CN102288976A - Global positioning system (GPS) and global navigation satellite system (GLONASS) multimode signal selection method and multiplexer - Google Patents
Global positioning system (GPS) and global navigation satellite system (GLONASS) multimode signal selection method and multiplexer Download PDFInfo
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- CN102288976A CN102288976A CN201110158612XA CN201110158612A CN102288976A CN 102288976 A CN102288976 A CN 102288976A CN 201110158612X A CN201110158612X A CN 201110158612XA CN 201110158612 A CN201110158612 A CN 201110158612A CN 102288976 A CN102288976 A CN 102288976A
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Abstract
The invention discloses a global positioning system (GPS) and global navigation satellite system (GLONASS) multimode signal selection method and a multiplexer. The multiplexer comprises two working modes: 16-byte binary data mode (multiplexing mode) and 8-byte quaternary data mode (2 multiplying 2 complex multiplexing mode), wherein in the binary data mode, an analog-digital converter supports the input of three formats: unsigned binary system, sign and magnitude, or binary complementary code; and the formats can be configured as binary multiplexing input (16 input channels) or binary complex signal I&Q (8 input channels) after being input into a multiplexing switch of the analog-digital converter.
Description
Technical field
The present invention relates to the satellite-signal tracing system, mainly be meant a kind of GPS and GLONASS multimode signal selection method and multiplexer.
Background technology
Known GPS adopts CDMA signals, and GLONASS adopts frequency division multiple address signal, and the two adheres to different navigational satellite systems separately, and diverse signal encoding and transmission mode are arranged.Traditional satellite-signal tracing system can only receive GPS or GLONASS signal separately, can not receive GPS and GLONASS signal simultaneously.
Summary of the invention
Purpose of the present invention just provides a kind of GPS and GLONASS multimode signal selection method and multiplexer, by 16 binary datas (multiplexing modes), 8 quaternary data (2 take advantage of 2 complicated multiplexing modes) have overcome the deficiency that prior art exists preferably.
Realize that method of the present invention is: comprise two kinds of mode of operations: 16 binary data (multiplexing modes), 8 quaternary data (2 take advantage of 2 complicated multiplexing modes), under the binary data pattern, analog to digital converter is supported the input of three kinds of forms: no symbol scale-of-two, symbol and value, perhaps two's complement, input analog-to-digital converter multiplexer switch can be configured to the input of two cell multiplexings (16 inputting channel) or binary complex signal I﹠amp; Q (8 inputting channel).
Realize that multiplexer of the present invention is: comprise the analog to digital converter multiplexer switch, this analog to digital converter multiplexer switch comprises multiple signals input port, multiple signals output port, sampling thief, demoder, analog to digital converter, and wherein the multiple signals input port connects the multiple signals output port through sampling thief, demoder, analog to digital converter.This switch can be accepted the chip of different frequency, the circuit of coding control etc.
The beneficial effect that the present invention has: adopt 16 binary data (multiplexing modes), 8 quaternary data (2 take advantage of 2 complicated multiplexing modes) have realized that a receiver can receive GPS and GLONASS multi-channel signal simultaneously.
Description of drawings
Fig. 1 is a receiver block diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing:
Analog to digital converter multiplexer switch (ADC multiplexer)
The analog to digital converter multiplexer switch is programmable, two kinds of mode of operations are arranged: 16 binary data (multiplexing modes), 8 quaternary data (2 take advantage of 2 complicated multiplexing modes). under the binary data pattern, analog to digital converter is supported the input of three kinds of forms: no symbol scale-of-two, symbol and value, perhaps two's complement input analog-to-digital converter multiplexer switch can be configured to the input of two cell multiplexings (16 inputting channel) or binary complex signal I﹠amp; Q (8 inputting channel)
The data representation frequency is at the bandpass signal of 1MHz to 19MHz, and this signal is by the sample frequency sampling with 40MHz, thereby raising frequency is to 21MHz to 39MHz
Signal source is selected multiplexer (Source Selector Multiplexer)
The signal source selector switch is a multiplexer.Two input signals (referring to the form of CHx_SIG_SEL register) of which 16 1 groups are used in its decision
CHx_SIG_SEL，
MULTI_SIG_SEL，
ALL_SIG_SEL
(writing the address)
Bit 22 to 20: select analog to digital conversion inputted search 4 bits-31:28,27:24
Bit 19: select analog to digital conversion Searching I input quantity bit-I or Q.
Bit 18: select analog to digital conversion search Q input quantity bit-Q or I.
