CN101317336A - Communication apparatus and communication method - Google Patents

Abstract

A communication apparatus in which only a terminal having a specific positional relationship can perform communication through a relatively simple arrangement. When initial setting is performed or communication is started, a timing calculating section (104) calculates a time difference corresponding to the difference between a path from an antenna (101) to a terminal (200) and a path from an antenna (102) to the terminal (200), based on a transmission signal from the antenna (101) and a reflection signal provided by having the transmission signal reflected from the antenna (102) or a communication partner, i.e. the terminal (200), and returned back to the antenna (101). Based on the time difference thus calculated, the timing calculating section (104) outputs a signal for regulating the transmission timing of transmission data from the antenna (101) to a variable delay unit (105). The variable delay unit (105) delays transmission timing of the transmission data depending on the timing regulation signal and outputs the delayed transmission data to a modulating/demodulating section (106).

Description

Communicator and communication means

Technical field

The present invention relates to communicator and communication means, relate in particular to the communicator and the communication means that only specific zone are set at the zone that can communicate.

Background technology

In recent years, development along with wireless technology, be the mode of utilizing of transmission representative, carry out the less content of the such capacity of voice and mail at the communication zone of broad not only, also popularizing WLAN (LocalAreaNetwork: such mode of utilizing of in narrow communication zone, carrying out high-speed communication local area network (LAN)) popularizing with the mobile phone.

And, except improving transmission rate, also in that only popularize will (Dedicated ShortRange Communication: Dedicated Short Range Communications) the extremely limited place (narrow band communication) (being specific place) as communication zone, and only makes the mode of utilizing that the user that is positioned at specific place can communicate as DSRC.

Can predict and to popularize the mode of utilizing that jumbo content is downloaded at short notice the entrained or vehicle-mounted terminal of user from now on, and it is contemplated that in the jumbo like this content and comprise a large amount of personal information, and if, then it is contemplated that the content of this content for charge such as the presentation content of film etc.

If attempt to consider such situation from now on, can consider to improve more: only realize and between the other side in specific place, carry out communicating by letter of high-speed high capacity energetically to the demand of setting up of following communication system.

As only with the example in the past that is positioned at specific place to the communication system that can communicate, expression is used for explanation at ETC (ElectronicTollCorrectionSystem: the concept map of the implementation method of communication zone E-payment system) in Fig. 1 to Fig. 3.In Fig. 1 to Fig. 3, near the situation the vehicle 12-2 arrival antenna of considering to have loaded the vehicle 12-1 of the first terminal 11-1 and loaded the second terminal 11-2 14, described antenna 14 is connected to the radio-cell 13 of communication counterpart.

As shown in Figure 1, the antenna 14 that user tropism is more weak and making under the situation of regional AR1 that communicates of radio-cell 13 than broad, because the first terminal 11-1 begins to communicate by letter with radio-cell 13 with the second terminal 11-2, so the situation that situation that situation about can crosstalk, both sides all can not be communicated by letter and incoherent terminal can receive information data.

On the other hand, as shown in Figure 2, the antenna 14 that user tropism is stronger and making under the narrow situation of the regional AR2 that communicates of radio-cell 13, owing to when the translational speed of vehicle is very fast, can not guarantee enough call duration times, so thereby need make vehicle deceleration or parking guarantee call duration time.

In order to address these problems, as shown in Figure 3, in patent documentation 1, disclose by using switched beam antennas, formed according to first party tropism's the regional AR3 that communicates with according to the technology of second party tropism's the regional AR4 that communicates as antenna 14.Can think that if adopt said method, even in the translational speed of vehicle faster under the situation, terminal 11-1 and 11-2 also can both communicate the both sides of regional AR3 that can communicate and AR4 and not crosstalk.

Patent documentation 1: the flat 11-185083 communique of Japanese Patent Application Laid-Open

Summary of the invention

The problem that invention will solve

Yet, in patent documentation 1 described structure in the past, because in order to realize that the narrower zone that communicates needs the antenna of high directivity, so existence can cause the problem of the maximization of antenna.In addition, though also carry out widening the zone that can communicate by switching direction, but owing to needing mechanical direction switching or synthesizing by the phase place that the phase control in carrier frequency band is carried out, so can cause being used to the maximization of equipment of the mobility of the equipment of realizing, cost also rises.Moreover, also existing in order to realize high-precision phase control, control unit produces expensive problem.

The object of the present invention is to provide communicator and communication means, with simpler structure only make and communicator between be in certain location relation terminal installation can communicate.

