Wireless Networking aka “Wireless for IoT Class”
Course code: CS4222/CS5422
Semester 2, 2022/2023
Instructor: Professor Ambuj Varshney
Contact: ambujv@nus.edu.sg, COM3: #02-25
TUTORIAL 2 for WEEK4 (Starting 30th of January 2023)
In this tutorial, we will assist students in getting started with SensorTag. Additionally, for those who missed the tutorial in Week 3 (due to a public holiday), we will be available to address any questions they may have. There are also two specific (listed below) questions that will be covered.
[1] Question 1: A wireless receiver with an effective radius of 100cm is receiving signals at 2 GHz from a transmitter that transmits at a power of 100W and a gain of 40dB (or 10,000). Assume path loss exponent is 2.
- What is the gain of the receiver antenna?
- What is the received power if the receiver is 1km away from the transmitter?
- If the receiver is receiving signals at 900 MHz frequency (instead of 2GHz), please calculate (a) and (b) again? What do you notice and why?
[2] Question 2: Can you explain the difference between a microcontroller, system-on-chip, and microprocessor? Furthermore, what kind of processor does SensorTag CC2650 (used for projects) use ? and would you classify it as MCU/SoC/Microprocessor?
- Can you also provide an estimate for the maximum communication range (BLE) for CC2650, taking into consideration Gt and Gr equal to 2 dB, as well as identifying other relevant parameters from the datasheet? Do you think CC2650 can achieve your calculated range in indoor environments?
[3] Question 3: We would spend the rest of the tutoral getting students started with Assignment #1. The deadline for showing working Assignment #1, is Tutorial #3, Week 5.