CN116886123B - Multi-signal transmission method, device, equipment and storage medium - Google Patents
Multi-signal transmission method, device, equipment and storage medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
Abstract
The embodiment of the disclosure provides a multi-signal transmission method, a device, equipment and a storage medium. The method comprises the following steps: acquiring a plurality of original signals; wherein, the plurality of original signals comprise uplink remote control signals, uplink ranging signals and uplink data transmission signals; the multi-signal modulation module is used for carrying out baseband spread spectrum modulation on various original signals to obtain various initial modulation signals; the power of various initial modulation signals is regulated through a power regulation module, and various signals with regulated power are obtained; and carrying out quadrature modulation on the signals subjected to various power adjustments through an unbalanced modulation module to obtain a target modulation signal so as to transmit the target modulation signal to a satellite. According to the embodiment of the disclosure, three signals of an uplink remote control signal, an uplink ranging signal and an uplink data transmission signal can be transmitted on one uplink physical channel at the same time.
Description
Technical Field
The embodiment of the disclosure relates to the technical field of satellite mobile communication, in particular to a multi-signal transmission method, a device, equipment and a storage medium.
Background
Satellite mobile communication is entering our daily life, and as a control channel of a satellite, measurement and control communication is an essential loop of satellite communication all the time. With the diversification of satellite services, the demand for uplink functions is increasing, and due to the limited spectrum resources, satellite uplink usually multiplexes the measurement and control uplink channels for data transmission.
The current satellite is gradually converted from a unified carrier measurement and control system to a spread spectrum measurement and control system. The spread spectrum measurement and control system has stronger anti-interference capability and confidentiality, and integrates remote control, ranging and data transmission functions. The spread spectrum measurement and control system cannot simultaneously use uplink transmission, remote control and ranging functions on one uplink physical channel, and can only be used in a time-sharing mode, so that the three functions cannot be simultaneously realized in one station passing window or the effective service time of a certain function is necessarily reduced.
Disclosure of Invention
The embodiment of the disclosure provides a multi-signal transmission method, a device, equipment and a storage medium, which can enable multiple signals to be transmitted on one physical channel at the same time.
In a first aspect, an embodiment of the present disclosure provides a multi-signal transmission method, including: acquiring a plurality of original signals; wherein the plurality of original signals comprise an uplink remote control signal, an uplink ranging signal and an uplink data transmission signal; the multi-signal modulation module is used for carrying out baseband spread spectrum modulation on the plurality of original signals to obtain a plurality of initial modulation signals; the power of the plurality of initial modulation signals is regulated through a power regulating module, and a plurality of signals with regulated power are obtained; and carrying out quadrature modulation on the signals subjected to the multiple power adjustments through an unbalanced modulation module to obtain a target modulation signal, so as to transmit the target modulation signal to a satellite.
In a second aspect, embodiments of the present disclosure further provide a multi-signal transmission apparatus, including: the signal acquisition module is used for acquiring various original signals; wherein the plurality of original signals comprise an uplink remote control signal, an uplink ranging signal and an uplink data transmission signal; the multi-signal modulation module is used for carrying out baseband spread spectrum modulation on the plurality of original signals to obtain a plurality of initial modulation signals; the power adjusting module is used for adjusting the power of the plurality of initial modulation signals to obtain a plurality of signals after power adjustment; and the unbalanced modulation module is used for carrying out quadrature modulation on the signals subjected to the multiple power adjustments to obtain a target modulation signal so as to transmit the target modulation signal to a satellite.
In a third aspect, embodiments of the present disclosure further provide an electronic device, including:
one or more processors;
storage means for storing one or more programs,
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the multi-signal transmission method as described in embodiments of the present disclosure.
In a fourth aspect, the disclosed embodiments also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, are for performing a multi-signal transmission method as described in the disclosed embodiments.
According to the technical scheme disclosed by the embodiment, various original signals are obtained; wherein the plurality of original signals comprise an uplink remote control signal, an uplink ranging signal and an uplink data transmission signal; the multi-signal modulation module is used for carrying out baseband spread spectrum modulation on the plurality of original signals to obtain a plurality of initial modulation signals; the power of the plurality of initial modulation signals is regulated through a power regulating module, and a plurality of signals with regulated power are obtained; and carrying out quadrature modulation on the signals subjected to the multiple power adjustments through an unbalanced modulation module to obtain a target modulation signal, so as to transmit the target modulation signal to a satellite. According to the method and the device, baseband spread spectrum modulation is carried out on various original signals through the multi-signal modulation module, power of various initial modulation signals is regulated through the power regulation module, and orthogonal modulation is carried out on signals with various regulated powers through the unbalanced modulation module, so that three signals of an uplink remote control signal, an uplink ranging signal and an uplink uploading signal can be transmitted on one uplink physical channel at the same time.
Drawings
The above and other features, advantages, and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. The same or similar reference numbers will be used throughout the drawings to refer to the same or like elements. It should be understood that the figures are schematic and that elements and components are not necessarily drawn to scale.
Fig. 1 is a schematic diagram illustrating transmission effects of a conventional uplink remote control signal and a conventional uplink ranging signal;
FIG. 2 is a diagram illustrating the transmission effect of a conventional uplink signal;
fig. 3 is a schematic flow chart of a multi-signal transmission method according to an embodiment of the present invention;
fig. 4 is a schematic diagram of another multi-signal transmission method according to an embodiment of the present invention;
FIG. 5 is a flowchart of calculating a target range of power coefficients according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating error rates of measurement and control channels according to an embodiment of the present invention;
FIG. 7a is a diagram of code discriminator output provided by an embodiment of the invention;
FIG. 7b is a diagram of code tracking errors according to an embodiment of the present invention;
FIG. 7c is a diagram of the output of the carrier phase discriminator according to the embodiment of the invention;
fig. 7d is a diagram of carrier tracking error according to an embodiment of the present invention;
FIG. 8a is a graph of output of a measurement and control channel correlator according to an embodiment of the present invention;
FIG. 8b is a graph of another measurement and control channel correlator output provided by an embodiment of the present invention;
fig. 9 is a diagram of demodulation error rate of a data transmission channel signal according to an embodiment of the present invention;
fig. 10 is a diagram of output of a data transmission channel correlator according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a multi-signal transmission device according to an embodiment of the disclosure;
Fig. 12 is a schematic structural diagram of an electronic device according to an embodiment of the disclosure.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure have been shown in the accompanying drawings, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustration purposes only and are not intended to limit the scope of the present disclosure.