The scheme of dealing with problems

In order to solve the above problems, the structure that communicator of the present invention adopts possesses: first generation unit, and concatenate into first based on information data and send signal; Second generation unit generates second and sends signal, and described second sends signal passes through to send signal combination with predetermined timing and described first, but can make the demodulation of described information data string; First antenna is used to send described first and sends signal; Second antenna is used to send described second and sends signal; Time difference calculating unit, computing time is poor, and the described time difference is the time difference that transmitted a signal to described first time and described second that transmits a signal to the zone of Da Teding between the time that reaches described specific zone; And adjustment unit, based on the described time difference, described first transmission that sends at least one side of signal and the described second transmission signal is regularly adjusted, arrived described specific zone with predetermined timing so that the described first transmission signal and described second sends signal.

According to this structure, since be made as based on send by first transmitting antenna first to transmit a signal to time and time of advent of transmitting a signal to by second of second antenna transmission between time in zone of Da Teding in zone of Da Teding poor, make the first transmission signal and the second transmission signal arrive predetermined zone with predetermined timing by two antenna transmission, can use the first transmission signal and second of concatenating to send signal and the information data string is carried out demodulation so only be positioned at the communication counterpart in specific zone, thereby the area limiting that can communicate with simpler structure is extremely limited zone based on information data.

The invention effect

According to the present invention, communicator and communication means can be provided, with simpler structure the terminal installation that is in certain location relation with communicator can be communicated.

Description of drawings

Fig. 1 is the figure that is used for illustrating the communication zone of the ETC under the situation of having used non-directional antenna;

Fig. 2 is the figure that is used for illustrating the communication zone of the ETC under the situation of having used directive antenna;

Fig. 3 is the figure that is used for illustrating the communication zone of the ETC under the situation of having used beam antenna;

Fig. 4 is the block diagram of structure of major part of the communicator of expression embodiment of the present invention 1;

Fig. 5 is the communicator of the execution mode 1 when being illustrated in initial setting and the figure that concerns as the position between the communication partner terminal;

Fig. 6 is the communicator of the execution mode 1 when being illustrated in the communication beginning and the figure that concerns as the position between the communication partner terminal;

Fig. 7 is illustrated in the communicator of the execution mode 1 after the communication and as the figure of the relation of the position between the communication partner terminal;

Fig. 8 is the block diagram of the timing computing unit of execution mode 1;

Fig. 9 is that the transmission timing of the expression first transmission signal, the first transmission signal is turned back to first antenna by second antenna-reflected timing and first send signal is turned back to the timing of first antenna by end reflection figure;

Figure 10 is used for illustrating that the timing of execution mode 1 adjusts the generation method flow diagram of signal;

Figure 11 is the block diagram of structure of major part of the communicator of expression execution mode 1;

Figure 12 is expression direct wave and the arrival figure regularly that postpones ripple;

Figure 13 is the figure that is used for illustrating the intersymbol interference that is caused by the delay ripple;

Figure 14 is used for illustrating the figure that is used to avoid by the timing adjusting method that postpones the intersymbol interference that ripple causes;

Figure 15 is the block diagram of structure of major part of the communicator of expression embodiment of the present invention 2;

Figure 16 is the block diagram of structure of major part of the communicator of expression execution mode 2;

Figure 17 is the figure that first and second of expression embodiment of the present invention 3 sends the timing of signal;

Figure 18 is the block diagram of structure of major part of the terminal of expression execution mode 3;

Figure 19 is the block diagram of structure of major part of the terminal of expression execution mode 3;

Figure 20 is that first and second of expression execution mode 3 sends the timing of signal and sends the figure of the correlated results between the signal at first and second;

Figure 21 is that first and second of expression execution mode 3 sends the timing of signal and sends the figure of the correlated results between the signal at first and second;

Figure 22 is the block diagram of structure of major part of the terminal of expression execution mode 3;

Figure 23 is the figure of timing, template signal and the correlated results between first to the 3rd transmission signal and template signal of first to the 3rd transmission signal of expression execution mode 3;

Figure 24 is the block diagram of structure of major part of the terminal of expression execution mode 3;

Figure 25 is the figure that the timing and first and second of the first and second transmission signals of expression execution mode 3 sends the demodulating data of signals;

Figure 26 is the figure of the wireless system of expression one routine embodiment of the present invention 4;

Figure 27 be first and second of expression execution mode 4 send signals transmission regularly, the arrival that sends signals in first and second of primary importance regularly, the arrival that sends signals in first and second of the second place regularly and the regularly adjusted arrival figure regularly that sends signal in second of the second place;

Figure 28 is the figure of a routine wireless system of expression embodiment of the present invention 4; And

Figure 29 is the figure of a routine wireless system of expression embodiment of the present invention 5.

