QUIZ SRWC unit 4

CEPD model is a

• Single path propagation model

•  multipath propagation model

• Statistical propagation model

• Both a and c

OFDM in a wireless system aims to overcome

•   Time-varying channel

• ISI

•    Multi-path propagation

•    Multi-user interference

MSK is similar to ________

• CPFSK

• BPSK

• BFSK

•   QPSK

Answer explanation

MSK is a special case of Continuous-Phase Frequency Shift Keying (CPFSK) which is a special case of a general class of modulation schemes

MIMO technology takes the advantage of natural radio wave phenomenon called as

• Reflection

•   Multipath

• Refraction

• Diffraction

Answer explanation

MIMO technology uses a natural radio-wave phenomenon called multipath. With multipath, transmitted information bounces off walls, ceilings, and other objects, reaching the receiving antenna multiple times at different angles and slightly different times.

The common data rate of IEEE 802.11 OFDM

• 18 Mbps

•    36 Mbps

•     54 Mbps

• 72 Mbps

Answer explanation

The IEEE 802.11a standard specifies a modulation that divides a high-speed serial information signal into multiple lower-speed sub signals. Common data rates of IEEE 802.11 OFDM is 18 Mbps.