CN111970023A - Signal transmitting and receiving device, electronic device and equipment - Google Patents
Signal transmitting and receiving device, electronic device and equipment Download PDFInfo
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Abstract
The application provides a signal transceiver, an electronic device and equipment. A signal transmitting and receiving apparatus comprising: at least one transmit channel for transmitting a first signal; at least one receiving channel for receiving a second signal; the second signal comprises an echo signal formed based on the first signal and an interference signal formed by the first signal leaking to the receiving channel; the receiving channel comprises a first mixer, and the first mixer is used for carrying out down-conversion on a second signal received by the receiving channel based on a reference signal; and the frequency of the first signal is different from the frequency of the reference signal. The signal transceiver provided by the application can reduce the leakage interference of signals.
Description
The invention requires Chinese patent office filed on 28.02/2020 with application number 202010131001.5 and application name "Transceiver"; china patent office filed on 28.02/2020, application number 202010131614.9, entitled "apparatus and method for detecting transceiver"; and the priority of the chinese application patent application filed on 28.02/2020, having application number 202010131029.9 and entitled "radar transceiver machine control method and system," which is incorporated by reference herein in its entirety.
Technical Field
The present application relates to the field of electronic circuit technology, and in particular, to a signal transceiver, an electronic device, and an apparatus.
Background
A transmitter is an important component in communication, sensor and other systems, and is mainly used for transmitting and receiving signals. In normal operation of a transmitter, part of a transmission signal may directly leak from a transmission module of the transmitter to a receiving module of the transmitter, and thus may interfere with the receiving module.
At present, the receiver industry with less power of the transmitting module generally achieves the purpose of anti-interference by reducing the energy of the leakage signal.
However, the receiving module still suffers from interference of leaked transmission signals, especially in a transmitter with a large power of the transmitting module, and the large power of the leaked signals may even cause damage to parts of devices in the receiving module.
Disclosure of Invention
The application provides a signal transmitting and receiving device, an electronic device and equipment, which can reduce the leakage interference of signals.
In a first aspect, an embodiment of the present application provides a signal transceiver, including:
at least one transmit channel for transmitting a first signal;
at least one receiving channel for receiving a second signal; the second signal comprises an echo signal formed based on the first signal and an interference signal formed by the first signal leaking to the receiving channel;
the receiving channel comprises a first mixer, and the first mixer is used for carrying out down-conversion on a second signal received by the receiving channel based on a reference signal; and
the frequency of the first signal is different from the frequency of the reference signal, and/or the frequency of the interference signal is different from the frequency of the reference signal.
Optionally, in the signal transceiver provided in the present application, the first signal is a millimeter wave signal; and
when the frequency of the interference signal is different from the frequency of the reference signal, the difference between the frequency of the interference signal and the frequency of the reference signal is greater than 0MHz and less than or equal to 100 MHz.
Optionally, the signal transceiver provided in this application further includes:
the first signal source is used for providing local oscillation signals to the transmitting channel and the receiving channel; and
a second signal source for providing a frequency shifted signal to the transmit channel or the receive channel;
the local oscillator signal and the frequency shift signal are used for forming a first signal and a reference signal.
Optionally, in the signal transceiving apparatus provided in the present application, the transmit channel includes a second mixer;
when the second signal source is used for providing a frequency shift signal to the transmitting channel, the second mixer may be used for performing up-conversion or down-conversion on the local oscillator signal based on the frequency shift signal to obtain a first signal; and
the reference signal is a local oscillator signal.
Optionally, in the signal transceiving apparatus provided by the present application, the signal transceiving apparatus further includes a third mixer;
when the second signal source is used for providing a frequency shift signal to the receiving channel, the third mixer can be used for performing up-conversion or down-conversion on the local oscillation signal based on the frequency shift signal to obtain a reference signal;
the first signal is a local oscillator signal.
Optionally, in the signal transceiver provided in the present application, the transmission channel includes a transmission antenna, and the transmission antenna is configured to transmit the first signal; and
the receive path includes a receive antenna for receiving the second signal.
In a second aspect, an embodiment of the present application further provides a signal transceiving apparatus, including at least one transceiving channel, where the transceiving channel includes a transmitting channel and a receiving channel; and
the receiving channel comprises a first mixer, and the first mixer is used for carrying out down-conversion on a signal received by the receiving channel based on the reference signal;
the frequency of the frequency modulation continuous wave signal transmitted by the transmitting channel is different from the frequency of the current reference signal.
Optionally, in the signal transmitting and receiving device provided by the present application, the frequency modulated continuous wave signal transmitted by the transmission channel is a local oscillator signal in the signal transmitting and receiving device, and the reference signal is a signal obtained by performing frequency mixing operation on the local oscillator signal based on the frequency shift signal; or
The reference signal is a local oscillation signal in the signal transmitting and receiving device, and the frequency modulation continuous wave signal transmitted by the transmitting channel is a signal obtained by performing frequency mixing operation on the local oscillation signal based on the frequency shift signal.
Optionally, in the signal transceiver provided in the present application, the frequency of the frequency-shifted signal is greater than 0MHz and less than or equal to 100 MHz.
Optionally, the signal transceiver provided in the present application, the frequency mixing operation is an up-conversion or a down-conversion.