It should be understood that the various steps recited in the method embodiments of the present disclosure may be performed in a different order and/or performed in parallel. Furthermore, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present disclosure is not limited in this respect. It should be noted that the terms "first," "second," and the like in this disclosure are merely used to distinguish between different devices, modules, or units and are not used to define an order or interdependence of functions performed by the devices, modules, or units. It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those of ordinary skill in the art will appreciate that "one or more" is intended to be understood as "one or more" unless the context clearly indicates otherwise. It will be appreciated that the data (including but not limited to the data itself, the acquisition or use of the data) involved in the present technical solution should comply with the corresponding legal regulations and the requirements of the relevant regulations.
Fig. 1 is a schematic diagram illustrating transmission effects of a conventional uplink remote control signal and a conventional uplink ranging signal. Fig. 2 is a schematic diagram of the transmission effect of the conventional uplink signal. As shown in fig. 1 and 2, when the conventional uplink data transmission, the conventional uplink remote control and the conventional uplink ranging signal are transmitted on the uplink physical channel, the conventional uplink remote control and the conventional uplink ranging signal need to be used in a time-sharing manner, and only one function can be used in one station passing window. When using remote control, ranging functions, unbalanced Quadrature Phase Shift Keying (UQPSK) modulation is required for the remote control signal and the ranging signal, where the I branch modulates the remote control spread spectrum signal and the Q branch modulates the ranging spread spectrum signal. When the uplink function is used, the uplink physical channels transmit only the uplink signal, typically using Quadrature Phase Shift Keying (QPSK) modulation. Therefore, in the prior art, the spread spectrum measurement and control system cannot use the functions of data transmission, remote control and ranging on one uplink physical channel at the same time, and can only be used in a time sharing way.
Fig. 3 is a schematic flow chart of a multi-signal transmission method according to an embodiment of the present invention; the embodiment is applicable to the case that three signals, namely, uplink remote control, uplink ranging and uplink data transmission, are transmitted in an uplink physical channel in a spread spectrum measurement and control system, and the method can be executed by a multi-signal transmission device and specifically comprises the following steps:
S310, acquiring various original signals.
The plurality of original signals comprise an uplink remote control signal, an uplink ranging signal and an uplink data transmission signal. In this embodiment, the executing body may be a ground station, and the ground station may acquire various original signals.
S320, performing baseband spread spectrum modulation on the multiple original signals through a multiple signal modulation module to obtain multiple initial modulation signals.
Wherein the plurality of initial modulation signals includes a first spread spectrum modulation signal, a second spread spectrum modulation signal, and a third baseband signal. In this embodiment, the uplink remote control signal, the uplink ranging signal and the uplink signal may be simultaneously baseband spread spectrum modulated by the multi-signal modulation module to obtain a first spread spectrum modulated signal, a second spread spectrum modulated signal and a third baseband signal.
Optionally, the multi-signal modulation module performs baseband spread spectrum modulation on the multiple original signals to obtain multiple initial modulation signals, including: acquiring a remote control data bit stream of the uplink remote control signal, a first spread spectrum code, a ranging data bit stream of the uplink ranging signal, a second spread spectrum code and a data transmission data bit stream of the uplink ranging signal; performing baseband modulation on the remote control data bit stream through a first baseband modulation unit to obtain a first baseband signal; the first spread spectrum code is subjected to baseband modulation through a second baseband modulation unit, and a first spread spectrum signal is obtained; performing baseband modulation on the ranging data bit stream through a third baseband modulation unit to obtain a second baseband signal; performing baseband modulation on the second spread spectrum code through a fourth baseband modulation unit to obtain a second spread spectrum signal; performing baseband modulation on the data bit stream through a fifth baseband modulation unit to obtain a third baseband signal; performing spread spectrum modulation on the baseband signal and the first spread spectrum signal through a first spread spectrum modulation unit to obtain a first spread spectrum modulation signal;
And performing spread spectrum modulation on the two baseband signals and the second spread spectrum signal through a second spread spectrum modulation unit to obtain a second spread spectrum modulation signal.
Fig. 4 is a schematic diagram of another multi-signal transmission method according to an embodiment of the present invention. As shown in fig. 4, the multi-signal modulation module includes a first baseband modulation unit, a second baseband modulation unit, a third baseband modulation unit, a fourth baseband modulation unit, a fifth baseband modulation unit, a first spread modulation unit, and a second spread modulation unit. The baseband modulation unit in the multi-signal modulation module is used for performing baseband waveform coding modulation on the baseband data stream to generate a baseband signal and a spread spectrum signal respectively. And the spread spectrum modulation unit in the multi-signal modulation module is used for multiplying the spread spectrum signal with the baseband signal to realize the spread spectrum modulation of the baseband signal and generate a spread spectrum modulation signal. Specifically, for the multi-signal modulation module, firstly, a remote control data bit stream of the uplink remote control signal, a first spread spectrum code, a ranging data bit stream of the uplink ranging signal, a second spread spectrum code and a data transmission data bit stream of the uplink ranging signal are obtained. Then the first baseband modulation unit, the second baseband modulation unit, the third baseband modulation unit, the fourth baseband modulation unit and the fifth baseband modulation unit work simultaneously: the remote control data bit stream is subjected to baseband modulation by a first baseband modulation unit to obtain a first baseband signal s 01 (t); the first spread spectrum code is subjected to baseband modulation through a second baseband modulation unit to obtain a first spread spectrum signal C 01 (t); the ranging data bit stream is subjected to baseband modulation by a third baseband modulation unit to obtain a second baseband signal s 02 (t); the second spread spectrum code is fed through a fourth baseband modulation unitLine baseband modulation to obtain a second spread spectrum signal C 02 (t); the data transmission data bit stream is subjected to baseband modulation through a fifth baseband modulation unit, and if the data transmission data bit stream is not subjected to shaping filtering, an unfiltered third baseband signal s is obtained 04 (t) obtaining a third baseband signal s if subjected to shaping filtering 4 (t) subsequently, the first spread modulation unit and the second spread modulation unit operate simultaneously: the baseband signal and the first spread spectrum signal are spread and modulated by a first spread spectrum modulation unit, and are subjected to shaping filtering to obtain a first spread spectrum modulation signal s 1 (t); the second spread spectrum modulation unit spreads the two baseband signals and the second spread spectrum signal, and the second spread spectrum modulation signal s is obtained through shaping and filtering 2 (t)。
S330, adjusting the power of the plurality of initial modulation signals through a power adjusting module to obtain a plurality of signals after power adjustment.
