Aruba Migration Guide Table of Contents Introduction 802.11AC basics Why 802.11ac? 802.11ac technology overview Backward compatibility RF spectrum Multistation MAC throughput > 1 Gbps 256 QAM Wider channels More spatial streams Downlink multi-user MIMO Pros of 802.11ac Cons of 802.11ac Strategy and planning for 802.11ac migration Site planning basics Planning process Minimum requirements and actions to implement 802.11ac Aruba recommendations for 802.11ac migration General Capacity RF planning Installation
this introduces distortion that results in a higher level of data errors, the system can rely on the error correction to remove them. Data on OFDM The data to be transmitted on an OFDM signal is spread across the carriers of the signal, each carrier taking part of the payload. This reduces the data rate taken by each carrier. The lower data rate has
capacity given by regular multiple access techniques (FDMA, TDMA and CDMA) using the user position information to provide access to the best communication channel based on their spatial location. This paper presents Smart Antenna techniques applied to SDMA systems as an efficient frequency usage technique. Key Words — Base station, Beamforming, Code division multiple-access (CDMA), Dynamic Channel
analog systems were placed in service around the world during the 1980s. The 2G (second generation) systems designed in the 1980s were still used mainly for voice applications but were based on digital technology, including digital signal processing techniques. These 2G systems provided circuit‐switched data communication services at a low speed. The competitive rush to design and implement digital systems led again to a variety of different and incompatible standards such as GSM (global system mobile)
a. What does the network layer do? What is interior routing and what is exterior routing? In the Open Systems interconnection Model (OSI Model), the network layer lies in the third level and for network communication it provides paths for data routing. It is considered as the backbone of the OSI model because for the purpose for the data transfer between nodes, network layer performs selection and management of the best logical path. Switches, firewalls, bridges and routers are some hardware devices
frequency division multiple accesses (SC-FDMA) for downlink along with the conventional method of using it for uplink. Taking advantage of channel reciprocity in the case of FD communication and multiple antennas at eNB, use of singular value decomposition (SVD) in the downlink allows multiple user (MU) to operate
CHAPTER 1 PREAMBLE 1.1 INTRODUCTION Visible light is the form in which electromagnetic radiation with wave lengths in a particular range is interpreted by the human brain. Visible light is thus by definition comprised of visually-perceivable electromagnetic waves. The visible spectrum covers wave lengths from 380 nm to 750 nm. All electromagnetic radiation is light, but only small portion of this radiation can be interpreted by the human – this portion is call
WIRELESS COMMUNICATIONS Anto vinoth.M, Punith Maharishi.Y.R antovinoth.m@gmail.com maharishipunith@yahoo.com Abstract— Mobile communication is continuously one of the hottest areas that are developing at a booming speed, with advanced techniques emerging in all the fields of mobile and wireless communications. With this rapid development it is expected that fourth generation mobile systems will be launched within decades. 4G mobile systems focus on seamlessly integrating the existing wireless