Electronic Devices Circuits Spread Spectrum Online Exam Quiz
Electronic Devices Circuits Spread Spectrum GK Quiz. Question and Answers related to Electronic Devices Circuits Spread Spectrum. MCQ (Multiple Choice Questions with answers about Electronic Devices Circuits Spread Spectrum
In a fast FH spread spectrum system, the information is transmitted via FSK with non coherent detection. Suppose there are N = 3 hops/bit with hard decision decoding of the signal in each hop. The channel is AWGN with power spectral density 0.5No and an SNR 20 ~13 dB (total SNR over the three hops). The probability of error for this system is
Options
A : 0.013
B : 0.0013
C : 0.049
D : 0.0049
The period of PN sequence is
Options
A : 1.5 µs
B : 15 µs
C : 6.67 ns
D : 0.67 ns
The chip duration is
Options
A : 1µs
B : 0.1 µs
C : 0.1 ms
D : 1 ms
The PN sequence length is
Options
A : 10
B : 12
C : 15
D : 18
The processing gain is
Options
A : 14 dB
B : 37 dB
C : 58 dB
D : 104 dB
Suppose the hop rate is increased to 2 hops/bit and the receiver uses square law combining the signal over two hops. The hopping bandwidth for this channel is
Options
A : 3.2767 MHz
B : 13.1068 MHz
C : 26.2136 MHz
D : 1.6384 MHz
The coding gain is
Options
A : 7 dB
B : 12 dB
C : 14 dB
D : 24 dB
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