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Amplitude Shifting Keying and Frequency Shift Keying

Convert binary data into analog waveforms using different modulation techniques, compute frequency assignments, draw waveforms and constellation diagrams, explain error detection process, compute frame check sequence, compute transmitted signal using Direct Sequence Spread Spectrum, compare Infrastructure and ad hoc modes in WLAN

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Added on  2023-04-03

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This study material provides an overview of Amplitude Shifting Keying (ASK) and Frequency Shift Keying (FSK). It explains the concepts, applications, and advantages of ASK and FSK. The material also includes solved assignments and essays on ASK and FSK. Explore more at Desklib.

Amplitude Shifting Keying and Frequency Shift Keying

Convert binary data into analog waveforms using different modulation techniques, compute frequency assignments, draw waveforms and constellation diagrams, explain error detection process, compute frame check sequence, compute transmitted signal using Direct Sequence Spread Spectrum, compare Infrastructure and ad hoc modes in WLAN

   Added on 2023-04-03

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Amplitude Shifting Keying and Frequency Shift Keying_1
Question 1
Two level amplitude shifting key is also called On-OFF keying or BASK
(a) The analog carrier amplitude varies with bit stream
(b) The sinusoidal carrier shifts between two discrete values. Ther frequencies there in are fH for
binary 1 and fLfor binary 0
(c)They are also known as binary phase shift keying and uses opposite signals.
Amplitude Shifting Keying and Frequency Shift Keying_2
(d) Differential phase shift keying combines two basic operations namely differential encoding
as well as phase shift keying. The sequence of the binaru bits is such that next bit relies on
previous one
(e) M =2m
Where M =4 levels then m=2 bit ; the four levels are 00, 01, 10 and 11. The input
binary is divided into 2 since m=2
Amplitude Shifting Keying and Frequency Shift Keying_3
(f) Four phase in this level are0o, 90o, 180o and270o
(f) In eight levels ASK, the carrier signal amplitude varies with the input 3bit symbol. Here
M =8 since m=3 bits
Amplitude Shifting Keying and Frequency Shift Keying_4

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