Embodiment

Be conceived to be in the zone of specific distance relation with the distance of each antenna of the communicator that possesses a plurality of antennas, be limited at extremely limited zone (being designated hereinafter simply as " specific zone "), if the present inventor considers a plurality of transmission signals by different antenna transmission, so that they arrive specific zone with predetermined timing, even then the antenna that user tropism is not stronger also can only make the terminal installation that is positioned at specific zone communicate with simpler structure, and finished the present invention, but described a plurality of transmission signal for example is the frame frame synchronizing signal regularly of information data and expression information data for by carrying out with predetermined timing in conjunction with a plurality of transmission signals that make the demodulation of information data string.

Below, with reference to accompanying drawing, specifically describe embodiments of the present invention.

(execution mode 1)

The structure of major part of representing the communicator of embodiment of the present invention 1 at Fig. 4.Communicator 100 shown in this figure possesses first antenna 101, second antenna 102 and radio-cell 103, and radio-cell 103 possesses regularly computing unit 104, variable delay device 105, first modem module 106 and second modem module 107.

In addition, Fig. 5, Fig. 6 and Fig. 7 are for having represented under each communications status from the figure of the situation in the path of the signal of each antenna transmission.The signal that sends from antenna 101 when Fig. 5 is illustrated in initial setting is by antenna 102 reflections, and the situation that is received by antenna 101.Fig. 6 is illustrated in when beginning communication and has inserted communication partner terminal 200 as communicator 100 between antenna 101 and antenna 102, and the transmission signal that sends from antenna 101 is by terminal 200 reflections, and by the situation of antenna 101 receptions.Fig. 7 is illustrated in communication beginning back and is received by terminal 200 respectively from the signal that antenna 101 and antenna 102 send, and the situation that is received by antenna 101 by the transmission signal that terminal 200 sends.

Antenna 101 and 102 will send to the opposing party's antenna or communication partner terminal 200 from the transmission signals of modem module 106 and 107 outputs, and the received signal that will arrive antenna 101 and 102 outputs to modem module 106 and 107 respectively.

Regularly computing unit 104 is when initial setting or during the communication beginning, based on the transmission signal and the reflected signal that send from antenna 101, calculating be equivalent to from antenna 101 to terminal 200 path and from antenna 102 to terminal time difference of the difference 200 the path, described reflected signal is described transmission signal is turned back to antenna 101 by antenna 102 or communication partner terminal 200 reflections a signal.For the details of the computational methods of time difference, will narrate in the back.In addition, regularly computing unit 104 generates regularly based on the time difference that calculates and adjusts signal, and will regularly adjust signal and output to variable delay device 105.

Variable delay device 105 makes the transmission constant time lag that sends data based on regularly adjusting signal, and the transmission data after will postponing output to modem module 106.

Modem module 106 and 107 pairs of adjusted transmission data of timing are carried out modulation treatment, and output to antenna 101 and 102.In addition, modem module 106 and 107 carries out demodulation process to received signal, and the reception data after the demodulation are outputed to regularly computing unit 104.In addition, receive the transmission signal that sends by terminal 200 though in Fig. 7, be made as antenna 101, and modem module 106 carries out demodulation process, but both can be made as antenna 102 receives, and modem module 107 carries out demodulation process, also can be made as antenna 101 and 102 both sides receive, and carry out demodulation process by modem module 106 and modem module 107 both sides.

Then, use Fig. 8 to further specify regularly computing unit 104.Fig. 8 is the regularly block diagram of the structure of the major part of computing unit 104 of expression.As shown in the drawing, regularly computing unit 104 possesses first variable delay device 301, second variable delay device 302, correlator 303, relevant identifying unit 304, time difference calculating unit 305, initial time difference memory cell 306 and differs from computing unit 307 time of advent.

Variable delay device 301 will send data delay and be equivalent to device specific time of delay.Particularly, device specific is meant time of delay, is equivalent to the time of the path difference between the system that system that antenna 101 connected and antenna 102 connected.

Variable delay device 302 postpone from the transmission data of variable delay device 301 outputs, and the transmission data after will postponing outputs to correlator 303 based on the value of the control signal of exporting from relevant identifying unit 304.

Correlator 303 carries out from the transmission data of variable delay device 302 output and the related operation that sends between data turn back to antenna 101 by antenna 102 or terminal 200 reflections the reflectance data, and operation result is outputed to the identifying unit 304 of being correlated with.