In a third aspect, an embodiment of the present application further provides a signal transceiver, including:
the local oscillator signal source is used for providing local oscillator signals;
the transmitting antenna is connected with the local oscillator signal source and used for transmitting a first signal formed based on the local oscillator signal;
a receiving antenna for receiving a second signal; the second signal comprises an echo signal formed based on the first signal and an interference signal formed by the first signal leaking to a receiving channel;
the first frequency mixer is respectively connected with the receiving antenna and the local oscillator signal source;
the first frequency mixer is used for carrying out down-conversion on the second signal according to a reference signal formed based on the local oscillator signal to obtain a baseband signal; and
the frequency of the reference signal is different from the frequency of the first signal.
Optionally, the signal transceiver provided in this application further includes:
a frequency shift signal source for providing a frequency shift signal;
the frequency shift signal is used for mixing the local oscillation signal to obtain a first signal or a reference signal.
Optionally, the signal transceiver provided in this application further includes:
the second frequency mixer is respectively connected with the local oscillation signal source, the frequency shift signal source and the transmitting antenna;
the second frequency mixer is used for carrying out up-conversion or down-conversion on the local oscillation signal by using the frequency shift signal to obtain a first signal; and
the reference signal is a local oscillator signal.
Optionally, the signal transceiver provided in this application further includes:
the third mixer is respectively connected with the local oscillation signal source, the frequency shift signal source and the first mixer;
the third mixer is used for performing up-conversion or down-conversion on the local oscillation signal by using the frequency shift signal to obtain a reference signal; and
the first signal is a local oscillator signal.
Optionally, in the signal transceiver provided in the present application, the first signal is a millimeter wave signal; and
the frequency of the frequency shifted signal is greater than 0MHz and less than or equal to 100 MHz.
In a fourth aspect, an embodiment of the present application is also an electronic device, including:
the signal transmitting/receiving device of any one of the above; and
and the signal processing module is used for processing the signal obtained by frequency reduction based on the second signal so as to carry out target detection and/or communication.
Optionally, in the electronic device provided by the application, the signal transceiver is a millimeter wave radar chip.
Optionally, in the electronic device provided in the present application, the millimeter wave radar chip is an SoC chip having an AiP structure.
Optionally, in the electronic device provided by the present application, the signal processing module is further configured to eliminate a noise signal;
the noise signal comprises a noise signal which is leaked to a receiving channel by a transmitting channel and is subjected to frequency reduction processing by a first mixer.
In a fifth aspect, an embodiment of the present application provides an apparatus, including:
an apparatus body; and
and an electronic device provided in any one of the above-described devices.
The application provides a signal transceiver, electronic device and equipment, the frequency of the reference signal that the first mixer of signal transceiver received is different from the frequency of the interference signal received, namely there is the predetermined frequency difference between interference signal and the reference signal this moment, so that when making the first mixer lower the frequency of frequency to the second signal on the basis of the reference signal, avoid because the interference signal is the same with the reference signal frequency or comparatively close to, make the frequency reduction process produce defects such as interference and great direct current, etc., just also avoided because of the great direct current of first mixer output causes damages to other components and parts in the receiving module and devices such as this first mixer, even burn off scheduling problem.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a signal transceiver according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a signal transceiver according to a first embodiment of the present application;
fig. 3 is a schematic structural diagram of a signal transceiver according to a first embodiment of the present application;
fig. 4 is a schematic structural diagram of a signal transceiver according to a second embodiment of the present application;
fig. 5 is a first schematic structural diagram of a signal transceiver according to a third embodiment of the present application;
fig. 6 is a schematic structural diagram of a signal transceiver according to a third embodiment of the present application;
fig. 7 is a third schematic structural diagram of a signal transceiver according to a third embodiment of the present application;
fig. 8 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present application;
fig. 9 is a schematic structural diagram of an apparatus provided in the fifth embodiment of the present application.
Description of reference numerals:
100-signal transmitting and receiving device; 10-a transmit channel; 11-a second mixer; 12-a transmitting antenna; 20-a receive channel; 21-a first mixer; 22-a receiving antenna; 30-a reflector; 40-a first signal source; 50-a second signal source; 60-a third mixer; 70-a transmitting and receiving channel; 80-local oscillator signal source; 90-frequency shift signal source; 110. 110a, 110 b-amplifiers;
200-a signal processing module;
300-an electronic device;
400-apparatus body.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, an indirect connection through intervening media, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.
Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
A transmitter is an important component in communication, sensor and other systems, and can transmit and receive signals. During normal operation of a receiver, part of the signal may leak directly from the transmitter module of the receiver to the receiver module of the receiver. The leakage signal can cause severe interference to the receiving module. Generally, the purpose of anti-interference can be achieved by reducing the energy of the leakage signal, i.e. the isolation performance between the transmitting module and the receiving module is improved. However, the above-mentioned method for reducing leakage is only suitable for a receiver with a small transmission module power, and it is difficult to effectively reduce the leakage interference of signals for a receiver with a large transmission module power.
Based on this, the embodiment of the present application provides a signal transceiver, which can effectively reduce the leakage interference of signals.
The present application will now be described in detail with reference to the drawings and specific examples.
