Wireless Communications Flashcards
6 cards from real Telecommunications practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Wireless Communications flashcards as text
What technology allows multiple users to share the same frequency channel by assigning unique codes?
Answer: CDMA
CDMA (Code Division Multiple Access) lets multiple users transmit simultaneously on the same frequency by assigning unique codes.
What is the purpose of a channel in wireless communications?
Answer: Define a specific frequency range for transmission
A wireless channel is a specific frequency range within a band used to transmit data without interference from adjacent channels.
What does OFDM stand for?
Answer: Orthogonal Frequency Division Multiplexing
OFDM (Orthogonal Frequency Division Multiplexing) transmits data on multiple sub-carriers simultaneously, improving spectral efficiency.
What is the maximum theoretical speed of 802.11ac (Wi-Fi 5)?
Answer: 1.3 Gbps
802.11ac Wave 1 supports up to 1.3 Gbps using 3-stream 80 MHz channels, while Wave 2 reaches higher with MU-MIMO.
What is Bluetooth primarily designed for?
Answer: Short-range personal area network (PAN) communication
Bluetooth is designed for short-range PAN communication, typically within 10 meters, for connecting peripherals and devices.
What is RF interference and how does it affect wireless networks?
Answer: It degrades signal quality and reduces throughput
RF interference from other devices causes signal degradation, dropped packets, and reduced throughput in wireless networks.