CN104023279A - Method of realizing receiving and sending of analog signals in digital interphone and device - Google Patents
Method of realizing receiving and sending of analog signals in digital interphone and device Download PDFInfo
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- CN104023279A CN104023279A CN201410228104.8A CN201410228104A CN104023279A CN 104023279 A CN104023279 A CN 104023279A CN 201410228104 A CN201410228104 A CN 201410228104A CN 104023279 A CN104023279 A CN 104023279A
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Abstract
The invention discloses a method of realizing receiving and sending of analog signals in a digital interphone and a device. The method comprises steps of carrying out analog to digital conversion on input signals, carrying out interpolation filtering on signals after analog to digital conversion or carrying out sub-audio frequency signaling matching, stacking generated sub-audio frequency signaling signals on signals after interpolation filtering and carrying out digital to analog conversion on received signals after interpolation filtering to obtain signals before modulation, or, carrying out value extraction filtering on signals after analog to digital conversion and carrying out digital to analog conversion on received signals after value extraction filtering to obtain signals before electro acoustic conversion. Through the technical scheme provided by the invention, the entire power consumption, the size and the design complexity of the digital interphone compatible with analog channels are reduced, and thus demands from the market and the application field are met.
Description
Technical field
The present invention relates to intercom technology, in espespecially a kind of digital handset, realize the method and apparatus of analog signal transmitting-receiving.
Background technology
Along with deepening continuously of the mould revolution process of intercom communication mechanism, digital handset has obtained increasing application, and the huge analog-interphone of the quantity of using can not be withdrawn from the market and application at short notice, like this, before intercom pure digi-tal, have a very long transitional period.Within this transitional period, analog-and digital-intercom meeting long-term co-existence, therefore, intercom market demand digital handset is realized analog signal transmitting-receiving, with compatibility simulation intercommunication.
The existing digital handset of realizing analog signal transmitting-receiving, simultaneously integrated digital interphone circuit and analog-interphone circuit two cover circuit.This digital handset is owing to supporting two cover circuit simultaneously, make power consumption, size and the design complexities of machine complete machine higher, thereby can not meet well the demand of intercom market to the low-power consumption of the digital handset of compatible analog channel, portability, low design complexities.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides the method and apparatus of realizing analog signal transmitting-receiving in a kind of digital handset, the compatibility of digital handset to analog-interphone be can realize simply, thereby market and the demand of application to digital handset met.
In order to reach the object of the invention, the invention discloses a kind of method that realizes analog signal transmitting-receiving in digital handset, comprise the steps:
Input signal is carried out to analog-to-digital conversion;
Signal after analog-to-digital conversion is carried out to filtering interpolation, or, carry out infrasonic frequency signaling coupling;
The infrasonic frequency signaling-information that on signal, stack generates after filtering interpolation, and signal after the stack signaling obtaining is carried out to digital-to-analogue conversion, obtain modulating front signal; Or, when coupling to analog-to-digital conversion after signal take out value filtering, and to obtain take out value filtering after signal carry out digital-to-analogue conversion, obtain electroacoustic conversion front signal.
At signal transmitter side, described input signal is signal after acoustic-electric conversion, and described method specifically comprises:
Signal after acoustic-electric conversion is carried out to analog-to-digital conversion, obtain signal after transmitter side analog-to-digital conversion;
Signal after the transmitter side analog-to-digital conversion obtaining is carried out to filtering interpolation, obtain signal after filtering interpolation;
The infrasonic frequency signaling-information that on signal, stack generates after the filtering interpolation obtaining, and signal after the stack signaling obtaining is carried out to digital-to-analogue conversion, obtain modulating front signal;
At signal receiver side, described input signal is signal after demodulation, and described method specifically comprises:
Signal after demodulation is carried out to analog-to-digital conversion, obtain signal after receiver side analog-to-digital conversion;
Signal after the receiver side analog-to-digital conversion obtaining is carried out to infrasonic frequency signaling coupling;
When coupling to the receiver side analog-to-digital conversion obtaining after signal take out value filtering, and to obtain take out value filtering after signal carry out digital-to-analogue conversion, obtain electroacoustic conversion front signal.
Described signal after the transmitter side analog-to-digital conversion obtaining is carried out to filtering interpolation, comprising:
Signal after described transmitter side analog-to-digital conversion is carried out to transmitter side the first filtering, obtain signal after transmitter side the first filtering;
Signal after transmitter side the first filtering obtaining is carried out to interpolation, obtain signal after interpolation;
Signal after the interpolation obtaining is carried out to transmitter side the second filtering, obtain signal after described filtering interpolation.
Described signal after the receiver side analog-to-digital conversion obtaining is taken out to value filtering, comprising:
Signal after described receiver side analog-to-digital conversion is carried out to receiver side the first filtering, obtain signal after receiver side the first filtering;
To signal value of taking out after receiver side the first filtering obtaining, obtain the rear signal of the value of taking out;
To the value of taking out obtaining afterwards signal carry out receiver side the second filtering, described in obtaining, take out signal after value filtering.
