CN101291183B - Radio frequency network topology simulating apparatus - Google Patents
Radio frequency network topology simulating apparatus Download PDFInfo
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- CN101291183B CN101291183B CN2008100287398A CN200810028739A CN101291183B CN 101291183 B CN101291183 B CN 101291183B CN 2008100287398 A CN2008100287398 A CN 2008100287398A CN 200810028739 A CN200810028739 A CN 200810028739A CN 101291183 B CN101291183 B CN 101291183B
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Abstract
The invention discloses a radio-frequency network topology simulation device, which is used for simulating and verifying network characteristics between at least one transmitting terminal and at least one receiving terminal. The device comprises a noise generating device and at least one first radio-frequency processing device connected with the output end of the noise generating device; and the first radio-frequency processing device comprises a first integrated unit which is used for receiving and outputting radio-frequency signals of the transmitting terminal and noise signals of the noise generating device after the integrated processing. Through controlling the mode that a noise signal level is larger than a space radiation level of the transmitting terminal, space radiation signals of the transmitting terminal are drown out by the outputted noise signals, so the topology connection state between the transmitting terminal and the receiving terminal can be controlled, an almost real radio-frequency simulating environment is provided for the transmitting terminal and the receiving terminal on the connection of a radio-frequency channel, the network characteristic between the transmitting terminal and the receiving terminal can be further simulated and verified in a short distance (such as indoor), thereby saving manpower and material resource.
Description
Technical field
The present invention relates to the measuring technology of wireless communication field, relate in particular to a kind of radio frequency network topology simulating apparatus.
Background technology
Carry out the networking checking between a plurality of radio station, generally adopt following method; First kind is to draw in the open air apart from the networking test, but because the complexity of open-air electromagnetic environment often can't be set up out the topological structure of imagination in advance, has both expended great amount of manpower and material resources, does not reach expected effect again.Second kind is to carry out base band emulation, but this method is that baseband signal is carried out emulation, because Base-Band Processing is a part in whole radio station, so base band emulation can not truly reflect the networking performance in whole radio station, carry out emulation so only be adapted at the radio station stage of developing by development side oneself, and after the development end of radio station, the user who is responsible for check radio station networking performance then can't carry out this base band emulation.The third is, carries out networking emulation with pure software, and this pure software emulation can not reflect the networking performance between a plurality of radio station really.
Summary of the invention
The invention provides a kind of radio frequency network topology simulating apparatus, can in short distance, simulate and verify, improve the authenticity and the validity of networking simulation the networking characteristic between a plurality of emission of radio frequency signals ends and the receiving terminal.
Technical scheme of the present invention is: a kind of radio frequency network topology simulating apparatus, be used for the networking characteristic between at least one transmitting terminal and at least one receiving terminal is simulated and verified, comprise noise-producing equipment, at least one first radio frequency handling device that is connected with described noise-producing equipment output; Described first radio frequency handling device comprises first integral unit, is used to receive the radiofrequency signal of transmitting terminal and the noise signal of described noise-producing equipment output, carries out outputing to receiving terminal after the integration processing;
Wherein, the noise signal level of described noise-producing equipment output is greater than the space radiation level between described transmitting terminal and the receiving terminal, less than the level of RF signals of described transmitting terminal emission.
Radio frequency network topology simulating apparatus of the present invention, noise signal level by control noise-producing equipment output is greater than the space radiation signal level of transmitting terminal, thereby when effectively preventing the transmitting terminal emitting radio frequency signal, other receiving terminals that are connected with this transmitting terminal do not receive the phenomenon of this transmitting terminal space radiation signal, and then can make the topological structure between transmitting terminal and the receiving terminal controlled, effectively realized in the radio-frequency channel networking characteristic between the Devices to test (as the radio station) being simulated and being verified, for short-range topologic network simulation between transmitting terminal and the receiving terminal, provide one near real radio frequency analog environment.Further, because the present invention has effectively solved the space radiation interference problem in the Devices to test short distance, thereby make the present invention be particularly useful for verifying in the networking of a plurality of Devices to tests of indoor realization, thereby avoided the complexity problem of open-air electromagnetic environment, can provide more near real radio-frequency electromagnetic environment.Because the present invention can finish the networking checking of radio station in radio-frequency channel indoor, so can save great amount of manpower and material resources for the networking checking, make verifier's networking performance to Devices to test in very short time make fast detecting.
Description of drawings
Fig. 1 is the schematic diagram of the analog machine of one embodiment of the invention;
Fig. 2 is the circuit diagram of noise-producing equipment one embodiment of the present invention;
Fig. 3 is the schematic diagram of the analog machine of one embodiment of the invention;
Fig. 4 is the schematic diagram of the analog machine of one embodiment of the invention;
Fig. 5 is the wherein structural representation of an embodiment of the present invention;
Fig. 6 is the wherein structural representation of an embodiment of the present invention;
Fig. 7 is the electrical block diagram of one embodiment of the invention;
Fig. 8 is the electrical block diagram of one embodiment of the invention;
Fig. 9 is the electrical block diagram in specific embodiment of the present invention.
