Netw360 W2 Ilab

Week 2 iLab Report

DeVry University

NETW360: Wireless Technologies and Services

COMPUTE RF BEHAVIOR AND MIMO

Compute RF Behavior

Calculate each of the five measurements in the project by performing every step in sequence. In your own words, summarize what you have learned concerning RF behavior.

Calculations

Step 4 (dBm of 1W): _____30dBm_______________

Step 11 (max gain): _____8.4dB______________

Step 15 (.11g free space loss): _____-81.561dB_______________

Step 17 (.11a free space loss): _____-88.361dB_______________

Step 19 (link budget): ___9.438999999999993dB_________________

Summary of RF Behavior

In your own words, summarize what you have learned concerning RF behavior from your calculations, readings and research.

Begin section here

MIMO

Introduction

What is MIMO? What’s the history? What issues are addressed? What are the goals?

MIMO, (pronounced “me-moh”), stands for “multiple input, multiple output” and it’s the most commonly used RF technology used in wireless transmissions such as Wi-Fi, LTE and Long Term Evolution. In the past, spatial diversity was limited to systems that switched between two antennas or signal combination. With additional levels of processing power, now spatial diversity and full spatial multiplexing can be utilized simultaneously.

MIMO was developed for basic spatial diversity by limiting the degradation caused by multiple propagation which led to the gradual change of going from additional separate signal paths in a broadcast to additional channels to carry additional data. Spatial diversity had first been used by two researchers, Arogyaswami Paulraj and Thomas Kailath and was then first put into prototype by Bell Labs.

There are two main formats for MIMO:

1.) Spatial diversity: Spatial diversity used in this narrower sense often refers to transmit and receive diversity. These two methodologies are used to provide improvements in the signal to noise ratio and they are characterized by...