Described transmitter side the first filtering or described receiver side second are filtered into bandpass filtering treatment.
Described transmitter side the second filtering or described receiver side first are filtered into the filtering of radical sign raised cosine roll off and process.
The more than 8 times or 8 times of the chip rate that after described modulation front signal and described demodulation, the chip rate of signal is air interface.
The invention also discloses the device of realizing analog signal transmitting-receiving in a kind of digital handset, at least comprise: analog-to-digital conversion module, the first processing module and the second processing module; Wherein,
Analog-to-digital conversion module, for carrying out analog-to-digital conversion to input signal;
The first processing module, for signal after analog-to-digital conversion is carried out to filtering interpolation, or, for carrying out infrasonic frequency signaling coupling;
The second processing module, for the infrasonic frequency signaling-information that on signal after filtering interpolation, stack generates, and carries out digital-to-analogue conversion to signal after the stack signaling obtaining, and obtains modulating front signal; Or, for when coupling to analog-to-digital conversion after signal take out value filtering, and to obtain take out value filtering after signal carry out digital-to-analogue conversion, obtain electroacoustic conversion front signal.
At signal transmitter side, described input signal is signal after acoustic-electric conversion, described analog-to-digital conversion module is that transmitter side analog-to-digital conversion module, described the first processing module are that filtering interpolation module, described the second processing module comprise signaling laminating module and transmitter side D/A converter module, wherein
Transmitter side analog-to-digital conversion module, for signal after acoustic-electric conversion is carried out to analog-to-digital conversion, obtains signal after transmitter side analog-to-digital conversion;
Filtering interpolation module, carries out filtering interpolation for signal after the transmitter side analog-to-digital conversion to from described transmitter side analog-to-digital conversion module, obtains signal after filtering interpolation;
Signaling laminating module, for the infrasonic frequency signaling-information that on signal after the filtering interpolation from filtering interpolation module, stack generates, signal after the signaling that obtains superposeing;
Transmitter side D/A converter module, carries out digital-to-analogue conversion for signal after the stack signaling to from signaling laminating module, obtains modulating front signal;
At signal receiver side, described input signal is signal after demodulation, described analog-to-digital conversion module is that receiver side analog-to-digital conversion module, described the first processing module are that signaling matching module, described the second processing module comprise and take out value filtering module and receiver side D/A converter module, wherein
Receiver side analog-to-digital conversion module, carries out analog-to-digital conversion for signal after demodulation, obtains signal after receiver side analog-to-digital conversion;
Signaling matching module, carries out infrasonic frequency signaling coupling for signal after the receiver side analog-to-digital conversion to from described receiver side analog-to-digital conversion module;
Take out value filtering module, for signal after the receiver side analog-to-digital conversion to from described receiver side analog-to-digital conversion module, take out value filtering, obtain taking out signal after value filtering;
Receiver side D/A converter module, for to from described take out value filtering module take out value filtering after signal carry out digital-to-analogue conversion, obtain electroacoustic conversion front signal.
Described filtering interpolation module comprises transmitter side the first filtration module, interpolating module and transmitter side the second filtration module, wherein,
Transmitter side the first filtration module, carries out transmitter side the first filtering for signal after the transmitter side analog-to-digital conversion to from described transmitter side analog-to-digital conversion module, obtains signal after transmitter side the first filtering;
Interpolating module, carries out interpolation for signal after transmitter side the first filtering to from described transmitter side the first filtration module, obtains signal after interpolation;
Transmitter side the second filtration module, carries out transmitter side the second filtering to signal after the interpolation from described interpolating module, obtains signal after described filtering interpolation.
The described value filtering module of taking out comprises receiver side the first filtration module, the value of taking out module and receiver side the second filtration module, wherein,
Receiver side the first filtration module, carries out receiver side the first filtering for signal after the receiver side analog-to-digital conversion to from described receiver side analog-to-digital conversion module, obtains signal after receiver side the first filtering;
The value of taking out module, for signal value of taking out after receiver side the first filtering to from described receiver side the first filtration module, obtains the rear signal of the value of taking out;
Receiver side the second filtration module, carries out receiver side the second filtering for signal after the value of taking out to from the described value of taking out module, takes out signal after value filtering described in obtaining.
Compared with prior art, in a kind of digital handset of the present invention, realize the method and apparatus of analog signal transmitting-receiving, comprising: input signal is carried out to analog-to-digital conversion; Signal after analog-to-digital conversion is carried out to filtering interpolation, or, carry out infrasonic frequency signaling coupling; The infrasonic frequency signaling-information that on signal, stack generates after filtering interpolation, and signal after the stack signaling obtaining is carried out to digital-to-analogue conversion, obtain modulating front signal, or, when coupling to analog-to-digital conversion after signal take out value filtering, and to obtain take out value filtering after signal carry out digital-to-analogue conversion, obtain electroacoustic conversion front signal.Technical scheme provided by the invention, realization is in digital handset, compatible analog-interphone, and do not increase any hardware circuit, machine Overall Power Consumption, size and design complexities are reduced, thereby met market and the demand of application to the low-power consumption of the digital handset of compatible analog-interphone, portability, low design complexities.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, or understand by implementing the present invention.Object of the present invention and other advantages can be realized and be obtained by specifically noted structure in specification, claims and accompanying drawing.
