CN108540414B - Modulation signal compatibility method, device and communication system - Google Patents
Modulation signal compatibility method, device and communication system Download PDFInfo
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- CN108540414B CN108540414B CN201710121666.6A CN201710121666A CN108540414B CN 108540414 B CN108540414 B CN 108540414B CN 201710121666 A CN201710121666 A CN 201710121666A CN 108540414 B CN108540414 B CN 108540414B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation
Abstract
The embodiment of the invention provides a modulation signal compatible method, a modulation signal compatible device and a communication system, wherein the method comprises the following steps: adjusting the sending parameters of the second signal (2FSK signal) sent by the sending end equipment and the receiving parameters of the second signal received by the receiving end equipment, so that the receiving end equipment can receive the second signal; in addition, the parameters of the first signal (OOK signal) sent by the sending end device and the parameters of the first signal received by the receiving end device are not changed, and the receiving end device can still receive the first signal. Therefore, by applying the scheme, the receiving end equipment can receive the first signal and the second signal, and compatibility is realized; and only parameters are adjusted, two functional modules are not required to be arranged, and equipment cost is not increased.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a modulation signal compatible method, device and communication system.
Background
In the communication process, in order to overcome the problem in long-distance signal transmission, the signal is generally required to be modulated, so that the signal spectrum is moved to a high-frequency channel for transmission. Currently, the modulation mode generally includes an amplitude modulation mode and a frequency modulation mode: the amplitude modulation method such as OOK (ON-OFF keying) can modulate the amplitude of the carrier wave; the frequency modulation method such as 2FSK (binary frequency-shift keying) can modulate the frequency of the carrier wave.
Generally, different modulation schemes are incompatible, for example, 2FSK and OOK are incompatible, and a device that performs modulation/demodulation by OOK cannot receive a signal modulated by 2 FSK. In the existing scheme, two functional modules are usually arranged in a receiving end device, one is used for demodulating a 2FSK modulated signal, and the other is used for demodulating an OOK modulated signal; in this way, the above-mentioned incompatibility problem can be solved; however, two kinds of functional modules are arranged in the equipment, so that the equipment cost is increased.
Disclosure of Invention
The embodiment of the invention aims to provide a modulation signal compatible method, a modulation signal compatible device and a communication system, which are compatible and do not increase the equipment cost.
In order to achieve the above object, an embodiment of the present invention discloses a modulation signal compatible method, which is applied to a sending end device, and the method includes:
sending a second signal by using the adjusted sending parameter, so that the receiving end equipment receives the second signal according to the adjusted receiving parameter; the second signal is a signal modulated by a frequency modulation mode; adjusting the receiving parameters according to the adjusted sending parameters;
wherein the transmission parameter includes a high frequency peak parameter and a low frequency peak parameter of the second signal, and the process of adjusting the transmission parameter includes:
determining the frequency of a first signal sent by the sending end equipment, wherein the first signal is a signal modulated by an amplitude modulation mode;
adjusting the high-frequency peak parameter to match the frequency;
and adjusting the low-frequency peak parameter according to a first receiving bandwidth of the receiving end equipment, wherein the first receiving bandwidth is a bandwidth of the receiving end equipment for receiving the first signal.
Optionally, the transmission parameter may further include a frequency difference parameter of the second signal; the process of adjusting the transmission parameters may further comprise:
adjusting the frequency difference parameter as: half of the sum of the high-frequency peak parameter and the low-frequency peak parameter;
the step of adjusting the low frequency peak parameter according to the first receiving bandwidth of the receiving end device may include:
adjusting the low-frequency peak parameter to: more than or equal to half of the first receiving bandwidth.
Optionally, the sending end device includes a frequency modulation mode and an amplitude modulation mode, and communicates with the frequency modulation device by using the frequency modulation mode and communicates with the amplitude modulation device by using the amplitude modulation mode;
the method may further comprise:
transmitting a handshake signal to receiving end equipment in a frequency modulation mode;
detecting whether a frequency modulation response signal sent by the receiving end equipment is received within a first preset time;
if yes, marking the receiving end equipment as frequency modulation equipment;
if not, marking the receiving end equipment as amplitude modulation equipment.
Optionally, before the step of marking the receiving end device as an amplitude modulation device, the method further includes:
sending a handshake signal to the receiving end equipment in an amplitude modulation mode;
detecting whether an amplitude modulation response signal sent by the receiving end equipment is received within a second preset time length or not;
if yes, the step of marking the receiving end equipment as amplitude modulation equipment is executed.
Optionally, the method may further include:
and deleting the self amplitude modulation mode under the condition that all receiving end equipment is marked as frequency modulation equipment.
In order to achieve the above object, an embodiment of the present invention further discloses a modulation signal compatible method, which is applied to receiving end equipment, and the method includes:
receiving a second signal sent by the sending terminal equipment by using the adjusted receiving parameter; the second signal is a signal modulated by a frequency modulation mode; the second signal is sent by the sending end equipment by using the adjusted sending parameter;
the receiving parameter includes a second receiving bandwidth, where the second receiving bandwidth is a bandwidth of the receiving end device receiving the second signal; the process of adjusting the receiving parameters comprises:
determining the adjusted transmission parameters;
and adjusting the second receiving bandwidth according to the adjusted sending parameters.
Optionally, the step of determining the adjusted transmission parameter may include:
determining the rate of a first signal sent by the sending end equipment, and the high-frequency peak parameter and the low-frequency peak parameter of a second signal sent by the sending end equipment; the first signal is a signal modulated by an amplitude modulation mode;
the step of adjusting the receiving bandwidth according to the adjusted sending parameter includes:
and adjusting the second receiving bandwidth according to the speed of the first signal, the high-frequency peak parameter and the low-frequency peak parameter.
Optionally, the step of adjusting the second receiving bandwidth according to the rate of the first signal, the high-frequency peak parameter, and the low-frequency peak parameter may include:
adjusting the second receive bandwidth to: the rate of the first signal is more than or equal to +2 frequency difference parameters +4 crystal oscillator frequency deviation; the frequency difference parameters are as follows: half of the sum of the high frequency peak parameter and the low frequency peak parameter.
Optionally, the receiving end device includes a band-pass filter circuit and a band-stop filter circuit; the step of adjusting the second receiving bandwidth may include:
adjusting, by the band pass filter circuit, the second receive bandwidth;
the method may further comprise:
filtering, by the band-stop filter circuit, the received second signal;
and demodulating the filtered second signal.