Embodiment
The invention provides a kind of radio frequency network topology simulating apparatus, can be implemented in the radio-frequency channel networking feature between the Devices to test (as the radio station) of emitting radio frequency signal is simulated and verified.Usually Devices to test is when the emission wireless signal, there is stronger space radiation in its vicinity, distance between a plurality of Devices to tests in the network relatively hour, other Devices to tests might effectively receive the space radiation signal of this transmitting terminal, thereby be in on-state, make and effectively to carry out the networking simulation between the Devices to test.Especially a plurality of Devices to tests in short distance (for example, indoor) during emitting radio frequency signal, it may present the full-mesh structure on network topology structure, thereby cause to carry out the networking simulation, therefore, desire to be implemented in and carry out the networking test in the radio-frequency channel, need to solve the space radiation interference problem between the equipment to be tested, the present invention provides concrete realization means by following examples.When radio frequency network topology simulating apparatus of the present invention is particularly useful for existing a plurality of Devices to test in short distance, the networking characteristic between the Devices to test is simulated and verified.
Below in conjunction with the drawings and specific embodiments the present invention is done a detailed elaboration.
Radio frequency network topology simulating apparatus of the present invention is used for the networking characteristic between at least one emission of radio frequency signals end and the receiving terminal is simulated and verified, in actual applications, the emission of radio frequency signals receiving terminal can be the radio station, and the radio station can be used as the transmitting terminal and the receiving terminal of radiofrequency signal.
As shown in Figure 1, radio frequency network topology simulating apparatus of the present invention comprises the noise-producing equipment and first radio frequency handling device, wherein said first radio frequency handling device comprises and is connected transmitting terminal, first integral unit between the receiving terminal, the output of noise-producing equipment is connected with described first integral unit, described first integral unit receives the radiofrequency signal of described transmitting terminal emission and the noise signal of noise-producing equipment output, and this radiofrequency signal and noise signal carried out outputing to receiving terminal after the integration processing, and the output noise signal level of noise-producing equipment is greater than the space radiation signal level of transmitting terminal, the space radiation signal is flooded by noise signal like this, when one of them transmitting terminal during at emitting radio frequency signal, other receiving terminals that are not connected with this transmitting terminal will not receive the space radiation signal of this transmitting terminal, so the space radiation between transmitting terminal and the receiving terminal just can not have influence on the radiofrequency signal of transmitting terminal emission, and then just can be in short distance (as indoor) the networking characteristic between transmitting terminal and the receiving terminal is simulated and is verified, saved manpower and materials.
This shows, radio frequency network topology simulating apparatus of the present invention, noise signal level by control noise-producing equipment output is greater than the space radiation signal level of transmitting terminal, thereby when effectively preventing the transmitting terminal emitting radio frequency signal, other receiving terminals that are connected with this transmitting terminal do not receive the phenomenon of this transmitting terminal space radiation signal, and then can make the topological structure between transmitting terminal and the receiving terminal controlled, effectively realized in the radio-frequency channel networking characteristic between the Devices to test being simulated and being verified, for short-range topologic network simulation between transmitting terminal and the receiving terminal, provide one near real radio frequency analog environment.
For the big I of signal to noise ratio that makes the radiofrequency signal that receiving terminal receives is regulated automatically, analog machine of the present invention can also comprise control device, control device is connected with the input of noise-producing equipment, be used to control the noise signal level of noise-producing equipment output, the signal to noise ratio of the radiofrequency signal that the noise signal level adjustment receiving terminal that control device is exported by the control noise-producing equipment receives is controlled the break-make between transmitting terminal and the receiving terminal.In one embodiment, when the level of RF signals of one of them transmitting terminal emission during greater than the noise signal level, just can receive the radiofrequency signal of transmitting terminal emission with the receiving terminal that is connected by this transmitting terminal of first integral unit, this transmitting terminal just and this receiving terminal be in on-state; Otherwise, when the level of RF signals of transmitting terminal emission during less than the noise signal level, receiving terminal just can not receive transmitting terminal emission radiofrequency signal, and then just can realize in short distance that the networking between a plurality of transmitting terminals and a plurality of receiving terminal simulates connection, saved manpower and materials.Wherein control device can be controlled the size of noise signal level according to actual needs, above-mentioned said noise signal level is greater than the space radiation signal level of transmitting terminal and noise signal level, and to be greater than or less than level of RF signals be a kind of concrete application scheme, can also control noise signal level size as the case may be in actual applications.
