WorksheetsMultiple access
Total questions: 10
Worksheet time: 5mins
What does Frequency Division Duplexing (FDD) provide for every user?
No frequency allocation
A single frequency band for transmission
Two distinct bands of frequencies
One frequency band for both uplink and downlink
In Time Division Duplexing (TDD), how are the transmission directions managed?
By using a single time slot for both directions
By alternating time slots
Using two distinct frequency bands
By employing frequency hopping
What is the maximum vulnerable period in pure Aloha systems?
One slot time
Three slot times
Four slot times
Two slot times
What is a key feature of FDMA systems?
Time slots are dynamically assigned
Each user is allocated a unique frequency band
Users share the same frequency band
All users can transmit simultaneously
What does TDMA stand for?
Time Division Multiple Access
Time Division Management Access
Time Division Modulation Access
Time Domain Multiple Access
Which of the following is a characteristic of CDMA?
Operates only in narrowband systems
Requires guard slots between users
Uses spreading codes for transmission
Requires fixed frequency bands
What is the main advantage of using spread spectrum techniques?
Lower power consumption
Robustness against jamming
Simpler hardware requirements
Higher bandwidth efficiency
In Frequency Hopped Multiple Access (FHMA), what is varied in a pseudo-random fashion?
The transmission power
The carrier frequency
The modulation technique
The data rate
What is the purpose of guard slots in TDMA systems?
To allow for dynamic slot assignment
To avoid interference between users
To reduce power consumption
To increase data rates
What does the term 'soft capacity' refer to in CDMA systems?
Strict frequency management
Fixed number of users per channel
High power requirements
Ability to accommodate varying numbers of users