In order to achieve the above object, an embodiment of the present invention further discloses a modulation signal compatible apparatus, which is applied to a sending end device, and the apparatus includes:
the first sending module is used for sending a second signal by using the adjusted sending parameter so that the receiving end equipment receives the second signal according to the adjusted receiving parameter; the second signal is a signal modulated by a frequency modulation mode; adjusting the receiving parameters according to the adjusted sending parameters;
the device comprises a first sending module, a second sending module and a control module, wherein the sending parameters comprise high-frequency peak parameters and low-frequency peak parameters of a second signal, and the first adjusting module is used for adjusting the sending parameters;
the first adjustment module includes:
the first determining submodule is used for determining the frequency of a first signal sent by the sending end equipment, wherein the first signal is a signal modulated by an amplitude modulation mode;
a first adjusting submodule, configured to adjust the high-frequency peak parameter to match the frequency;
and the second adjusting submodule is used for adjusting the low-frequency peak parameter according to a first receiving bandwidth of the receiving end equipment, wherein the first receiving bandwidth is a bandwidth of the receiving end equipment for receiving the first signal.
Optionally, the sending parameter further includes a frequency difference parameter of the second signal; the first adjusting module may further include:
a third adjusting sub-module, configured to adjust the frequency difference parameter to: half of the sum of the high-frequency peak parameter and the low-frequency peak parameter;
the second adjusting submodule is specifically configured to:
adjusting the low-frequency peak parameter to: more than or equal to half of the first receiving bandwidth.
Optionally, the sending end device includes a frequency modulation mode and an amplitude modulation mode, and communicates with the frequency modulation device by using the frequency modulation mode and communicates with the amplitude modulation device by using the amplitude modulation mode;
the apparatus may further include:
the second sending module is used for sending a handshake signal to the receiving end equipment in a frequency modulation mode;
the first detection module is used for detecting whether a frequency modulation response signal sent by the receiving end equipment is received within a first preset time; if yes, triggering a first marking module, and if not, triggering a second marking module;
the first marking module is used for marking the receiving end equipment as frequency modulation equipment;
and the second marking module is used for marking the receiving end equipment as amplitude modulation equipment.
Optionally, the apparatus may further include:
a third sending module, configured to send a handshake signal to the receiving end device in an amplitude modulation mode when the first detecting module detects that the response signal sent by the receiving end device is not received within a first preset time period;
the second detection module is used for detecting whether an amplitude modulation response signal sent by the receiving end equipment is received within a second preset time length or not; and if so, triggering the second marking module.
Optionally, the apparatus may further include:
and the deleting module is used for deleting the self amplitude modulation mode under the condition that all the receiving end equipment is marked as frequency modulation equipment.
In order to achieve the above object, an embodiment of the present invention further discloses a modulation signal compatible apparatus, which is applied to a receiving end device, and the apparatus includes:
the receiving module is used for receiving a second signal sent by the sending terminal equipment by using the adjusted receiving parameter; the second signal is a signal modulated by a frequency modulation mode; the second signal is sent by the sending end equipment by using the adjusted sending parameter;
the receiving parameter includes a second receiving bandwidth, where the second receiving bandwidth is a bandwidth of the receiving end device receiving the second signal; the device also comprises a second adjusting module used for adjusting the receiving parameters;
the second adjusting module is specifically configured to:
determining the adjusted transmission parameters;
and adjusting the second receiving bandwidth according to the adjusted sending parameters.
Optionally, the second adjusting module may include:
the second determining submodule is used for determining the speed of the first signal sent by the sending end equipment and the high-frequency wave crest parameter and the low-frequency wave crest parameter of the second signal sent by the sending end equipment; the first signal is a signal modulated by an amplitude modulation mode;
and the fourth adjusting submodule is used for adjusting the second receiving bandwidth according to the speed of the first signal, the high-frequency wave peak parameter and the low-frequency wave peak parameter.
Optionally, the fourth adjusting submodule may be specifically configured to:
adjusting the second receive bandwidth to: the rate of the first signal is more than or equal to +2 frequency difference parameters +4 crystal oscillator frequency deviation; the frequency difference parameters are as follows: half of the sum of the high frequency peak parameter and the low frequency peak parameter.
Optionally, the receiving end device includes a band-pass filter circuit and a band-stop filter circuit; the second adjusting module may specifically be configured to:
determining the adjusted transmission parameters;
adjusting the second receiving bandwidth through the band-pass filter circuit according to the adjusted sending parameter;
the apparatus may further include:
the filtering module is used for filtering the received second signal through the band-elimination filtering circuit;
and the processing module is used for demodulating the filtered second signal.
In order to achieve the above object, an embodiment of the present invention further discloses a communication system, including: a sending terminal device and a receiving terminal device; wherein the content of the first and second substances,
the sending end equipment is used for sending a second signal by using the adjusted sending parameters; the second signal is a signal modulated by a frequency modulation mode; the sending parameters comprise a high-frequency peak parameter and a low-frequency peak parameter of the second signal;
the sending end device is further configured to adjust the sending parameter, and the adjusting process includes:
determining the frequency of a first signal sent by the sending end equipment, wherein the first signal is a signal modulated by an amplitude modulation mode; adjusting the high-frequency peak parameter to match the frequency; adjusting the low-frequency peak parameter according to a first receiving bandwidth of the receiving end device, wherein the first receiving bandwidth is a bandwidth of the receiving end device for receiving the first signal;
the receiving end device is configured to receive the second signal sent by the sending end device by using the adjusted receiving parameter; the receiving parameter comprises a second receiving bandwidth, and the second receiving bandwidth is a bandwidth of the receiving end device for receiving the second signal;
the receiving end device is further configured to adjust the receiving parameter, and the adjusting process includes:
determining the adjusted transmission parameters; and adjusting the second receiving bandwidth according to the adjusted sending parameters.
By applying the embodiment of the invention, the sending parameters of the second signal (2FSK signal) sent by the sending terminal equipment and the receiving parameters of the second signal received by the receiving terminal equipment are adjusted, so that the receiving terminal equipment can receive the second signal; in addition, the parameters of the first signal (OOK signal) sent by the sending end device and the parameters of the first signal received by the receiving end device are not changed, and the receiving end device can still receive the first signal. Therefore, by applying the scheme, the receiving end equipment can receive the first signal and the second signal, and compatibility is realized; and only parameters are adjusted, two functional modules are not required to be arranged, and equipment cost is not increased.