Wherein the plurality of power adjusted signals includes a first power adjusted signal and a second power adjusted signal. In this embodiment, the power adjustment module adjusts the power of the first spread spectrum modulation signal, the second spread spectrum modulation signal and the third baseband signal at the same time, so as to obtain a signal after the first power adjustment and a signal after the second power adjustment. Specifically, the power of the first spread spectrum modulation signal and the power of the second spread spectrum modulation signal are adjusted to obtain a first power signal and a second power signal, the first power signal and the second power signal are synthesized to obtain a synthesized power signal, and the power of the synthesized power signal is adjusted again to obtain a signal after the first power adjustment. And adjusting the power of the third baseband signal to obtain a signal with the second adjusted power.
Optionally, adjusting, by the power adjustment module, the power of the plurality of initial modulation signals to obtain a plurality of signals after power adjustment, including: determining a power proportioning coefficient; the power proportioning coefficient comprises a first power coefficient, a second power coefficient, a third power coefficient and a fourth power coefficient; the first power adjustment unit is used for carrying out power adjustment on the first spread spectrum modulation signal by combining the first power coefficient to obtain a first power signal; performing power adjustment on the second spread spectrum modulation signal by combining the second power coefficient through a second power adjustment unit to obtain a second power signal; the power of the signal synthesized by the first power signal and the second power signal is regulated by combining a third power coefficient through a third power regulating unit, so that a signal after the first power regulation is obtained; and carrying out power adjustment on the third baseband signal by combining the fourth power coefficient through a fourth power adjustment unit to obtain a signal after the second power adjustment.
As illustrated in fig. 4, the power adjustment module includes a first power adjustment unit, a second power adjustment unit, a third power adjustment unit, and a fourth power adjustment unit. For the power regulation module, the first power coefficient p is regulated by a first power regulation unit 1 And said first spread spectrum modulated signal s 1 (t) multiplying to obtain a first power signal p 1 *s 1 (t); the second power coefficient p is regulated by a second power regulating unit 2 And said second spread spectrum modulated signal s 2 (t) multiplying to obtain a second power signal p 2 *s 2 (t); the third power coefficient p is regulated by a third power regulating unit 3 A signal s synthesized with the first power signal and the second power signal 3 (t) obtaining a first power adjusted signal p 3 *s 3 (t); the fourth power coefficient p is adjusted by a fourth power adjusting unit 4 And the third baseband signal s 4 (t) multiplying to obtain a second power-adjusted signal p 4 *s 4 (t)。
Optionally, determining the power proportioning factor includes: acquiring a target range of a first power coefficient, a target range of a second power coefficient, a target range of a third power coefficient and a target range of a fourth power coefficient; determining the first power coefficient according to the target range of the first power coefficient; determining the second power coefficient according to the target range of the second power coefficient; determining the third power coefficient according to the target range of the third power coefficient; and determining the fourth power coefficient according to the target range of the fourth power coefficient.
In this embodiment, the target range of the first power coefficient, the target range of the second power coefficient, the target range of the third power coefficient, and the target range of the fourth power coefficient may be determined through simulation; determining the first power coefficient p according to the target range of the first power coefficient 1 The method comprises the steps of carrying out a first treatment on the surface of the Determining the second power coefficient p according to the target range of the second power coefficient 2 The method comprises the steps of carrying out a first treatment on the surface of the Determining the third power coefficient p according to the target range of the third power coefficient 3 The method comprises the steps of carrying out a first treatment on the surface of the Determining the fourth power coefficient p according to the target range of the fourth power coefficient 4 。
Optionally, obtaining the target range of the first power coefficient, the target range of the second power coefficient, the target range of the third power coefficient, and the target range of the fourth power coefficient includes: setting a range of the first power coefficient, a range of the second power coefficient, a range of the third power coefficient and a range of the fourth power coefficient; receiving a simulated error rate; if the first branch signal is not captured, adjusting at least one of the range of the first power coefficient, the range of the second power coefficient, the range of the third power coefficient and the range of the fourth power coefficient until the first branch signal is captured; if the first branch signal is captured and the second branch signal is not captured, adjusting at least one of the range of the first power coefficient, the range of the second power coefficient, the range of the third power coefficient and the range of the fourth power coefficient until the second branch signal is captured; if a second branch signal is captured and the simulated error rate does not fall into a set interval, adjusting at least one of the range of the first power coefficient, the range of the second power coefficient, the range of the third power coefficient and the range of the fourth power coefficient until the simulated error rate falls into the set interval; if the simulated error rate falls into a set interval, taking the range of the latest adjusted first power coefficient as a target range of the first power coefficient, taking the range of the latest adjusted second power coefficient as a target range of the second power coefficient, taking the range of the latest adjusted third power coefficient as a target range of the third power coefficient and taking the range of the latest adjusted fourth power coefficient as a target range of the fourth power coefficient.
Optionally, before setting the range of the first power coefficient, the range of the second power coefficient, the range of the third power coefficient, and the range of the fourth power coefficient, the method further includes: obtaining simulation configuration parameters; wherein the simulation configuration parameters include information rates of the first baseband signal, the second baseband signal, and the unfiltered third baseband signal; a code rate of the first spread spectrum signal and the second spread spectrum signal; the sampling rate of the first spread spectrum modulated signal, the second spread spectrum modulated signal, and the third baseband signal; modulation modes of the multi-signal modulation module; channel type.
Fig. 5 is a flowchart illustrating calculation of a target range of power coefficients according to an embodiment of the present invention.
S510, acquiring simulation configuration parameters.
In this embodiment, the simulation configuration parameters are specific parameters obtained according to an actual system. Wherein the simulation configuration parameters comprise a first baseband signal s 01 (t), second baseband signal s 02 (t) unfiltered third baseband signal s 04 The information rate of (t); first spread spectrum signal C 01 (t) and a second spread spectrum signal C 02 The code rate of (t); first spread spectrum modulated signal s 1 (t), a second spread spectrum modulation signal s 2 (t) and a third baseband signal s 4 The sampling rate of (t); the modulation mode of the multi-signal modulation module, namely the modulation mode of the baseband modulation unit; channel type.
S520, initially, setting a range of a first power coefficient, a range of a second power coefficient, a range of a third power coefficient and a range of a fourth power coefficient; at least one of a range of the first power coefficient, a range of the second power coefficient, a range of the third power coefficient, and a range of the fourth power coefficient is adjusted.
S530, receiving the simulation error rate.
