Receiver for receiving a plurality of gnss (global navigation satellite system) signals

A method to process a plurality of received Global Navigation Satellite System (GNSS) signals of different types, each type of said plurality of received GNSS signals arranged according to a different global navigation standard, said method comprising:

• mixing said plurality of received GNSS signals with a local frequency signal to generate a plurality of mixed signals, each of the plurality of mixed signals corresponding to one of the plurality of received GNSS signals, the plurality of mixed signals including at least a first mixed signal derived from a first GNSS signal of a first type and a second mixed signal derived from a second GNSS signal of a second type;
• processing in parallel through a plurality of branches said mixed signals, said processing including:
• in a first branch of said plurality of branches, rejecting an image signal of the first mixed signal with an image rejection filter;
• in the first branch, mixing an output signal from the image rejection filter with a second local frequency signal to derive a first remixed signal;
• and
• in a bypass branch, adjusting said second mixed signal to overlap a band of an adjusted second mixed signal with a band of said first remixed signal;
• and
• concurrently band pass filtering with a low IF filter said adjusted second signal and said first remixed signal.

A non-transitory computer-readable medium containing instructions to execute a method that controls a processing system, said method comprising:

• enabling processing of Global Navigation Satellite System (GNSS) signals from up to four different satellite navigation systems, said four different satellite navigation systems including a Globalnaya navigatsionnaya sputnikovaya sistema (GLONASS) satellite system, a B{hacek over (e)}id{hacek over (o)}u Wèixīng D{hacek over (a)}oháng Xìt{hacek over (o)}ng (BeiDou) satellite system, a Global Position System (GPS) satellite system, and a Galileo satellite system, said processing including:
• mixing received GNSS signals with a first local frequency signal to generate a plurality of mixed signals;
• transforming a first portion of said mixed signals in a first parallel branch, said transforming said first portion of said mixed signals including:
• filtering said first portion of said mixed signals through a band-pass filter having a bandwidth between about 0 MHz and 46 MHz;
• and
• amplifying said filtered first portion of said mixed signals with an automatic gain control (AGC) circuit;
• transforming a second portion of said mixed signals in a second parallel branch, said transforming said second portion of said mixed signals including:
• rejecting image signals of said second portion of said mixed signals with an image rejection filter;
• and
• mixing output signals from said image rejection filter with a second local frequency signal to derive first remixed signals;
• transforming a third portion of said mixed signals in a third parallel branch, said transforming said third portion of said mixed signals including:
• adjusting a phase of said third portion of said mixed signals to overlap a band of said first remixed signals;
• and
• concurrently band pass filtering with a low IF filter said adjusted third portion of said mixed signals and said first remixed signals.