- #1
Fiona Rozario
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Why not work with the complete signal, instead of breaking it into in-phase and quadrature components?
Why do we need in-phase & quadrature components of a signal?
- Context: Undergrad
- Thread starter Fiona Rozario
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SUMMARY
The discussion emphasizes the importance of in-phase and quadrature components of a signal for effective signal processing. These components are orthogonal, allowing for independent manipulation, which is particularly useful in scenarios such as recovering multiple AM signals transmitted on quadrature carriers. Working with these components facilitates operations in the frequency domain, making certain processes simpler, especially when dealing with lower frequency versions of the signal, such as demodulated or intermediate frequencies. Familiarity with complex numbers is essential for understanding these processes.
PREREQUISITES- Understanding of in-phase and quadrature components in signal processing
- Knowledge of amplitude modulation (AM) techniques
- Familiarity with complex numbers and their application in frequency domain analysis
- Basic concepts of signal demodulation and intermediate frequency processing
- Research the principles of quadrature amplitude modulation (QAM)
- Learn about the Fast Fourier Transform (FFT) for frequency domain analysis
- Explore the concept of orthogonality in signal processing
- Study demodulation techniques for signals in the frequency domain
Signal processing engineers, telecommunications professionals, and anyone involved in the design and analysis of communication systems will benefit from this discussion.
- #2
Dale
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Usually that is done because you want to work with a lower frequency version of the signal. Either demodulated to baseband or to some Intermediate frequency.
- #3
sophiecentaur
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It is quite possible to deal with the signal as it comes - a variation of Voltage with time. Some processes are just easier to accomplish in the frequency domain and using complex numbers. When I say "easier", that assumes that your a familiar with that stuff. If you aren't then those processes could be pretty hard to comprehend in either time or frequency domains. It gets difficult pretty rapidly. 
I guess a simple answer is that quadrature components of a signal; are orthogonal to each other and the components can be treated separately and independently. You could, for example, get two AM signals transmitted together on quadrature carriers and then recover them separately. But you would need to keep the quadrature relationship going throughout the process.
I guess a simple answer is that quadrature components of a signal; are orthogonal to each other and the components can be treated separately and independently. You could, for example, get two AM signals transmitted together on quadrature carriers and then recover them separately. But you would need to keep the quadrature relationship going throughout the process.
- #4
Fiona Rozario
- 52
- 1
Thank you...DaleSpam said:
- #5
Fiona Rozario
- 52
- 1
Thank you...sophiecentaur said:It is quite possible to deal with the signal as it comes - a variation of Voltage with time. Some processes are just easier to accomplish in the frequency domain and using complex numbers. When I say "easier", that assumes that your a familiar with that stuff. If you aren't then those processes could be pretty hard to comprehend in either time or frequency domains. It gets difficult pretty rapidly.
I guess a simple answer is that quadrature components of a signal; are orthogonal to each other and the components can be treated separately and independently. You could, for example, get two AM signals transmitted together on quadrature carriers and then recover them separately. But you would need to keep the quadrature relationship going throughout the process.
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