Of course, not all of the advantages described above need to be achieved at the same time in the practice of any one product or method of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flowchart of a modulation signal compatibility method applied to a sending-end device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the frequency spectrum of a 2FSK signal;
FIG. 3 is a schematic diagram of a frequency spectrum of an OOK signal;
FIG. 4 is a schematic diagram of a parameter adjustment process;
fig. 5 is a schematic flowchart of a modulation signal compatibility method applied to a receiving end device according to an embodiment of the present invention;
fig. 6 is a schematic view of an application scenario provided in the embodiment of the present invention;
fig. 7 is a schematic structural diagram of a modulation signal compatible apparatus applied to a sending end device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a modulation signal compatible apparatus applied to a receiving end device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
In order to solve the above technical problems, embodiments of the present invention provide a method, an apparatus, and a communication system for compatible modulation signals, where the method and the apparatus are applied to a sending end device and a receiving end device, and the sending end device and the receiving end device may be various electronic devices with communication functions, and are not limited specifically. First, a modulated signal compatibility method applied to a sending-end device according to an embodiment of the present invention is described in detail below.
Fig. 1 is a schematic flowchart of a method for compatible modulation signals applied to a sending-end device according to an embodiment of the present invention, where the method includes:
s101: the transmission parameters are adjusted.
It should be noted that the sending parameter includes a parameter of a second signal sent by the sending end device, and the second signal is a signal modulated by using a frequency modulation method.
The second signal may be understood as a signal modulated with 2FSK, hereinafter referred to as 2FSK signal. It will be appreciated by those skilled in the art that the spectrogram of a 2FSK signal may be as shown in fig. 2, having two peaks, one high frequency peak (1) and one low frequency peak (0).
The transmission parameters include a high-frequency peak parameter and a low-frequency peak parameter of the second signal, the high-frequency peak parameter corresponds to the high-frequency peak in fig. 2, and the low-frequency peak parameter corresponds to the low-frequency peak in fig. 2.
S101 may include S101A, S101B, and S101C:
S101A: determining the frequency of a first signal sent by sending end equipment, wherein the first signal is a signal modulated by an amplitude modulation mode.
The first signal may be understood as a signal modulated with OOK, hereinafter referred to as OOK signal. Those skilled in the art will understand that the spectrogram of the OOK signal can be as shown in fig. 3, which has only one peak, and the phase is 1 when there is frequency data, and the phase is 0 when there is no frequency data; the frequency is generally fixed.
S101B: and adjusting the high-frequency wave crest parameter to be matched with the frequency.
The high frequency peak parameter is adjusted to match the frequency, i.e., the high frequency peak parameter is adjusted to match the center frequency of the first signal. The peak of the OOK signal may be understood as the center frequency of the OOK signal; therefore, the high-frequency peak parameter is adjusted to match the center frequency of the first signal, and it can be understood that the high-frequency peak of the 2FSK signal is shifted to coincide with the peak of the OOK signal as shown in fig. 4.
S101C: and adjusting the low-frequency peak parameter according to a first receiving bandwidth of receiving end equipment, wherein the first receiving bandwidth is the bandwidth of the receiving end equipment for receiving the first signal.
It should be noted that the low-frequency peak parameter corresponding to the 2FSK signal sent by the sending end device needs to be greater than or equal to half of the receiving bandwidth (first receiving bandwidth) of the receiving end device for receiving the OOK signal, so that the receiving end device can receive the 2FSK signal. Thus, the low frequency peak parameter is adjusted to: the first receiving bandwidth is more than or equal to half of the first receiving bandwidth, and the first receiving bandwidth is the bandwidth of the receiving end equipment for receiving the first signal.
As an embodiment, the transmission parameter may further include a frequency difference parameter of the second signal, and the process of adjusting the transmission parameter may further include:
adjusting the frequency difference parameter as: half of the sum of the high frequency peak parameter and the low frequency peak parameter.
After adjusting the transmission parameters, S102 may be executed: sending a second signal by using the adjusted sending parameter, so that the receiving end equipment receives the second signal according to the adjusted receiving parameter; the second signal is a signal modulated by a frequency modulation mode; and the receiving parameters are adjusted according to the adjusted sending parameters.
It should be noted that the receiving end device also needs to adjust the receiving parameter to receive the second signal sent by the sending end device.
The receiving parameter comprises a second receiving bandwidth, and the second receiving bandwidth is a bandwidth of the receiving end device for receiving the second signal; the process of adjusting the reception parameter may include:
and adjusting the second receiving bandwidth according to the speed of the first signal, the high-frequency peak parameter and the low-frequency peak parameter.
Specifically, the second receiving bandwidth may be adjusted to: the rate of the first signal is more than or equal to +2 frequency difference parameters and +4 crystal oscillator frequency deviation, and the frequency difference parameters are as follows: half of the sum of the high frequency peak parameter and the low frequency peak parameter.
As will be appreciated by those skilled in the art, OOK generally appears earlier than 2FSK, with 2FSK performance superior to OOK; while many devices used earlier (hereinafter, referred to as old devices) can transmit and receive the first signal (OOK signal), they cannot receive the 2FSK signal, and many upgraded devices (hereinafter, referred to as new devices) can transmit and receive the second signal (2FSK signal) and also the first signal (OOK signal).
Therefore, in the transition stage of equipment upgrading, the problem that the old equipment cannot receive the 2FSK signal exists. By applying the scheme, the sending parameters of the new equipment are adjusted, and the receiving parameters of the old equipment are adjusted, so that the old equipment can also receive the 2FSK signals sent by the new equipment. In addition, the scheme has no influence on the sending and receiving of the OOK signal by the old equipment, and has no influence on the sending and receiving of the OOK signal and the 2FSK signal by the new equipment, thereby realizing the communication between each equipment and each modulation mode.
With the embodiment of the present invention shown in fig. 1, the sending parameters of the second signal (2FSK signal) sent by the sending end device and the receiving parameters of the second signal received by the receiving end device are adjusted, so that the receiving end device can receive the second signal; in addition, the parameters of the first signal (OOK signal) sent by the sending end device and the parameters of the first signal received by the receiving end device are not changed, and the receiving end device can still receive the first signal. Therefore, by applying the scheme, the receiving end equipment can receive the first signal and the second signal, and compatibility is realized; and only parameters are adjusted, two functional modules are not required to be arranged, and equipment cost is not increased.