As indicated above, the present invention utilizes noise-producing equipment to insert noise signal on the interface of receiving terminal, and can also control the noise signal level by control device, promptly the mode by the control signal to noise ratio is submerged in space radiation in the noise, exists the problem that space radiation is disturbed thereby solved Devices to test (as the radio station) when short-distance networking is verified.Because the solution route that the present invention provides the space radiation between a plurality of Devices to tests in short distance to disturb by the foregoing description, therefore in a preferred embodiment, the present invention can be applied to indoor networking characteristic between a plurality of radio station be simulated and verified, thus when efficiently solving the simplation verification of the networking characteristic of in short distance, doing between a plurality of radio station because the existence of space radiation and the difficult problem that can't verify according to the topology that sets in advance between the equipment.
Described noise-producing equipment is used for the output noise signal, this noise-producing equipment with noise source through amplification and variable attenuation after, can form the noise signal of varying level, output to first integral unit of described first radio frequency handling device.Be illustrated in figure 2 as the circuit diagram among noise-producing equipment one embodiment, this noise-producing equipment can be exported 16 tunnel noise signals, it comprises that (the 1 tunnel is input to 17 logical splitters, 16 the tunnel is output), a plurality of fixedly amplifiers, voltage-controlled attenuator and fixedly amplifier and control unit, noise source is passed through fixedly amplifier successively, voltage-controlled attenuator, fixing amplifier, 17 logical splitters are divided into 16 tunnel noise signals, this 16 tunnel noise signal is passed through fixedly amplifier more respectively successively, voltage-controlled attenuator, isolated amplifier and control switch are exported, wherein control unit is respectively applied for control voltage-controlled attenuator and control switch, and noise source and control unit are by the power supply of 12V power supply.
In one embodiment, described first radio frequency handling device also comprises first switch element and first regulon, the break-make control signal that described first switch element is exported according to described control device is controlled the break-make between transmitting terminal and the receiving terminal, because when first switch element disconnects, still the radiofrequency signal that has the emission of part transmitting terminal sends to receiving terminal, level of RF signals that described receiving terminal received when so described noise signal level was opened greater than described first switch element, the level of RF signals that described receiving terminal receives when closing less than described first switch element can be controlled the break-make between described transmitting terminal and the receiving terminal to guarantee described first switch element; Described first regulon is regulated the radiofrequency signal that receives according to the level controling signal of described control device output, can regulate the radiofrequency signal of transmitting terminal emission by first regulon, the signal to noise ratio of the radiofrequency signal that receives with the control receiving terminal can provide near real radio frequency JA(junction ambient).
This shows, control first regulon and first switch element by control device, control described first switch element for closing or during off-state at control device, described control device can be controlled described first regulon level of RF signals that receives is regulated, and can also regulate the noise signal level of noise-producing equipment output; When first switch element was closed, level of RF signals was greater than the noise signal level, and transmitting terminal and receiving terminal are in connection status in radio-frequency channel; When first switch element disconnected, level of RF signals was less than the noise signal level, and transmitting terminal and receiving terminal are in off-state in radio-frequency channel.And then the signal to noise ratio of the radiofrequency signal that receives of the described receiving terminal of control that can be convenient, for the networking feature between a plurality of transmitting terminals and a plurality of receiving terminal is simulated and checking provides means more easily.
Analog machine of the present invention can also comprise the detection protective circuit; radiofrequency signal to the transmitting terminal emission detects; as shown in Figure 3; be connected between described transmitting terminal and described first radio frequency handling device; in one embodiment; whether can be used to detect the watt level of described radiofrequency signal greater than predetermined value; when the power that detects described radiofrequency signal during greater than predetermined value; described detection protective circuit disconnects being connected between described transmitting terminal and first radio frequency handling device; can play the effect of protection like this to the circuit arrangement of back analog machine, in case the high-power RF signal burns out circuit arrangement.Described in addition detection protective circuit is at the power that detects radiofrequency signal during greater than predetermined value; also can arrive described control device by the outputting alarm signal; control described first switch element by described control device and disconnect connection between transmitting terminal and the receiving terminal; thereby make transmitting terminal and receiving terminal in radio-frequency channel, be in off-state, so also can play a protective role circuit arrangement.Analog machine of the present invention in addition can also comprise warning device; be connected with described detection protective circuit; the power that detects described radiofrequency signal when described detection protective circuit is during greater than predetermined value; described detection protective circuit disconnects being connected between described transmitting terminal and first radio frequency handling device on the one hand; the output alarm control signal is to described warning device on the other hand; described warning device sends sound and light alarm according to this alarm control signal; the operator can take necessary safeguard measure according to this sound and light alarm, has realized further circuit arrangement is protected.
Because transmitting terminal and the randomly topologically structured of receiving terminal are very complicated, after transmitting terminal of connecting and the change how of the radio-frequency channel path between the receiving terminal, can bring crosstalking between the signal, had a strong impact on the networking verification the verifying results, the present invention has designed the scheme of topological simplification for this reason, as described in following embodiment.
