How can a baseband signal have a carrier? Is the “bin” one analysis frequency of many from a DFT?IKnowNada said:I have a baseband signal in IQ form. I have a method to calculate the carrier offset and estimate the carrier bin.
The base bandwidth or the RF bandwidth? Are you modulating or demodulating up or down converting frequency?IKnowNada said:I want to center the carrier to the middle of the bandwidth. How do I do so?
It depends on how you look at it but a Manchester Coded signal would normally be regarded as a baseband signal and yet it basically uses a clock that's at twice the data rate so the spectrum sits about a notional carrier. Manchester coding is a simple example of a coding system that has no DC component. Handy for passing through many kinds of transmission channel or recording system.Baluncore said:How can a baseband signal have a carrier?
Bandwidth refers to the range of frequencies that a signal occupies. For carrier frequency, it is important because it determines the maximum data rate that can be transmitted through a communication channel.
The center frequency can be calculated by finding the average of the upper and lower frequency limits for the bandwidth. For example, if the bandwidth is 100 MHz with a lower limit of 50 MHz and an upper limit of 150 MHz, the center frequency would be (50 MHz + 150 MHz) / 2 = 100 MHz.
Centering the bandwidth for carrier frequency ensures that the signal is transmitted at the most efficient frequency and minimizes interference with other signals. It also allows for easier modulation and demodulation of the signal.
Some common methods include using filters to isolate the desired bandwidth, using frequency mixers to shift the signal to the desired frequency, and using phase-locked loops to lock onto the carrier frequency.
The center frequency can be adjusted by changing the parameters of the filters, frequency mixers, or phase-locked loops, depending on the method being used. It is important to carefully select the appropriate values to achieve the desired center frequency.