It should be noted that, the simulation receiver processes the tactics: first, the I branch signal (namely, the first branch signal) is captured and tracked, and s is judged 01 (t)、s 02 (t) whether a signal is present. If s 01 (t)、s 02 (t)、s 04 And (t) simultaneously carrying out pseudo code and carrier synchronization according to the I-path component, and then integrating and judging according to the width of the data symbol based on the phase compensation Q-path component. If not contain s 04 (t) only the I branch component is present and the Q branch signal (i.e., the second branch signal) is discarded from demodulation. If only the data transmission component s is stored 04 And (t) when the signal power of the I branch is smaller, the data transmission signal of the Q branch is demodulated according to BPSK.
S540, judging whether the first branch signal is captured or not, and if the first branch signal is not captured, executing S520; if the first tributary signal is acquired, S550 is performed.
S550, judging whether the second branch signal is captured, and if the second branch signal is not captured, executing S520; if the second tributary signal is captured, S560 is performed.
S560, judging whether the simulated error rate falls into a set interval, and executing S520 if the simulated error rate does not fall into the set interval; if the simulated bit error rate falls within the set interval, S570 is executed.
In this embodiment, it may be determined whether the demodulation emulation error rate falls within a set interval.
S570, taking the range of the latest adjusted first power coefficient as the target range of the first power coefficient, the range of the latest adjusted second power coefficient as the target range of the second power coefficient, the range of the latest adjusted third power coefficient as the target range of the third power coefficient, and the range of the latest adjusted fourth power coefficient as the target range of the fourth power coefficient.
In this embodiment, each step involves simulation configuration parameters, and the execution body is a simulation system.
S340, quadrature modulation is carried out on the signals subjected to the multiple power adjustment through an unbalanced modulation module, and a target modulation signal is obtained so as to be transmitted to a satellite.
In this embodiment, the unbalanced modulation module performs quadrature modulation on the signal after the first power adjustment and the signal after the second power adjustment to synthesize a target modulation signal, and transmits the target modulation signal to the satellite in the same uplink physical channel.
Optionally, quadrature modulation is performed on the multiple power-adjusted signals by an unbalanced modulation module to obtain a target modulation signal, which includes: quadrature modulation is carried out on the signal subjected to the first power adjustment through an unbalanced modulation module, so that a first branch signal is obtained; quadrature modulation is carried out on the signal subjected to the second power adjustment through an unbalanced modulation module, and a second branch signal is obtained; and taking the signal synthesized by the first branch signal and the second branch signal as a target modulation signal.
For example, as shown in fig. 4, for an unbalanced modulation module, quadrature modulation is performed on the signal after the first power adjustment by using the unbalanced modulation module, so as to obtain a first branch signal (i.e. an I branch or a measurement and control channel); quadrature modulation is carried out on the signal subjected to the second power adjustment through an unbalanced modulation module, and a second branch signal (namely a Q branch or a data transmission channel) is obtained; taking the signal synthesized by the first branch signal and the second branch signal as a UQPSK modulated signal s uqpsk (t) (i.e., the target modulation signal).
The ground station adjusts the power ratio of the two signals according to the remote control and ranging signal rates, then adjusts the power ratio of the first branch signal and the second branch signal, and finally synthesizes the UQPSK signal and transmits the UQPSK signal on the same uplink physical channel. The satellite measurement and control transponder independently demodulates two branches of the UQPSK modulation signal after receiving the uplink signal of the ground station. Despreading the I branch, demodulating by binary phase shift keying (Binary Phase Shift Keying, BPSK) to obtain remote control and ranging data; and performing BPSK demodulation and decoding on the Q branch, and recovering data transmission data.
The invention provides a new uplink modulation strategy, which increases the demodulation isolation between two signals by using the spread spectrum gain between a spread spectrum signal and a non-spread spectrum signal, and further increases the demodulation isolation between the signals by using different powers of signals with different rates, thereby realizing the simultaneous shared channel transmission of three signals. The method solves the problem that uplink remote control, uplink ranging and uplink transmission signals cannot share a physical channel and simultaneously transmit at the same frequency in the prior art.
According to the technical scheme disclosed by the embodiment, various original signals are obtained; wherein the plurality of original signals comprise an uplink remote control signal, an uplink ranging signal and an uplink data transmission signal; the multi-signal modulation module is used for carrying out baseband spread spectrum modulation on the plurality of original signals to obtain a plurality of initial modulation signals; the power of the plurality of initial modulation signals is regulated through a power regulating module, and a plurality of signals with regulated power are obtained; and carrying out quadrature modulation on the signals subjected to the multiple power adjustments through an unbalanced modulation module to obtain a target modulation signal, so as to transmit the target modulation signal to a satellite. According to the method and the device, baseband spread spectrum modulation is carried out on various original signals through the multi-signal modulation module, power of various initial modulation signals is regulated through the power regulation module, and orthogonal modulation is carried out on signals with various regulated powers through the unbalanced modulation module, so that three signals of an uplink remote control signal, an uplink ranging signal and an uplink uploading signal can be transmitted on one uplink physical channel at the same time. The method overcomes the defect that the uplink remote control, the uplink ranging and the uplink signal are needed to be used in a station passing window in a time sharing way in the traditional spread spectrum measurement and control, so that the utilization rate and the frequency spectrum efficiency of the uplink physical channel of the ground station are increased, and the equipment cost, the task time cost and the task risk of the ground station are reduced.
The invention is applicable to the field of satellite measurement and control data transmission, is applicable to applications with similar requirements, such as measurement and control data transmission links of unmanned aerial vehicles, and has strong practical value and economic value.
The implementation of the uplink remote control, uplink ranging and uplink simultaneous shared channel transmission method provided by the embodiment of the invention needs to simulate according to specific parameters of an actual system so as to determine the power ratio coefficients of the three signals under the modulation strategy of the invention. By way of example, a specific implementation example of this method is given below:
(1) Determination of actual System parameters (simulation configuration parameters)
Signal s 01 (t)、s 02 (t)、s 04 The information rates of (t) are respectively: 4kbps, 1kbps, 4.092Mbps; spread spectrum signal C 01 (t)、C 02 Code rate of (t): 3.069Mcps; signal s 1 (t)、s 2 (t)、s 4 Sample rate of (t): 30.69Msps; the modulation mode of the baseband modulation unit is BPSK; the channel type is AWGN;
(2) The reception performance at each power ratio was simulated.
p 1 、p 2 、p 3 ，p 4 The ranges are shown in table 1.
