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What is complex baseband representation?
Complex baseband representation of a modulated signal By definition, a passband signal is a signal whose one-sided energy spectrum is centered on non-zero carrier frequency and does not extend to DC.
What is baseband Ethernet?
Baseband refers to the original frequency range of a transmission signal before it is converted, or modulated, to a different frequency range. A common example is the Ethernet protocol, which transfers data using the original baseband signal.
What is quadrature sampling?
Quadrature-sampling is the process of digitizing a continuous (analog) bandpass signal and translating its spectrum to be centered at zero Hz. Let’s see how this popular process works by thinking of a continuous bandpass signal, of bandwidth B, centered about a carrier frequency of fc Hz.
How to convert a passband signal to a baseband signal?
Furthermore, equation (1), provides a practical way to convert a passband signal to its baseband equivalent and vice-versa [Proakis], as illustrated in Figure 1. In the typical communication system model shown in Figure 2 (a), the signals represented are real passband signals.
The passband models and equivalent baseband models, are fundamental models for simulating a communication system. In the passband model, also called as waveform simulation model, the transmitted signal, channel noise and the received signal are all represented by samples of waveforms.
How is a passband signal represented in complex form?
A passband signal or any digitally modulated RF waveform is represented as Recognizing that the sine and cosine terms in the equation (1) are orthogonal components with respect to each other, the signal can be represented in complex form as
Which is an example of a complex baseband model?
Complex Baseband Equivalent Models. The passband models and equivalent baseband models, are fundamental models for simulating a communication system. In the passband model, also called as waveform simulation model, the transmitted signal, channel noise and the received signal are all represented by samples of waveforms.