Analog machine of the present invention can also comprise signal deteching circuit, as shown in Figure 4, the one end is connected with transmitting terminal, the other end is connected with first switch element in described first radio frequency handling device, be used to detect transmitting terminal and have or not emitting radio frequency signal, export first control signal to described first switch element, described first switch element is controlled break-make between described transmitting terminal and the receiving terminal according to the break-make control signal of this first control signal and control device 4.That is to say that the radio frequency connection status between transmitting terminal and the receiving terminal is subjected to the influence that transmitting terminal has or not the control signal of emitting radio frequency signal and control device; Have only the transmitting terminal of working as that emitting radio frequency signal is arranged, and when the control signal of control device was on-state, the path between transmitting terminal and the receiving terminal just really was switched on.When two radio station (be transmitting terminal be again receiving terminal) connects by first radio frequency handling device, can have two same signal deteching circuits also can be connected to reaches between another radio station and first radio frequency handling device between one of them radio station and first radio frequency handling device, be respectively applied for two radio station of detection and have or not emitting radio frequency signal, it exports first control signal to described first switch element respectively, described first switch element is controlled break-make between described two radio station according to the break-make control signal of this first control signal and control device 4, emission signal is frequently only arranged at least one radio station, and under the control closed condition of control device, the path between the radio station is just really connected.
In one embodiment, because will carry out the transmitting terminal and the receiving terminal of networking simulation has a lot, analog machine of the present invention also can comprise a plurality of first radio frequency handling devices, and wherein any radio frequency handling device is identical with above-mentioned said radio frequency handling device, does not give unnecessary details at this.Analog machine as shown in Figure 5 comprises 3 radio frequency handling devices, is connected between transmitting terminal 1 and the receiving terminal 2, between transmitting terminal 3 and the receiving terminal 4, between transmitting terminal 5 and the receiving terminal 6.The noise signal of noise-producing equipment output outputs to 3 radio frequency handling devices respectively, and control device is respectively applied for control noise-producing equipment and 3 radio frequency handling devices.Certainly can also be between the radio frequency handling device of each transmitting terminal and corresponding connection with it joint detection protective circuit; and be connected with signal deteching circuit at each transmitting terminal; this detects protective circuit and signal deteching circuit and above-mentioned said identical, does not give unnecessary details at this.
In one embodiment, in order to realize networking simulation to the full-duplex mode between the radio station A that is connected these analog machine two ends and the radio station B (be transmitting terminal be again receiving terminal), be that radio station A can be by analog machine emitting radio frequency signal of the present invention to radio station B, radio station B also can be by analog machine emitting radio frequency signal of the present invention to radio station A, as shown in Figure 6, described analog machine comprises first radio frequency handling device, second radio frequency handling device, noise-producing equipment and control device, described first radio frequency handling device is connected with radio station A, comprise first integral unit, first switch element and first regulon, described first switch element is connected with described control device, be used for according to the break-make between two radio station of break-make control signal control of described control device, an input of described first regulon is connected with the output of described first integral unit, level controling signal according to the output of described control device is regulated the signal of described first integral unit output, and another input is connected with described control device.Described second radio frequency handling device comprises second integral unit, second regulon that is connected with described first regulon and the second switch unit that is connected with described control device, and described second switch unit is according to the break-make between two radio station of break-make control signal control of described control device; Described second regulon receives the output signal of described first regulon, and output to described second integral unit, described second integral unit receives described output signal, and receive the noise signal of described noise-producing equipment output, carry out outputing to after the integration processing receiving terminal of described radio station B.Wherein when radio station A serves as transmitting terminal, radio station B serves as receiving terminal, first integral unit in first radio frequency handling device receives the radiofrequency signal of radio station A emission and the noise signal of noise-producing equipment output, outputs to second regulon in second radio frequency handling device after carrying out after the integration processing regulating through the signal level size of described first regulon after to integration processing again; Output to second integral unit after second regulon is regulated to the received signal, second integral unit receives the noise signal of noise-producing equipment output, will output to radio station B after signal after regulating and the noise signal integration processing.When radio station A serves as receiving terminal, radio station B serves as transmitting terminal, second integral unit of second radio frequency handling device receives the radiofrequency signal of radio station B emission and the noise signal of noise-producing equipment output, output to first regulon in first radio frequency handling device after carrying out after the integration processing again regulating through the signal level size of second regulon after to its integration processing, output to first integral unit after regulating to the received signal by first regulon, first integral unit receives the noise signal of noise-producing equipment output, will output to radio station A after signal after regulating and the noise signal integration processing.Certainly this analog machine also can comprise many groups of first radio frequency handling devices that are connected like this and second radio frequency handling device, can realize many networking simulations to the full-duplex mode between the radio station like this.
