Patent ID: 8725092

Claim:
An apparatus, comprising a controller for receiving a control signal and indicating an allocation of transmitted channels dependent on the control signal, wherein the allocation of transmitted channels includes multiple non-centered component carriers usable for flexible frequency allocation in an orthogonal frequency-division multiplexing wireless communication signal; a first multiplier configured to convert a first frequency signal into a second frequency signal based at least in part on a first complex-valued local oscillator signal; a pair of low-pass filters controlled by the controller to filter the second frequency signal; a second multiplier configured to convert the filtered second frequency signal into a third frequency signal based at least in part on a second complex-valued local oscillator signal wherein the first frequency signal and the third frequency signal share a frequency position and wherein the pair of low-pass filters is controlled based on the indication of the allocated transmitted channels that include the multiple non-centered component carriers usable for flexible frequency allocation in the orthogonal frequency-division multiplexing wireless communication signal; and a numerically-controlled oscillator controlled by the controller based at least in part on the indication of the allocated transmitted channels, to create the first and second complex-valued local oscillator signal, and wherein one of the first complex-valued local oscillator signal and the second complex-valued local oscillator signal is a complex conjugate of the other complex-valued local oscillator signal.