Low digital intermediate frequency (IF) image cancelling transceiver

1. A method, comprising:

receiving, by a transceiver including a digital intermediate frequency (IF) modulator, an I baseband signal and a Q baseband signal;

cancelling, by the digital IF modulator, an image in the I and Q baseband signals around the direct current (DC) value; and

generating, by the digital IF modulator, a digital IF signal and a Hilbert transform of the digital IF signal.

2. The method of claim 1 , wherein cancelling the image in the I and Q baseband signals includes adding a digital IF with an in-phase and a quadrature phase.

3. The method of claim 2 , wherein the I and Q baseband signals are filtered by an interpolator of the digital IF modulator.

4. The method of claim 1 , further comprising cancelling, by the digital IF modulator, a main upper sideband signal around double a digital IF carrier frequency.

5. The method of claim 1 , further comprising selecting, by the transceiver, a digital IF carrier frequency that is the same as a symbol rate.

6. An apparatus, comprising:

a transceiver including a digital intermediate frequency (IF) modulator;

a memory; and

a processor configured to:

receive, by the transceiver, an I baseband signal and a Q baseband signal;

cancel, by the digital IF modulator, an image in the I and Q baseband signals around the direct current (DC) value; and

generate, by the digital IF modulator, a digital IF signal and a Hilbert transform of the digital IF signal.

7. The apparatus of claim 6 , wherein the processor is further configured to cancel the image in the I and Q baseband signals by adding a digital IF with an in-phase and a quadrature phase.

8. The apparatus of claim 7 , wherein the digital IF modulator includes an interpolator, and the I and Q baseband signals are filtered by the interpolator.

9. The apparatus of claim 6 , wherein the processor is further configured to cancel, by the digital IF modulator, a main upper sideband signal around double a digital IF carrier frequency.

10. The apparatus of claim 6 , wherein the processor is further configured to select, by the transceiver, a digital IF carrier frequency that is the same as a symbol rate.

11. A method, comprising:

receiving, by a transceiver including a digital intermediate frequency (IF) demodulator, a digital IF signal and a Hilbert transform of the digital IF signal;

cancelling, by the digital IF demodulator, an image in the a digital IF signal and a Hilbert transform of the digital IF signal around the direct current (DC) value; and

generating, by the digital IF demodulator, an I baseband signal and a Q baseband signal.

12. The method of claim 11 , wherein a main upper sideband signal is cancelled around double a digital IF carrier frequency.

13. The method of claim 12 , wherein the decimator includes a finite impulse response (FIR) filter.

14. The method of claim 11 , further comprising selecting, by the transceiver, a digital IF carrier frequency that is the same as a symbol rate.

15. An apparatus, comprising:

a transceiver including a digital intermediate frequency (IF) modulator;

a memory; and

a processor configured to:

receive, by a transceiver including a digital IF demodulator, a digital IF signal and a Hilbert transform of the digital IF signal;

cancel, by the digital IF demodulator, an image in the a digital IF signal and a Hilbert transform of the digital IF signal;

cancel, by the digital IF demodulator, a main upper sideband signal around double a digital IF carrier frequency; and

generate, by the digital IF demodulator, an I baseband signal and a Q baseband signal.

16. The apparatus of claim 15 , wherein the image is cancelled around the direct current (DC) value.

17. The apparatus of claim 15 , wherein the decimator includes a finite impulse response (FIR) filter.

18. The apparatus of claim 15 , wherein the processor is further configured to select, by the transceiver, a digital IF carrier frequency that is the same as a symbol rate.