Pass through the foregoing description, the invention provides realization and many Devices to tests (as the radio station) are carried out the scheme of networking simplation verification in short distance, the present invention can also further improve the various embodiments described above, to realize that the networking characteristic between any two Devices to tests (as the radio station) is carried out networking and checking, elaborate by following examples.
In order to realize the networking simulation between any radio station, analog machine of the present invention also comprises the radio frequency cable terminal box, described first radio frequency handling device comprises first series arm that multirouting first regulon and first switch element compose in series, this first series arm comprises multi-channel output and one road input, and its input is connected with described first integral unit; Described second radio frequency handling device comprises second series arm that described second regulon of multirouting and described second switch unit compose in series, this second series arm comprises multi-channel input and one road output, and its output is connected with described second integral unit; An output of first series arm is connected by an output of described radio frequency cable terminal box and other first series arms or an input of second series arm; An input of described second series arm is connected by an input of described radio frequency cable terminal box and other second series arms or an output of first series arm, make between a plurality of first radio frequency handling devices and a plurality of second radio frequency handling device by described radio frequency cable terminal box realize connecting in twos and a plurality of first radio frequency handling device between connect in twos and a plurality of second radio frequency handling device between connect in twos, can realize the simulation of topological structure networking arbitrarily by analog machine of the present invention between a plurality of like this radio station.Can also control each first switch element and second switch unit by control device in addition, can control the topologic network simulation between the radio station so dynamically.
Below in conjunction with particular circuit configurations the present invention is done a detailed explanation.
As shown in Figure 7, radio frequency network topology simulating apparatus of the present invention comprises noise-producing equipment 2 and radio frequency handling device, wherein radio frequency handling device comprises mixer 1, mixer 1 is connected (A and B represent the radio station among the figure) between 2 radio station, the output of noise-producing equipment 2 is connected with mixer 1, wherein output to radio station B after the radiofrequency signal of radio station A emission and described noise signal process mixer 1 integration processing, and the output noise signal level of noise-producing equipment 2 is greater than radio station A, space radiation signal level between the B, the space radiation signal is flooded by noise signal like this, so the space radiation between the radio station just can not have influence on the radiofrequency signal of radio station emission, and then just can in indoor or short distance, realize networking simulation between a plurality of radio station, saved manpower and materials.
This shows, radio frequency network topology simulating apparatus of the present invention, noise signal level by control noise-producing equipment output is greater than the space radiation signal level between the radio station, in the time of can effectively preventing one of them radio station emitting radio frequency signal, other radio station that are connected with this radio station do not receive the phenomenon of this transmitting terminal space radiation signal, and then can make the topological structure between the radio station controlled, effectively realized in the radio-frequency channel networking characteristic between the radio station being simulated and being verified, for short-range topologic network simulation between the radio station, provide one near real radio frequency analog environment.
Noise-producing equipment 2 is used for the output noise signal, after this noise-producing equipment passes through amplification and variable attenuation with noise source, can form the noise signal of varying level, if a plurality of mixers are arranged, noise-producing equipment can output to each mixer respectively just produce the multipath noise signal after along separate routes.
The radio frequency of controlling for convenience between the radio station connects, and radio frequency handling device of the present invention also comprises radio-frequency (RF) switch 3, and the one end is connected with mixer 1, and the other end is connected with radio station B; The radio frequency that just can control between radio station A, the B by radio-frequency (RF) switch 3 connects.Wherein when radio-frequency (RF) switch 3 is opened, because radio-frequency (RF) switch 3 can not disconnect the connection between the radio station fully, the level of RF signals that the radio station when the noise signal level of described noise-producing equipment 2 outputs is disconnected greater than this radio-frequency (RF) switch 3 receives; When radio-frequency (RF) switch 3 was closed, described noise signal level was less than the level of RF signals that the radio station receives, and so just can realize the networking simulation between the radio station.
Radio frequency handling device of the present invention can also comprise variable attenuator 5, described analog machine also comprises control device 4, variable attenuator 5 is connected between radio-frequency (RF) switch 3 and the mixer 1, described control device 4 is used to receive operator's input information, and control the noise signal level of shutoff, noise-producing equipment 2 outputs of described radio-frequency (RF) switch 3 and the size of variable attenuator 5 according to input information, realized the automation control of analog machine, and then can be so that can simulate between radio station A, the B near real radio frequency JA(junction ambient).
In addition variable attenuator 5 as required also can with described radio-frequency (RF) switch 3 transpositions, promptly described radio-frequency (RF) switch 3 is connected with mixer 1, variable attenuator 5 is connected with radio-frequency (RF) switch.
From the above mentioned, control the break-make of radio-frequency (RF) switch 3 and control described noise signal level size by control device, the signal to noise ratio of the radiofrequency signal that control radio station that can be indirect receives, make that further the topological syndeton between the radio station is controlled, can provide more effectively means for the networking simulation between the convenient checking radio station.
