CN114944846B - Radio frequency receiving and transmitting device and method and electronic equipment - Google Patents
Radio frequency receiving and transmitting device and method and electronic equipment Download PDFInfo
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- CN114944846B CN114944846B CN202110183817.7A CN202110183817A CN114944846B CN 114944846 B CN114944846 B CN 114944846B CN 202110183817 A CN202110183817 A CN 202110183817A CN 114944846 B CN114944846 B CN 114944846B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
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Abstract
The application provides a radio frequency transceiver, comprising: the switching module, the receiving path and the transmitting path; the switching module is respectively connected with the antenna, the receiving channel and the transmitting channel; wherein the receive path comprises: the device comprises a first filter and a processing module, wherein the first filter is used for filtering interference on a first signal received by an antenna to obtain a second signal, and the processing module is used for carrying out preset processing on the second signal to obtain an output signal; the transmitting path is used for transmitting a signal to be transmitted generated by the signal source to the antenna; the second end of the switching module is also connected with the processing module, and the strength of the first signal is adjusted to meet the preset strength based on the signal feedback output by the processing module. In the scheme, the first signal intensity input to the receiving channel is adjusted based on the signal feedback output by the processing module, a specific attenuation function module RF AGC is not required to be specially set, and the structure of the receiving channel is simpler.
Description
Technical Field
The present application relates to the field of communications, and in particular, to a radio frequency transceiver device, a radio frequency transceiver method, and an electronic device.
Background
In a time division duplex system, a strong interference signal causes a radio frequency front end receiving link to generate serious nonlinear distortion, gain reduction and noise coefficient to be obviously increased, so that the receiving signal to noise ratio is reduced, the communication quality of the system is deteriorated, even communication is interrupted, and normal use of a user is seriously affected.
The existing time division duplex system is shown in fig. 1, and includes an antenna, a low pass filter LPF, a switch TRX switch, a receive path 101, and a transmit path 102, where the receive path includes: the gain module RF AGC (Radio Frequency Automatic Gain Control ), electrically Tunable band pass filter tuneable BPF and other functional units 106, the transmit path comprises a signal source TX Link. The gain module is used for executing signal attenuation, detection and signal coupling functions, the electrically Tunable band-pass filter Tuable BPF is used for carrying out band-pass filtering, the other functional units are used for carrying out low-noise amplification, filter amplification, baseband demodulation and other processing on the filtered signals, the demodulated signals are output, and the demodulated signals are output to corresponding functional structures in the equipment so as to respond to the signals.
The gain module RF AGC in the receiving path of the time division duplex system consists of a radio frequency detector Delector, a digital control attenuator and ADC (Analog-to-Digital Converter), a DSP (Digital Signal Processing, a digital signal processing unit) and an adjustable resistor, and has a complex structure.
Disclosure of Invention
In view of this, the present application provides a radio frequency transceiver device, which solves the problem of complex structure of the time division duplex system in the prior art.
In order to achieve the above purpose, the present application provides the following technical solutions:
a radio frequency transceiver device comprising: the switching module, the receiving path and the transmitting path;
the first end of the switching module is connected with the antenna, the second end of the switching module is connected with the receiving channel through the signal attenuation unit, and the third end of the switching module is connected with the transmitting channel;
wherein the receive path comprises: the device comprises a first filter and a processing module, wherein the first filter is used for filtering interference on a first signal received by an antenna to obtain a second signal, and the processing module is used for carrying out preset processing on the second signal to obtain an output signal;
the transmitting path is used for transmitting a signal to be transmitted generated by the signal source to the antenna;
the second end of the switching module is also connected with the processing module, and the strength of the first signal is adjusted to meet the preset strength based on the signal feedback output by the processing module.
A radio frequency transceiving method applied to the radio frequency transceiving device described above, the method comprising:
when the radio frequency receiving and transmitting device is in a transmitting time slot, the switching module is connected with an antenna and a transmitting passage, and a signal to be transmitted of the transmitting passage is transmitted through the antenna;
when the radio frequency receiving and transmitting device is in a receiving time slot, the switching module is connected with the antenna and the receiving passage, and the first signal received by the antenna is processed by the receiving passage to obtain an output signal;
the switching module adjusts the intensity of the first signal based on the output signal feedback until the preset intensity is met.
An electronic device, comprising: an antenna and a radio frequency transceiver as described above.