As an embodiment, the sending end device may include a frequency modulation mode and an amplitude modulation mode, and the sending end device communicates with the frequency modulation device using the frequency modulation mode and communicates with the amplitude modulation device using the amplitude modulation mode.
For example, the new device in the application scenario may be used as both the sending end device and the receiving end device. When the device is used as a sending terminal device, the device can modulate and send signals by using OOK or 2 FSK; when the device serves as a receiving-end device, the device can receive an OOK signal and also can receive a 2FSK signal. Therefore, the device can set the above two modes of the frequency modulation mode (2FSK mode) and the amplitude modulation mode (OOK mode).
It should be noted that the "sending end device" executing the illustrated embodiment of the present invention may be both a sending end device and a receiving end device (having receiving and sending functions). The device that transmits/receives the second signal (2FSK signal) is referred to herein as a frequency modulation device, and the device that transmits/receives the first signal (OOK signal) is referred to as an amplitude modulation device.
Specifically, the sending end device may send a handshake signal to the receiving end device in the frequency modulation mode; detecting whether a frequency modulation response signal sent by the receiving end equipment is received within a first preset time; if yes, marking the receiving end equipment as frequency modulation equipment; if not, marking the receiving end equipment as amplitude modulation equipment.
It should be emphasized that the above-mentioned "receiving end device" may be both the sending end device and the receiving end device (having receiving and sending functions).
It can be understood that the sending end device sends signals in the frequency modulation mode, that is, 2FSK signals are sent by using 2 FSK; if the opposite-end receiving end equipment is frequency modulation equipment, a frequency modulation response signal is replied to the sending end equipment after the handshake signal is received; if the opposite-end receiving end equipment is amplitude modulation equipment, the handshake signals cannot be received, and the response signals cannot be sent.
Therefore, if the sending end device detects that the frequency modulation response signal sent by the receiving end device is received within the first preset time length, the receiving end device is indicated to be the frequency modulation device, and the receiving end device is marked as the frequency modulation device; the transmitting end device can communicate with the receiving end device in a frequency modulation mode in the subsequent communication process with the receiving end device. If the sending end device detects that the frequency modulation response signal sent by the receiving end device is not received within the first preset time length, the receiving end device is indicated to be amplitude modulation device, and the receiving end device is marked to be amplitude modulation device; the transmitting end device may communicate with the receiving end device in an amplitude modulation mode during subsequent communication with the receiving end device.
Or, as another embodiment, if the sending end device detects that the response signal sent by the receiving end device is not received within the first preset time period, the sending end device may send a handshake signal to the receiving end device in an amplitude modulation mode; detecting whether an amplitude modulation response signal sent by the receiving end equipment is received within a second preset time length or not; if yes, the receiving end equipment is marked as amplitude modulation equipment.
It can be understood that, if the sending end device does not receive the response signal sent by the receiving end device within the first preset time period, the response signal may also be caused by signal delay or other reasons, in this case, the sending end device may switch to the amplitude modulation mode, send the OOK handshake signal to the receiving end device again, and further determine whether the receiving end device is an amplitude modulation device.
If the receiving end equipment is amplitude modulation equipment, after receiving the handshake signal, an amplitude modulation response signal is replied to the sending end equipment; therefore, if the sending end device detects that the amplitude modulation response signal sent by the receiving end device is received within a second preset time length, the receiving end device is marked as amplitude modulation device; the transmitting end device may communicate with the receiving end device in an amplitude modulation mode during subsequent communication with the receiving end device.
Alternatively, the above scheme may also be: sending a handshake signal to receiving end equipment by the sending end equipment in an amplitude modulation mode; detecting whether an amplitude modulation response signal sent by the receiving end equipment is received within a first preset time length or not; if yes, marking the receiving end equipment as amplitude modulation equipment; if not, the receiving end equipment is marked as frequency modulation equipment.
Alternatively, the above scheme may also be: sending a handshake signal to receiving end equipment by the sending end equipment in an amplitude modulation mode; detecting whether an amplitude modulation response signal sent by the receiving end equipment is received within a first preset time length or not; if yes, marking the receiving end equipment as amplitude modulation equipment; if not, transmitting a handshake signal to the receiving end equipment in a frequency modulation mode; detecting whether a frequency modulation response signal sent by the receiving end equipment is received within a second preset time; if yes, the receiving end equipment is marked as frequency modulation equipment.
The first preset time length and the second preset time length may be the same or different, and may be set according to an actual situation, which is not limited specifically.
As an embodiment, the sending-end device may delete its own am mode when all receiving-end devices are marked as fm devices.
As will be understood by those skilled in the art, in general, the frequency modulation device is an upgrade device of an amplitude modulation device, and in the device upgrade transition stage, both the frequency modulation device and the amplitude modulation device exist in the communication system, in this case, the sending end device records that each receiving end device is a frequency modulation device or an amplitude modulation device, and communicates with the frequency modulation device by using a frequency modulation mode, and communicates with the amplitude modulation device by using an amplitude modulation mode. However, when all devices are upgraded to frequency modulation devices, that is, when the sending end device marks all receiving end devices as frequency modulation devices, the sending end device does not need to keep the amplitude modulation mode and delete the amplitude modulation mode.
Correspondingly, an embodiment of the present invention provides a method for compatible modulation signals applied to a receiving end device, as shown in fig. 5, including:
s501: and adjusting the receiving parameters.
It should be noted that the receiving parameter includes a parameter for receiving a second signal by a receiving end device, where the second signal is a signal modulated by using a frequency modulation method.
The second signal may be understood as a signal modulated with 2FSK, hereinafter referred to as 2FSK signal. It will be appreciated by those skilled in the art that the spectrogram of a 2FSK signal may be as shown in fig. 2, having two peaks, one high frequency peak (1) and one low frequency peak (0).
The receiving parameter includes a second receiving bandwidth, and the second receiving bandwidth is a bandwidth of the receiving end device receiving the second signal.
S501 may include S501A and S501B:
S501A: the adjusted transmission parameters are determined.
The "adjusted transmission parameter" may be understood as the transmission parameter adjusted by the sending end device in the embodiment shown in fig. 1 of the present invention. The receiving end device may obtain the "adjusted sending parameter" from the sending end device in advance, and the specific manner is not limited.
As an embodiment, S501A may include: determining the rate of a first signal sent by the sending end equipment, and the high-frequency peak parameter and the low-frequency peak parameter of a second signal sent by the sending end equipment; the first signal is a signal modulated by an amplitude modulation mode.