TABLE 1 Power proportioning parameters
| Sequence number | IQstate | IQPR(dB) | I branch Eb/N0 (dB) | Q branch Eb/N0 (dB) |
| 1 | 0 | -10 | [-10:0,5:10] | [5.3:15.3,20.3:25.3] |
| 2 | 0 | 15 | [-10:0,5:10] | [0.3:10.3,15.3:20.3] |
| 3 | 1 | -10 | ------ | [5.3:15.3,20.3:25.3] |
| 4 | 1 | -15 | ------ | [0.3:10.3,15.3:20.3] |
| 5 | 2 | -10 | [-10:0,5:10] | ------ |
| 6 | 2 | -15 | [-10:0,5:10] | ------ |
(3) Simulation and result analysis
And carrying out receiving simulation on the power ratio to obtain the receiving error rate of each signal.
Fig. 6 is a block diagram of error rate of a measurement and control channel according to an embodiment of the present invention. As shown in FIG. 6, for the error rate of the measurement and control channel, simulation results show that the error rate curves corresponding to the other conditions have good consistency except for the condition that the I branch has no signal. The addition of the data transmission channel does not affect the demodulation performance of the I branch signal Eb/N0 under the condition of ensuring that the I branch signal Eb/N0 is in a reasonable range.
Compared with the bit error rate theoretical curve of BPSK modulation, the demodulation performance of the I branch signal is degraded by about 1dB if the data transmission signal exists. The main reason is that under the condition of low signal-to-noise ratio, the pseudo code synchronization error and the carrier synchronization error affect the demodulation performance. When iqstate=0, p_iqr= -10, eb/n0=5.3 dB, the pseudo code synchronization error may reach around 0.1 chip, which may bring about a correlation loss around 0.9dB, which may be moderately compensated by optimizing the tracking loop. I branch pseudocode and carrier synchronization as shown in fig. 7a, 7b, 7c, 7d, where fig. 7a is a code discriminator output diagram; FIG. 7b is a code tracking error plot; FIG. 7c is a carrier phase discriminator output graph; fig. 7d is a carrier tracking error diagram.
Under the condition of p_iqr= -10 and eb/n0=5.3 dB, the output of the measurement and control channel correlator corresponding to different IQstate is shown in fig. 8a and 8b, and fig. 8a is a graph of the output of the measurement and control channel correlator when iqstate=0; fig. 8b is a graph of the measurement and control channel correlator output at iqstate=1. It can be seen that the noise dominates the demodulation performance of the I branch signal, and whether the data transmission signal is added does not have obvious influence on the reception of the measurement and control channel signal.
Fig. 9 is a diagram of demodulation error rate of a data transmission channel signal according to an embodiment of the present invention. Fig. 10 is an output diagram of a data transmission channel correlator according to an embodiment of the present invention. As shown in fig. 9 and fig. 10, under the condition of the same Eb/N0 budget, the co-channel transmission of the data transmission signal and the measurement and control channel signal has no influence on the demodulation performance.
Conclusion: when the signal power ratio of the I branch and the Q branch is within the range of minus 15, -10, the same frequency transmission data signal will not affect the demodulation of the measurement and control channel signal, and the demodulation performance of the Q branch signal will not be degraded due to the interference of the I branch signal.
Fig. 11 is a schematic structural diagram of a multi-signal transmission device according to an embodiment of the disclosure, as shown in fig. 11, where the device includes: a signal acquisition module 1101, a multi-signal modulation module 1102, a power adjustment module 1103, and an unbalanced modulation module 1104;
a signal acquisition module 1101, configured to acquire a plurality of original signals; wherein the plurality of original signals comprise an uplink remote control signal, an uplink ranging signal and an uplink data transmission signal; the multi-signal modulation module 1102 is configured to perform baseband spread spectrum modulation on the multiple original signals to obtain multiple initial modulation signals; the power adjustment module 1103 is configured to adjust the power of the plurality of initial modulation signals, and obtain a plurality of signals after power adjustment; the unbalanced modulation module 1104 is configured to perform quadrature modulation on the multiple power-adjusted signals to obtain a target modulation signal, so as to transmit the target modulation signal to a satellite.
According to the technical scheme disclosed by the embodiment, a plurality of original signals are acquired through a signal acquisition module; wherein the plurality of original signals comprise an uplink remote control signal, an uplink ranging signal and an uplink data transmission signal; the multi-signal modulation module is used for carrying out baseband spread spectrum modulation on the plurality of original signals to obtain a plurality of initial modulation signals; the power of the plurality of initial modulation signals is regulated through a power regulating module, and a plurality of signals with regulated power are obtained; and carrying out quadrature modulation on the signals subjected to the multiple power adjustments through an unbalanced modulation module to obtain a target modulation signal, so as to transmit the target modulation signal to a satellite. According to the method and the device, baseband spread spectrum modulation is carried out on various original signals through the multi-signal modulation module, power of various initial modulation signals is regulated through the power regulation module, and orthogonal modulation is carried out on signals with various regulated powers through the unbalanced modulation module, so that three signals of an uplink remote control signal, an uplink ranging signal and an uplink uploading signal can be transmitted on one uplink physical channel at the same time. The method overcomes the defect that the uplink remote control, the uplink ranging and the uplink signal are needed to be used in a station passing window in a time sharing way in the traditional spread spectrum measurement and control, so that the utilization rate and the frequency spectrum efficiency of the uplink physical channel of the ground station are increased, and the equipment cost, the task time cost and the task risk of the ground station are reduced.
The multi-signal modulation module comprises a first baseband modulation unit, a second baseband modulation unit, a third baseband modulation unit, a fourth baseband modulation unit, a fifth baseband modulation unit, a first spread spectrum modulation unit and a second spread spectrum modulation unit; the plurality of initial modulation signals comprise a first spread spectrum modulation signal, a second spread spectrum modulation signal and a third baseband signal; optionally, the multi-signal modulation module is specifically configured to: acquiring a remote control data bit stream of the uplink remote control signal, a first spread spectrum code, a ranging data bit stream of the uplink ranging signal, a second spread spectrum code and a data transmission data bit stream of the uplink ranging signal; performing baseband modulation on the remote control data bit stream through a first baseband modulation unit to obtain a first baseband signal; the first spread spectrum code is subjected to baseband modulation through a second baseband modulation unit, and a first spread spectrum signal is obtained; performing baseband modulation on the ranging data bit stream through a third baseband modulation unit to obtain a second baseband signal; performing baseband modulation on the second spread spectrum code through a fourth baseband modulation unit to obtain a second spread spectrum signal; performing baseband modulation on the data bit stream through a fifth baseband modulation unit to obtain a third baseband signal; performing spread spectrum modulation on the baseband signal and the first spread spectrum signal through a first spread spectrum modulation unit to obtain a first spread spectrum modulation signal; and performing spread spectrum modulation on the two baseband signals and the second spread spectrum signal through a second spread spectrum modulation unit to obtain a second spread spectrum modulation signal.
