A method, an apparatus, and a computer program product are provided. The apparatus generates LO signals. The apparatus includes a LO generator module and an injection signal generator module coupled together. The LO generator module has a plurality of LO outputs and a plurality of injection signal inputs. The LO module is configured to generate the LO signals on the LO outputs based on injection signals received on the injection signal inputs. The injection signal generator module has a plurality of LO inputs and a plurality of injection signal outputs. The LO inputs are coupled to the LO outputs. The injection signal outputs are coupled to the injection signal inputs. The injection signal generator module is configured to generate injection signals on the injection signal outputs based on the LO signals received on the LO inputs and based on a received VCO signal.