The first signal may be understood as a signal modulated with OOK, hereinafter referred to as OOK signal. Those skilled in the art will understand that the spectrogram of the OOK signal can be as shown in fig. 3, which has only one peak, and the phase is 1 when there is frequency data, and the phase is 0 when there is no frequency data; the frequency is generally fixed. The high frequency peak parameters correspond to the high frequency peaks in fig. 2, and the low frequency peak parameters correspond to the low frequency peaks in fig. 2.
S501B: and adjusting the second receiving bandwidth according to the adjusted sending parameters.
Continuing with the above embodiment, S501B may include: and adjusting the second receiving bandwidth according to the speed of the first signal, the high-frequency peak parameter and the low-frequency peak parameter.
Specifically, the second receiving bandwidth may be adjusted to: the rate of the first signal is more than or equal to +2 frequency difference parameters +4 crystal oscillator frequency deviation; the frequency difference parameters are as follows: half of the sum of the high frequency peak parameter and the low frequency peak parameter.
After adjusting the receiving parameters, S502 may be executed: receiving a second signal sent by the sending terminal equipment by using the adjusted receiving parameter; the second signal is a signal modulated by a frequency modulation mode; the second signal is sent by the sending end device by using the adjusted sending parameter.
It should be noted that the scheme for adjusting the transmission parameter by the sending end device has been described in detail in the embodiment shown in fig. 1, and is not described herein again.
As an implementation manner, on the basis of performing parameter adjustment on the sending end device and the receiving end device, the modulation/demodulation circuit of the receiving end device may be further improved. Those skilled in the art can understand that, by applying the parameter adjustment scheme provided in the embodiment of the present invention, a difference between a high-frequency peak parameter and a low-frequency peak parameter of a second signal received by receiving end equipment may be large, so that more noise exists between the high-frequency peak parameter and the low-frequency peak parameter. Therefore, the band elimination filter circuit can be added on the basis of the existing modulation/demodulation circuit of the receiving end equipment, so that the noise can be weakened, and the equipment sensitivity can be improved.
In this embodiment, after receiving the second signal, the second signal is filtered by the band-stop filter circuit; and demodulating the second signal after the secondary filtering.
In addition, the receiving end equipment also comprises a band-pass filter circuit, and when the receiving parameters are adjusted, the receiving parameters are adjusted through the band-pass filter circuit.
Those skilled in the art can understand that, besides band-pass filtering and band-stop filtering, differentiation, rectification and other processing can be performed on the second signal, which is the same as the existing scheme and is not described in detail.
With the embodiment of the present invention shown in fig. 5, the sending parameter of the second signal (2FSK signal) sent by the sending end device and the receiving parameter of the second signal received by the receiving end device are adjusted, so that the receiving end device can receive the second signal; in addition, the parameters of the first signal (OOK signal) sent by the sending end device and the parameters of the first signal received by the receiving end device are not changed, and the receiving end device can still receive the first signal. Therefore, by applying the scheme, the receiving end equipment can receive the first signal and the second signal, and compatibility is realized; and only parameters are adjusted, two functional modules are not required to be arranged, and equipment cost is not increased.
For example, the communication system may include a master and a plurality of slaves as shown in fig. 6. In the system shown in fig. 5, there are two embodiments, the first embodiment is that both the master and the slave can receive and transmit signals, and the second embodiment is that the master receives signals and the slave transmits signals.
In the first implementation manner, both the master and the slave may apply the embodiments shown in fig. 1 and fig. 5 of the present invention, and may send and receive an OOK signal, or may send and receive a 2FSK signal, or may mark a device communicating with itself as a frequency modulation device or an amplitude modulation device, and communicate with the frequency modulation device in a frequency modulation mode, and communicate with the amplitude modulation device in an amplitude modulation mode.
In a second implementation manner, the host may be used as a receiving end device to which the embodiment shown in fig. 5 of the present invention is applied, and may receive an OOK signal or a 2FSK signal; the slave machine can use the embodiments shown in fig. 1 and fig. 5 of the present invention, and can send and receive OOK signals, and also can send and receive 2FSK signals, and also can mark the device communicating with itself as frequency modulation device or amplitude modulation device, and communicate with the frequency modulation device by using frequency modulation mode, and communicate with the amplitude modulation device by using amplitude modulation mode.
Corresponding to the method embodiment, the embodiment of the invention also provides a modulation signal compatible device.
Fig. 7 is a schematic structural diagram of a modulation signal compatible apparatus applied to a sending end device according to an embodiment of the present invention, where the modulation signal compatible apparatus includes:
a first sending module 701, configured to send a second signal using the adjusted sending parameter, so that a receiving end device receives the second signal according to the adjusted receiving parameter; the second signal is a signal modulated by a frequency modulation mode; adjusting the receiving parameters according to the adjusted sending parameters;
wherein the sending parameters include a high frequency peak parameter and a low frequency peak parameter of the second signal, the apparatus further includes a first adjusting module 702 configured to adjust the sending parameters;
the first adjusting module 702 may include:
a first determining submodule 7021, configured to determine a frequency of a first signal sent by the sending end device, where the first signal is a signal modulated in an amplitude modulation manner;
a first adjusting submodule 7022, configured to adjust the high-frequency peak parameter to match the frequency;
a second adjusting submodule 7023, configured to adjust the low-frequency peak parameter according to a first receiving bandwidth of the receiving end device, where the first receiving bandwidth is a bandwidth of the receiving end device receiving the first signal.
In one embodiment, the transmission parameter further includes a frequency difference parameter of the second signal; the first adjusting module 702 may further include:
a third adjusting sub-module (not shown in the figure) for adjusting the frequency difference parameter to: half of the sum of the high-frequency peak parameter and the low-frequency peak parameter;
the second adjusting submodule 7023 may be specifically configured to:
adjusting the low-frequency peak parameter to: more than or equal to half of the first receiving bandwidth.
As an embodiment, the sending end device includes a frequency modulation mode and an amplitude modulation mode, and the sending end device communicates with the frequency modulation device by using the frequency modulation mode and communicates with the amplitude modulation device by using the amplitude modulation mode;
the apparatus may further include: a second sending module, a first detecting module, a first marking module and a second marking module (not shown in the figure), wherein,
the second sending module is used for sending a handshake signal to the receiving end equipment in a frequency modulation mode;
the first detection module is used for detecting whether a frequency modulation response signal sent by the receiving end equipment is received within a first preset time; if yes, triggering a first marking module, and if not, triggering a second marking module;
the first marking module is used for marking the receiving end equipment as frequency modulation equipment;
and the second marking module is used for marking the receiving end equipment as amplitude modulation equipment.