As can be seen from the above technical solution, compared with the prior art, the present application provides a radio frequency transceiver, including: the switching module, the receiving path and the transmitting path; the first end of the switching module is connected with the antenna, the second end of the switching module is connected with the receiving channel through the signal attenuation unit, and the third end of the switching module is connected with the transmitting channel; wherein the receive path comprises: the device comprises a first filter and a processing module, wherein the first filter is used for filtering interference on a first signal received by an antenna to obtain a second signal, and the processing module is used for carrying out preset processing on the second signal to obtain an output signal; the transmitting path is used for transmitting a signal to be transmitted generated by the signal source to the antenna; the second end of the switching module is also connected with the processing module, and the strength of the first signal is adjusted to meet the preset strength based on the signal feedback output by the processing module. In the scheme, the first signal intensity input to the receiving channel is adjusted based on the signal feedback output by the processing module, a specific attenuation function module RF AGC is not required to be specially set, and the structure of the receiving channel is simpler.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a prior art time division duplex system;
fig. 2 is a schematic structural diagram of an embodiment 1 of a radio frequency transceiver device provided by the present application;
fig. 3 is a schematic structural diagram of an embodiment 2 of a radio frequency transceiver device provided by the present application;
fig. 4 is a schematic structural diagram of an embodiment 3 of a radio frequency transceiver device provided by the present application;
fig. 5 is a schematic structural diagram of an embodiment 4 of a radio frequency transceiver provided by the present application;
fig. 6 is a flowchart of an embodiment 1 of a radio frequency transceiving method according to the present application;
FIG. 7 is a schematic diagram of an embodiment of an electronic device according to the present application;
fig. 8 is a block diagram of a radio frequency transceiver in a signal transceiver according to the present application;
fig. 9 is a schematic diagram of a radio frequency transceiver device in a signal transceiver according to the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
As shown in fig. 2, a schematic structural diagram of an embodiment 1 of a radio frequency transceiver device provided by the present application includes the following structures: a switching module 201, a receiving path 202, and a transmitting path 203;
in a specific implementation, the radio frequency transceiver device is specifically used as a component part of a signal transceiver device adopting a time division duplex system, and is arranged between an antenna and an internal structure of the device, wherein the internal structure comprises a signal source and a structure responding to an output signal.
Wherein, a first end of the switching module 201 is connected with the antenna 204, a second end RX of the switching module 201 is connected with the receiving path 202, and a third end TX of the switching module 201 is connected with the transmitting path 203;
wherein the receiving path 202 comprises: a first filter 2021 and a processing module 2022, where the first filter is configured to filter interference from a first signal received by an antenna to obtain a second signal, and the processing module is configured to perform a preset process on the second signal to obtain an output signal;
the transmitting path 203 is configured to send a signal to be transmitted generated by the signal source 205 to the antenna 204;
the second end of the switching module 201 is further connected to the processing module 2022, and adjusts the intensity of the first signal to meet a preset intensity based on the signal feedback output by the processing module.
In particular embodiments, the receive path is a radio frequency front end receive link in a time division duplex system.
Specifically, when a time slot is transmitted, the switching module is switched to the TX end, and a signal reaches an antenna from a transmitting path through the TX end of the switch and is transmitted; when receiving time slot, the switching module switches to RX end, the signal is received from antenna, and reaches the receiving path through switch RX end, then carries out receiving demodulation process.
Specifically, the first filter adopts a fixed band-pass filter, and the function of the fixed band-pass filter is to filter the received first signal and filter out-of-band interference signals.
The first signal intensity input to the receiving channel is adjusted through feedback, so that the signal intensity input to the subsequent first filter and other structures meets the preset intensity condition.
Compared with the adjustable attenuator used in the prior art, the adjustable attenuator is replaced by a fixed band-pass filter, a varactor is omitted, the Q value of a circuit is improved, and the noise coefficient of a receiving system is reduced.
In summary, the present embodiment provides a radio frequency transceiver, including: the switching module, the receiving path and the transmitting path; the first end of the switching module is connected with the antenna, the second end of the switching module is connected with the receiving channel, and the third end of the switching module is connected with the transmitting channel; wherein the receive path comprises: the device comprises a first filter and a processing module, wherein the first filter is used for filtering interference on a first signal received by an antenna to obtain a second signal, and the processing module is used for carrying out preset processing on the second signal to obtain an output signal; the transmitting path is used for transmitting a signal to be transmitted generated by the signal source to the antenna; the second end of the switching module is also connected with the processing module, and the strength of the first signal is adjusted to meet the preset strength based on the signal feedback output by the processing module. In the scheme, the first signal intensity input to the receiving channel is adjusted based on the signal feedback output by the processing module, a specific attenuation function module RF AGC is not required to be specially set, and the structure of the receiving channel is simpler.