Example one
Fig. 1 is a first schematic structural diagram of a signal transceiver according to an embodiment of the present application. Referring to fig. 1, the signal transceiving apparatus 100 provided in the embodiment of the present application may include at least one transmitting channel 10 and at least one receiving channel 20, that is, the number of the transmitting channels 10 and the number of the receiving channels 20 may be flexibly set according to actual requirements, which is not limited in the embodiment of the present application. The following is a schematic illustration of the signal transceiver 100 of fig. 1 including a transmitting channel 10 and a receiving channel 20.
As shown in fig. 1, the transmission channel 10 may be used to transmit electromagnetic wave signals, such as millimeter waves (e.g., electromagnetic waves having a frequency of 30GHz-300 GHz), centimeter waves, etc., as first signals through the transmission antenna 12, the first signals being primarily used for communication and/or sensing, etc. The receiving channel 20 may receive an electromagnetic wave signal, i.e. a second signal, through the receiving antenna 22, and when the receiving channel 20 and the transmitting channel 10 form a signal transmitting and receiving channel, the receiving channel 20 is mainly used to receive an echo signal formed by the first signal reflected and/or scattered by the reflecting object 30 and other objects through the receiving antenna 22, and simultaneously the receiving antenna 22 may receive an interference signal formed by leakage of the transmitting channel 10 while receiving the echo signal, for example, a part of the signal that the first signal transmitted by the transmitting antenna 12 directly radiates to the receiving antenna 22, and the receiving antenna may receive an electromagnetic wave signal transmitted by other devices, for example, ground clutter. That is, the second signal received by the receiving antenna 22 may include various signals such as the echo signal, the interference signal formed by the leakage, and the ground clutter.
With continued reference to fig. 1, the receive path 20 may include a first mixer 21, and the first mixer 21 may be configured to mix (down-convert, as described below) a second signal received by the receive path 20 based on a reference signal to obtain, for example, a baseband signal. In practical applications, in order to reduce the difficulty and cost of implementation, the frequency of the first signal and the frequency of the reference signal may be kept at the same time.
In order to maintain a certain difference between the frequency of the first signal and the frequency of the reference signal, the first signal and the reference signal may be provided by different signal sources, or two signals with different frequencies may be obtained by performing a mixing process on a signal provided by another signal source through a mixer based on one signal source.
When the first mixer 21 performs the down-conversion operation, the frequency of the reference signal received by the first mixer 21 is different from the frequency of the received interference signal, that is, the reference signal and the interference signal have a predetermined frequency difference therebetween, so that when the first mixer 21 performs the down-conversion processing on the second signal based on the reference signal, the frequency drop processing is prevented from generating the interference and the large direct current due to the frequency of the interference signal being the same as or close to that of the reference signal, and the problems of damage or even burning of other components in the receiving module and the first mixer due to the large direct current output by the first mixer are also prevented.
Optionally, in an actual application scenario, since the first signal may be a signal whose frequency changes with time, such as a frequency modulated continuous wave, a situation that the frequency of the first signal is not consistent with the frequency of the interference signal may occur, but it is only necessary that the frequency of the interference signal is different from the frequency of the reference signal at the same time.
In addition, considering that the distances between the transmitting channel 10 and the receiving channel 20 are small, and the propagation speed is almost negligible compared to the electromagnetic wave, so to reduce the process difficulty and the cost, when the first mixer 21 performs the frequency-down operation, the frequencies of the first signal and the reference signal are different, that is, the frequency of the first signal is considered to be the same as or similar to the frequency of the interference signal but does not affect the result of the subsequent processing, and thus the defects of interference, large direct current and the like generated when the first mixer 21 performs the down-conversion processing due to the same frequency of the interference signal and the first signal can be effectively avoided.
Optionally, in the signal transceiver 100 provided in this embodiment of the present application, the first signal may be a millimeter wave signal, a centimeter wave signal, an ultrasonic wave signal, or the like.
When the frequency of the interference signal is different from the frequency of the reference signal, the difference between the frequency of the interference signal and the frequency of the reference signal may be greater than 0MHz and less than or equal to 100MHz, for example, the difference may be 1MHz, 5MHz, 10MHz, 20MHz, 50MHz, 80MHz, or 100MHz, and the like.
Fig. 2 is a schematic structural diagram of a signal transceiver according to a first embodiment of the present application; fig. 3 is a third schematic structural diagram of a signal transceiver according to an embodiment of the present application. In an alternative embodiment, the structures shown in fig. 2 and 3 may be understood based on the contents of the related art of fig. 1.
Referring to fig. 2 and 3, the signal transceiver 100 may further include a first signal source 40, a second signal source 50, a second mixer 11, and so on.
The first signal source 40 may be configured to provide signals to the first mixer 21 and the second mixer 11 at the same time, and in an alternative embodiment, the signal provided by the first signal source 40 may be a local oscillation signal in the signal transceiver 100, that is, the first signal source 40 may provide the above local oscillation signal to the first mixer 21 and the second mixer 11 at the same time. The local oscillator signal and the frequency shift signal are used for forming a first signal and a reference signal.
The second signal source 50 may be configured to provide a frequency-shifted signal to the transmitting channel 10 or the receiving channel 20, in the embodiment shown in fig. 2, the second signal source 50 is configured to provide a frequency-shifted signal to the transmitting channel 10, and the second mixer 11 may perform a frequency mixing process on the frequency-shifted signal and the local oscillator signal to obtain a first signal (i.e., a transmitting signal) with a frequency different from that of the local oscillator signal; for example, on the basis of the local oscillator signal, the local oscillator signal is down-frequency processed by using the frequency shift signal, so that the frequency of the first signal and the frequency of the local oscillator signal have a difference value of the frequency shift signal.