The power regulation module comprises a first power regulation unit, a second power regulation unit, a third power regulation unit and a fourth power regulation unit; the plurality of power adjusted signals includes a first power adjusted signal and a second power adjusted signal. Optionally, the power adjustment module is specifically configured to: determining a power proportioning coefficient; the power proportioning coefficient comprises a first power coefficient, a second power coefficient, a third power coefficient and a fourth power coefficient; the first power adjustment unit is used for carrying out power adjustment on the first spread spectrum modulation signal by combining the first power coefficient to obtain a first power signal; performing power adjustment on the second spread spectrum modulation signal by combining the second power coefficient through a second power adjustment unit to obtain a second power signal; the power of the signal synthesized by the first power signal and the second power signal is regulated by combining a third power coefficient through a third power regulating unit, so that a signal after the first power regulation is obtained; and carrying out power adjustment on the third baseband signal by combining the fourth power coefficient through a fourth power adjustment unit to obtain a signal after the second power adjustment.
Optionally, the unbalanced modulation module is specifically configured to: quadrature modulation is carried out on the signal subjected to the first power adjustment through an unbalanced modulation module, so that a first branch signal is obtained; quadrature modulation is carried out on the signal subjected to the second power adjustment through an unbalanced modulation module, and a second branch signal is obtained; and taking the signal synthesized by the first branch signal and the second branch signal as a target modulation signal.
Optionally, the power adjustment module is further configured to: acquiring a target range of a first power coefficient, a target range of a second power coefficient, a target range of a third power coefficient and a target range of a fourth power coefficient; determining the first power coefficient according to the target range of the first power coefficient; determining the second power coefficient according to the target range of the second power coefficient; determining the third power coefficient according to the target range of the third power coefficient; and determining the fourth power coefficient according to the target range of the fourth power coefficient.
Optionally, the device further includes a simulation module, where the simulation module is specifically configured to: setting a range of the first power coefficient, a range of the second power coefficient, a range of the third power coefficient and a range of the fourth power coefficient; receiving a simulated error rate; if the first branch signal is not captured, adjusting at least one of the range of the first power coefficient, the range of the second power coefficient, the range of the third power coefficient and the range of the fourth power coefficient until the first branch signal is captured; if the first branch signal is captured and the second branch signal is not captured, adjusting at least one of the range of the first power coefficient, the range of the second power coefficient, the range of the third power coefficient and the range of the fourth power coefficient until the second branch signal is captured; if a second branch signal is captured and the simulated error rate does not fall into a set interval, adjusting at least one of the range of the first power coefficient, the range of the second power coefficient, the range of the third power coefficient and the range of the fourth power coefficient until the simulated error rate falls into the set interval; if the simulated error rate falls into a set interval, taking the range of the latest adjusted first power coefficient as a target range of the first power coefficient, taking the range of the latest adjusted second power coefficient as a target range of the second power coefficient, taking the range of the latest adjusted third power coefficient as a target range of the third power coefficient and taking the range of the latest adjusted fourth power coefficient as a target range of the fourth power coefficient.
Optionally, the simulation module is further configured to: obtaining simulation configuration parameters; wherein the simulation configuration parameters include information rates of the first baseband signal, the second baseband signal, and the unfiltered third baseband signal; a code rate of the first spread spectrum signal and the second spread spectrum signal; the sampling rate of the first spread spectrum modulated signal, the second spread spectrum modulated signal, and the third baseband signal; modulation modes of the multi-signal modulation module; channel type.
The multi-signal transmission device provided by the embodiment of the disclosure can execute the multi-signal transmission method provided by any embodiment of the disclosure, and has the corresponding functional modules and beneficial effects of the execution method.
It should be noted that each unit and module included in the above apparatus are only divided according to the functional logic, but not limited to the above division, so long as the corresponding functions can be implemented; in addition, the specific names of the functional units are also only for convenience of distinguishing from each other, and are not used to limit the protection scope of the embodiments of the present disclosure.
Fig. 12 is a schematic structural diagram of an electronic device according to an embodiment of the disclosure. Referring now to fig. 12, a schematic diagram of a configuration of an electronic device (e.g., a terminal device or server in fig. 12) 1200 suitable for use in implementing embodiments of the present disclosure is shown. The terminal devices in the embodiments of the present disclosure may include, but are not limited to, mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and the like, and stationary terminals such as digital TVs, desktop computers, and the like. The electronic device shown in fig. 12 is merely an example and should not be construed to limit the functionality and scope of use of the disclosed embodiments. As shown in fig. 12, the electronic apparatus 1200 may include a processing device (e.g., a central processor, a graphics processor, etc.) 1201, which may perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM) 1202 or a program loaded from a storage device 1208 into a Random Access Memory (RAM) 1203. In the RAM 1203, various programs and data required for the operation of the electronic apparatus 1200 are also stored. The processing device 1201, the ROM 1202, and the RAM 1203 are connected to each other through a bus 1204. An edit/output (I/O) interface 1205 is also connected to the bus 1204.
In general, the following devices may be connected to the I/O interface 1205: input devices 1206 including, for example, a touch screen, touchpad, keyboard, mouse, camera, microphone, accelerometer, gyroscope, and the like; an output device 1207 including, for example, a Liquid Crystal Display (LCD), a speaker, a vibrator, and the like; storage 1208 including, for example, magnetic tape, hard disk, etc.; and a communication device 1209. The communication means 1209 may allow the electronic device 1200 to communicate wirelessly or by wire with other devices to exchange data. While fig. 12 shows an electronic device 1200 having various means, it is to be understood that not all illustrated means are required to be implemented or provided. More or fewer devices may be implemented or provided instead.
In particular, according to embodiments of the present disclosure, the processes described above with reference to flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a non-transitory computer readable medium, the computer program comprising program code for performing the method shown in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network via the communication device 1209, or installed from the storage device 1208, or installed from the ROM 1202. The above-described functions defined in the methods of the embodiments of the present disclosure are performed when the computer program is executed by the processing device 1201.
The names of messages or information interacted between the various devices in the embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.
The electronic device provided by the embodiment of the present disclosure and the multi-signal transmission method provided by the foregoing embodiment belong to the same inventive concept, and technical details not described in detail in the present embodiment may be referred to the foregoing embodiment, and the present embodiment has the same beneficial effects as the foregoing embodiment.
The disclosed embodiments provide a computer storage medium having a computer program stored thereon, which when executed by a processor, implements the multi-signal transmission method provided by the above embodiments.
