Problem
Assumptions:
• The RF signal is propagating in air (use calculators available online).
• You are calculating figures for the deployment of an outdoor Wi-Fi network for an open-air shopping area that covers about 150 metres (330 feet) of a city street in a straight line.
• The receivers have antennas with 5 dBi of gain at 5 GHz and 2 dBi of gain at 2.4 GHz.
• The AP is connected to omnidirectional antennas with 18 dBi of gain.
• Your transmitter is limited to 100 mW of power.
What will be the maximum strength of the signal, in milliwatts, for each of the two frequencies at the most receiver that is farthest from the antenna, which is installed at one end of the shopping area?
Assuming the receivers have a maximum sensitivity of -89 dBm and the noise floor is at -95dBm in your opinion will the signal strength be enough to provide good performance for the customers?