As shown in fig. 3, a schematic structural diagram of an embodiment 2 of a radio frequency transceiver device provided by the present application includes the following structures: a switching module 301, a receive path 302 and a transmit path 303;
the structure functions of the switching module 301 and the receiving channel 302 are identical to the corresponding structure functions in embodiment 1, and are not described in detail in this embodiment.
Wherein the transmit path comprises: a low pass filter 3031;
the low-pass filter is disposed between the signal source 304 and the switching module, and is configured to filter low-frequency band interference from a signal output by the signal source.
In the prior art, the low-pass filter is arranged in the transmit path in the superheterodyne transceiver structure, and the low-pass filter is arranged in the transmit path in the superheterodyne transceiver structure, so that the interference filtering processing can be performed on the received signal based on the filter arranged in the receive path, the influence of the transmit system on the receive system is reduced, and the noise coefficient of the receive system is reduced.
In summary, the present embodiment provides a radio frequency transceiver, in which a low-pass filter is included in a transmitting path, so as to filter out interference from a signal output by a signal source, thereby reducing noise coefficient of a receiving system.
As shown in fig. 4, a schematic structural diagram of an embodiment 3 of a radio frequency transceiver device provided by the present application includes the following structures: a switching module 401, a receive path 402, and a transmit path 403;
the structural functions of the receiving channel 402 and the transmitting channel 403 are identical to the corresponding structural functions in embodiment 1, and are not described in detail in this embodiment.
The switching module includes a first terminal, an RX terminal, a TX terminal, and a signal attenuation unit 4011.
A first end of the switching module is connected with an antenna 404, an RX end is connected with a receiving channel 402, a TX end is connected with a transmitting channel 403, and a signal attenuation unit 4011 is arranged between the first end and the RX end;
in fig. 4, two different dashed lines are used to represent different transmission slots, and the connection mode of the switching module is adopted.
Specifically, when a time slot is transmitted, a signal to be transmitted reaches an antenna from a transmitting channel through a switch TX end and is transmitted, and at the moment, a first route between a first end and the TX end is conducted; when the time slot is received, the first signal is received from the antenna, passes through the signal attenuation unit and reaches the receiving path through the RX end, and then the receiving demodulation process is performed, at this time, the second route between the first end and the RX end is conducted.
The signal attenuation unit 4011 is configured to perform attenuation processing on a first signal received through an antenna, and a voltage value applied to the signal attenuation unit is positively correlated with attenuation capability;
the processing module of the receiving path determines a target voltage value based on the intensity of the output signal and applies the target voltage value to the signal attenuation unit.
In this embodiment, the attenuation capability of the signal attenuation unit is positively correlated with the voltage value applied thereto, i.e., the larger the applied voltage value, the stronger the attenuation capability.
The processing module can analyze the intensity of the output signal, determine the corresponding voltage value based on the intensity of the output signal, and apply the voltage value to the signal attenuation unit so as to adjust the attenuation capability of the signal attenuation unit, and the signal attenuation unit carries out attenuation processing on the continuously input first signal, so that the intensity of the first signal entering the receiving channel meets the preset intensity requirement, the strong interference signal cannot cause the saturation state of the radio frequency front end link, and the blocking problem caused by the radio frequency front end saturation is eliminated.
It should be noted that, the switching module in fig. 4 can implement a switching function (the first end is connected to the RX end or the TX end), and also can implement a function of performing attenuation processing on the received first signal, and both functions relate to the same structure, so the structure in fig. 4 is only used to illustrate that the switching module can implement the two functions, and is not a connection mode division for specific constituent elements of the switching module.
In a specific implementation, the connection between the first terminal and the RX terminal or the TX terminal is implemented by a PIN diode, and the signal attenuation unit may use the PIN diode and its functional circuit.
In this embodiment, the PIN diode multiplexing realizes the dual functions of the radio frequency attenuator and the radio frequency transceiver switch, and omits the numerical control attenuator, the radio frequency detector and the signal coupling circuit; therefore, the noise coefficient of the system is reduced by 1dB, the out-of-band strong interference resistance of the receiver is improved, and meanwhile, the cost is reduced.
