Wireless Networks
The chapter extensively covers wireless network technologies, emphasizing the principles of wireless communication, detailed analysis of WLAN architecture, and operational procedures. It elaborates on critical metrics like Signal-to-Noise Ratio (SNR) and Bit Error Rate (BER), modulation techniques, and challenges posed by multipath propagation and interference. It concludes with a summary of the evolutionary advancements among IEEE 802.11 standards.
Sections
Navigate through the learning materials and practice exercises.
What we have learnt
- Wireless communication relies on electromagnetic waves, presenting unique propagation challenges.
- Key metrics like SNR and SINR are crucial for assessing link quality and data reliability.
- Modulation techniques and error-correcting codes play a significant role in enhancing wireless transmission efficiency.
Key Concepts
- -- SignaltoNoise Ratio (SNR)
- The ratio of the average desired signal power to the average noise power within a given bandwidth, expressed in decibels (dB).
- -- Bit Error Rate (BER)
- The number of erroneous bits received divided by the total number of bits transmitted, indicating the reliability of a digital transmission.
- -- Modulation
- The process of imposing digital information onto an analog carrier wave for transmission.
- -- Multipath Propagation
- The phenomenon where electromagnetic waves reach the receiver via two or more different paths, causing interference and distortion.
- -- CSMA/CA
- Carrier Sense Multiple Access with Collision Avoidance; a protocol used in wireless networks to manage how devices share the radio spectrum.
Additional Learning Materials
Supplementary resources to enhance your learning experience.