| CPC G01S 19/31 (2013.01) [G01S 19/115 (2019.08); G01S 19/28 (2013.01)] | 20 Claims |
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1. A preprocessing system of a global navigation satellite system (GNSS) chip comprising:
a first interface corresponding to a first frequency band in the GNSS chip;
a second interface corresponding to a second frequency band in the GNSS chip;
a filter comprising:
a first end;
a second end; and
a first connecting end coupled to the second interface;
a first port comprising:
a third end; and
a fourth end configured to either suspend or couple to a first antenna of a terminal device,
wherein the first port is configured to receive, using the first antenna, a first positioning signal in the first frequency band;
a first switch comprising:
a fifth end coupled to the third end;
a sixth end coupled to the second end; and
a second connecting end coupled to the first interface,
wherein the first switch is configured to:
couple the first port and the first interface when the fourth end is coupled to the first antenna; and
couple the filter and the first interface when the fourth end is suspended; and
a second port comprising:
an eighth end coupled to the first end; and
a ninth end coupled to a second antenna of the terminal device,
wherein the second port is configured to:
receive, using the second antenna, a first signal comprising the first positioning signal and a second positioning signal in the second frequency band when the fourth end is suspended; and
receive, using the second antenna, a second signal comprising the second positioning signal when the fourth end is coupled to the first antenna, and
wherein the filter is configured to:
filter the first signal when the fourth end is suspended to obtain the first positioning signal and the second positioning signal, provide the first positioning signal to the first switch, and provide the second positioning signal to the second interface; and
provide the second positioning signal to the second interface when the fourth end is coupled to the first antenna.
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