As an embodiment, the apparatus may further include: a third sending module and a second detecting module (not shown in the figure), wherein,
a third sending module, configured to send a handshake signal to the receiving end device in an amplitude modulation mode when the first detecting module detects that the response signal sent by the receiving end device is not received within a first preset time period;
the second detection module is used for detecting whether an amplitude modulation response signal sent by the receiving end equipment is received within a second preset time length or not; and if so, triggering the second marking module.
As an embodiment, the apparatus may further include:
and a deleting module (not shown in the figure) for deleting the self amplitude modulation mode under the condition that all the receiving end devices are marked as frequency modulation devices.
With the embodiment of the present invention shown in fig. 7, the sending parameter of the second signal (2FSK signal) sent by the sending end device and the receiving parameter of the second signal received by the receiving end device are adjusted, so that the receiving end device can receive the second signal; in addition, the parameters of the first signal (OOK signal) sent by the sending end device and the parameters of the first signal received by the receiving end device are not changed, and the receiving end device can still receive the first signal. Therefore, by applying the scheme, the receiving end equipment can receive the first signal and the second signal, and compatibility is realized; and only parameters are adjusted, two functional modules are not required to be arranged, and equipment cost is not increased.
Fig. 8 is a schematic structural diagram of a modulation signal compatible apparatus applied to a receiving end device according to an embodiment of the present invention, including:
a receiving module 801, configured to receive, by using the adjusted receiving parameter, a second signal sent by the sending end device; the second signal is a signal modulated by a frequency modulation mode; the second signal is sent by the sending end equipment by using the adjusted sending parameter;
the receiving parameter includes a second receiving bandwidth, where the second receiving bandwidth is a bandwidth of the receiving end device receiving the second signal; the apparatus further comprises a second adjusting module 802 for adjusting the receiving parameter;
the second adjusting module 802 is specifically configured to:
determining the adjusted transmission parameters;
and adjusting the second receiving bandwidth according to the adjusted sending parameters.
As an embodiment, the second adjusting module 802 may include: a second determination sub-module and a fourth adjustment sub-module (not shown), wherein,
the second determining submodule is used for determining the speed of the first signal sent by the sending end equipment and the high-frequency wave crest parameter and the low-frequency wave crest parameter of the second signal sent by the sending end equipment; the first signal is a signal modulated by an amplitude modulation mode;
and the fourth adjusting submodule is used for adjusting the second receiving bandwidth according to the speed of the first signal, the high-frequency wave peak parameter and the low-frequency wave peak parameter.
As an embodiment, the fourth adjusting submodule may be specifically configured to:
adjusting the second receive bandwidth to: the rate of the first signal is more than or equal to +2 frequency difference parameters +4 crystal oscillator frequency deviation; the frequency difference parameters are as follows: half of the sum of the high frequency peak parameter and the low frequency peak parameter.
As an embodiment, the receiving end device includes a band-pass filter circuit and a band-stop filter circuit; the second adjusting module may specifically be configured to:
determining the adjusted transmission parameters;
adjusting the second receiving bandwidth through the band-pass filter circuit according to the adjusted sending parameter;
the apparatus may further include: a filtering module and a processing module (not shown), wherein,
the filtering module is used for filtering the received second signal through the band-elimination filtering circuit;
and the processing module is used for demodulating the filtered second signal.
With the embodiment of the present invention shown in fig. 8, the sending parameter of the second signal (2FSK signal) sent by the sending end device and the receiving parameter of the second signal received by the receiving end device are adjusted, so that the receiving end device can receive the second signal; in addition, the parameters of the first signal (OOK signal) sent by the sending end device and the parameters of the first signal received by the receiving end device are not changed, and the receiving end device can still receive the first signal. Therefore, by applying the scheme, the receiving end equipment can receive the first signal and the second signal, and compatibility is realized; and only parameters are adjusted, two functional modules are not required to be arranged, and equipment cost is not increased.
An embodiment of the present invention further provides a communication system, including: a sending terminal device and a receiving terminal device;
the sending end equipment is used for sending a second signal by using the adjusted sending parameters; the second signal is a signal modulated by a frequency modulation mode; the sending parameters comprise a high-frequency peak parameter and a low-frequency peak parameter of the second signal;
the sending end device is further configured to adjust the sending parameter, and the adjusting process includes:
determining the frequency of a first signal sent by the sending end equipment, wherein the first signal is a signal modulated by an amplitude modulation mode; adjusting the high-frequency peak parameter to match the frequency; adjusting the low-frequency peak parameter according to a first receiving bandwidth of the receiving end device, wherein the first receiving bandwidth is a bandwidth of the receiving end device for receiving the first signal;
the receiving end device is configured to receive the second signal sent by the sending end device by using the adjusted receiving parameter; the receiving parameter comprises a second receiving bandwidth, and the second receiving bandwidth is a bandwidth of the receiving end device for receiving the second signal;
the receiving end device is further configured to adjust the receiving parameter, and the adjusting process includes:
determining the adjusted transmission parameters; and adjusting the second receiving bandwidth according to the adjusted sending parameters.
In one embodiment, the transmission parameter further includes a frequency difference parameter of the second signal; the sending end device may be further configured to adjust the frequency difference parameter to: half of the sum of the high-frequency peak parameter and the low-frequency peak parameter; adjusting the low-frequency peak parameter to: more than or equal to half of the first receiving bandwidth.
As an embodiment, the sending end device may include a frequency modulation mode and an amplitude modulation mode, and the sending end device communicates with the frequency modulation device using the frequency modulation mode and communicates with the amplitude modulation device using the amplitude modulation mode; the sending end device may be further configured to:
transmitting a handshake signal to receiving end equipment in a frequency modulation mode;
detecting whether a frequency modulation response signal sent by the receiving end equipment is received within a first preset time;
if yes, marking the receiving end equipment as frequency modulation equipment;
if not, marking the receiving end equipment as amplitude modulation equipment.
As an implementation manner, the sending end device may further be configured to:
before the receiving end equipment is marked as amplitude modulation equipment, sending a handshake signal to the receiving end equipment in an amplitude modulation mode;
detecting whether an amplitude modulation response signal sent by the receiving end equipment is received within a second preset time length or not;
if yes, the receiving end equipment is marked as amplitude modulation equipment.