The first mixer 21 may perform a mixing process (i.e. down-convert, i.e. reduce the frequency) on the second signal received by the receiving antenna by using the local oscillator signal provided by the first signal source 40, so as to obtain an analog baseband signal. Due to the close distance between the transmitting antenna 12 in the transmitting channel 10 and the receiving antenna 22 in the receiving channel 20 in practical applications, and due to the limitations of the current technology and transmitter technology, the first signal transmitted by the transmitting antenna 12 inevitably leaks to the receiving channel 20, and if the first signal is received by the receiving antenna 22, the second signal includes the first signal with large power. However, because the frequency of the local oscillator signal received by the first mixer 21 is different from the frequency of the frequency shift signal, a larger direct current is not generated during the frequency mixing process, and thus the leakage interference is effectively reduced.
In the present embodiment, by providing at least two signal sources (e.g., two, three or more signal sources, etc.), the at least two signal sources can form a first signal and a reference signal with different frequencies through different combinations; for example, the local oscillator signal provided by the first signal source and the local oscillator signal provided by the second signal source may be mixed to obtain two signals with different frequencies, one of the two signals may be used as the first signal or the reference signal, and the other signal may be obtained through mixing.
As shown in fig. 2, the first signal source 40 may be connected to the transmitting channel 10 and the receiving channel 20, respectively, i.e. the first signal source 40 may provide local oscillation signals to the transmitting channel 10 and the receiving channel 20 at the same time. With continued reference to fig. 2, when the second signal source 50 is configured to provide a frequency-shifted signal to the transmission channel 10, the transmission channel 10 may include:
the second mixer 11 is configured to perform up-conversion or down-conversion on the local oscillator signal based on the frequency shift signal to obtain a first signal;
the first reference signal is a local oscillation signal.
Specifically, the transmission channel 10 and the reception channel 20 are both connected to a first signal source 40, and a second signal source 50 is connected to a second mixer 11. The second signal source 50 provides a frequency shift signal to the transmission channel 10, the first signal source 40 provides a first local oscillation signal to the transmission channel 10, the frequency shift signal and the first local oscillation signal enter the second mixer 11 of the transmission channel 10, and the second mixer 11 adjusts the frequency of the first local oscillation signal based on the frequency shift signal to obtain the first signal. That is, the first signal source directly provides the local oscillator signal as the reference signal to the receiving channel 20, and the frequency difference between the first signal and the reference signal is the frequency value of the frequency shift signal.
An echo signal and an interference signal formed based on the first signal are sent to the first mixer 21 of the receiving channel 20, the first signal source 40 provides the second local oscillation signal to the first mixer 21, and the first mixer 21 adjusts the second signal (i.e. the echo signal and the interference signal formed based on the first signal) received by the receiving channel 20 based on the second local oscillation signal. It should be noted that, in this embodiment, the first local oscillator signal and the second local oscillator signal may be signals with the same parameters, and the first local oscillator signal and the second local oscillator signal may be only signals that are provided by the first signal source 40 for distinguishing the signals respectively provided by the transmitting channel 10 and the receiving channel 20.
In the present embodiment, the difference between the frequency of the first signal and the frequency of the first reference signal is greater than 0MHz and less than or equal to 100 MHz. That is, the difference between the frequency of the first signal and the frequency of the local oscillator signal is greater than 0MHz and less than or equal to 100MHz, so that the signal output by the first mixer 21 is conveniently processed, and the influence of the signal output by the first mixer 21 on the receiving channel 20 is avoided.
Wherein, the difference can be 1MHz, 5MHz, 10MHz, 20MHz, 50MHz, 80MHz or 100MHz, etc.
Fig. 3 is a third schematic structural diagram of a signal transceiver according to an embodiment of the present application. Referring to fig. 3, when the second signal source 50 is used to provide a frequency-shifted signal to the receiving channel 20, the signal transceiver 100 further includes:
a third mixer 60, where the third mixer 60 may be configured to perform up-conversion or down-conversion on the local oscillator signal based on the frequency shift signal to obtain a first reference signal;
the first signal is a local oscillator signal.
Specifically, the transmitting channel 10 and the receiving channel 20 are both connected to a first signal source 40, the second signal source 50 is connected to a third mixer 60, and the third mixer 60 is connected to the first mixer 21. The first signal source 40 directly provides the local oscillator signal to the transmission channel 10 as the first signal, i.e. the frequency difference between the reference signal and the first signal is still the frequency value of the frequency shift signal.
The first signal source 40 provides a first local oscillation signal for the transmitting channel 10, and the first local oscillation signal is sent out through the transmitting channel 10, that is, the first signal sent out by the transmitting channel 10 is considered to be the first local oscillation signal or the amplified first local oscillation signal, and when an echo signal formed by the first signal is sent into the first mixer 21 of the receiving channel 20, the first reference signal may also be sent into the first mixer 21.
Wherein the first reference signal fed into the first mixer 21 can be obtained in the following manner. The second signal source 50 provides a frequency shift signal to the third mixer 60, and at the same time, the first signal source 40 provides a second local oscillation signal to the third mixer 60, the frequency shift signal and the second local oscillation signal enter the third mixer 60, and the third mixer 60 performs up-conversion or down-conversion on the second local oscillation signal based on the frequency shift signal to obtain a first reference signal.