Accompanying drawing explanation
Accompanying drawing is used to provide the further understanding to technical solution of the present invention, and forms a part for specification, is used from explanation technical scheme of the present invention with the application's embodiment mono-, does not form the restriction to technical solution of the present invention.
Fig. 1 is the flow chart of realizing the method for analog signal transmitting-receiving in digital handset of the present invention;
Fig. 2 (a) is for realizing the transmitter side flow chart of the method for analog signal transmitting-receiving in digital handset of the present invention;
Fig. 2 (b) is for realizing the receiver side flow chart of the method for analog signal transmitting-receiving in digital handset of the present invention;
Fig. 3 is the composition structural scheme of mechanism of realizing the device of analog signal transmitting-receiving in digital handset;
Fig. 4 (a) is for realizing the composition structural representation of device of the transmitter side of analog signal transmitting-receiving in digital handset of the present invention;
Fig. 4 (b) is for realizing the composition structural representation of device of the receiver side of analog signal transmitting-receiving in digital handset of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, hereinafter in connection with accompanying drawing, embodiments of the invention are elaborated.It should be noted that, in the situation that not conflicting, the embodiment in the application and the feature in embodiment be combination in any mutually.
In the step shown in the flow chart of accompanying drawing, can in the computer system such as one group of computer executable instructions, carry out.And, although there is shown logical order in flow process, in some cases, can carry out shown or described step with the order being different from herein.
Fig. 1 is the flow chart of realizing the method for analog signal transmitting-receiving in digital handset of the present invention, as shown in Figure 1, comprises the following steps:
Step 101: input signal is carried out to analog-to-digital conversion.Wherein,
At signal transmitter side, input signal is carried out to analog-to-digital conversion, wherein, input signal is signal after acoustic-electric conversion.
At signal receiver side, input signal is carried out to analog-to-digital conversion, wherein, input signal is signal after demodulation.
Step 102: signal after analog-to-digital conversion is carried out to filtering interpolation, or, carry out infrasonic frequency signaling coupling.Wherein,
At signal transmitter side, signal after analog-to-digital conversion is carried out to filtering interpolation.
At signal receiver side, carry out infrasonic frequency signaling coupling.
Step 103: the infrasonic frequency signaling-information that on signal, stack generates after filtering interpolation, and signal after the stack signaling obtaining is carried out to digital-to-analogue conversion, obtain modulating front signal; Or, when coupling to analog-to-digital conversion after signal take out value filtering, and to obtain take out value filtering after signal carry out digital-to-analogue conversion, obtain electroacoustic conversion front signal.Wherein,
At signal transmitter side, the infrasonic frequency signaling-information that on signal, stack generates after filtering interpolation, and signal after the stack signaling obtaining is carried out to digital-to-analogue conversion, obtain modulating front signal.
At signal receiver side, when coupling to analog-to-digital conversion after signal take out value filtering, and to obtain take out value filtering after signal carry out digital-to-analogue conversion, obtain electroacoustic conversion front signal.
Below in conjunction with Fig. 2 (a) and Fig. 2 (b), describe transmitter side and concrete function and the realization of each step of receiver side as shown in Figure 1 in detail.
Fig. 2 (a), for the present invention realizes the transmitter side flow chart of realizing the method for analog signal transmitting-receiving in digital handset, as shown in Fig. 2 (a), comprises the following steps at signal transmitter side:
Step 201: signal after acoustic-electric conversion is carried out to analog-to-digital conversion, obtain signal after transmitter side analog-to-digital conversion.
Before this step, also comprise: voice signal is carried out to acoustic-electric conversion, obtain the rear signal of acoustic-electric conversion.Acoustic-electric is converted to those skilled in the art's conventional techniques means, and the protection range being not intended to limit the present invention, repeats no more here.
In this step, after analog-to-digital conversion, the chip rate of signal equals analog-to-digital sampling rate, according to Nyquist criterion, the analog-to-digital conversion sampling rate of human speech signal is at least 8k/s, therefore,, in this step, can select the sampling rate that is more than or equal to 8k/s to realize analog-to-digital conversion.Preferably, adopting the sampling rate be greater than 8k/s to carry out analog-to-digital conversion is conducive to improve signal to noise ratio and improves signal quality.
In the embodiment 1 that is 4.8kbit/s based on digital private mobile radio (DPMR) transmission rate standard, air interface, the analog-to-digital sampling rate that can arrange on transmitter side is 16k/s.
Wherein, the conventional techniques means that modulus conversion technique is those skilled in the art, the protection range being not intended to limit the present invention, repeats no more here.