As an implementation manner, the sending end device may further be configured to:
and deleting the self amplitude modulation mode under the condition that all receiving end equipment is marked as frequency modulation equipment.
As an embodiment, the receiving end device may further be configured to:
determining the rate of a first signal sent by the sending end equipment, and the high-frequency peak parameter and the low-frequency peak parameter of a second signal sent by the sending end equipment; the first signal is a signal modulated by an amplitude modulation mode; and adjusting the second receiving bandwidth according to the speed of the first signal, the high-frequency peak parameter and the low-frequency peak parameter.
As an embodiment, the receiving end device may further be configured to:
adjusting the second receive bandwidth to: the rate of the first signal is more than or equal to +2 frequency difference parameters +4 crystal oscillator frequency deviation; the frequency difference parameters are as follows: half of the sum of the high frequency peak parameter and the low frequency peak parameter.
As an embodiment, the receiving end device includes a band-pass filter circuit and a band-stop filter circuit; the receiving end device may further be configured to:
adjusting, by the band pass filter circuit, the second receive bandwidth;
filtering, by the band-stop filter circuit, the received second signal;
and demodulating the filtered second signal.
By applying the embodiment of the invention, the sending parameters of the second signal (2FSK signal) sent by the sending terminal equipment and the receiving parameters of the second signal received by the receiving terminal equipment are adjusted, so that the receiving terminal equipment can receive the second signal; in addition, the parameters of the first signal (OOK signal) sent by the sending end device and the parameters of the first signal received by the receiving end device are not changed, and the receiving end device can still receive the first signal. Therefore, by applying the scheme, the receiving end equipment can receive the first signal and the second signal, and compatibility is realized; and only parameters are adjusted, two functional modules are not required to be arranged, and equipment cost is not increased.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (14)
1. A method for compatible modulation signals, which is applied to a transmitting end device, the method comprising:
sending a second signal by using the adjusted sending parameter, so that the receiving end equipment receives the second signal according to the adjusted receiving parameter; the second signal is a signal modulated by a frequency modulation mode; adjusting the receiving parameters according to the adjusted sending parameters;
wherein the transmission parameter includes a high frequency peak parameter and a low frequency peak parameter of the second signal, and the process of adjusting the transmission parameter includes:
determining the frequency of a first signal sent by the sending end equipment, wherein the first signal is a signal modulated by an amplitude modulation mode;
adjusting the high-frequency peak parameter to match the frequency;
adjusting the low-frequency peak parameter according to a first receiving bandwidth of the receiving end device, wherein the first receiving bandwidth is a bandwidth of the receiving end device for receiving the first signal;
wherein, the step of adjusting the low frequency peak parameter according to the first receiving bandwidth of the receiving end device includes:
adjusting the low-frequency peak parameter to: more than or equal to half of the first receiving bandwidth.
2. The method of claim 1, wherein the transmission parameters further comprise a frequency difference parameter of the second signal; the process of adjusting the transmission parameters further comprises:
adjusting the frequency difference parameter as: half of the sum of the high frequency peak parameter and the low frequency peak parameter.
3. The method of claim 1, wherein the sending end device comprises a frequency modulation mode and an amplitude modulation mode, and wherein the sending end device communicates with the frequency modulation device using the frequency modulation mode and communicates with the amplitude modulation device using the amplitude modulation mode;
the method further comprises the following steps:
transmitting a handshake signal to receiving end equipment in a frequency modulation mode;
detecting whether a frequency modulation response signal sent by the receiving end equipment is received within a first preset time;
if yes, marking the receiving end equipment as frequency modulation equipment;
if not, marking the receiving end equipment as amplitude modulation equipment.
4. The method of claim 3, further comprising, before the step of marking the receiving device as an amplitude modulation device:
sending a handshake signal to the receiving end equipment in an amplitude modulation mode;
detecting whether an amplitude modulation response signal sent by the receiving end equipment is received within a second preset time length or not;
if yes, the step of marking the receiving end equipment as amplitude modulation equipment is executed.
5. The method of claim 4, further comprising:
and deleting the self amplitude modulation mode under the condition that all receiving end equipment is marked as frequency modulation equipment.
6. A modulation signal compatible method is applied to a receiving end device, and the method comprises the following steps:
receiving a second signal sent by the sending terminal equipment by using the adjusted receiving parameter; the second signal is a signal modulated by a frequency modulation mode; the second signal is sent by the sending end equipment by using the adjusted sending parameter;
the receiving parameter includes a second receiving bandwidth, where the second receiving bandwidth is a bandwidth of the receiving end device receiving the second signal; the process of adjusting the receiving parameters comprises:
determining the adjusted transmission parameters;
adjusting the second receiving bandwidth according to the adjusted sending parameter;
wherein the step of determining the adjusted transmission parameter comprises:
determining the rate of a first signal sent by the sending end equipment, and the high-frequency peak parameter and the low-frequency peak parameter of a second signal sent by the sending end equipment; the first signal is a signal modulated by an amplitude modulation mode;
the step of adjusting the receiving bandwidth according to the adjusted sending parameter includes:
adjusting the second receive bandwidth to: the rate of the first signal is more than or equal to +2 frequency difference parameters +4 crystal oscillator frequency deviation; the frequency difference parameters are as follows: half of the sum of the high frequency peak parameter and the low frequency peak parameter.
7. The method of claim 6, wherein the receiving end device comprises a band-pass filter circuit and a band-stop filter circuit; the step of adjusting the second receiving bandwidth includes:
adjusting, by the band pass filter circuit, the second receive bandwidth;
the method further comprises the following steps:
filtering, by the band-stop filter circuit, the received second signal;
and demodulating the filtered second signal.
8. A modulation signal compatible apparatus, applied to a transmitting end device, the apparatus comprising:
the first sending module is used for sending a second signal by using the adjusted sending parameter so that the receiving end equipment receives the second signal according to the adjusted receiving parameter; the second signal is a signal modulated by a frequency modulation mode; adjusting the receiving parameters according to the adjusted sending parameters;
the device comprises a first sending module, a second sending module and a control module, wherein the sending parameters comprise high-frequency peak parameters and low-frequency peak parameters of a second signal, and the first adjusting module is used for adjusting the sending parameters;
the first adjustment module includes:
the first determining submodule is used for determining the frequency of a first signal sent by the sending end equipment, wherein the first signal is a signal modulated by an amplitude modulation mode;
a first adjusting submodule, configured to adjust the high-frequency peak parameter to match the frequency;
the second adjusting submodule is used for adjusting the low-frequency peak parameter according to a first receiving bandwidth of the receiving end equipment, wherein the first receiving bandwidth is a bandwidth of the receiving end equipment for receiving the first signal;
the second adjusting submodule is specifically configured to:
adjusting the low-frequency peak parameter to: more than or equal to half of the first receiving bandwidth.