Optionally, the transmission channel 10 includes a transmission antenna 12, and the transmission antenna 12 is configured to transmit the first signal; and the receive path 20 includes a receive antenna 22, the receive antenna 22 for receiving the second signal.
In this embodiment, the transmitting antenna 12 and the receiving antenna 22 may be disposed on an antenna board, and the rest of the components may be integrated into a chip, so that the antenna board and the chip together form a sensing system or a communication system. Meanwhile, the transmitting antenna 12, the receiving antenna 22 and other components may be integrated in the same chip structure, or the transmitting antenna 12 and the receiving antenna 22 may be integrated in a Package structure of a chip, so as to form a sensing system or a communication system of a single-chip AiP (antenna in Package) structure.
Example two
Fig. 4 is a schematic structural diagram of a signal transceiver according to a second embodiment of the present application. Referring to fig. 4, the embodiment of the present application provides a signal transceiving apparatus 100, which includes at least one transceiving channel 70, where the transceiving channel 70 includes a transmitting channel 10 and a receiving channel 20; and
the receiving channel 20 comprises a first mixer 21, the first mixer 21 being configured to down-convert a signal received by the receiving channel 20 based on a reference signal;
the transmitting channel 10 is configured to transmit a frequency modulated continuous wave signal, and a frequency of the frequency modulated continuous wave signal transmitted by the transmitting channel 10 is different from a frequency of a current reference signal.
As shown in fig. 4, the transmission channel 10 may be used to transmit frequency modulated continuous wave signals such as millimeter waves (e.g., electromagnetic waves having a frequency of 30GHz-300 GHz), centimeter waves, and the like, through a transmission antenna. The receive channel 20 may receive the frequency modulated continuous wave signal via a receive antenna.
Specifically, after the signal transmitted by the transmitting channel 10 is reflected by the reflector 30, a frequency modulated continuous wave signal that changes with time is formed, the frequency modulated continuous wave signal is received by the receiving channel 20 and enters the first mixer 21 of the receiving channel 20, and the first mixer 21 adjusts the frequency modulated continuous wave signal received by the receiving channel 20 based on the reference signal, so as to reduce the frequency of the frequency modulated continuous wave signal received by the receiving channel 20. Therefore, the signal output by the first mixer 21 does not generate a direct current signal, so that the interference of the leakage signal can be reduced, the influence of the leakage signal on the receiving channel 20 can be reduced, and the performance of the receiving channel 20 can be ensured.
By providing a plurality of transmission/reception channels 70, the signal transmission/reception device can transmit/receive a multi-channel signal.
In the above embodiment, for any of the transmitting and receiving channels 70, since there is a certain difference between the frequency of the signal transmitted by the transmitting channel 10 and the frequency of the reference signal received by the frequency mixer performing the down-conversion processing in the receiving channel 20, it is further possible to effectively avoid interference caused by the leakage 10 of the transmitting channel when the first frequency mixer 21 performs the down-conversion processing, and at the same time, avoid direct current generated by the down-conversion processing due to the received leakage signal being the same as or close to the frequency of the reference signal.
In a possible implementation manner, the frequency-modulated continuous wave signal transmitted by the transmission channel 10 is a local oscillator signal in the signal transceiver 100, and the reference signal is a signal obtained by performing frequency mixing operation on the local oscillator signal based on the frequency shift signal. The implementation manner is the same as the embodiment in fig. 3, and is not described herein again.
In another possible implementation manner, the reference signal is a local oscillator signal in the signal transmitting apparatus, and the frequency modulated continuous wave signal transmitted by the transmitting channel 10 is a signal obtained by performing frequency mixing operation on the local oscillator signal based on the frequency shift signal. The implementation manner is the same as the embodiment in fig. 2, and is not described herein again.
In this embodiment, the mixing operation is up-conversion or down-conversion, i.e. increasing the frequency of the signal or decreasing the frequency of the signal.
In the present embodiment, the first signal is a millimeter wave signal (e.g., an electromagnetic wave with a frequency of 30GHz-300 GHz), a centimeter wave signal, or the like; the millimeter wave signals are adopted for communication, the communication frequency band is wide, the directivity is strong, and the interference is small.
Optionally, the frequency of the frequency-shifted signal is greater than 0MHz and less than or equal to 100 MHz. The frequency of the frequency shift signal can be 0.5MHz, 7MHz, 12MHz, 22MHz, 55MHz, 85MHz or 100MHz, etc.
EXAMPLE III
Fig. 5 is a schematic structural diagram of a signal transceiver according to a third embodiment of the present application. Referring to fig. 5, the present embodiment provides a signal transceiver 100, including:
a local oscillator signal source 80 for providing a local oscillator signal;
the transmitting antenna 12 is connected with the local oscillator signal source 80, and the transmitting antenna 12 is used for transmitting a first signal formed based on the local oscillator signal;
a receiving antenna 22 for receiving the second signal; the second signal comprises an echo signal formed based on the first signal;
a first mixer 21, which is connected to the receiving antenna 22 and the local oscillator signal source 80 respectively;
the first mixer 21 is configured to down-convert the second signal based on a reference signal formed by the local oscillator signal to obtain a baseband signal; and
the frequency of the reference signal is different from the frequency of the first signal.