Specifically, the PIN diode combines the RSSI values of the output signals to achieve different amounts of attenuation.
In specific implementation, the RSSI value of the output signal is smaller than a preset first threshold, which characterizes that the first signal received by the antenna is a small signal, the determined voltage value is 0, the PIN diode is not turned on, and the signal attenuation unit does not process; and the RSSI value is larger than a preset first threshold value, the first signal received by the antenna is characterized as a large signal, a corresponding voltage value is determined based on the RSSI value and is applied to a diode, so that the diode carries out corresponding attenuation. (principle of mediation)
It should be noted that, when a strong interference signal enters the time division duplex system through an antenna, the structure of the attenuation function module adopted in the prior art will cause serious nonlinear distortion, gain reduction and significant increase of noise coefficient of the radio frequency front end receiving link, resulting in degradation of the receiving signal to noise ratio and degradation of the communication quality of the system. The noise coefficient of the system is reduced by 1dB, the out-of-band strong interference resistance of the receiver is improved, and meanwhile, the cost is reduced.
In summary, the present embodiment provides a radio frequency transceiver, where the switching module includes a switching unit and a signal attenuation unit; the signal attenuation unit is used for carrying out attenuation processing on the first signal; the processing module is used for determining a target voltage value based on the intensity of an output signal and applying the target voltage value to the signal attenuation unit, wherein the voltage value applied to the signal attenuation unit is positively correlated with attenuation capacity. In the scheme, the signal attenuation unit is arranged between the switching unit and the receiving path, is used for changing the attenuation capacity based on the target voltage value fed back by the receiving path and carrying out attenuation processing on the received first signal based on the changed attenuation capacity, can be realized by adopting a diode structure, and realizes the radio frequency receiving and transmitting switch function by multiplexing the diode, and is simpler than the attenuation function module RF AGC structure in the prior art.
As shown in fig. 5, a schematic structural diagram of an embodiment 4 of a radio frequency transceiver device provided by the present application includes the following structures: a switching module 501, a receive path 502, and a transmit path 503;
the structure functions of the switching module 501 and the receiving channel 502 are identical to the corresponding structure functions in embodiment 3, and are not described in detail in this embodiment.
Wherein, the processing module includes: a low noise amplifier, a second filter, a first mixer, a filter amplifier, a second mixer, and a demodulation circuit;
and after the second signal is amplified by the low noise amplifier and filtered by the second filter, the first mixer and the first local oscillator signal are subjected to mixing processing to obtain a first mixed signal, the first mixed signal is filtered and amplified by the filter amplifier, the second mixer and the second local oscillator signal are subjected to mixing processing to obtain a second mixed signal, and the demodulation circuit demodulates the second mixed signal to obtain an output signal.
Wherein the digital to analog converter determines a corresponding target voltage value based on a signal strength indication, RSSI, value of the output signal.
In particular embodiments, the output signal is processed for output to a back-end DSP architecture.
Specifically, the demodulation Circuit (Baseband Circuit) further includes a digital-to-analog converter (DAC, digital to analog converter) that determines a corresponding target voltage value based on a signal strength indication, RSSI, of the output signal.
In specific implementation, the back-end DSP specifically detects the energy of the baseband IQ signal after receiving demodulation to calculate the RSSI value of the output signal, and the DSP outputs a numerical value to the DAC according to the range of the RSSI value. The DAC outputs an analog voltage value according to the received numerical value, the DAC output is connected with the signal attenuation unit, and the DAC outputs different voltage values to control the PIN diode to generate different attenuation amounts.
The DAC outputs a corresponding voltage value to the signal attenuation unit, so that the signal attenuation unit has a corresponding attenuation capacity, and the attenuation processing is performed on the first signal received by the antenna.
In summary, the present embodiment provides a radio frequency transceiver, where the processing module includes: a low noise amplifier, a second filter, a first mixer, a filter amplifier, a second mixer, and a demodulation circuit; the second signal is amplified by the low noise amplifier and filtered by the second filter, the first mixer and the first source signal are subjected to mixing processing to obtain a first mixed signal, the first mixed signal is filtered and amplified by the filter amplifier, the second mixer and the second source signal are subjected to mixing processing to obtain a second mixed signal, and the demodulation circuit demodulates the second mixed signal to obtain an output signal. The radio frequency transceiver of this scheme has only changed the switching module and has replaced the electrically tunable bandpass filter of receiving passageway for fixed bandpass filter for the structure among the prior art, carries out simple change to current structure, and the structure is simpler.
