CN115955258B - Navigation signal receiving and transmitting isolation self-adaptive cancellation method based on reference waveform - Google Patents
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Abstract
The application relates to a navigation signal receiving and transmitting isolation self-adaptive cancellation method based on a reference waveform. The method comprises the following steps: the receiving antenna of the low-orbit satellite simultaneously receives the low-orbit navigation signal radiated outwards by the transmitting antenna and the medium-high-orbit navigation signal transmitted by the medium-high-orbit satellite to obtain a combined signal after combining; taking a low-rail navigation signal transmitted at an antenna inlet of a transmitter as a simulation reference interference signal, and performing simulation cancellation according to the simulation reference interference signal and the combined signal to obtain a simulation cancellation result; and carrying out frequency conversion and sampling on the analog cancellation result to obtain an intermediate frequency digital signal, and carrying out frequency conversion and sampling on the analog reference interference signal to obtain a digital reference interference signal. The method can solve the problem of non-ideal cancellation effect under the waveform of the generated interference signal, and improves the suppression capability of the interference signal.
Description
Technical Field
The application relates to the technical field of radio communication, in particular to a navigation signal receiving and transmitting isolation self-adaptive cancellation method based on reference waveforms.
Background
The navigation signal is broadcast on the low orbit satellite, and the navigation signal and the medium and high orbit satellite system provide navigation service for the user, so that the space observation geometric configuration of the user can be improved. Meanwhile, the low-orbit satellite needs to receive the middle-high orbit navigation signal to realize the autonomous orbit determination function, so that the low-orbit satellite needs to receive the middle-high orbit navigation signal on one hand, needs to broadcast the navigation signal to the ground, and generates the same-frequency interference to the receiving of the middle-high orbit navigation signal when broadcasting the navigation signal to the ground, so that the low-orbit satellite needs to solve the receiving and transmitting isolation problem of the same-frequency signal when receiving the middle-high orbit navigation signal.
For the transmit-receive isolation problem, the solutions commonly used at present include: the method is dependent on satellite platform and antenna design, can be used for large satellite platform, and has limited star isolation for small low-orbit satellite platform. In addition, a cancellation method can be adopted, the interference signal is cancelled from the received signal according to the waveform of the interference signal, and the traditional cancellation method is based on the locally generated interference signal waveform for cancellation processing, but because the actual interference signal is transmitted through a channel, including links such as a radio frequency channel, a power amplifier, an antenna, space transmission and the like, a certain amplitude-phase distortion exists in the actually received interference signal, and the locally generated interference signal waveform is difficult to accurately describe the channel characteristics, so that the cancellation effect is not ideal.
Disclosure of Invention
Accordingly, it is necessary to provide a navigation signal receiving and transmitting isolation adaptive cancellation method based on reference waveforms.
A navigation signal transmit-receive isolation self-adaptive cancellation method based on a reference waveform, the method comprising:
the receiving antenna of the low-orbit satellite simultaneously receives the low-orbit navigation signal radiated outwards by the transmitting antenna and the medium-high-orbit navigation signal transmitted by the medium-high-orbit satellite to obtain a combined signal after combining;
taking a low-rail navigation signal transmitted at an antenna inlet of a transmitter as a simulation reference interference signal, and performing simulation cancellation according to the simulation reference interference signal and the combined signal to obtain a simulation cancellation result;
performing frequency conversion and sampling on the analog cancellation result to obtain an intermediate frequency digital signal, and performing frequency conversion and sampling on the analog reference interference signal to obtain a digital reference interference signal;
and carrying out self-adaptive digital cancellation according to the digital reference interference signal and the intermediate frequency digital signal to obtain a digital cancellation result so as to realize receiving and transmitting isolation of the simultaneous same-frequency signals.
In one embodiment, the method further comprises: inputting the digital reference interference signal into a time domain adaptive filter, and performing adaptive filtering by using a corresponding filter coefficient to obtain a filtered digital reference interference signal; and canceling the filtered digital reference interference signals from the intermediate frequency digital signals to obtain digital cancellation results.