Specifically, the transmitting antenna 12 and the first mixer 21 are both connected to the local oscillator signal source 80, and the local oscillator signal source 80 provides a first local oscillator signal and a second local oscillator signal for the transmitting antenna 12 and the first mixer 21, respectively. The transmitting antenna 12 transmits a first signal formed based on the first local oscillation signal, and the first signal is reflected by the reflector 30 to form an echo signal (i.e., a second signal). The first mixer 21 performs frequency conversion processing on the echo signal according to a reference signal formed based on the second local oscillation signal to reduce the frequency of the echo signal, thereby obtaining a baseband signal. The frequency of the reference signal is different from the frequency of the first signal.
The first signal travels more distance after encountering the reflection object 30, so that the frequency of the echo signal formed by the first signal is greater than that of the first signal in the first mixer 21 at the same time, and the frequency of the reference signal is different from that of the first signal. Thus, the signal output by the first mixer 21 does not generate a dc signal, thereby facilitating processing of the baseband signal and reducing the influence on the reception channel 20.
In the above embodiment, since the signal transmitted by the transmitting antenna 12 leaks to the receiving antenna 22, and the signal received by the receiving antenna 22 includes a transmitting signal with higher power, and when the conventional first mixer 21 performs down-conversion processing to obtain a baseband signal, the frequency of the reference signal used by the conventional first mixer is the same as the frequency of the transmitting signal, so that a larger direct current is generated during the down-conversion processing, but the frequency between the reference signal and the transmitting signal in this embodiment is different, so that when the first mixer 21 performs down-conversion processing to obtain the baseband signal, the first mixer does not generate a larger direct current due to the leakage of the transmitting signal, and meanwhile, since the reference signal and the transmitting signal have a preset frequency difference, it is convenient to remove a noise signal generated by the leaking signal in the subsequent signal processing process.
Fig. 6 is a schematic structural diagram of a signal transceiver according to a third embodiment of the present application. Referring to fig. 6, the signal transceiver 100 provided in this embodiment further includes a frequency shift signal source 90, where the frequency shift signal source 90 is configured to provide a frequency shift signal; the frequency shift signal is used for mixing the local oscillation signal to obtain a first signal or a reference signal.
In the embodiment, on the basis of a conventional signal transceiver, a frequency shift signal source 90 is added to provide a frequency shift signal, and the local oscillator signal is mixed by using the frequency shift signal, so that the frequency difference between the transmission signal and the reference signal is preset.
Referring to fig. 6, the signal transceiver 100 provided in this embodiment further includes:
the second frequency mixer 11 is respectively connected with the local oscillator signal source 80, the frequency shift signal source 90 and the transmitting antenna 12; the second mixer 11 is configured to perform up-conversion or down-conversion on the local oscillator signal by using the frequency shift signal to obtain a first signal; and the reference signal is a local oscillator signal. That is, the reference signal may be a signal obtained by performing, for example, amplification processing on the local oscillation signal, that is, the frequency of the reference signal is consistent with the frequency of the local oscillation signal.
The amplifier 110 may be added between the frequency shift signal source 90 and the second mixer 11, between the second mixer 11 and the transmitting antenna 12, between the first mixer 21 and the receiving antenna 22, and after the first mixer 21. That is, when signals are input and output to and from the second mixer 11 and the first mixer 21, the voltage or power of the electrical signals is amplified by the amplifier 110. So as to compensate the loss of the electric signal in the transmission process.
In the signal transceiver 100 provided in this embodiment, the local oscillator signal source 80 generates a frequency shift signal with a certain frequency, and the frequency shift signal is amplified by the amplifier 110a and then sent to the second mixer 11. The second mixer 11 receives the frequency shift signal from the frequency shift signal source 90 and the first local oscillator signal from the local oscillator signal source 80 simultaneously and generates a transmission signal (i.e. the first signal) having a frequency equal to or different from the sum or difference of the frequencies of the frequency shift signal and the local oscillator signal. After the leakage signal enters the receiving antenna 22 and the amplifier 110b through the leakage path, because the leakage signal has the same frequency as the transmission signal, after the frequency mixing operation is performed on the leakage signal and the second local oscillation signal sent by the local oscillation signal source 80 in the first mixer 21, the output baseband signal is no longer direct current, the frequency of the baseband signal is the same as that of the frequency shift signal, and the processing of the baseband signal can be facilitated, so that the influence on the receiver is avoided.
Fig. 7 is a third schematic structural diagram of a signal transceiver according to a third embodiment of the present application. Referring to fig. 7, the signal transceiver 100 provided in this embodiment further includes:
the third mixer 60 is respectively connected with the local oscillator signal source 80, the frequency shift signal source 90 and the first mixer 21; the third mixer 60 is configured to perform up-conversion or down-conversion on the local oscillator signal by using the frequency shift signal to obtain a reference signal; and the first signal is a local oscillator signal.
Specifically, the first signal may be a signal obtained by performing, for example, amplification processing on the local oscillator signal, that is, the frequency of the first signal is consistent with the frequency of the local oscillator signal.
The present embodiment is different from the above-mentioned embodiment shown in fig. 6 in that a third mixer 60 is inserted between the local oscillation signal source 80 and the first mixer 21, and the output signal of the third mixer 60 is fed into the first mixer 21, so that the input signal of the first mixer 21 and the leakage signal have different frequencies, and therefore the baseband signal output by the first mixer 21 does not contain direct current, and does not affect the performance of the receiver.
