| 摘要 |
A method, an apparatus, and system for filtering a signal in a carrier aggregation system are provided. The apparatus processes carriers via at least two respective paths. Each path receives, via a transconducting module, an input signal and generates a current signal based on the input signal, shifts, via a mixing module, a frequency of the current signal by mixing the current signal with a local oscillating signal corresponding to a respective path, and generates, via an amplifying module, an output voltage signal based on the frequency-shifted signal and a response of the respective path. The apparatus attenuates, via a filtering module, a jamming signal in the input signal to produce responses for the at least two paths, respectively. A response for the respective path has a maximum input impedance at a frequency of the local oscillating signal corresponding to the respective path. |
| 主权项 |
1. An apparatus for filtering a signal in a carrier aggregation system, comprising:
at least two paths configured to process a respective carrier, each path comprising:
a transconducting module configured to receive an input signal and generate a current signal based on the input signal,a mixing module configured to shift a frequency of the current signal by mixing the current signal with a local oscillating signal corresponding to a respective path, andan amplifying module configured to generate an output voltage signal based on the frequency-shifted signal; and a filtering module configured to attenuate a jamming signal in the input signal to produce responses for the at least two paths, respectively, wherein a response for the respective path has a maximum input impedance at a frequency of the local oscillating signal corresponding to the respective path, wherein the amplifying module of the respective path is configured to generate the output voltage signal based on the response of the respective path. |
