Converting complex baseband signal to passband signal

1. What is complex baseband signal?
2. Can be used for converting a baseband signal?
3. Which is a baseband to baseband conversion process?
4. Why do we need to convert a baseband signal into bandpass analog signal for transmission?

What is complex baseband signal?

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.

Can be used for converting a baseband signal?

Description. The IQ Demodulator converts an RF signal to baseband signal. I stands for the in-phase component of the signal and Q stands for the quadrature phase component of the signal. You can use the IQ Demodulator to design direct conversion receivers.

Which is a baseband to baseband conversion process?

The process of mixing a baseband signal onto a carrier frequency is called upconversion, and is performed in the radio transmitter. In the radio receiver, the signal is brought back down to baseband in a process called downconversion.

Why do we need to convert a baseband signal into bandpass analog signal for transmission?

Bandpass transmission is done for the modulated signal shifted from baseband frequency to a higher frequecy, and it required in a long distance commmunication. Passband transmission you can do modulation and multiplexing. Because the frequency is high you can use a small antenna. Baseband channel is from 0 to W Hz.