Step 202: signal after the transmitter side analog-to-digital conversion obtaining is carried out to filtering interpolation, obtain signal after filtering interpolation.As shown in Fig. 2 (a), this step specifically comprises:
Step 202-1: signal after transmitter side analog-to-digital conversion is carried out to transmitter side the first filtering, obtain signal after transmitter side the first filtering.Wherein,
Transmitter side the first filtering can be bandpass filtering treatment, to retain the signal of the main frequency range of voice, and the interference of other frequency range of filtering simultaneously.
Specifically, because the main frequency scope of voice signal is 300Hz-3400Hz, so transmitter side the first filtering can be processed for the digital band pass filter that frequency range is 300Hz～3400Hz.
The conventional techniques means that the specific implementation that digital band pass filtering is processed is those skilled in the art, the protection range being not intended to limit the present invention, repeats no more here.
Step 202-2: signal after transmitter side the first filtering obtaining is carried out to interpolation, obtain signal after interpolation.
In above-described embodiment 1, after execution step 202-1, after transmitter side the first filtering, the speed chip rate of signal is 16kbaud/s.After execution step 202-2, after the interpolation obtaining, the chip rate of signal is 19.2kbaud/s.That is to say, in step 202-2, by carrying out interpolation, signal element speed is brought up to 19.2kbaud/s from 16kbaud/s, and then make the chip rate of the signal processed in subsequent step bring up to 19.2kbaud/s, thereby realized signal from acoustic-electric conversion, to the speed-raising of the chip rate of modulation front signal, mate.Specifically,
Interpolation in this step can be inserted 1 code element that value is 0 by every 5 code elements, and guarantees that the processing time of 6 code elements that the processing time of front 5 code elements of interpolation is corresponding with these 5 code elements after interpolation equates to realize.
Step 202-3: signal after the interpolation obtaining is carried out to transmitter side the second filtering, obtain signal after filtering interpolation.Wherein,
Transmitter side the second filtering can be radical sign raised cosine roll off filter process, with signal after guaranteeing filtering interpolation, in bandwidth efficient channel, transmits.Wherein, bandwidth efficient channel is that the frequency range of the signal of transmission on it is subject to the channel of the restriction that channel self-characteristic causes.The conventional techniques means that the specific implementation technology that the filtering of radical sign raised cosine roll off is processed is those skilled in the art, the protection range being not intended to limit the present invention, repeats no more here.
Step 203: the infrasonic frequency signaling-information that on signal, stack generates after the filtering interpolation obtaining, and signal after the stack signaling obtaining is carried out to digital-to-analogue conversion, obtain modulating front signal.
Simulation intercommunication requires to adopt infrasonic frequency signaling to realize signaling and controls, and the frequency of infrasonic frequency signaling is less than 300Hz.Specifically, the infrasonic frequency signaling-information that on signal, stack generates after the filtering interpolation obtaining, is equivalent to the infrasonic frequency signaling-information generating in signal after filtering interpolation and this step to be added in time domain.
In this step, generate the specific implementation of infrasonic frequency signaling-information and digital-to-analogue conversion, and the method that is added in time domain of the signal conventional techniques means that are those skilled in the art, the protection range being not intended to limit the present invention, repeats no more here.
After the method, also comprise: modulation front signal is carried out to frequency shift keying (4FSK) modulation and obtain modulating rear signal, and be sent to air interface.Wherein,
Air interface is the wave point between digital handset, and in order to guarantee modulating performance, the chip rate of modulation front signal is the more than 8 times or 8 times of chip rate corresponding to air interface.For example, the transmission rate of air interface is 4.8kbit/s, owing to adopting 4FSK modulation, and the corresponding 2bit of each code element, the chip rate of air interface is 2.4kbaud/s, correspondingly, the chip rate of modulation front signal is at least 19.2kbaud/s.The realization of 4FSK modulation, is those skilled in the art's conventional techniques means, and the protection range being not intended to limit the present invention, repeats no more here.
Fig. 2 (b), for the present invention realizes the receiver side flow chart of realizing the method for analog signal transmitting-receiving in digital handset, as shown in Fig. 2 (b), comprises the following steps at signal receiver side:
Step 211: signal after demodulation is carried out to analog-to-digital conversion, obtain signal after receiver side analog-to-digital conversion.
Before this step, also comprise: the signal of receiving from air interface is carried out to 4FSK rectification, obtain signal after demodulation.
Wherein, the realization of 4FSK rectification, is those skilled in the art's conventional techniques means, and the protection range being not intended to limit the present invention, repeats no more here.
In this step, according to the symmetry of transceiver communication direction function, after demodulation, the chip rate of signal is identical with the chip rate of the modulation front signal of corresponding transmitter side step 203.
In embodiment 1, because the chip rate of the modulation front signal of transmitter side is 19.2kbaud/s, so the chip rate of signal is 19.2kbaud/s after the demodulation of receiver side, correspondingly, the analog-to-digital sampling rate that signal after demodulation is carried out on receiver side is 19.2k/s.
Wherein, the conventional techniques means that modulus conversion technique is those skilled in the art, the protection range being not intended to limit the present invention, repeats no more here.
Step 212: signal after the receiver side analog-to-digital conversion obtaining is carried out to infrasonic frequency signaling coupling.