In the present embodiment, the first signal is a millimeter wave signal (e.g., an electromagnetic wave with a frequency of 30GHz-300 GHz), a centimeter wave signal, or the like; the millimeter wave signals are adopted for communication, the communication frequency band is wide, the directivity is strong, and the interference is small.
Optionally, the frequency of the frequency-shifted signal is greater than 0MHz and less than or equal to 100 MHz. The frequency of the frequency-shifted signal may be 0.75MHz, 9MHz, 17MHz, 28MHz, 58MHz, 78MHz, 100MHz, or the like.
Example four
Fig. 8 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present application. Referring to fig. 8, an electronic device 300 is further provided in an embodiment of the present application, including the signal transceiver 100 provided in any one of the above embodiments; and a signal processing module 200, wherein the signal processing module 200 is configured to process a signal obtained by down-conversion based on the second signal to perform target detection and/or communication.
The structure and the operation principle of the signal transceiver 100 are explained in detail in the above embodiments, and are not described in detail here.
The signal processing module 200 may be a device for detecting or processing a signal, such as a baseband, and the signal processing module 200 may also wirelessly communicate a signal obtained by down-converting the second signal to a device capable of detecting the signal. Or, the baseband signal obtained by down-converting the second signal is processed by the signal processing module 200 and then transmitted to other devices through the signal processing module 200.
In this embodiment, since a certain frequency difference exists between the frequency of the transmission signal in the signal transceiver and the frequency of the reference signal for obtaining the baseband signal by frequency mixing, the isolation between the transmission channel and the reception channel can be effectively improved, and meanwhile, it is also effectively avoided that a large direct current is generated when the baseband signal is obtained due to the frequency coincidence between the transmission signal and the reference signal, and since the frequency difference between the transmission signal and the reference signal is preset, the interference signal caused by the leakage of the transmission signal can be removed conveniently in the following process.
In some embodiments, the signal transceiver 100 may be a sensor chip such as a millimeter wave radar chip, or may also be a communication chip such as 5G or 6G.
The millimeter wave radar chip is an SoC chip with AiP structure. The Chip is an integrated circuit Chip, which is an air in Package (SoC) Chip. The antenna and the chip are integrated in the package to realize the system-level wireless function.
In some embodiments, the signal processing module 200 is also used to eliminate noise signals;
the noise signal includes a noise signal that is leaked from the transmitting channel 10 to the receiving channel 20 and is down-converted by the first mixer 21.
EXAMPLE five
Fig. 9 is a schematic structural diagram of an apparatus provided in the fifth embodiment of the present application. Referring to fig. 9, an embodiment of the present application further provides an apparatus, including: an apparatus body 400; and the electronic device 300 provided in any one of the above embodiments provided on the apparatus body 400.
The structure and the operation principle of the electronic device 300 are explained in detail in the above embodiments, and are not described in detail here.
Wherein, the equipment body 400 can be intelligent transportation equipment (such as car, bicycle, motorcycle, boats and ships, subway, train etc.), security protection equipment (such as the camera), intelligent wearing equipment (such as bracelet, glasses etc.), intelligent household equipment (such as TV, air conditioner, intelligent lamp etc.), various communications facilities (such as cell-phone, dull and stereotyped electric energy etc.) etc. and such as banister, intelligent transportation pilot lamp, intelligent sign, traffic camera and various industrialization manipulator (or robot) etc. this embodiment does not do the restriction here.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (20)
1. A signal transceiving apparatus, comprising:
at least one transmit channel for transmitting a first signal;
at least one receiving channel for receiving a second signal; the second signal comprises an echo signal formed based on the first signal and an interference signal formed by the first signal leaking to the receiving channel;
wherein the receive channel comprises a first mixer to down-convert the second signal received by the receive channel based on a reference signal; and
the frequency of the first signal is different from the frequency of the reference signal, and/or the frequency of the interference signal is different from the frequency of the reference signal.
2. The signal transceiving apparatus of claim 1, wherein the first signal is a millimeter wave signal; and
when the frequency of the interference signal is different from the frequency of the reference signal, the difference between the frequency of the interference signal and the frequency of the reference signal is greater than 0MHz and less than or equal to 100 MHz.
3. The signal transceiving apparatus of claim 1, further comprising:
the first signal source is used for providing local oscillation signals to the transmitting channel and the receiving channel; and
a second signal source for providing a frequency shifted signal to the transmit channel or the receive channel;
wherein the local oscillator signal and the frequency shifted signal are used to form the first signal and the reference signal.
4. The signal transceiving apparatus of claim 3, wherein the transmit channel comprises a second mixer;
when the second signal source is configured to provide a frequency shift signal to the transmission channel, the second mixer may be configured to perform up-conversion or down-conversion on the local oscillator signal based on the frequency shift signal to obtain the first signal; and
the reference signal is the local oscillator signal.
5. The signal transceiving apparatus of claim 3, further comprising a third mixer;
when the second signal source is configured to provide a frequency shift signal to the receiving channel, the third mixer may be configured to perform up-conversion or down-conversion on the local oscillator signal based on the frequency shift signal to obtain the reference signal;
wherein the first signal is the local oscillator signal.