Relevant identifying unit 304 uses the related operation result to calculate the retardation that sends between data and the reflectance data.Particularly, judge whether the related operation result is more than the predetermined threshold value, and control signal is outputed to variable delay device 302, till the related operation result becomes more than the predetermined threshold value.In addition, relevant identifying unit 304 is based on the retardation in the operation result decision variable delay device 302, and control signal is outputed to time difference calculating unit 305, shown in control signal make and send data and in variable delay device 302, postpone the retardation that determined.

Time difference calculating unit 305 is based on calculating the time that has postponed to send data variable delay device 302 from the control signal of relevant identifying unit 304 outputs, just in the time difference that sends between data and the reflectance data.For example, under the situation of the control signal that has the amplitude level that is equivalent to retardation from relevant identifying unit 304 outputs, the amplitude level of time difference calculating unit 305 accumulative total control signals, thereby the time of delay in the calculating variable delay device 302.

In addition, time difference calculating unit 305 outputs to the time difference that calculates initial time difference memory cell 306 when initial setting, is outputed to difference computing unit 307 time of advent when the communication beginning time difference that calculates.In addition, the time difference that calculates when initial setting turns back to time (hereinafter referred to as " initial time is poor ") till the antenna 101 for the transmission data that send from antenna 101 by antenna 102 reflections.In addition, the time of the time difference that calculates in when beginning communication till turning back to antenna 101 for the transmission data that send from antenna 101 by terminal 200 reflections.

Poor when initial time difference memory cell 306 is stored in initial setting from the initial time of time difference calculating unit 305 output, and when the communication beginning, the initial time difference outputed to difference computing unit 307 time of advent.

Time of advent difference computing unit 307 uses when the communication beginning time difference from time difference calculating unit 305 outputs, the time and the above-mentioned initial time that just use the transmission data that send from antenna 101 to be turned back to by terminal 200 reflections till the antenna 101 are poor, and output is used for adjusting at variable delay device 105 the transmission timing regularly of the transmission data that send from antenna 101 and adjusts signal.

Particularly, the transmission data that the time of advent, 307 delays of difference computing unit sent from antenna 101, and signal is regularly adjusted in output, this adjust regularly that signal is equivalent to make the transmission data that send from antenna 101 and the transmission data that send from antenna 102 with the retardation of predetermined timing incoming terminal 200.For retardation, can for example use following formula (1) to calculate.In formula (1), T1 is that initial time is poor, and T2 turns back to required time till the antenna 101 for the transmission signal that sends from antenna 101 by terminal 200 reflections when having terminal 200.

Retardation=T1/2-T2... (1)

Then, with reference to the oscillogram of Fig. 9 A to Fig. 9 C and the flow chart of Figure 10, illustrate as above the communicator 100 that constitutes from initial setting the time action till beginning when the communication beginning.

At first, when initial setting, the time difference measuring usefulness data that are used to measure the initial time difference are sent to antenna 102 (ST101) via variable delay device 105, modem module 106 and antenna 101.As mentioned above, the initial time difference is equivalent to the distance between antenna 101 and antenna 102.In addition, when initial setting, time difference measuring is not delayed with data in variable delay device 105, and is output to modem module 106.

Then, modulated demodulating unit 106 carries out demodulation process (ST102) to the time difference measuring that is reflected by antenna 102 via antenna 101 with data, and the reflectance data after the demodulation is output to regularly computing unit 104.

Then, use data and, calculate initial time poor (T1) based on time difference measuring by timing computing unit 104 by the related operation result between the reflectance data of antenna 102 reflections.Particularly, make the time difference measuring data delay by variable delay device 302, till time difference measuring in the correlator in timing computing unit 104 303 becomes more than the predetermined threshold value with the related operation result between data and the reflectance data, based on the retardation in variable delay device 302, it is poor to calculate initial time by time difference calculating unit 305, and the initial time difference that calculates is stored in the initial time difference memory cell 306 (ST103).Measure regularly at Fig. 9 A express time, represent regularly by the reception of the reflectance data of antenna 102 reflections at Fig. 9 B with the transmission of data.

When the communication beginning, terminal 200 is inserted between antenna 101 and the antenna 102 (ST104), and via variable delay device 105, modem module 106 and antenna 101, time difference measuring is sent to terminal 200 (ST105) once more with data.Situation during with initial setting is same, and time difference measuring is not delayed in variable delay device 105 with data, and is output to modem module 106.

Then, the time difference measuring that is reflected by terminal 200 carries out demodulation process (ST106) with data by antenna 101 receptions and by modem module 106, and the reflectance data after the demodulation is output to regularly computing unit 104.