Wherein, carry out infrasonic frequency signaling coupling and refer to, by sinusoidal wave matching treatment, the data of the infrasonic frequency signaling extracting in signal after the sinusoidal wave data of pre-stored characteristic frequency and receiver side analog-to-digital conversion are contrasted.
Wherein, because the frequency of infrasonic frequency signaling is less than 300Hz, so by signal after receiving side form number conversion is carried out to 300Hz low-pass filtering treatment, extract the data of infrasonic frequency signaling.
Wherein, the conventional techniques means that the sinusoidal wave selection of characteristic frequency and the specific implementation of sinusoidal wave matching treatment are those skilled in the art, the protection range being not intended to limit the present invention, repeats no more here.
Step 213: when coupling to the receiver side analog-to-digital conversion obtaining after signal take out value filtering, and to obtain take out value filtering after signal carry out digital-to-analogue conversion, obtain electroacoustic conversion front signal.
That is to say, if do not mated, skip this step.If coupling, takes out value filtering to signal after the receiver side analog-to-digital conversion obtaining, comprise the following steps:
Step 213-1: signal after receiving side form number conversion is carried out to receiver side the first filtering, obtain signal after receiver side the first filtering.Wherein,
Receiver side the first filtering can be radical sign raised cosine roll off filter process, to guarantee that receiver side the first filtering signal transmits in bandwidth efficient channel.
Those skilled in the art need be clear that the coefficient that the filtering of receiver side radical sign raised cosine roll off is processed need to be identical with the coefficient that the filtering of transmitter side radical sign raised cosine roll off is processed, thereby guarantee receiver sensitivity.
The definition of coefficient of radical sign raised cosine roll off filter and the method for setting thereof, be those skilled in the art's conventional techniques means, and the protection range being not intended to limit the present invention, repeats no more here.
Step 213-2: to signal value of taking out after receiver side the first filtering obtaining, obtain the rear signal of the value of taking out.
According to the symmetry of transceiver communication direction function, after transmitter side the first filtering of the chip rate of signal and corresponding transmitter side step 202-2, signal is that the chip rate of interpolation front signal is equal after the value of taking out.
In execution mode 1, because the chip rate of signal after transmitter side the first filtering is 16kbaud/s, so the chip rate of signal should be 16kbaud/s after the value of taking out.Like this, just require by this step, make signal element speed be reduced to 16kbaud/s from 19.2kbaud/s, and then to make the chip rate of signal in subsequent step be 16kbaud/s, thereby realized from demodulation signal to the reduction of speed coupling of the chip rate of electroacoustic conversion front signal.Specifically,
The value of taking out in this step can be extracted 1 code element out by every 6 code elements, and guarantees that the processing time of 5 code elements that processing time of front 6 code elements of the value of taking out is corresponding with these 6 code elements after interpolation equates to realize.
Step 213-3: to the value of taking out obtaining afterwards signal carry out receiver side the second filtering, obtain taking out signal after value filtering.Wherein,
Receiver side the second filtering can be bandpass filtering treatment, obtains taking out signal after value filtering, to retain the signal of the main frequency range of voice, and the interference of other frequency range of filtering simultaneously.
Specifically, because the main frequency scope of voice signal is 300Hz-3400Hz, so receiver side the second filtering can be processed for the digital band pass filtering that frequency range is 300Hz～3400Hz.
Next, to obtain take out value filtering after signal carry out digital-to-analogue conversion, obtain electroacoustic conversion front signal.
Wherein, the conventional techniques means that modulus conversion technique is those skilled in the art, the protection range being not intended to limit the present invention, repeats no more here.
After the method, also comprise: electroacoustic conversion front signal is carried out to electroacoustic conversion, and obtaining the rear signal of electroacoustic conversion is voice signal.
Further,
The inventive method also comprises: check user configured communication type, if communication type is configured to emulation mode, the method is in state of activation, otherwise the method is in resting state.Communication type can be set in advance as to digital state.Specifically,
If the inventive method is that communication type is configured to emulation mode in state of activation, the digital handset of realizing the inventive method is used analog channel to communicate, if the inventive method is that communication type is configured to digital state in resting state, the digital handset of realizing the inventive method is used digital channel to communicate.
By the above-mentioned symmetric description about transceiver communication direction function, can obtain, in the methods of the invention, the more than 8 times or 8 times of chip rate that after modulation front signal and demodulation, the chip rate of signal is air interface.
The inventive method can realize in the digital handset of multiple air interface rate.For example, the inventive method can realize in the digital handset embodiment 2 that is 9.6kbit/s based on transmission rate DMR standard, air interface.
In embodiment 2, because the transmission rate of air interface is 9.6kbit/s, its chip rate is 4.8kbaud/s, so the chip rate after modulation front signal and demodulation is at least 38.4kbaud/s, in this embodiment, chip rate after modulation front signal and demodulation is 38.4kbaud/s, and chip rate the be 16kbaud/s identical with embodiment 1 of the rear signal of acoustic-electric conversion and electroacoustic conversion front signal.Specifically,
On transmitter side, by the interpolation processing of step 202-2, the chip rate of signal is brought up to 38.4kbaud/s from 16kbaud/s, thereby realized signal from acoustic-electric conversion, to the speed-raising of the chip rate of modulation front signal, mate.