6. The apparatus according to any one of claims 1-5, wherein the transmission channel comprises a transmission antenna, and the transmission antenna is configured to transmit the first signal; and
the receive path includes a receive antenna for receiving the second signal.
7. A signal transceiver is characterized by comprising at least one transceiver channel, wherein the transceiver channel comprises a transmitting channel and a receiving channel; and
the receive channel comprises a first mixer to downconvert a signal received by the receive channel based on a reference signal;
and the frequency of the frequency-modulated continuous wave signal transmitted by the transmitting channel is different from the frequency of the current reference signal.
8. The signal transceiver according to claim 7, wherein the frequency modulated continuous wave signal transmitted by the transmission channel is a local oscillator signal in the signal transceiver, and the reference signal is a signal obtained by mixing the local oscillator signal based on a frequency shift signal; or
The reference signal is a local oscillation signal in the signal transmitting and receiving device, and the frequency modulation continuous wave signal transmitted by the transmitting channel is a signal obtained by performing frequency mixing operation on the local oscillation signal based on the frequency shift signal.
9. The signal transceiving apparatus of claim 8, wherein the frequency of the frequency shifted signal is greater than 0MHz and less than or equal to 100 MHz.
10. The apparatus of claim 8, wherein the mixing operation is one of up-conversion and down-conversion.
11. A signal transceiving apparatus, comprising:
the local oscillator signal source is used for providing local oscillator signals;
the transmitting antenna is connected with the local oscillator signal source and used for transmitting a first signal formed based on the local oscillator signal;
a receiving antenna for receiving a second signal; the second signal comprises an echo signal formed based on the first signal and an interference signal formed by the first signal leaking to a receiving channel;
the first frequency mixer is respectively connected with the receiving antenna and the local oscillator signal source;
the first mixer is used for performing down-conversion on the second signal according to a reference signal formed based on the local oscillator signal to obtain a baseband signal; and
the frequency of the reference signal is different from the frequency of the first signal.
12. A signal transceiving apparatus according to claim 11, further comprising:
a frequency shift signal source for providing a frequency shift signal;
the frequency shift signal is used for mixing the local oscillator signal to obtain the first signal or the reference signal.
13. A signal transceiving apparatus according to claim 12, further comprising:
the second frequency mixer is respectively connected with the local oscillation signal source, the frequency shift signal source and the transmitting antenna;
the second mixer is configured to perform up-conversion or down-conversion on the local oscillator signal by using the frequency shift signal to obtain the first signal; and
the reference signal is the local oscillator signal.
14. A signal transceiving apparatus according to claim 12, further comprising:
the third mixer is respectively connected with the local oscillation signal source, the frequency shift signal source and the first mixer;
the third mixer is configured to perform up-conversion or down-conversion on the local oscillator signal by using the frequency shift signal to obtain the reference signal; and
the first signal is the local oscillator signal.
15. A signal transceiving apparatus according to any one of claims 12 to 14, wherein the first signal is a millimeter wave signal; and
the frequency of the frequency shift signal is greater than 0MHz and less than or equal to 100 MHz.
16. An electronic device, comprising:
the signal transmission/reception device according to any one of claims 1 to 6, 7 to 10, and 11 to 15; and
and the signal processing module is used for processing the signal obtained by frequency reduction based on the second signal so as to carry out target detection and/or communication.
17. The electronic device according to claim 16, wherein the signal transceiver is a millimeter wave radar chip.
18. The electronic device of claim 17, wherein the millimeter wave radar chip has an SoC chip of AiP configuration.
19. The electronic device of any of claims 16-18, wherein the signal processing module is further configured to remove noise signals;
wherein the noise signal comprises a noise signal which is leaked to the receiving channel by a transmitting channel and is subjected to frequency reduction processing by the first mixer.
20. An apparatus, comprising:
an apparatus body; and
the electronic device of any one of claims 16-19 disposed on the apparatus body.
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| CN202010760122.6A Active CN112019232B (en) | 2020-02-28 | 2020-07-31 | Signal transmitting and receiving device, electronic device and equipment |
| CN202010761980.2A Pending CN111970023A (en) | 2020-02-28 | 2020-07-31 | Signal transmitting and receiving device, electronic device and equipment |
| CN202010789205.8A Active CN111965605B (en) | 2020-02-28 | 2020-08-07 | Frequency modulation continuous wave signal transmitting device, method for transmitting frequency modulation continuous wave signal, signal transmitting/receiving device, electronic device and equipment |
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| CN113259023B (en) * | 2021-04-19 | 2022-06-14 | 中国电子科技集团公司第二十九研究所 | Radiation power self-checking method and device based on radiation antenna coupling |
| CN115580338A (en) * | 2022-09-30 | 2023-01-06 | 中国星网网络创新研究院有限公司 | Power control method, device, equipment and storage medium |
| CN115549703B (en) * | 2022-10-09 | 2024-06-18 | 芯翼信息科技(上海)有限公司 | Transmitter and transceiver integrated with CMOS power amplifier |
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| Publication number | Publication date |
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| CN112019232A (en) | 2020-12-01 |
| CN111934790B (en) | 2022-06-28 |
| CN111934790A (en) | 2020-11-13 |
| CN111965605A (en) | 2020-11-20 |
| CN112019232B (en) | 2023-01-31 |
| CN111965605B (en) | 2024-04-12 |
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