Patent ID: 11953606
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G

Claim 3:
4. The preprocessing system of claim 2, further comprising:
a third interface corresponding to a third frequency band in the GNSS chip;
a third port comprising:
an eleventh end; and
a twelfth end configured to either suspend or couple to a third antenna of the terminal device,

wherein the third port is configured to receive, using the third antenna, a third positioning signal in the third frequency band; and
a second switch comprising:
a thirteenth end coupled to the eleventh end;
a fourteenth end coupled to a fifteenth end of the filter;
a sixteenth end; and
a third connecting end coupled to the third interface,

wherein the second switch is configured to:
couple the third port and the third interface when the twelfth end is coupled to the third antenna; and
couple the filter and the third interface when the twelfth end is suspended,

wherein the first signal and the second signal further comprise the third positioning signal when the twelfth end is suspended, and
wherein the filter is further configured to:
filter the first signal when the fourth end and the twelfth end are suspended to obtain the third positioning signal, and provide the third positioning signal to the second switch; and
filter the second signal when the fourth end is coupled to the first antenna and the twelfth end is suspended to obtain the third positioning signal, and provide the third positioning signal to the second switch.