SIMULTANEOUS SIGNAL RECEPTION WITH INTERSPERSED FREQUENCY ALLOCATION

摘要

Methods and circuits can down convert at least a first RF signal on a first path in a first frequency band to provide a first IF signal. A second RF signal on second path in a second frequency band can be down converted to provide a second IF signal. The first IF signal and the second IF signal are interspersed in the frequency domain, and the first frequency band is different from the second frequency band. A combiner can combine at least part of the first IF signal and the second IF signal to provide a combined signal on an output signal path for reception by a digital processing circuit. The first IF signal or second IF signal can be a Zero IF (ZIF), very low IF (VLIF), or Low IF (LIF) signal.

主权项

1. A method for signal processing, comprising:
down converting at least a first RF signal on a first path in a first frequency band to provide a first IF signal comprising a first I component signal and a first Q component signal; down converting at least a second RF signal on a second path in a second frequency band to provide a second IF signal comprising a second I component signal and a second Q component signal, wherein the first IF signal and the second IF signal are interspersed in the frequency domain, the first frequency band being different from the second frequency band; combining the first I component signal and the first Q component signal using a first polyphase filter to provide a third IF signal; combining the second I component signal and the second Q component signal using a second polyphase filter to provide a fourth IF signal; and combining at least part of the third IF signal and the fourth IF signal to provide a combined signal on an output signal path for reception by a digital processing circuit.