Correspondingly, on receiver side, the value of taking out by step 213-2 is processed, and the chip rate of signal is reduced to 16kbaud/s from 38.4kbaud/s, thereby has realized from demodulation signal to the reduction of speed coupling of the chip rate of electroacoustic conversion front signal.
The inventive method can be applied to realize in the digital handset of different digital handset standards, owing to adopting different digital handset standards, the speed of air interface may be different, and in addition, different digital handset standards can not affect the other side of the inventive method.Correspondingly,
Because the inventive method can realize in the digital handset of multiple air interface rate, therefore, the inventive method can realize analog signal transmitting-receiving in the digital handset of realizing the digital handset standards such as digital private mobile radio (DPMR), digital mobile radio (DMR), integrated digital enhanced network (iDEN) and pan-European trunked radio (TETRA).That is to say,
The inventive method can realize compatiblely in the digital handset of realizing different digital handset standards and simulate intercom to realize, and has the compatibility good with various digital handset standards.
Fig. 3 is the composition structural scheme of mechanism of realizing the device of analog signal transmitting-receiving in digital handset, as shown in Figure 3, at least comprises: analog-to-digital conversion module 301, the first processing module 302 and the second processing module 303.Wherein,
Analog-to-digital conversion module 301, for carrying out analog-to-digital conversion to input signal.Wherein,
At signal transmitter side, analog-to-digital conversion module 301 is for carrying out analog-to-digital conversion to input signal, and wherein, input signal is signal after acoustic-electric conversion.
At signal receiver side, analog-to-digital conversion module 301 is for carrying out analog-to-digital conversion to input signal, and wherein, input signal is signal after demodulation.
The first processing module 302, for signal after analog-to-digital conversion is carried out to filtering interpolation, or, for carrying out infrasonic frequency signaling coupling.Wherein,
At signal transmitter side, the first processing module 302 is for carrying out filtering interpolation to signal after analog-to-digital conversion.
At signal receiver side, the first processing module 302 is in carrying out infrasonic frequency signaling coupling.
The second processing module 303, for the infrasonic frequency signaling-information that on signal after filtering interpolation, stack generates, and carries out digital-to-analogue conversion to signal after the stack signaling obtaining, and obtains modulating front signal; Or, for when coupling to analog-to-digital conversion after signal take out value filtering, and to obtain take out value filtering after signal carry out digital-to-analogue conversion, obtain electroacoustic conversion front signal.Wherein,
At signal transmitter side, the infrasonic frequency signaling-information of the second processing module 303 for superposeing and generate on signal after filtering interpolation, and signal after the stack signaling obtaining is carried out to digital-to-analogue conversion, obtain modulating front signal.
At signal receiver side, the second processing module 303 for when coupling to analog-to-digital conversion after signal take out value filtering, and to obtain take out value filtering after signal carry out digital-to-analogue conversion, obtain electroacoustic conversion front signal.
Below in conjunction with Fig. 4 (a) and Fig. 4 (b), detailed description each module as shown in Figure 3 and the corresponding relation of each module as shown in Fig. 4 (a) and Fig. 4 (b), and the function of each module as shown in Fig. 4 (a) and Fig. 4 (b).
Fig. 4 (a) realizes for the present invention realizes in digital handset the composition structural representation that analog signal is received and dispatched the device of transmitter side, as Fig. 4 (a) comprises transmitter side analog-to-digital conversion module 401, filtering interpolation module 402, signaling laminating module 403 and transmitter side D/A converter module 404.Wherein,
Analog-to-digital conversion module 301 is that transmitter side analog-to-digital conversion module 401, the first processing module 302 are that filtering interpolation module 402, the second processing module 303 comprise signaling laminating module 403 and transmitter side D/A converter module 404.Wherein,
Transmitter side analog-to-digital conversion module 401, for signal after acoustic-electric conversion is carried out to analog-to-digital conversion, obtains signal after transmitter side analog-to-digital conversion.
Filtering interpolation module 402, carries out filtering interpolation for signal after the transmitter side analog-to-digital conversion to from transmitter side analog-to-digital conversion module 401, obtains signal after filtering interpolation.Wherein, filtering interpolation module 402 comprises transmitter side the first filtration module 402-1, interpolating module 402-2 and transmitter side the second filtration module 402-3, wherein,
Transmitter side the first filtration module 402-1, carries out transmitter side the first filtering for signal after the transmitter side analog-to-digital conversion to from transmitter side analog-to-digital conversion module 401, obtains signal after transmitter side the first filtering.
Interpolating module 402-2, carries out interpolation for signal after transmitter side the first filtering to from transmitter side the first filtration module 402-1, obtains signal after interpolation.
Transmitter side the second filtration module 402-3, carries out transmitter side the second filtering to signal after the interpolation from interpolating module 402-2, obtains signal after filtering interpolation.