The application also provides an embodiment of the radio frequency receiving and transmitting method corresponding to the radio frequency receiving and transmitting device.
As shown in fig. 6, a flowchart of an embodiment 1 of a method for receiving and transmitting radio frequencies is provided, and the method is applied to a radio frequency receiving and transmitting device in the embodiment of the device, and includes the following steps:
step S601: when the radio frequency receiving and transmitting device is in a transmitting time slot, the switching module is connected with an antenna and a transmitting passage, and a signal to be transmitted of the transmitting passage is transmitted through the antenna;
the radio frequency transceiver is a component of a time division duplex system, and is divided into a receiving time slot and a transmitting time slot.
Specifically, when a time slot is transmitted, the switching module is connected with the antenna and the transmitting channel, and the signal to be transmitted of the transmitting channel is transmitted through the antenna.
And the low-pass filter arranged in the transmitting path performs interference filtering processing on the signal to be transmitted.
Step S602: when the radio frequency receiving and transmitting device is in a receiving time slot, the switching module is connected with the antenna and the receiving passage, and the first signal received by the antenna is processed by the receiving passage to obtain an output signal;
specifically, when receiving a time slot, the switching module connects the antenna and the receiving channel, and processes the first signal received from the antenna through the receiving channel to obtain an output signal for use by a subsequent structure.
Step S603: the switching module adjusts the intensity of the first signal based on the output signal feedback until the preset intensity is met.
The switching module adjusts the intensity of the first signal based on the output signal feedback, so that the intensity of the first signal meets the preset intensity, and the adjusted intensity of the first signal is more suitable for subsequent receiving channel processing.
Specifically, the strength of the output signal output by the receiving path is determined, if the strength of the output signal is greater than the preset strength, the first signal can be determined to be a large signal, the switching module carries out attenuation processing on the first signal so as to enable the first signal to meet the preset strength, and the attenuated signal is processed based on the composition structure in the receiving path, so that the problem that the receiving path is saturated due to the large signal, serious nonlinear distortion, gain reduction and obvious increase of noise coefficient, and the receiving demodulation capability is reduced is prevented.
Specifically, the step S603 includes:
obtaining an RSSI value of the output signal based on the analysis of the output signal;
and determining that the output signal meets a first intensity condition based on the RSSI value, generating a target voltage value corresponding to the output signal, and applying the target voltage value to the signal attenuation unit, wherein the voltage value applied to the signal attenuation unit is positively correlated with attenuation capability.
Specifically, the signal attenuation unit adopts a PIN diode.
Specifically, the range to which the RSSI value belongs is determined based on the RSSI value, and a corresponding target voltage value is determined based on the range to which the RSSI value belongs.
In specific implementation, according to different voltage values corresponding to different ranges of the RSSI values, the larger the RSSI finger is, the larger the corresponding voltage value is, and when the RSSI value belongs to a specific small value range, the corresponding voltage value can be taken as 0.
In specific implementation, the RSSI value of the output signal is smaller than a preset first threshold, which characterizes that the first signal received by the antenna is a small signal, the determined voltage value is 0, the PIN diode is not turned on, and the signal attenuation unit does not process; and the RSSI value is larger than a preset first threshold value, the first signal received by the antenna is characterized as a large signal, a corresponding voltage value is determined based on the RSSI value and is applied to the PIN diode, so that the PIN diode carries out corresponding attenuation.
In specific implementation, 4 preset thresholds may be set, and the RSSI value is compared with the 4 preset thresholds, so as to generate different voltage values, so that the PIN diode has different attenuation values.
It should be noted that the PIN attenuation values are not limited to 2 or 4, and the PIN attenuation values are related to the number of bits of the DAC.
In this embodiment, step S601 is described for the procedure of processing information by the information processing apparatus transmitting the time slot, steps S602-603 are described for the procedure of processing information by the information processing apparatus receiving the time slot, and the sequence of the steps is not limited to the description, and the steps are sequentially circulated.