Bit 17: reversing I﹠amp; Q imports highest significant position-I[1] and Q[1].
Bit 16: I﹠amp; Q imports SIG, and MAGN is transformed into.
Bits 15 to 14: select input signal.Referring to table 20.
Bits 13,12: not using for channel 1 to 49, is the control of GPS L2 code generator for channel 49 to 60 still.
Bit 11: broadband, arrowband correlator switch.
Bits 10 to 8: do not use.
Bit 7 to 0: the coding of arrowband converter programming.
Table 20
Table 20a.
Claims (3)
1. GPS and GLONASS multimode signal selection method, it is characterized in that comprising two kinds of mode of operations: 16 binary data (multiplexing modes), 8 quaternary data (2 take advantage of 2 complicated multiplexing modes), under the binary data pattern, analog to digital converter is supported the input of three kinds of forms: no symbol scale-of-two, symbol and value, perhaps two's complement, the input analog-to-digital converter multiplexer switch can be configured to the input of two cell multiplexings (16 inputting channel) or binary complex signal I﹠amp; Q (8 inputting channel).
2. GPS as claimed in claim 1 and GLONASS multimode signal selection method is characterized in that also comprising
CHx_SIG_SEL，
MULTI_SIG_SEL，
ALL_SIG_SEL
(writing the address)
Bit 22 to 20: select analog to digital conversion inputted search 4 bits-31:28,27:24
Bit 19: select analog to digital conversion Searching I input quantity bit-I or Q;
Bit 18: select analog to digital conversion search Q input quantity bit-Q or I;
Bit 17: reversing I﹠amp; Q imports highest significant position-I[1] and Q[1];
Bit 16: I﹠amp; Q imports SIG, and MAGN is transformed into;
Bits 15 to 14: select input signal;
Bits 13,12: not using for channel 1 to 49, is the control of GPS L2 code generator for channel 49 to 60 still;
Bit 11: broadband, arrowband correlator switch;
Bits 10 to 8: do not use;
Bit 7 to 0: the coding of arrowband converter programming.
3. realize the GPS of claim 1 and the multiplexer of GLONASS multimode signal selection method, it is characterized in that comprising the analog to digital converter multiplexer switch, this analog to digital converter multiplexer switch comprises multiple signals input port, multiple signals output port, sampling thief, demoder, analog to digital converter, wherein the multiple signals input port connects the multiple signals output port through sampling thief, demoder, analog to digital converter, can accept the circuit of different frequency, different coding control conducting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110158612XA CN102288976A (en) | 2010-05-31 | 2011-05-31 | Global positioning system (GPS) and global navigation satellite system (GLONASS) multimode signal selection method and multiplexer |
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| CN201010188163 | 2010-05-31 | ||
| CN201010188163.9 | 2010-05-31 | ||
| CN201110158612XA CN102288976A (en) | 2010-05-31 | 2011-05-31 | Global positioning system (GPS) and global navigation satellite system (GLONASS) multimode signal selection method and multiplexer |
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| CN102288976A true CN102288976A (en) | 2011-12-21 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5923287A (en) * | 1997-04-01 | 1999-07-13 | Trimble Navigation Limited | Combined GPS/GLONASS satellite positioning system receiver |
| US20060227905A1 (en) * | 2005-04-12 | 2006-10-12 | Waldemar Kunysz | Spatial and time multiplexing of multi-band signals |
| CN101198160A (en) * | 2007-05-25 | 2008-06-11 | 北京大学 | Method and device for implementing GNSS multi-module parallelism receiving at front end by using single path radio frequency |
| CN202103655U (en) * | 2010-05-31 | 2012-01-04 | 北京联星科通微电子技术有限公司 | GPS and GLONASS multiplexer compatible with multi-channel receiver |
-
2011
- 2011-05-31 CN CN201110158612XA patent/CN102288976A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5923287A (en) * | 1997-04-01 | 1999-07-13 | Trimble Navigation Limited | Combined GPS/GLONASS satellite positioning system receiver |
| US20060227905A1 (en) * | 2005-04-12 | 2006-10-12 | Waldemar Kunysz | Spatial and time multiplexing of multi-band signals |
| CN101198160A (en) * | 2007-05-25 | 2008-06-11 | 北京大学 | Method and device for implementing GNSS multi-module parallelism receiving at front end by using single path radio frequency |
| CN202103655U (en) * | 2010-05-31 | 2012-01-04 | 北京联星科通微电子技术有限公司 | GPS and GLONASS multiplexer compatible with multi-channel receiver |
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Application publication date: 20111221 |