As shown in Figure 8, burn out the circuit arrangement of back for the high-power RF signal that prevents the radio station emission, analog machine of the present invention also comprises detection protective circuit S1, the one end is used for being connected with radio station A, the other end is connected with described radio frequency handling device S2, and the radiofrequency signal that radio station A is launched detects; In one embodiment; described detection protective circuit comprises coupler 6; protection switch 7 and the power detection branch road that composes in series by power detector 1 and comparator 1; one end of coupler 6 is connected with the radio station; the other end is connected with the power detection branch road with protection switch 7 respectively; the power detection branch road is connected between coupler 6 and the protection switch 7; (power of described radiofrequency signal is during greater than the set point in the comparator when detecting described radiofrequency signal and be high-power signal; described radiofrequency signal is a high-power signal); described protection switch 7 disconnections are connected with radio frequency handling device, circuit are played the effect of protection.In one embodiment; described protection testing circuit can also comprise load circuit 8, is connected with described protection switch 7, when the described radiofrequency signal of detection is high-power signal; described protection switch 7 disconnections are connected with radio frequency handling device, are connected with described load circuit 8 simultaneously.In another embodiment; protection switch 7 in the described detection protective circuit also can save; described coupler 6 directly is connected between described radio frequency handling device and the described radio station; power checks that branch road is connected between coupler and the control device 4; when detecting the high-power RF signal; be that the power of described radiofrequency signal is during greater than predetermined value; described power detection branch road outputting alarm signal is given described control device 4; the described radio-frequency (RF) switch 3 of described control device 4 controls disconnects and connecting, thereby the circuit of back is played the effect of protection.Between radio-frequency (RF) switch 3 and protection testing circuit, can also be connected with amplitude limiter, between noise-producing equipment and mixer, can also be connected with resistance 9 and isolated amplifier, the noise signal of noise-producing equipment output is filtered and current limliting.
Because randomly topologically structured between the radio station is very complicated, after how the radio-frequency channel path between the radio station of connecting becomes, can bring crosstalking between the signal, had a strong impact on the networking verification the verifying results, the present invention has designed the scheme of topological simplification for this reason, as described in following embodiment.
Analog machine of the present invention can also include the signal deteching circuit that power detector 2 and comparator 2 compose in series, the one end is connected with radio station A, the other end is connected with radio-frequency (RF) switch 3, be used to detect the radio station and have or not emitting radio frequency signal, to described radio-frequency (RF) switch 3 output break-make control signals, the radio-frequency (RF) switch 3 among the described radio frequency handling device S2 is controlled connection between described radio station A, the B according to the level controling signal of this break-make control signal and control device 4.That is to say that the radio frequency connection status between two radio station is subjected to the influence that the radio station has or not the control signal of emitting radio frequency signal and control device; Have only when the radio station emitting radio frequency signal is arranged, and under level controling signal is controlled to be on-state, the radio-frequency channel between two radio station just really is switched on.Can certainly comprise two same signal deteching circuits, the one end respectively with two radio station A, the B transmitting terminal connects, the other end is connected with radio-frequency (RF) switch 3 respectively, be respectively applied for and detect radio station A, B has or not emitting radio frequency signal, respectively to described radio-frequency (RF) switch 3 output break-make control signals, radio-frequency (RF) switch 3 among the described radio frequency handling device S2 is controlled described radio station A according to the level controling signal of this break-make control signal and control device 4, connection between the B, only there is emitting radio frequency signal in such two radio station at least one radio station, and under control device was controlled to be closing state, the radio-frequency channel between two radio station just was in real on-state.
Pass through the foregoing description, the invention provides the scheme of in short distance, the networking characteristic between a plurality of radio station being simulated and being verified, the present invention can also further improve the various embodiments described above, with realization the networking characteristic between any two radio station is simulated and verified, and make things convenient for the networking simulation of carrying out randomly topologically structured shape between the radio station, elaborate by following specific embodiment.
