Quadrature modulation allows us to increase the transmission rate on a modulated carrier by:Question 2Select one:independently modulating two carriers of the same frequency but different amplitudesreducing pulse widthincreasing SNRindependently modulating two carriers of the same frequency but orthogonal in phaseusing twice the frequency range
Question
Quadrature modulation allows us to increase the transmission rate on a modulated carrier by:Question 2Select one:independently modulating two carriers of the same frequency but different amplitudesreducing pulse widthincreasing SNRindependently modulating two carriers of the same frequency but orthogonal in phaseusing twice the frequency range
Solution
Quadrature modulation allows us to increase the transmission rate on a modulated carrier by independently modulating two carriers of the same frequency but orthogonal in phase.
Here's why:
Quadrature modulation, also known as QAM (Quadrature Amplitude Modulation), is a method used to increase the efficiency of data transmission. It does this by modulating two carrier waves of the same frequency but 90 degrees out of phase with each other (i.e., they are orthogonal).
Each of these waves can be modulated independently, effectively allowing two separate signals to be transmitted simultaneously on the same frequency band. This doubles the capacity of the channel, increasing the transmission rate without needing to increase the bandwidth or power.
So, the correct answer is: independently modulating two carriers of the same frequency but orthogonal in phase.
Similar Questions
Which of the following is true concerning quadrature modulation?Question 4Select one:It uses twice the bandwidth compared with modulation of just the in-phase component.It reduced the power requirements compared with an ASK systemIt allows doubling of the transmitted bit rate by modulating in-phase and quadrature components of the carrier.It halves the transmitted bit rate compared with an ASK system, but is more reliable (lower BER) for the same signal power.
In Frequency Modulation –*2 pointsAmplitude of the carrier remains sameFrequency of the carrier varies in accordance with the modulating signalThe number of side bands are infinite
Sinusoidal carrier signals may be modulated with information to be communicated, by influencing:Question 2Answerthe carrier frequencythe carrier phaseboth phase and amplitude togetherthe carrier amplitude
In Frequency Modulation
MODULATION IS REQUIRED FORSelect one:a. ALL OF THE ABOVEb. MULTIPLEXING THE SIGNALSc. REDUCING NOISE WHILE TRANSMISSIONd. REDUCTION OF ANTENNA HEIGHTe. REDUCTION IN THE COMPLEXITY OF CIRCUITRY
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