9. The apparatus of claim 8, wherein the transmission parameters further comprise a frequency difference parameter of the second signal; the first adjusting module further comprises:
a third adjusting sub-module, configured to adjust the frequency difference parameter to: half of the sum of the high frequency peak parameter and the low frequency peak parameter.
10. The apparatus of claim 8, wherein the sending end device comprises a frequency modulation mode and an amplitude modulation mode, and wherein the sending end device communicates with the frequency modulation device using the frequency modulation mode and communicates with the amplitude modulation device using the amplitude modulation mode;
the device further comprises:
the second sending module is used for sending a handshake signal to the receiving end equipment in a frequency modulation mode;
the first detection module is used for detecting whether a frequency modulation response signal sent by the receiving end equipment is received within a first preset time; if yes, triggering a first marking module, and if not, triggering a third sending module;
the first marking module is used for marking the receiving end equipment as frequency modulation equipment;
the third sending module is used for sending a handshake signal to the receiving end equipment in an amplitude modulation mode;
the second detection module is used for detecting whether an amplitude modulation response signal sent by the receiving end equipment is received within a second preset time length or not; if yes, triggering a second marking module;
and the second marking module is used for marking the receiving end equipment as amplitude modulation equipment.
11. The apparatus of claim 10, further comprising:
and the deleting module is used for deleting the self amplitude modulation mode under the condition that all the receiving end equipment is marked as frequency modulation equipment.
12. A modulation signal compatible apparatus, applied to a receiving end device, the apparatus comprising:
the receiving module is used for receiving a second signal sent by the sending terminal equipment by using the adjusted receiving parameter; the second signal is a signal modulated by a frequency modulation mode; the second signal is sent by the sending end equipment by using the adjusted sending parameter;
the receiving parameter includes a second receiving bandwidth, where the second receiving bandwidth is a bandwidth of the receiving end device receiving the second signal; the device also comprises a second adjusting module used for adjusting the receiving parameters;
the second adjusting module is specifically configured to:
determining the adjusted transmission parameters;
adjusting the second receiving bandwidth according to the adjusted sending parameter;
wherein the second adjusting module comprises:
the second determining submodule is used for determining the speed of the first signal sent by the sending end equipment and the high-frequency wave crest parameter and the low-frequency wave crest parameter of the second signal sent by the sending end equipment; the first signal is a signal modulated by an amplitude modulation mode;
a fourth adjusting submodule, configured to adjust the second receiving bandwidth to: the rate of the first signal is more than or equal to +2 frequency difference parameters +4 crystal oscillator frequency deviation; the frequency difference parameters are as follows: half of the sum of the high frequency peak parameter and the low frequency peak parameter.
13. The apparatus of claim 12, wherein the receiving end device comprises a band-pass filter circuit and a band-stop filter circuit; the second adjusting module is specifically configured to:
determining the adjusted transmission parameters;
adjusting the second receiving bandwidth through the band-pass filter circuit according to the adjusted sending parameter;
the device further comprises:
the filtering module is used for filtering the received second signal through the band-elimination filtering circuit;
and the processing module is used for demodulating the filtered second signal.
14. A communication system, comprising: a sending terminal device and a receiving terminal device; wherein the content of the first and second substances,
the sending end equipment is used for sending a second signal by using the adjusted sending parameters; the second signal is a signal modulated by a frequency modulation mode; the sending parameters comprise a high-frequency peak parameter and a low-frequency peak parameter of the second signal;
the sending end device is further configured to adjust the sending parameter, and the adjusting process includes:
determining the frequency of a first signal sent by the sending end equipment, wherein the first signal is a signal modulated by an amplitude modulation mode; adjusting the high-frequency peak parameter to match the frequency; adjusting the low-frequency peak parameter according to a first receiving bandwidth of the receiving end device, wherein the first receiving bandwidth is a bandwidth of the receiving end device for receiving the first signal;
the receiving end device is configured to receive the second signal sent by the sending end device by using the adjusted receiving parameter; the receiving parameter comprises a second receiving bandwidth, and the second receiving bandwidth is a bandwidth of the receiving end device for receiving the second signal;
the receiving end device is further configured to adjust the receiving parameter, and the adjusting process includes:
determining the adjusted transmission parameters; adjusting the second receiving bandwidth according to the adjusted sending parameter;
wherein, the step of adjusting the low frequency peak parameter according to the first receiving bandwidth of the receiving end device includes:
adjusting the low-frequency peak parameter to: more than or equal to half of the first receiving bandwidth;
the step of determining the adjusted transmission parameter includes:
determining the rate of a first signal sent by the sending end equipment, and the high-frequency peak parameter and the low-frequency peak parameter of a second signal sent by the sending end equipment; the first signal is a signal modulated by an amplitude modulation mode;
the step of adjusting the receiving bandwidth according to the adjusted sending parameter includes:
adjusting the second receive bandwidth to: the rate of the first signal is more than or equal to +2 frequency difference parameters +4 crystal oscillator frequency deviation; the frequency difference parameters are as follows: half of the sum of the high frequency peak parameter and the low frequency peak parameter.
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| CN1761249A (en) * | 2004-10-15 | 2006-04-19 | 因芬尼昂技术股份公司 | Modulator having controllable transmission bandwidth and related method for controlling transmission bandwidth |
| CN102983871A (en) * | 2012-09-27 | 2013-03-20 | 曾德平 | Receiver for receiving very high frequency aviation wave bands |
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| US9048784B2 (en) * | 2007-04-03 | 2015-06-02 | General Motors Llc | Method for data communication via a voice channel of a wireless communication network using continuous signal modulation |
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| CN1066351A (en) * | 1992-03-28 | 1992-11-18 | 李铁铮 | Power line frequency-amplitude cable station |
| CN1761249A (en) * | 2004-10-15 | 2006-04-19 | 因芬尼昂技术股份公司 | Modulator having controllable transmission bandwidth and related method for controlling transmission bandwidth |
| CN102983871A (en) * | 2012-09-27 | 2013-03-20 | 曾德平 | Receiver for receiving very high frequency aviation wave bands |
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