendly, innovative, and secure applications. This system will primarily focus on seamlessly integrating the existing systems like GSM, wireless LAN, and Bluetooth. Since 4G is

In this survey, we will discuss about different cooperative communication schemes like Relay communication and Node cooperative system. Later on we will perform comparison between conventional communication system and cooperative relay scheme based on power efficiency. We will also discuss about various factors that will impact the efficiency of cooperative systems. We will conclude with applications of cooperative communication in LTE advanced.