Receiver/transmitter capable of simultaneously receiving/transmitting discontinuous frequency signals and method thereof

A method capable of simultaneously receiving discontinuous frequency band signal components of an input signal, comprising:

• providing, by a first frequency synthesizer, an in-phase local oscillation differential signal and a quadrature-phase local oscillation differential signal;
• performing frequency down-conversion upon the input signal having discontinuous frequency band signal components comprising a first frequency band signal and a second frequency band signal to generate a first down-converted signal by utilizing the in-phase and quadrature-phase local oscillation differential signals;
• performing the frequency down-conversion upon the input signal to generate a second down-converted signal by using the in-phase local and quadrature-phase oscillation differential signals that have been phase-swapped, wherein the first frequency band signal has a first center frequency and wherein the second frequency band signal has a second center frequency separated from the first center frequency by an offset corresponding to a bandwidth of the first and second frequency bands multiplied by an integer value greater than one, the respective bandwidths of the first and second frequency bands being equal, and wherein a local oscillation frequency for performing the down-conversion is equal to a sum of the first center frequency and half of the offset;
• and
• performing frequency down conversion upon the first and second down-converted signals respectively to generate a first received signal and a second received signal according to an in-phase local oscillation signal and a quadrature-phase local oscillation signal generated by a second frequency synthesizer, wherein a difference between a local oscillation frequency of the second frequency synthesizer and the local oscillation frequency of the first frequency synthesizer is equal to the first center frequency.

A transmitter capable of simultaneously transmitting discontinuous frequency band signal components of an output signal, comprising:

• a first frequency synthesizer, for generating an in-phase local oscillation differential signal and a quadrature-phase local oscillation differential signal;
• an up-conversion circuit, coupled to the first frequency synthesizer, for performing frequency up-conversion upon a first transmitted signal to generate a first up-converted signal by utilizing the in-phase local oscillation differential signal and the quadrature-phase local oscillation differential signal, and performing the frequency up-conversion upon a second transmitted signal to generate a second up-converted signal by utilizing the in-phase local oscillation differential signal and the quadrature-phase local oscillation differential signal that have been phase swapped;
• wherein the first and second up-converted signals respectively correspond to the discontinuous frequency band signal components in the output signal comprising a first frequency band signal and a second frequency band signal, wherein the first frequency band signal has a first center frequency and wherein the second frequency band signal has a second center frequency separated from the first center frequency by an offset corresponding to a bandwidth of the first and second frequency bands multiplied by an integer value greater than one, the respective bandwidths of the first and second frequency bands being equal, and wherein a local oscillation frequency of the first frequency synthesizer is equal to a sum of the first center frequency and half of the offset;
• and
• a processing circuit coupled to the up-conversion circuit, the processing circuit comprising a second frequency synthesizer, wherein a difference between a local oscillation frequency of the second frequency synthesizer and the local oscillation frequency of the first frequency synthesizer is equal to the first center frequency.

A method capable of simultaneously transmitting discontinuous frequency band signal components of an output signal, comprising:

• providing, by a first frequency synthesizer, an in-phase local oscillation differential signal and a quadrature-phase local oscillation differential signal;
• performing frequency up-conversion upon a first transmitted signal to generate a first up-converted signal by utilizing the in-phase local oscillation differential signal and the quadrature-phase local oscillation differential signal;
• performing the frequency up-conversion upon a second transmitted signal to generate a second up-converted signal by utilizing the in-phase local oscillation differential signal and the quadrature-phase local oscillation differential signal that have been phase swapped;
• wherein the first and second up-converted signals respectively correspond to the discontinuous frequency band signal components in the output signal comprising a first frequency band signal and a second frequency band signal, wherein the first frequency band signal has a first center frequency and wherein the second frequency band signal has a second center frequency separated from the first center frequency by an offset corresponding to a bandwidth of the first and second frequency bands multiplied by an integer value greater than one, the respective bandwidths of the first and second frequency bands being equal, and wherein a local oscillation frequency for performing the frequency up-conversion is equal to a sum of the first center frequency and half of the offset;
• and
• performing frequency up-conversion upon a first baseband signal and a second baseband signal respectively to generate the first and second transmitted signals according to an in-phase local oscillation signal and a quadrature-phase local oscillation signal that are generated the a second frequency synthesizer, wherein a difference between a local oscillation frequency of the second frequency synthesizer and the local oscillation frequency of the first frequency synthesizer is equal to the first center frequency.