Signaling laminating module 403, for the infrasonic frequency signaling-information that on signal after the filtering interpolation from filtering interpolation module 402, stack generates, signal after the signaling that obtains superposeing.
Transmitter side D/A converter module 404, carries out digital-to-analogue conversion for signal after the stack signaling to from signaling laminating module 403, obtains modulating front signal.
Fig. 4 (b) realizes the composition structural representation of the device of analog signal transmitting-receiving receiver side in digital handset for the present invention realizes, as shown in Fig. 4 (b), comprise receiver side analog-to-digital conversion module 411, signaling matching module 412, take out value filtering module 413 and receiver side D/A converter module 414.Wherein,
Analog-to-digital conversion module 301 is that receiver side analog-to-digital conversion module 411, the first processing module 302 are taken out value filtering module 413 and receiver side D/A converter module 414 for signaling matching module 412, the second processing module 303 comprise.Wherein,
Receiver side analog-to-digital conversion module 411, for signal after demodulation is carried out to analog-to-digital conversion, obtains signal after receiver side analog-to-digital conversion.
Signaling matching module 412, carries out infrasonic frequency signaling coupling for signal after the receiver side analog-to-digital conversion to from receiver side analog-to-digital conversion module 411.
Take out value filtering module 413, for signal after the receiver side analog-to-digital conversion to from receiver side analog-to-digital conversion module 411, take out value filtering, obtain taking out signal after value filtering.Wherein, take out value filtering module 413 and comprise receiver side the first filtration module 413-1, the value of taking out module 413-2 and receiver side the second filtration module 413-3, wherein,
Receiver side the first filtration module 413-1, carries out receiver side the first filtering for signal after the receiver side analog-to-digital conversion to from receiver side analog-to-digital conversion module 321, obtains signal after receiver side the first filtering.
The value of taking out module 413-2, for signal value of taking out after receiver side the first filtering to from receiver side the first filtration module 413-1, obtains the rear signal of the value of taking out.
Receiver side the second filtration module 413-3, carries out receiver side the second filtering for signal after the value of taking out to from the value of taking out module 413-2, obtains taking out signal after value filtering.
Receiver side D/A converter module 414, for to from take out value filtering module 413 take out value filtering after signal carry out digital-to-analogue conversion, obtain electroacoustic conversion front signal.
Although the disclosed execution mode of the present invention as above, the execution mode that described content only adopts for ease of understanding the present invention, not in order to limit the present invention.Those of skill in the art under any the present invention; do not departing under the prerequisite of the disclosed spirit and scope of the present invention; can in the form of implementing and details, carry out any modification and variation; but scope of patent protection of the present invention, still must be as the criterion with the scope that appending claims was defined.
Claims (11)
1. a method that realizes analog signal transmitting-receiving in digital handset, is characterized in that, comprising:
Input signal is carried out to analog-to-digital conversion;
Signal after analog-to-digital conversion is carried out to filtering interpolation, or, carry out infrasonic frequency signaling coupling;
The infrasonic frequency signaling-information that on signal, stack generates after filtering interpolation, and signal after the stack signaling obtaining is carried out to digital-to-analogue conversion, obtain modulating front signal; Or, when coupling to analog-to-digital conversion after signal take out value filtering, and to obtain take out value filtering after signal carry out digital-to-analogue conversion, obtain electroacoustic conversion front signal.
2. method according to claim 1, is characterized in that,
At signal transmitter side, described input signal is signal after acoustic-electric conversion, and described method specifically comprises:
Signal after acoustic-electric conversion is carried out to analog-to-digital conversion, obtain signal after transmitter side analog-to-digital conversion;
Signal after the transmitter side analog-to-digital conversion obtaining is carried out to filtering interpolation, obtain signal after filtering interpolation;
The infrasonic frequency signaling-information that on signal, stack generates after the filtering interpolation obtaining, and signal after the stack signaling obtaining is carried out to digital-to-analogue conversion, obtain modulating front signal;
At signal receiver side, described input signal is signal after demodulation, and described method specifically comprises:
Signal after demodulation is carried out to analog-to-digital conversion, obtain signal after receiver side analog-to-digital conversion;
Signal after the receiver side analog-to-digital conversion obtaining is carried out to infrasonic frequency signaling coupling;
When coupling to the receiver side analog-to-digital conversion obtaining after signal take out value filtering, and to obtain take out value filtering after signal carry out digital-to-analogue conversion, obtain electroacoustic conversion front signal.
3. method according to claim 2, is characterized in that, described signal after the transmitter side analog-to-digital conversion obtaining is carried out to filtering interpolation, comprising:
Signal after described transmitter side analog-to-digital conversion is carried out to transmitter side the first filtering, obtain signal after transmitter side the first filtering;
Signal after transmitter side the first filtering obtaining is carried out to interpolation, obtain signal after interpolation;
Signal after the interpolation obtaining is carried out to transmitter side the second filtering, obtain signal after described filtering interpolation.