In summary, the information processing method provided in this embodiment includes: when the radio frequency receiving and transmitting device is in a transmitting time slot, the switching module is connected with an antenna and a transmitting passage, and a signal to be transmitted of the transmitting passage is transmitted through the antenna; when the radio frequency receiving and transmitting device is in a receiving time slot, the switching module is connected with the antenna and the receiving passage, and the first signal received by the antenna is processed by the receiving passage to obtain an output signal; based on the output signal strength being greater than a preset strength, the switching module adjusts the strength of the first signal to meet the preset strength. In this scheme, based on the signal feedback adjustment input to this receiving path's of processing module output first signal strength, need not to set up special decay function module RF AGC specially, moreover, realize the structure of decay function can also multiplexing radio frequency transmit-receive switch, receiving path's structure is simpler.
Corresponding to the embodiment of the radio frequency receiving and transmitting method provided by the application, the application also provides an embodiment of the electronic equipment applying the radio frequency receiving and transmitting method.
Fig. 7 is a schematic structural diagram of an embodiment of an electronic device according to the present application, where the electronic device is applied to a signal transceiver device, and the electronic device includes the following structures: an antenna 701 and a radio frequency transceiver 702;
the antenna is used for receiving a signal sent by an external signal source in a receiving time slot and transmitting a signal to be transmitted generated by the electronic equipment in a sending time slot;
the structural function of the radio frequency transceiver refers to the corresponding embodiment, and the description of this embodiment is omitted.
Corresponding to the embodiment of the radio frequency transceiver provided by the application, the application also provides a use scene applying the radio frequency transceiver.
As shown in fig. 8, the following is a block diagram of a radio frequency transceiver in the signal transceiver in the usage scenario, where the radio frequency transceiver is connected to an antenna, and specifically, the radio frequency transceiver includes: switching module 801, receive path 802, and transmit path 803.
The Switch module 801 is shown as PIN Dovide trx_switch in fig. 8.
The transmit path 803 includes a low-pass filter LPF (Low Pass Filter), which performs a low-pass filtering process on the signal to be transmitted that is transmitted through the TX link.
The receiving path 802 includes a Fixed band-pass filter Fixed BPF1, a low noise amplifier LNA (Low Noise Amplifier), an adjustable filter tuneable BPF2, a Mixer1, an intermediate frequency Circuit (IF Circuit), a Mixer2, and a Baseband demodulation Circuit Baseband Circuit, which feeds back the RF AGC to the switching module to implement feedback adjustment for the signal received by the receiving path. The Mixer1 mixes the signal output by the adjustable filter with the signal LO1 of the first source, and the Mixer2 mixes the signal output by the intermediate frequency circuit with the signal LO2 of the second source.
The intermediate frequency circuit includes a Filter, an Amp (amplifier) and an AGC.
The baseband demodulation circuit outputs information including an I signal and a Q signal, detects the I signal and the Q signal, calculates an RSSI value, determines a voltage value corresponding to the RSSI value, and applies the voltage feedback to a PIN in a switching module, so that the PIN has corresponding attenuation capability based on the voltage value applied to the PIN, and the signal received by an antenna is attenuated and then sent to a Fixed BPF1 for processing.
As shown in fig. 9, the schematic diagram of the radio frequency transceiver in the signal transceiver includes an antenna ANT and its circuit structure, a switching module (PIN division trx_switch), a low-pass filter LPF of a transmitting circuit, a Fixed BPFI of a receiving path, and the following structures, wherein a TX end of the switching module is connected to the LPF, and the LPF is further connected to a tx_link, and the tx_link inputs a signal to be transmitted to the LPF. The RX end of the switching module is connected with the Fixed BPFI.
The switching module includes a U1034 and a combination Circuit thereof, and a PIN diode D1006 and a combination Circuit thereof, wherein a PIN rx_att of the U1034 is connected with an output end of a Baseband demodulation Circuit Baseband Circuit, the Baseband demodulation Circuit determines a voltage value according to an RSSI value of an output signal being in a range, and outputs a corresponding analog voltage value signal to the rx_att PIN, the rx_att PIN is connected with a PIN 3 of the U1034, and the U1034 applies a corresponding voltage value to the PIN diode D1006 based on the analog voltage value signal, so that the PIN diode D1006 realizes an attenuation function based on the voltage value, and a signal transmitted by a subsequent antenna can be attenuated based on the attenuation function.
The following table 1 shows the comparison results of the terminal using the information processing apparatus provided by the present application with the prior art.