Be the electrical block diagram of a specific embodiment of the present invention as shown in Figure 9, in this is implemented, analog machine comprises control device, noise-producing equipment, 4 radio frequency handling devices, radio frequency cable terminal box and 4 radio station, and by power supply this analog machine is powered.4 radio station C, D, E, F respectively with 4 radio frequency handling device C1, D1, E1, F1 connects, control device is connected with noise-producing equipment with radio frequency handling device respectively, radio frequency handling device C1 wherein, D1, E1, F1 comprises the switching branches that mixer and three route radio-frequency (RF) switch and variable attenuator compose in series respectively, one end of these switching branches connects in twos by the radio frequency cable terminal box, guarantee that the switching branches in three radio frequency handling devices of three-way switch branch road and other in any radio frequency handling device wherein is connected, like this by the analog machine among this embodiment, radio station C, radio station D, radio station E links to each other respectively in twos with radio station F, can set up into various topology network architectures as required, such as stelliform connection topology configuration, ring topology, chain type topological structure.The other end of switching branches is connected with the radio station by mixer like this, the output of noise-producing equipment is connected with the mixer of radio frequency handling device respectively, and control device is used for shutoff, the size of variable attenuator and the size of noise-producing equipment output noise level according to operator's input information control radio-frequency (RF) switch.The radiofrequency signal that send in one of them radio station outputs to another radio station through mixer and a switching branches of the mixer of one of them radio frequency handling device and switching branches, radio frequency cable terminal box, another radio frequency handling device respectively.Also can between each radio station and coupled radio frequency handling device, be connected with the detection protective circuit, whether be used to detect the radiofrequency signal power of radio station emission greater than predetermined value, if greater than predetermined value, described detection protective circuit can disconnect being connected between radio station and the radio frequency handling device, radio frequency handling device is played the effect of protection; Can also comprise a warning device that is connected respectively with the detection protective circuit; when described detection protective circuit detects radiofrequency signal power greater than predetermined value; disconnect on the one hand being connected between radio station and the radio frequency handling device; the output alarm control signal is to described warning device on the other hand, and described warning device sends sound and light alarm according to this alarm control signal.Described in addition detection protective circuit also can output to control device by the outputting alarm signal, goes to control corresponding radio-frequency (RF) switch by control device and disconnects connection.
Radio station C can be connected with radio station D, E, F like this, and promptly any one radio station can go to other radio station to connect, and the radio station can form the topological syndeton of any needs by the analog machine among this embodiment.Control device can be controlled radio-frequency (RF) switch and the variable attenuator that connects between any two radio station and control the noise signal level of described noise-producing equipment output, promptly the noise of the radiofrequency signal that receives greater than the space radiation signal level between the radio station and control radio station by control noise signal level controls indirectly recently that the break-make in radio-frequency channel connects between these two radio station, between a plurality of radio station in short distance (for example indoor) realize that the networking simplation verification in the radio-frequency channel provides one near real radio frequency JA(junction ambient).
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.
Claims (13)
1. a radio frequency network topology simulating apparatus is used for the networking characteristic between at least one transmitting terminal and at least one receiving terminal is simulated and verified, it is characterized in that, comprising:
Noise-producing equipment, at least one first radio frequency handling device that is connected with described noise-producing equipment output; Described first radio frequency handling device comprises first integral unit, is used to receive the radiofrequency signal of described transmitting terminal and the noise signal of described noise-producing equipment output, carries out outputing to described receiving terminal after the integration processing; Wherein, the noise signal level of described noise-producing equipment output is greater than the space radiation signal level of described transmitting terminal, less than the level of RF signals of described transmitting terminal emission;
The control device that links to each other respectively with described noise-producing equipment and described first radio frequency handling device, the signal to noise ratio of the radiofrequency signal that receives by the described receiving terminal of noise signal level adjustment of controlling the output of described noise-producing equipment is controlled described transmitting terminal and the receiving terminal break-make in radio-frequency channel;
When described noise signal level during less than described level of RF signals, the signal to noise ratio height of the radiofrequency signal that described receiving terminal receives, described transmitting terminal and receiving terminal are connected; When described noise signal level during greater than described level of RF signals, the signal to noise ratio of the radiofrequency signal that described receiving terminal receives is low, and described transmitting terminal disconnects with receiving terminal and being connected.
2. radio frequency network topology simulating apparatus according to claim 1 is characterized in that: also comprise the detection protective circuit, it is connected between described transmitting terminal and described first radio frequency handling device, and the radiofrequency signal that described transmitting terminal is launched detects; When the power that detects described radiofrequency signal during greater than predetermined value, described detection protective circuit disconnects being connected between described transmitting terminal and described first radio frequency handling device.
3. radio frequency network topology simulating apparatus according to claim 2 is characterized in that:
Also comprise warning device, be connected with described detection protective circuit; The power that detects described radiofrequency signal when described detection protective circuit is during greater than predetermined value, and described detection protective circuit is sent alarm control signal to described warning device, and described warning device sends sound and light alarm according to this alarm control signal.
4. radio frequency network topology simulating apparatus according to claim 1, it is characterized in that: described first radio frequency handling device also comprises first switch element and first regulon, and described first switch element is used for controlling described transmitting terminal according to the break-make control signal of described control device and is connected with break-make between the receiving terminal; The input of described first regulon is connected with described control device and described transmitting terminal, output is connected with described first integral unit, and described first regulon is regulated the radiofrequency signal of described transmitting terminal according to the level controling signal of the output of described control device;
When described control device is controlled described first regulon and is connected, the level of RF signals that described noise signal level receives less than described receiving terminal; Control described first regulon when described control device and disconnect when connecting the level of RF signals that described noise signal level receives greater than described receiving terminal.
