Communication device including multiple LO receivers

摘要

Some embodiments of the present disclosure relate to multiband receivers that include at least one divider unit having a divisor that is other-than-two. For example, in some embodiments the divisor is an odd integer (e.g., three). Such divisors allow oscillators for respective receiver subunits in a multi-band receiver to have frequencies that are sufficiently different from one another so as to limit cross-talk interference there between, even when the receiver subunits are concurrently receiving data on adjacent channels. To facilitate this other-than-two divisor, a phase error compensation block is often used to compensate for the effects of using the other-than-two divisor.

主权项

1. A receiver, comprising:
a first signal generator configured to generate a first local oscillator (LO) signal and a first phase-shifted LO signal, wherein the first LO signal and first phase-shifted LO signal both oscillate at a first LO frequency, and phase shift the first LO signal and first phase-shifted LO signal relative to one another by a first predetermined phase shift, wherein the first signal generator comprises a first oscillator configured to provide a first oscillation signal having a first oscillation frequency, and a first frequency divider, having an odd division ratio, configured to convert the first oscillation signal into the first LO signal and the first phase-shifted LO signal such that the first oscillation frequency is equal to the first LO frequency multiplied by an odd integer; and a second signal generator configured to generate a second LO signal and a second phase-shifted LO signal, wherein the second LO signal and second phase-shifted LO signal both oscillate at a second LO frequency that differs from the first LO frequency, and phase shift the second LO signal and the second phase-shifted LO signal relative to one another by a second predetermined phase shift that is predetermined to be substantially different from the first predetermined phase shift.