MIMO

consumption for end-to-end data rate and maximization of network lifetime have become chief research concern. In recent years, many techniques have been proposed for improving the energy efficiency in wireless sensor networks. Among these techniques, V-MIMO technique has been considered as one of the effective ways to save energy. In WSN a node has two communication related energy consuming roles, one role is to serve as a packet generating source node (SN), and the other role is to relay packets for

Define 2 2.2 Context 3 2.3 Motivation 3 3. Literature review 4 4. 802.11ac key Technology 5 4.1 Work in the 5GHz band 6 4.1.1 Why 802.11ac is 5 GHz only? 6 4.2 MIMO 7 4.3 Challenge and issue in MIMO 7 4.3.1 Diversity and Multiplexing 7 4.3.2 Fading and interference 9 4.4 MU-MIMO 10 4.5 MAC virtual carrier sense technology 11 4.6 The large-scale MIMO technology 12 4.7 Multi-carrier technology filter group 14 4.8 Energy efficiency 16 4.9 Downward Compatible 16 5. Conclusion 16 6. Reference 17 7. Figure Reference

Network Optimization for future Infrastructure Communication Introduction: There has been a massive increase in mobile data traffic volume, which is always increasing every year by two times. The main causes by which mobile data traffic is increasing are two: a rapid increase in devices and data-hungry applications. In developing 5G, a lot of efforts have been made in three different areas: spectrum expansion, spectrum efficiency and network densification. In network densification

Figure 3.6 Waveforms of the QPSK mapping. 3.1.4 Subcarrier Allocation There are three reasons for outlining the "Subcarrier Allocation" square. The principal is to apportion the information and pilot subcarriers, the second is to embed invalid subcarriers which conveys "zero" data, and the third is to execute the FFT shift. After this square, 64 inputs for IFFT are readied. The execution module is portrayed in Figure 3.7. Two 64 x 16 double port irregular access recollections (RAMs) are utilized

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

problems caused by multipath wave propagation, a new technology has been introduced and it is Smart Antenna Technology. There are three forms of smart antenna, known as SIMO (single input, multiple output), MISO (multiple input, single output), and MIMO (multiple input, multiple output). 1.1.2 SINGLE INPUT MULTIPLE OUTPUT (SIMO) : Fig 1.1.2 : SIMO In SIMO, there will be only single transmitter and many receivers. 1.1.3. MULTIPLE INPUT MULTIPLE OUTPUT ( MISO): Fig. 1.1.3 : MISO In MISO there will

revision as a new standard. IEEE 802.11n is a revolutionizing standard which can achieve very high data rates with the introduction of MIMO technology in wireless networks and modulation schemes like OFDM.[1] Theoretically, it can achieve a maximum data rate of 600 MBPS which is nearly ten times more than its predecessor. It uses many efficient methods such as MIMO technology, OFDM scheme and many multiplexing techniques such as spatial multiplexing to bolster its quest for higher throughput. The

4G wireless mobile communication networks are been specified to support display, battery and computational power etc. 4G wireless mobile communication networks should not focus on air interface and data rate, but instead cover advance wireless mobile communication networks and high speed wireless access system into different platforms. The era of new wireless communication is evolving and it will soon penetrate into daily life and change the way we live. The key concept is integrating the 4g capabilities

ABSTRACT 4G wireless mobile communication networks are been specified to support display, battery and computational power etc. 4G wireless mobile communication networks should not focus on air interface and data rate, but instead cover advance wireless mobile communication networks and high speed wireless access system into different platforms. The era of new wireless communication is evolving and it will soon penetrate into daily life and change the way we live. The key concept is integrating

introspection (Drucker, 2008). These same questions apply to the Mind Matters Online services (MiMO short form).The MiMo is an innovative idea of a group of Psychiatrists, committed to bringing world-class mental health care within easy reach of a patient. The analysis of the MiMo services provides a valuable input through which an organization can gain a more accurate assessment of its effectiveness (MiMo, 2014). The modern business management world has changed dramatically since, the book published