In one embodiment, the method further comprises: and calculating according to the digital cancellation result to obtain a filter coefficient as follows:
wherein ,
for the iteration factor->
For conjugate operation, ++>
For the filter coefficients +.>
For digital cancellation results, < >>
Is a filtered digital reference interference signal.
In one embodiment, the method further comprises: performing power division phase shift on the analog reference interference signal to obtain two paths of orthogonal components of the analog reference interference signal; vector modulation is carried out on the two paths of orthogonal components according to the corresponding reference carrier estimation result, and a signal after vector modulation is obtained; and carrying out cancellation processing on the vector modulated signal and the combined signal to obtain an analog cancellation result.
In one embodiment, the method further comprises: performing power estimation on the simulation cancellation result to obtain a power estimation result of the simulation cancellation result; according to the power estimation result, the current reference carrier estimation result is adjusted as follows:
wherein ,
is an in-phase component>
Is a quadrature component->
For the optimal amplitude of the reference carrier, +.>
Is the best phase of the reference carrier.
In one embodiment, the method further comprises: performing analog power estimation on the analog cancellation result to obtain an analog power estimation result, and performing digital power estimation on the intermediate frequency digital signal to obtain a digital power estimation result;
and obtaining a power estimation result of the simulation cancellation result according to the simulation power estimation result and the digital power estimation result.
In one embodiment, the method further comprises: traversing the phase in a preset phase searching range, and obtaining an optimal phase according to a phase value when a power estimation result is minimum; according to the power estimation result, adjusting the amplitude to minimize the power estimation result to obtain the optimal amplitude; and obtaining a current reference carrier estimation result according to the optimal phase and the optimal amplitude.
In one embodiment, the method further comprises: the preset phase searching range is 0-2 pi.
A computer device comprising a memory storing a computer program and a processor which when executing the computer program performs the steps of:
the receiving antenna of the low-orbit satellite simultaneously receives the low-orbit navigation signal radiated outwards by the transmitting antenna and the medium-high-orbit navigation signal transmitted by the medium-high-orbit satellite to obtain a combined signal after combining;
taking a low-rail navigation signal transmitted at an antenna inlet of a transmitter as a simulation reference interference signal, and performing simulation cancellation according to the simulation reference interference signal and the combined signal to obtain a simulation cancellation result;
performing frequency conversion and sampling on the analog cancellation result to obtain an intermediate frequency digital signal, and performing frequency conversion and sampling on the analog reference interference signal to obtain a digital reference interference signal;
and carrying out self-adaptive digital cancellation according to the digital reference interference signal and the intermediate frequency digital signal to obtain a digital cancellation result so as to realize receiving and transmitting isolation of the simultaneous same-frequency signals.
A computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:
the receiving antenna of the low-orbit satellite simultaneously receives the low-orbit navigation signal radiated outwards by the transmitting antenna and the medium-high-orbit navigation signal transmitted by the medium-high-orbit satellite to obtain a combined signal after combining;
taking a low-rail navigation signal transmitted at an antenna inlet of a transmitter as a simulation reference interference signal, and performing simulation cancellation according to the simulation reference interference signal and the combined signal to obtain a simulation cancellation result;
performing frequency conversion and sampling on the analog cancellation result to obtain an intermediate frequency digital signal, and performing frequency conversion and sampling on the analog reference interference signal to obtain a digital reference interference signal;
and carrying out self-adaptive digital cancellation according to the digital reference interference signal and the intermediate frequency digital signal to obtain a digital cancellation result so as to realize receiving and transmitting isolation of the simultaneous same-frequency signals.
According to the navigation signal receiving and transmitting isolation self-adaptive cancellation method based on the reference waveform, the low-rail navigation signals coupled and output from the transmitting channel are collected at the low-rail receiving end, the low-rail navigation signals at the entrance of the transmitting antenna are used as the reference interference signals, the combined signals comprising the low-rail navigation signals and the middle-high-rail navigation signals which are in the same frequency are received and transmitted and isolated, the strong interference coupled in the receiving antenna is eliminated, and the cancellation effect of the interference signals is improved. The method comprises the steps of receiving and transmitting an isolated reference interference signal, carrying out interference cancellation in a signal analog channel, and inhibiting a strong interference signal, so that a subsequent digital sampling device works normally, and carrying out self-adaptive cancellation on the reference interference signal sampled by the analog channel and a combined signal acquired by a receiving antenna in a digital domain. The embodiment of the invention can solve the problem of non-ideal cancellation effect under the generated interference signal waveform, and improves the inhibition capability of the interference signal.