TABLE 1
Wherein, attenuator represents the attenuation function structure, and Signal coupling represents the Signal coupling function structure.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. The device provided in the embodiment corresponds to the method provided in the embodiment, so that the description is simpler, and the relevant points refer to the description of the method.
The previous description of the provided embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features provided herein.
Claims (9)
1. A radio frequency transceiver device, comprising: the switching module, the receiving path and the transmitting path;
the first end of the switching module is connected with the antenna, the second end of the switching module is connected with the receiving channel, the third end of the switching module is connected with the transmitting channel, and a signal attenuation unit is arranged between the first end of the switching module and the second end of the switching module; the signal attenuation unit is used for carrying out attenuation processing on a first signal received through the antenna;
wherein the receive path comprises: the device comprises a first filter and a processing module, wherein the first filter is used for filtering interference on a first signal received by an antenna to obtain a second signal, and the processing module is used for carrying out preset processing on the second signal to obtain an output signal;
the transmitting path is used for transmitting a signal to be transmitted generated by the signal source to the antenna;
the second end of the switching module is further connected with the processing module, the strength of the first signal is adjusted to meet preset strength based on signal feedback output by the processing module, the processing module determines a target voltage value based on the strength of the output signal and applies the target voltage value to the signal attenuation unit, and the voltage value applied to the signal attenuation unit is positively correlated with attenuation capacity.
2. The apparatus of claim 1, wherein the transmit path comprises: a low pass filter;
the low-pass filter is arranged between the signal source and the switching module and is used for filtering and interfering signals output by the signal source.
3. The apparatus of claim 1, wherein the first filter is a fixed bandpass filter.
4. The apparatus of claim 1, wherein the signal attenuation unit employs a diode.
5. The apparatus of claim 1, wherein the processing module comprises: a low noise amplifier, a second filter, a first mixer, a filter amplifier, a second mixer, and a demodulation circuit;
and after the second signal is amplified by the low noise amplifier and filtered by the second filter, the first mixer and the first local oscillator signal are subjected to mixing processing to obtain a first mixed signal, the first mixed signal is filtered and amplified by the filter amplifier, the second mixer and the second local oscillator signal are subjected to mixing processing to obtain a second mixed signal, and the demodulation circuit demodulates the second mixed signal to obtain an output signal.
6. The apparatus of claim 5, wherein the demodulation circuit comprises a digital-to-analog converter that determines the corresponding target voltage value based on a signal strength indicator, RSSI, value of the output signal.
7. A radio frequency transceiving method, characterized in that it is applied to a radio frequency transceiving device according to any of claims 1 to 6, said method comprising:
when the radio frequency receiving and transmitting device is in a transmitting time slot, the switching module is connected with an antenna and a transmitting passage, and a signal to be transmitted of the transmitting passage is transmitted through the antenna;
when the radio frequency receiving and transmitting device is in a receiving time slot, the switching module is connected with the antenna and the receiving passage, and the first signal received by the antenna is processed by the receiving passage to obtain an output signal;
the switching module adjusts the intensity of the first signal based on the output signal feedback until the preset intensity is met.
8. The method of claim 7, wherein the switching module adjusting the intensity of the first signal to meet a preset intensity based on the output signal feedback comprises:
obtaining an RSSI value of the output signal based on the analysis of the output signal;
and determining that the output signal meets a first intensity condition based on the RSSI value, generating a target voltage value corresponding to the output signal, and applying the target voltage value to the signal attenuation unit, wherein the voltage value applied to the signal attenuation unit is positively correlated with attenuation capability.
9. An electronic device, comprising:
an antenna and a radio frequency transceiver device as claimed in any one of claims 1 to 6.