4. method according to claim 2, is characterized in that, described signal after the receiver side analog-to-digital conversion obtaining is taken out to value filtering, comprising:
Signal after described receiver side analog-to-digital conversion is carried out to receiver side the first filtering, obtain signal after receiver side the first filtering;
To signal value of taking out after receiver side the first filtering obtaining, obtain the rear signal of the value of taking out;
To the value of taking out obtaining afterwards signal carry out receiver side the second filtering, described in obtaining, take out signal after value filtering.
5. according to the method described in claim 3 or 4, it is characterized in that, described transmitter side the first filtering or described receiver side second are filtered into bandpass filtering treatment.
6. according to the method described in claim 3 or 4, it is characterized in that, described transmitter side the second filtering or described receiver side first are filtered into the filtering of radical sign raised cosine roll off and process.
7. method according to claim 2, is characterized in that, the more than 8 times or 8 times of the chip rate that after described modulation front signal and described demodulation, the chip rate of signal is air interface.
8. a device of realizing analog signal transmitting-receiving in digital handset, is characterized in that, at least comprises: analog-to-digital conversion module, the first processing module and the second processing module; Wherein,
Analog-to-digital conversion module, for carrying out analog-to-digital conversion to input signal;
The first processing module, for signal after analog-to-digital conversion is carried out to filtering interpolation, or, for carrying out infrasonic frequency signaling coupling;
The second processing module, for the infrasonic frequency signaling-information that on signal after filtering interpolation, stack generates, and carries out digital-to-analogue conversion to signal after the stack signaling obtaining, and obtains modulating front signal; Or, for when coupling to analog-to-digital conversion after signal take out value filtering, and to obtain take out value filtering after signal carry out digital-to-analogue conversion, obtain electroacoustic conversion front signal.
9. device according to claim 8, it is characterized in that, at signal transmitter side, described input signal is signal after acoustic-electric conversion, described analog-to-digital conversion module is that transmitter side analog-to-digital conversion module, described the first processing module are that filtering interpolation module, described the second processing module comprise signaling laminating module and transmitter side D/A converter module, wherein
Transmitter side analog-to-digital conversion module, for signal after acoustic-electric conversion is carried out to analog-to-digital conversion, obtains signal after transmitter side analog-to-digital conversion;
Filtering interpolation module, carries out filtering interpolation for signal after the transmitter side analog-to-digital conversion to from described transmitter side analog-to-digital conversion module, obtains signal after filtering interpolation;
Signaling laminating module, for the infrasonic frequency signaling-information that on signal after the filtering interpolation from filtering interpolation module, stack generates, signal after the signaling that obtains superposeing;
Transmitter side D/A converter module, carries out digital-to-analogue conversion for signal after the stack signaling to from signaling laminating module, obtains modulating front signal;
At signal receiver side, described input signal is signal after demodulation, described analog-to-digital conversion module is that receiver side analog-to-digital conversion module, described the first processing module are that signaling matching module, described the second processing module comprise and take out value filtering module and receiver side D/A converter module, wherein
Receiver side analog-to-digital conversion module, carries out analog-to-digital conversion for signal after demodulation, obtains signal after receiver side analog-to-digital conversion;
Signaling matching module, carries out infrasonic frequency signaling coupling for signal after the receiver side analog-to-digital conversion to from described receiver side analog-to-digital conversion module;
Take out value filtering module, for signal after the receiver side analog-to-digital conversion to from described receiver side analog-to-digital conversion module, take out value filtering, obtain taking out signal after value filtering;
Receiver side D/A converter module, for to from described take out value filtering module take out value filtering after signal carry out digital-to-analogue conversion, obtain electroacoustic conversion front signal.
10. according to the device shown in claim 9, it is characterized in that, described filtering interpolation module comprises transmitter side the first filtration module, interpolating module and transmitter side the second filtration module, wherein,
Transmitter side the first filtration module, carries out transmitter side the first filtering for signal after the transmitter side analog-to-digital conversion to from described transmitter side analog-to-digital conversion module, obtains signal after transmitter side the first filtering;
Interpolating module, carries out interpolation for signal after transmitter side the first filtering to from described transmitter side the first filtration module, obtains signal after interpolation;
Transmitter side the second filtration module, carries out transmitter side the second filtering to signal after the interpolation from described interpolating module, obtains signal after described filtering interpolation.
11. according to the device shown in claim 9, it is characterized in that, described in take out value filtering module and comprise receiver side the first filtration module, the value of taking out module and receiver side the second filtration module, wherein,
Receiver side the first filtration module, carries out receiver side the first filtering for signal after the receiver side analog-to-digital conversion to from described receiver side analog-to-digital conversion module, obtains signal after receiver side the first filtering;
The value of taking out module, for signal value of taking out after receiver side the first filtering to from described receiver side the first filtration module, obtains the rear signal of the value of taking out;
Receiver side the second filtration module, carries out receiver side the second filtering for signal after the value of taking out to from the described value of taking out module, takes out signal after value filtering described in obtaining.
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Application publication date: 20140903 |