Drawings
FIG. 1 is a flow chart of a navigation signal transmit-receive isolation adaptive cancellation method based on a reference waveform in one embodiment;
FIG. 2 is a block diagram of a navigation signal transmit-receive isolation adaptive cancellation device based on a reference waveform in one embodiment;
FIG. 3 is a block diagram of an embodiment of a simulated cancellation channel;
FIG. 4 is a block diagram of an adaptive digital cancellation processing module in one embodiment;
FIG. 5 is a schematic diagram of simulation results of power estimation results as a function of phase angle and signal amplitude in one embodiment;
FIG. 6 is a block diagram of a navigation signal transmit-receive isolation adaptive cancellation device based on a reference waveform in an embodiment;
fig. 7 is an internal structural diagram of a computer device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
In one embodiment, as shown in fig. 1, a navigation signal receiving and transmitting isolation adaptive cancellation method based on a reference waveform is provided, which includes the following steps:
As shown in fig. 2, which is a block diagram of a navigation signal receiving and transmitting isolation self-adaptive cancellation device based on reference waveforms, a transmitter 201 outputs a low-rail navigation signal broadcasted to the ground through modulation frequency conversion and amplification of a power amplifier
Transmitting antenna 202 radiates the low rail navigation signal outwards +.>
Low-rail navigation signal radiated by transmitting antenna +.>
While spatially coupled to the receiving antenna, the receiving antenna 203 receives the mid-high orbit navigation signal pair receiving signal from the mid-high orbit satellite>
After the receiving antenna is combined, a combined signal is obtained>
，
，
For->
Causing strong dryingAnd (5) disturbing.
And 104, taking the low-rail navigation signal transmitted at the inlet of the transmitter antenna as a simulation reference interference signal, and performing simulation cancellation according to the simulation reference interference signal and the combined signal to obtain a simulation cancellation result.
Transmitting signals from transmitter antenna inlets
It is fed into the analog cancellation channel 204 as an analog reference interference signal for analog cancellation, and the analog cancellation channel 204 receives the combined signal +.>
And performing simulation cancellation processing to obtain a simulation cancellation result.
And 106, carrying out frequency conversion and sampling on the analog cancellation result to obtain an intermediate frequency digital signal, and carrying out frequency conversion and sampling on the analog reference interference signal to obtain a digital reference interference signal.
The analog cancellation result obtained after analog cancellation is input into a down-conversion module 306 for down-conversion sampling to obtain an intermediate frequency digital signal
Transmitting a signal from the transmitter antenna entrance>
It is fed into the reference interference channel 205 for down-conversion and sampling to obtain a sampled digital reference interference signal +.>
。
And step 108, performing self-adaptive digital cancellation according to the digital reference interference signal and the intermediate frequency digital signal to obtain a digital cancellation result so as to realize receiving and transmitting isolation of the simultaneous same-frequency signals.
The adaptive digital cancellation processing module 206 performs a digital intermediate frequency cancellation processing based on the input digital intermediate frequency signal
Digital reference interference signalNumber->
Performing digital domain self-adaptive cancellation processing to obtain digital cancellation result after common-frequency receiving and transmitting isolation cancellation>
。
In the navigation signal receiving and transmitting isolation self-adaptive cancellation method based on the reference waveform, the low-rail navigation signals coupled and output from the transmitting channel are collected at the low-rail receiving end, the low-rail navigation signals at the entrance of the transmitting antenna are used as the reference interference signals, the combined signals comprising the low-rail navigation signals and the middle-high-rail navigation signals which are in the same frequency are received and transmitted and isolated, the strong interference coupled in the receiving antenna is eliminated, and the cancellation effect of the interference signals is improved. The method comprises the steps of receiving and transmitting an isolated reference interference signal, carrying out interference cancellation in a signal analog channel, and inhibiting a strong interference signal, so that a subsequent digital sampling device works normally, and carrying out self-adaptive cancellation on the reference interference signal sampled by the analog channel and a combined signal acquired by a receiving antenna in a digital domain. The embodiment of the invention can solve the problem of non-ideal cancellation effect under the generated interference signal waveform, and improves the inhibition capability of the interference signal.