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4405397A (en) * | 1996-09-10 | 1998-04-02 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for suppressing transmitter overtones and receiver blocking signals in a radio transceiver |
| US6400934B1 (en) * | 2001-06-29 | 2002-06-04 | Motorola, Inc. | Method for radio receiver input off-channel and on-channel overload protection |
| WO2006066627A1 (en) * | 2004-12-23 | 2006-06-29 | Freescale Semiconductor, Inc | Wireless communication unit and power control system thereof |
| CN103516379A (en) * | 2012-06-28 | 2014-01-15 | 国基电子（上海）有限公司 | Wireless communication module |
| CN105429656A (en) * | 2015-10-20 | 2016-03-23 | 广州海格通信集团股份有限公司 | Signal processing device based on shortwave broadband reception demodulation front end |
| CN105487069A (en) * | 2015-11-30 | 2016-04-13 | 浙江大学 | Man-made satellite inter-satellite ranging system having on-orbit zero value measurement function and method |
| CN106059618A (en) * | 2016-05-13 | 2016-10-26 | 湖南基石通信技术有限公司 | Method and apparatus for transmitting and receiving signals in radio frequency link |
| CN206524840U (en) * | 2017-02-24 | 2017-09-26 | 北京空间飞行器总体设计部 | Transmit-receive sharing time delay adjustment device |
| CN107257245A (en) * | 2017-06-15 | 2017-10-17 | 海能达通信股份有限公司 | Anti-interference Transmit-Receive Unit, R-T unit and anti-interference attenuation processing method |
| CN108028673A (en) * | 2015-07-15 | 2018-05-11 | 弗劳恩霍夫应用研究促进协会 | The method of transceiver and the self-interference for reducing transceiver |
| CN109302190A (en) * | 2017-07-24 | 2019-02-01 | 深圳市中兴微电子技术有限公司 | NBIOT front end of emission optimization system and method based on DPD |
| CN109361421A (en) * | 2018-12-18 | 2019-02-19 | 成都前锋电子仪器有限责任公司 | Radio frequency front-end unit for radio integration test module |
| CN111478711A (en) * | 2019-01-24 | 2020-07-31 | 海能达通信股份有限公司 | Receiver and communication equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102635039B1 (en) * | 2019-02-08 | 2024-02-08 | 삼성메디슨 주식회사 | Ultrasound apparatus and control method for the same |
-
2021
- 2021-02-10 CN CN202110183817.7A patent/CN114944846B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4405397A (en) * | 1996-09-10 | 1998-04-02 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for suppressing transmitter overtones and receiver blocking signals in a radio transceiver |
| US6400934B1 (en) * | 2001-06-29 | 2002-06-04 | Motorola, Inc. | Method for radio receiver input off-channel and on-channel overload protection |
| WO2006066627A1 (en) * | 2004-12-23 | 2006-06-29 | Freescale Semiconductor, Inc | Wireless communication unit and power control system thereof |
| CN103516379A (en) * | 2012-06-28 | 2014-01-15 | 国基电子（上海）有限公司 | Wireless communication module |
| CN108028673A (en) * | 2015-07-15 | 2018-05-11 | 弗劳恩霍夫应用研究促进协会 | The method of transceiver and the self-interference for reducing transceiver |
| CN105429656A (en) * | 2015-10-20 | 2016-03-23 | 广州海格通信集团股份有限公司 | Signal processing device based on shortwave broadband reception demodulation front end |
| CN105487069A (en) * | 2015-11-30 | 2016-04-13 | 浙江大学 | Man-made satellite inter-satellite ranging system having on-orbit zero value measurement function and method |
| CN106059618A (en) * | 2016-05-13 | 2016-10-26 | 湖南基石通信技术有限公司 | Method and apparatus for transmitting and receiving signals in radio frequency link |
| CN206524840U (en) * | 2017-02-24 | 2017-09-26 | 北京空间飞行器总体设计部 | Transmit-receive sharing time delay adjustment device |
| CN107257245A (en) * | 2017-06-15 | 2017-10-17 | 海能达通信股份有限公司 | Anti-interference Transmit-Receive Unit, R-T unit and anti-interference attenuation processing method |
| CN109302190A (en) * | 2017-07-24 | 2019-02-01 | 深圳市中兴微电子技术有限公司 | NBIOT front end of emission optimization system and method based on DPD |
| CN109361421A (en) * | 2018-12-18 | 2019-02-19 | 成都前锋电子仪器有限责任公司 | Radio frequency front-end unit for radio integration test module |
| CN111478711A (en) * | 2019-01-24 | 2020-07-31 | 海能达通信股份有限公司 | Receiver and communication equipment |
Non-Patent Citations (3)
| Title |
|---|
| A dual-band 802.11abgn/ac transceiver with integrated PA and T/R switch in a digital noise controlled SoC;Y. -H. Chung;《2015 IEEE Custom Integrated Circuits Conference (CICC)》;全文 * |
| 全双工无线通信系统的干扰消除技术研究;杨雨苍;《中国优秀硕士学位论文全文数据库信息科技辑》;全文 * |
| 基于DSP嵌入式技术的远程堤坝回波数据收发系统;许慧雅;《 计算机测量与控制 》;全文 * |
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