It should be noted that the computer readable medium described in the present disclosure may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this disclosure, a computer-readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present disclosure, however, the computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with the computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, fiber optic cables, RF (radio frequency), and the like, or any suitable combination of the foregoing.
In some implementations, the clients, servers may communicate using any currently known or future developed network protocol, such as HTTP (HyperText Transfer Protocol ), and may be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), the internet (e.g., the internet), and peer-to-peer networks (e.g., ad hoc peer-to-peer networks), as well as any currently known or future developed networks.
The computer readable medium may be contained in the electronic device; or may exist alone without being incorporated into the electronic device. The computer readable medium carries one or more programs which, when executed by the electronic device, cause the electronic device to: acquiring a plurality of original signals; wherein the plurality of original signals comprise an uplink remote control signal, an uplink ranging signal and an uplink data transmission signal; the multi-signal modulation module is used for carrying out baseband spread spectrum modulation on the plurality of original signals to obtain a plurality of initial modulation signals; the power of the plurality of initial modulation signals is regulated through a power regulating module, and a plurality of signals with regulated power are obtained; and carrying out quadrature modulation on the signals subjected to the multiple power adjustments through an unbalanced modulation module to obtain a target modulation signal, so as to transmit the target modulation signal to a satellite.
The foregoing description is only of the preferred embodiments of the present disclosure and description of the principles of the technology being employed. It will be appreciated by persons skilled in the art that the scope of the disclosure referred to in this disclosure is not limited to the specific combinations of features described above, but also covers other embodiments which may be formed by any combination of features described above or equivalents thereof without departing from the spirit of the disclosure. Such as those described above, are mutually substituted with the technical features having similar functions disclosed in the present disclosure (but not limited thereto).
Moreover, although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are example forms of implementing the claims.
Claims (6)
1. A method of multiple signal transmission comprising:
acquiring a plurality of original signals; wherein the plurality of original signals comprise an uplink remote control signal, an uplink ranging signal and an uplink data transmission signal;
the multi-signal modulation module is used for carrying out baseband spread spectrum modulation on the plurality of original signals to obtain a plurality of initial modulation signals;
the power of the plurality of initial modulation signals is regulated through a power regulating module, and a plurality of signals with regulated power are obtained;
quadrature modulation is carried out on the signals subjected to the multiple power adjustment through an unbalanced modulation module, and a target modulation signal is obtained so as to transmit the target modulation signal to a satellite;
the multi-signal modulation module comprises a first baseband modulation unit, a second baseband modulation unit, a third baseband modulation unit, a fourth baseband modulation unit, a fifth baseband modulation unit, a first spread spectrum modulation unit and a second spread spectrum modulation unit; the plurality of initial modulation signals comprise a first spread spectrum modulation signal, a second spread spectrum modulation signal and a third baseband signal;
The power regulation module comprises a first power regulation unit, a second power regulation unit, a third power regulation unit and a fourth power regulation unit; the plurality of power adjusted signals includes a first power adjusted signal and a second power adjusted signal;
the power adjusting module adjusts the power of the plurality of initial modulation signals to obtain a plurality of signals after power adjustment, and the method comprises the following steps: determining a power proportioning coefficient; the power proportioning coefficient comprises a first power coefficient, a second power coefficient, a third power coefficient and a fourth power coefficient; the first power adjustment unit is used for carrying out power adjustment on the first spread spectrum modulation signal by combining the first power coefficient to obtain a first power signal; performing power adjustment on the second spread spectrum modulation signal by combining the second power coefficient through a second power adjustment unit to obtain a second power signal; the power of the signal synthesized by the first power signal and the second power signal is regulated by combining a third power coefficient through a third power regulating unit, so that a signal after the first power regulation is obtained; the third baseband signal is subjected to power adjustment by combining a fourth power adjustment unit with the fourth power coefficient, and a second power adjusted signal is obtained;
The quadrature modulation is performed on the signals subjected to the multiple power adjustment through an unbalanced modulation module to obtain a target modulation signal, which comprises the following steps:
quadrature modulation is carried out on the signal subjected to the first power adjustment through an unbalanced modulation module, so that a first branch signal is obtained;
quadrature modulation is carried out on the signal subjected to the second power adjustment through an unbalanced modulation module, and a second branch signal is obtained;
taking the signal synthesized by the first branch signal and the second branch signal as a target modulation signal;
wherein determining the power proportioning factor comprises: acquiring a target range of a first power coefficient, a target range of a second power coefficient, a target range of a third power coefficient and a target range of a fourth power coefficient; determining the first power coefficient according to the target range of the first power coefficient; determining the second power coefficient according to the target range of the second power coefficient; determining the third power coefficient according to the target range of the third power coefficient; determining the fourth power coefficient according to the target range of the fourth power coefficient;
the method for obtaining the target range of the first power coefficient, the target range of the second power coefficient, the target range of the third power coefficient and the target range of the fourth power coefficient comprises the following steps: setting a range of the first power coefficient, a range of the second power coefficient, a range of the third power coefficient and a range of the fourth power coefficient; receiving a simulated error rate; if the first branch signal is not captured, adjusting at least one of the range of the first power coefficient, the range of the second power coefficient, the range of the third power coefficient and the range of the fourth power coefficient until the first branch signal is captured; if the first branch signal is captured and the second branch signal is not captured, adjusting at least one of the range of the first power coefficient, the range of the second power coefficient, the range of the third power coefficient and the range of the fourth power coefficient until the second branch signal is captured; if a second branch signal is captured and the simulated error rate does not fall into a set interval, adjusting at least one of the range of the first power coefficient, the range of the second power coefficient, the range of the third power coefficient and the range of the fourth power coefficient until the simulated error rate falls into the set interval; if the simulated error rate falls into a set interval, taking the range of the latest adjusted first power coefficient as a target range of the first power coefficient, taking the range of the latest adjusted second power coefficient as a target range of the second power coefficient, taking the range of the latest adjusted third power coefficient as a target range of the third power coefficient and taking the range of the latest adjusted fourth power coefficient as a target range of the fourth power coefficient.