In one embodiment, as shown in fig. 3, there is provided a block diagram of a simulation cancellation channel, and the steps of performing simulation cancellation according to a simulation reference interference signal and a combined signal to obtain a simulation cancellation result include: performing power division phase shift on the analog reference interference signal to obtain two paths of orthogonal components of the analog reference interference signal; vector modulation is carried out on the two paths of orthogonal components according to the corresponding reference carrier estimation result, and a signal after vector modulation is obtained; and carrying out cancellation processing on the vector modulated signal and the combined signal to obtain an analog cancellation result. In the embodiment, the strong interference coupled in the receiving antenna can be effectively eliminated by utilizing the reference interference signal waveform processed by the radio frequency channel, the power amplifier and the like, the cancellation effect of the interference signal is improved, and in addition, the simulation cancellation channel is simpler in design, and the simulation cancellation can be rapidly carried out.
Specifically, as shown in FIG. 3, the reference interference signal is simulated
Input power division phase shifter 301, two-way quadrature component signal +.>
and
Quadrature component signal +.>
and
The input vector modulation module 302 performs vector modulation, and the modulated signal is +.>
，
, wherein
and
Is the input to the vector modulation module 302 and is processed by the reference carrier estimation module 305. Vector modulated +.>
And the input combined signal +.>
The analog cancellation is input to the analog cancellation unit 303 to complete the cancellation processing, and the result of the analog cancellation is +.>
，
The result of the analog cancellation is sent to the power estimation module 304, and the reference carrier is estimated according to the output power estimation result.
In one embodiment, as shown in fig. 6, there is provided a step of obtaining a reference carrier estimation result from a structural block diagram of a navigation signal receiving and transmitting isolation adaptive cancellation device based on a reference waveform, including: performing power estimation on the simulation cancellation result to obtain a power estimation result of the simulation cancellation result; according to the power estimation result, the current reference carrier estimation result is adjusted as follows:
wherein ,
is an in-phase component>
Is a quadrature component->
For the optimal amplitude of the reference carrier, +.>
Is the optimal phase of the reference carrier; the step of carrying out power estimation on the simulation cancellation result to obtain the power estimation result of the simulation cancellation result comprises the following steps: performing analog power estimation on the analog cancellation result to obtain an analog power estimation result, and performing digital power estimation on the intermediate frequency digital signal to obtain a digital power estimation result; obtaining a power estimation result of the simulation cancellation result according to the simulation power estimation result and the digital power estimation result; the step of adjusting the current reference carrier estimation result according to the power estimation result comprises the following steps: traversing the phase in a preset phase searching range, and obtaining an optimal phase according to a phase value when a power estimation result is minimum; according to the power estimation result, adjusting the amplitude to minimize the power estimation result to obtain the optimal amplitude; based on the optimal phase and the optimal amplitude,and obtaining a current reference carrier estimation result.
