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The Restaurant That Gave Away Free Bread.

The Restaurant That Gave Away Free Bread.

A second parable about Wi-Fi monetisation. This article is part of a series. If you haven’t already done so, go and read “The Advertising Funded Bakery“. Now let’s get started with the second part. Imagine that you own a restaurant. You sell a specific kind of cuisine and your restaurant is well known for having good customer-service and the food receives good reviews too. One day, while looking for ways to further improve your customer-service, you notice that other restaurants…

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The Advertising Funded Bakery

The Advertising Funded Bakery

A parable about Wi-Fi monetisation. Imagine that you are the owner of a bakery. Maybe a small shop in the central business district of a city or town. Let’s assume that it is reasonably successful and that you have sufficient regular customers to sustain your business. As the business owner, you understand your fixed and variable costs quite easily. You know that your ovens, facilities and staff are capable of making a maximum number of loaves per day and you…

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Understanding Noise – Part 5: Noise Performance of Cascaded Systems

Understanding Noise – Part 5: Noise Performance of Cascaded Systems

Thus far in this series on Understanding Noise we have looked at: Part 1: Defining Noise Part 2: Sources of Noise Part 3: Noise Spectral Density Part 4: Noise Factor, Noise Figure and Noise Temperature Modern radio receivers and electronic communications circuits consist of filters, amplifiers and mixers connected in series.  Each component contributes to the overall noise performance of the system as noise is added by each stage. This post will discuss how to calculate the contributions of each…

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Using the ODROID C2 as a WLAN Testing Tool – Part 4: Installing FruityWifi

Using the ODROID C2 as a WLAN Testing Tool – Part 4: Installing FruityWifi

My System Specifications I am running Dietpi on an ODroid C2.  Here are the Details of my OS, most recently updated at the time of this posting.: root@dietpi:~# cat /etc/*-release PRETTY_NAME=”Debian GNU/Linux 8 (jessie)” NAME=”Debian GNU/Linux” VERSION_ID=”8″ VERSION=”8 (jessie)” ID=debian HOME_URL=”http://www.debian.org/” SUPPORT_URL=”http://www.debian.org/support” BUG_REPORT_URL=”https://bugs.debian.org/ The OS is currently in a default state, I have done nothing except edit some locale/language information and the keyboard layout.  I have basically got a bare bones DietPi installation at this point. Installing FruityWiFi I have…

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Filters

Filters

Signal filtering plays a fundamental role in electronics and communications.  Filters modify specific frequency components of time-domain signals and are used as a tool for signal quality improvement, information recovery and frequency separation [1].  Filters are a fundamental frequency domain tool and as a component in electronic circuits and digital signal processing allow us to: Isolate circuits from DC (0Hz) currents. Suppress high and low frequency noise in received signals. Improve the spectral efficiency of transmitted signals. Separate the frequency…

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