2. The method of claim 1, wherein the plurality of original signals are baseband spread spectrum modulated by a multi-signal modulation module to obtain a plurality of initially modulated signals, comprising:
acquiring a remote control data bit stream of the uplink remote control signal, a first spread spectrum code, a ranging data bit stream of the uplink ranging signal, a second spread spectrum code and a data transmission data bit stream of the uplink ranging signal;
performing baseband modulation on the remote control data bit stream through a first baseband modulation unit to obtain a first baseband signal;
the first spread spectrum code is subjected to baseband modulation through a second baseband modulation unit, and a first spread spectrum signal is obtained;
performing baseband modulation on the ranging data bit stream through a third baseband modulation unit to obtain a second baseband signal;
performing baseband modulation on the second spread spectrum code through a fourth baseband modulation unit to obtain a second spread spectrum signal;
performing baseband modulation on the data bit stream through a fifth baseband modulation unit to obtain a third baseband signal;
performing spread spectrum modulation on the baseband signal and the first spread spectrum signal through a first spread spectrum modulation unit to obtain a first spread spectrum modulation signal;
And performing spread spectrum modulation on the two baseband signals and the second spread spectrum signal through a second spread spectrum modulation unit to obtain a second spread spectrum modulation signal.
3. The method of claim 1, further comprising, prior to setting the range of the first power coefficient, the range of the second power coefficient, the range of the third power coefficient, and the range of the fourth power coefficient:
obtaining simulation configuration parameters; wherein the simulation configuration parameters include information rates of the first baseband signal, the second baseband signal, and the unfiltered third baseband signal; a code rate of the first spread spectrum signal and the second spread spectrum signal; the sampling rate of the first spread spectrum modulated signal, the second spread spectrum modulated signal, and the third baseband signal; modulation modes of the multi-signal modulation module; channel type.
4. A multiple signal transmission apparatus, comprising:
the signal acquisition module is used for acquiring various original signals; wherein the plurality of original signals comprise an uplink remote control signal, an uplink ranging signal and an uplink data transmission signal;
the multi-signal modulation module is used for carrying out baseband spread spectrum modulation on the plurality of original signals to obtain a plurality of initial modulation signals;
The power adjusting module is used for adjusting the power of the plurality of initial modulation signals to obtain a plurality of signals after power adjustment;
the unbalanced modulation module is used for carrying out quadrature modulation on the signals subjected to the multiple power adjustments to obtain a target modulation signal so as to transmit the target modulation signal to a satellite;
the multi-signal modulation module comprises a first baseband modulation unit, a second baseband modulation unit, a third baseband modulation unit, a fourth baseband modulation unit, a fifth baseband modulation unit, a first spread spectrum modulation unit and a second spread spectrum modulation unit; the plurality of initial modulation signals comprise a first spread spectrum modulation signal, a second spread spectrum modulation signal and a third baseband signal;
the power regulation module comprises a first power regulation unit, a second power regulation unit, a third power regulation unit and a fourth power regulation unit; the plurality of power adjusted signals includes a first power adjusted signal and a second power adjusted signal;
the power adjusting module is specifically used for: determining a power proportioning coefficient; the power proportioning coefficient comprises a first power coefficient, a second power coefficient, a third power coefficient and a fourth power coefficient; the first power adjustment unit is used for carrying out power adjustment on the first spread spectrum modulation signal by combining the first power coefficient to obtain a first power signal; performing power adjustment on the second spread spectrum modulation signal by combining the second power coefficient through a second power adjustment unit to obtain a second power signal; the power of the signal synthesized by the first power signal and the second power signal is regulated by combining a third power coefficient through a third power regulating unit, so that a signal after the first power regulation is obtained; the third baseband signal is subjected to power adjustment by combining a fourth power adjustment unit with the fourth power coefficient, and a second power adjusted signal is obtained;
The unbalanced modulation module is specifically configured to: quadrature modulation is carried out on the signal subjected to the first power adjustment through an unbalanced modulation module, so that a first branch signal is obtained; quadrature modulation is carried out on the signal subjected to the second power adjustment through an unbalanced modulation module, and a second branch signal is obtained; taking the signal synthesized by the first branch signal and the second branch signal as a target modulation signal;
wherein, the power adjustment module is further for: acquiring a target range of a first power coefficient, a target range of a second power coefficient, a target range of a third power coefficient and a target range of a fourth power coefficient; determining the first power coefficient according to the target range of the first power coefficient; determining the second power coefficient according to the target range of the second power coefficient; determining the third power coefficient according to the target range of the third power coefficient; determining the fourth power coefficient according to the target range of the fourth power coefficient;
wherein, emulation module is used for: setting a range of the first power coefficient, a range of the second power coefficient, a range of the third power coefficient and a range of the fourth power coefficient; receiving a simulated error rate; if the first branch signal is not captured, adjusting at least one of the range of the first power coefficient, the range of the second power coefficient, the range of the third power coefficient and the range of the fourth power coefficient until the first branch signal is captured; if the first branch signal is captured and the second branch signal is not captured, adjusting at least one of the range of the first power coefficient, the range of the second power coefficient, the range of the third power coefficient and the range of the fourth power coefficient until the second branch signal is captured; if a second branch signal is captured and the simulated error rate does not fall into a set interval, adjusting at least one of the range of the first power coefficient, the range of the second power coefficient, the range of the third power coefficient and the range of the fourth power coefficient until the simulated error rate falls into the set interval; if the simulated error rate falls into a set interval, taking the range of the latest adjusted first power coefficient as a target range of the first power coefficient, taking the range of the latest adjusted second power coefficient as a target range of the second power coefficient, taking the range of the latest adjusted third power coefficient as a target range of the third power coefficient and taking the range of the latest adjusted fourth power coefficient as a target range of the fourth power coefficient.
5. An electronic device, the electronic device comprising:
one or more processors;
storage means for storing one or more programs,
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the multi-signaling method of any of claims 1-3.
6. A storage medium containing computer executable instructions for performing the multi-signal transmission method of any of claims 1-3 when executed by a computer processor.
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| CN103812552A (en) * | 2014-01-24 | 2014-05-21 | 中国人民解放军国防科学技术大学 | Distance measurement-communication integrated inter-satellite link wireless signal structure |
| CN109412613A (en) * | 2018-10-16 | 2019-03-01 | 湖南迈克森伟电子科技有限公司 | High-speed digital transmission sending device |
| CN111884971A (en) * | 2020-06-29 | 2020-11-03 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Measurement and control signal and OFDM signal integrated waveform coexisting transmission system |
| CN113452400A (en) * | 2021-06-28 | 2021-09-28 | 中国电子科技集团公司第五十四研究所 | Measurement and control communication integrated signal generating and receiving method under high dynamic environment |
| CN114884559A (en) * | 2022-04-15 | 2022-08-09 | 中国电子科技集团公司第十研究所 | Measurement and control communication cooperative transmission method and system |
| CN116094890A (en) * | 2022-11-21 | 2023-05-09 | 重庆大学 | Communication signal transmission method based on integrated signal |
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