In this embodiment, the blind search result of the reference carrier is more accurate by performing analog rough estimation and digital fine estimation on the analog cancellation result. Specifically, as shown in fig. 6, the analog cancellation result is sent to an analog power estimator for coarse estimation to obtain an analog power estimation result, the analog cancellation result is subjected to frequency conversion and sampling to obtain an intermediate frequency digital signal, the intermediate frequency digital signal is subjected to digital power estimation to obtain a digital power estimation result after fine estimation, and the power estimation result is obtained according to the analog power estimation result and the digital power estimation resultP. Based on the power estimation result, performing blind search of the optimal simulation reference carrier, wherein the search comprises two steps:
(1) Traversing phase within 0-2 pi
Find to makePThe smallest phase value, noted +.>
；
(2) Based on the power estimateP，Adjusting amplitudeASo thatPThe minimum amplitude is
。
In a specific embodiment, as shown in fig. 5, a schematic diagram of a simulation result of a power estimation result changing with a phase angle and a signal amplitude is provided, and a preset phase search range is 0-2 pi. In this embodiment, as can be seen from fig. 5, by traversing 0-2 pi and different signal amplitudes, the smallest power estimation result can be found, and at this time, the corresponding angle and amplitude value is the blind search result, so as to obtain the optimal reference waveform angle and amplitude.
In one embodiment, as shown in fig. 4, there is provided a block diagram of an adaptive digital cancellation processing module, and the step of performing adaptive digital cancellation according to the digital reference interference signal and the intermediate frequency digital signal to obtain a digital cancellation result includes: inputting the digital reference interference signal into a time domain adaptive filter, and performing adaptive filtering by using a corresponding filter coefficient to obtain a filtered digital reference interference signal; and canceling the filtered digital reference interference signals from the intermediate frequency digital signals to obtain digital cancellation results. In this embodiment, the digital reference waveform and the intermediate frequency digital signal output by the analog cancellation channel are used to perform digital cancellation, so that the interference signal in the intermediate frequency digital signal can be further cancelled, and the influence of the non-ideal factors of the channels such as radio frequency and power amplifier on the reference waveform is cancelled by using analog cancellation and digital cancellation, so as to improve the cancellation effect of the receiving and transmitting isolation.
In particular, an analog reference interference signal
The digital signal after being sampled is obtained by down-converting and sampling by the down-converting sampling module 401>
Will->
As digital reference interference signal of digital cancellation, the digital reference interference signal is sent to a filter 402, and the filter 402 is a time domain adaptive filter to obtain a filtered signal +.>
，
, wherein ,
Is the coefficient of the adaptive filter, +.>
Is a convolution operation. Will->
and
Into digital canceller 303 from->
The filtered digital reference interference signals are eliminated to obtain digital cancellation results>
，
Digital cancellation result->
The input filter coefficient calculation module 404 performs iterative calculations.
In one embodiment, the step of obtaining the filter coefficients comprises: and calculating according to the digital cancellation result to obtain a filter coefficient as follows:
wherein ,
for the iteration factor->
For conjugate operation, ++>
For the filter coefficients +.>
For digital cancellation results, < >>
Is a filtered digital reference interference signal. In the present embodiment, the filter coefficient is calculated from the digital cancellation result, and specifically, the iteration factor may be 0.0001.
It should be understood that, although the steps in the flowchart of fig. 1 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in fig. 1 may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor do the order in which the sub-steps or stages are performed necessarily performed in sequence, but may be performed alternately or alternately with at least a portion of other steps or sub-steps of other steps.
In one embodiment, a computer device is provided, which may be a terminal, and the internal structure of which may be as shown in fig. 7. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program when executed by a processor is used for realizing a navigation signal receiving and transmitting isolation self-adaptive cancellation method based on a reference waveform. The display screen of the computer equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer equipment can be a touch layer covered on the display screen, can also be keys, a track ball or a touch pad arranged on the shell of the computer equipment, and can also be an external keyboard, a touch pad or a mouse and the like.
It will be appreciated by those skilled in the art that the structure shown in fig. 7 is merely a block diagram of some of the structures associated with the present application and is not limiting of the computer device to which the present application may be applied, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In an embodiment a computer device is provided comprising a memory storing a computer program and a processor implementing the steps of the method of the above embodiments when the computer program is executed.