5. radio frequency network topology simulating apparatus according to claim 4 is characterized in that:
Also comprise the detection protective circuit, be connected between described transmitting terminal and described first radio frequency handling device, the radiofrequency signal of described transmitting terminal is detected; When the power that detects described radiofrequency signal during greater than predetermined value, described detection protective circuit outputting alarm signal is to described control device, and described control device is controlled described first switch element according to this alarm signal and disconnected and connecting.
6. according to claim 4 or 5 described radio frequency network topology simulating apparatus, it is characterized in that:
Also comprise signal deteching circuit, be connected with described transmitting terminal, detect described transmitting terminal and have or not emitting radio frequency signal, and send first control signal to described first switch element, described first switch element is connected according to the break-make control signal closure or the disconnection of described first control signal and described control device, comprise that specifically when transmitting terminal had emitting radio frequency signal and described break-make control signal to be on-state, described first switch element is closed to be connected.
7. radio frequency network topology simulating apparatus according to claim 1 is characterized in that:
Described first radio frequency handling device also comprises first switch element and first regulon, described first switch element is used for controlling break-make between described transmitting terminal and the receiving terminal according to the break-make control signal of described control device, an input of described first regulon is connected with the output of described first integral unit, level controling signal according to the output of described control device is regulated the signal of described first integral unit output, and another input is connected with described control device;
At least one second radio frequency handling device that is connected with described noise-producing equipment, described second radio frequency handling device comprises second integral unit, second regulon that is connected with described first regulon and the second switch unit that is connected with described control device, and the break-make of described transmitting terminal and described receiving terminal is controlled in described second switch unit according to the break-make control signal of described control device;
Described second regulon receives the output signal of described first regulon, and output to described second integral unit, described second integral unit receives described output signal, and receives the noise signal of described noise-producing equipment output, carries out outputing to described receiving terminal after the integration processing.
8. radio frequency network topology simulating apparatus according to claim 7, it is characterized in that: also comprise the radio frequency cable terminal box, described first radio frequency handling device comprises first series arm that multichannel serial connection branch road is formed, each road serial connection described first regulon of route and described first switch element compose in series, described first series arm comprises an input and at least one output, and the input of described first series arm is connected with described first integral unit; Described second radio frequency handling device comprises second series arm that multichannel serial connection branch road is formed, each road serial connection described second regulon of route and described second switch unit compose in series, described second series arm comprises at least one input and an output, and the output of described second series arm is connected with described second integral unit; An output of described first series arm is connected by an output of described radio frequency cable terminal box and other first series arms or an input of second series arm; An input of described second series arm is connected by an input of described radio frequency cable terminal box and other second series arms or an output of first series arm.
9. radio frequency network topology simulating apparatus according to claim 7, it is characterized in that: described first integral unit or second integral unit are mixer, described first switch element or second switch unit are radio-frequency (RF) switch, and described first regulon or second regulon are variable attenuator.
10. radio frequency network topology simulating apparatus according to claim 2; it is characterized in that: described detection protective circuit comprises coupler, protection switch, power detector and comparator; the input of described coupler is connected with described transmitting terminal; one of them output is connected with described first radio frequency handling device by protection switch, and another output is connected with protection switch with comparator by power detector successively.
11. radio frequency network topology simulating apparatus according to claim 5; it is characterized in that: described detection protective circuit comprises coupler, power detector and comparator; the input of described coupler is connected with described transmitting terminal; one of them output is connected with described first radio frequency handling device, and wherein another output is connected with described control device with comparator by described power detector successively.
12. radio frequency network topology simulating apparatus according to claim 6, it is characterized in that: described signal deteching circuit comprises the power detector and the comparator of series connection, one end of described power detector is connected with described transmitting terminal, and the other end is connected with described first switch element by described comparator.
13. radio frequency network topology simulating apparatus according to claim 7, it is characterized in that: described first radio frequency handling device comprises first radio-frequency (RF) switch, first variable attenuator, first mixer, and described second radio frequency handling device comprises second radio-frequency (RF) switch, second variable attenuator, second mixer;
The input of described first mixer is connected with described transmitting terminal and described noise-producing equipment, output connects by the input that first radio-frequency (RF) switch, first variable attenuator, second variable attenuator, second radio-frequency (RF) switch that is connected successively is connected with described second mixer respectively, another input of second mixer is connected with described noise-producing equipment, and output is connected with described receiving terminal.
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| CN2008100287398A CN101291183B (en) | 2008-06-12 | 2008-06-12 | Radio frequency network topology simulating apparatus |
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| CN102457336A (en) * | 2010-10-27 | 2012-05-16 | 中兴通讯股份有限公司 | Channel simulation device and method |
| CN103874079A (en) * | 2012-12-14 | 2014-06-18 | 中国电子技术标准化研究院 | Network topology control method in short-range wireless network |
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