In one embodiment, a computer readable storage medium is provided, on which a computer program is stored which, when executed by a processor, implements the steps of the method of the above embodiments.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (7)
1. A navigation signal receiving and transmitting isolation self-adaptive cancellation method based on a reference waveform, which is characterized by comprising the following steps:
the receiving antenna of the low-orbit satellite simultaneously receives the low-orbit navigation signal radiated outwards by the transmitting antenna and the medium-high-orbit navigation signal transmitted by the medium-high-orbit satellite to obtain a combined signal after combining;
taking a low-rail navigation signal transmitted at an antenna inlet of a transmitter as a simulation reference interference signal, and performing simulation cancellation according to the simulation reference interference signal and the combined signal to obtain a simulation cancellation result;
performing frequency conversion and sampling on the analog cancellation result to obtain an intermediate frequency digital signal, and performing frequency conversion and sampling on the analog reference interference signal to obtain a digital reference interference signal;
performing self-adaptive digital cancellation according to the digital reference interference signal and the intermediate frequency digital signal to obtain a digital cancellation result so as to realize receiving and transmitting isolation of the simultaneous same-frequency signals;
the step of obtaining the reference carrier estimation result includes:
performing power estimation on the simulation cancellation result to obtain a power estimation result of the simulation cancellation result;
according to the power estimation result, the current reference carrier estimation result is adjusted as follows:
wherein ,
is an in-phase component>
Is a quadrature component->
For the optimal amplitude of the reference carrier, +.>
Is the best phase of the reference carrier.
2. The method of claim 1, wherein the step of performing adaptive digital cancellation based on the digital reference interference signal and the intermediate frequency digital signal to obtain a digital cancellation result comprises:
inputting the digital reference interference signal into a time domain adaptive filter, and performing adaptive filtering by using a corresponding filter coefficient to obtain a filtered digital reference interference signal;
and canceling the filtered digital reference interference signals from the intermediate frequency digital signals to obtain digital cancellation results.
3. The method of claim 2, wherein the step of obtaining the filter coefficients comprises:
and calculating according to the digital cancellation result to obtain a filter coefficient as follows:
wherein ,
for the iteration factor->
For conjugate operation, ++>
For the filter coefficients +.>
In order to obtain the result of the digital cancellation,
is a filtered digital reference interference signal.
4. The method of claim 1, wherein the step of performing analog cancellation based on the analog reference interference signal and the combined signal to obtain an analog cancellation result comprises:
performing power division phase shift on the analog reference interference signal to obtain two paths of orthogonal components of the analog reference interference signal;
vector modulation is carried out on the two paths of orthogonal components according to the corresponding reference carrier estimation result, and a signal after vector modulation is obtained;
and carrying out cancellation processing on the vector modulated signal and the combined signal to obtain an analog cancellation result.
5. The method of claim 1 wherein the step of performing power estimation on the simulated cancellation results to obtain power estimation results for the simulated cancellation results comprises:
performing analog power estimation on the analog cancellation result to obtain an analog power estimation result, and performing digital power estimation on the intermediate frequency digital signal to obtain a digital power estimation result;
and obtaining a power estimation result of the simulation cancellation result according to the simulation power estimation result and the digital power estimation result.
6. The method of claim 1, wherein the step of adjusting the current reference carrier estimate based on the power estimate comprises:
traversing the phase in a preset phase searching range, and obtaining an optimal phase according to a phase value when a power estimation result is minimum;
according to the power estimation result, adjusting the amplitude to minimize the power estimation result to obtain the optimal amplitude;
and obtaining a current reference carrier estimation result according to the optimal phase and the optimal amplitude.
7. The method of claim 1, wherein the preset phase search range is 0-2 pi.
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| CN115657085B (en) * | 2022-09-21 | 2024-04-16 | 北京跟踪与通信技术研究所 | Multichannel anti-interference device and signal processing method |
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| CN111600620A (en) * | 2020-03-27 | 2020-08-28 | 中国人民解放军海军工程大学 | Analog cancellation device and method for eliminating interference |
| CN111697983A (en) * | 2020-03-27 | 2020-09-22 | 中国人民解放军海军工程大学 | Linear frequency modulation continuous wave radar receiving and transmitting interference cancellation device and control algorithm thereof |
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| 全球导航卫星系统接收机的复信号自适应陷波干扰抑制;周超;王跃科;乔纯捷;戴卫华;;国防科技大学学报(05);全文 * |
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