Then, and during initial setting similarly by timing computing unit 104 based on time difference measuring with data and come related operation computing time poor (T2) as a result between the reflectance data of self terminal 200, the time difference that calculates (T2) is stored in the difference computing unit 307 time of advent (ST107).That is to say that the retardation that has obtained the delayer 302 when relevant is to send electric waves from antenna 101, the propagation time till receiving once more by terminal 200 reflections and by antenna 101.Fig. 9 C represents the reception timing by the reflectance data of terminal 200 reflections.In addition, Fig. 9 C is the mensuration under the state of Fig. 7.

Then, the time of advent, difference computing unit 307 for example used initial time poor (T1) and time difference (T2) in above-mentioned formula (1), calculated and arrived the time difference.That is to say, calculate to result from and send to first of terminal 200 from antenna 101 to send time of advent of difference in the path between signal and the second transmission signal that sends to terminal 200 from antenna 102 poor.Then, consider to arrive the time difference, by the difference computing unit 307 further retardations that determine in the variable delay devices 105 time of advent,, and calculate the timing adjustment signal that is equivalent to retardation so that the first transmission signal and second sends signal with predetermined timing incoming terminal 200.Then, time of advent difference computing unit 307 will regularly be adjusted signal and output to variable delay device 105 (ST108).

Like this, determined that after the communication, by variable delay device 105, the transmission that sends data 1 regularly is adjusted based on regularly adjusting signal from the transmission data 1 of antenna 101 transmissions and from the retardation between the transmission data 2 of antenna 102 transmissions.Then,, carry out modulation treatment, be sent to terminal 200 via antenna 101 and 102 by modem module 106 and 107 for regularly adjusted transmission data 1 and transmission data 2.

Thus, send data 1 and transmission data 2 with a predetermined timing incoming terminal 200.On the other hand, for not being in the terminal of certain location relation, sending data 1 and do not arrive with predetermined timing with transmission data 2.Therefore, for example, with a bit be unit the information data string alternately is assigned to send data 1 and send data 2 and situation about sending under, for not being in the terminal of certain location relation, these transmission data do not arrive with predetermined timing and can not correctly demodulate the information data string, but because for terminal 200, these send data and arrive with predetermined timing, so terminal 200 can be with the demodulation correctly of information data string.

As mentioned above, according to present embodiment, based on from the transmission signal of a side antenna transmission by the opposing party's antenna and terminal 200 reflections and the time till returning, calculate the path difference between a plurality of antennas and the terminal, and the timing from the transmission data of each antenna transmission is adjusted, so that send signal with predetermined timing incoming terminal 200, thus have only and each antenna between be in the terminal of certain location relation can be with the demodulation correctly of information data string.

In addition, owing in communicator 100, carry out timing adjustment, so do not need to carry out the timing adjustment in the terminal, do not increase the processing load of terminal, and have only and communicator 100 between be in the terminal of certain location relation can be with the demodulation correctly of information data string.

That is to say, for and communicator 100 between be in for regular recipient's the terminal 200 of certain location relation, terminal 200 as long as received signal is merely synthetic, just can be carried out demodulation to signal even without discovering.Relative therewith, terminal informal recipient will unlawfully obtain under the situation of information, because informal recipient's terminal is not in above-mentioned certain location relation, so need adjust and can not demodulate the information data string simply to the synthetic timing of the different signal that sends respectively by antenna 101 and antenna 102, and, communicator 100 is with timing and the combination of suitable cyclomorphosis by the signal of antenna 101 and antenna 102 transmissions, the each change from the timing and the combination of the signal of antenna 101 and antenna 102 transmissions, the terminal that informal recipient had all needs regularly to adjust synthetic, therefore has the safe effect that is difficult to unlawfully obtain.

As mentioned above, transmission data 1 and transmission data 2 from antenna 101 and antenna 102 transmissions, but replenish the different data that make the demodulation of information data string by they are become each other, have only and communicator 100 between be in the terminal of certain location relation can be with the demodulation correctly of information data string.

In addition, by being the mensuration that unit carries out time difference (T2), under the situation of the shift in position of communication counterpart, can carry out the correction of time difference with the time interval that is predetermined.

In addition, calculate the time difference that is equivalent to the path difference between each antenna and the terminal 200 though discussed in the above description, and carry out the situation of timing adjustment based on the time difference that is equivalent to path difference, but constitute the position that is predetermined configurating terminal 200, and do not calculate the time difference that is equivalent to path difference by the position being limited determine the position of terminal 200, and carry out timing adjustment corresponding to this position, can implement too.In addition, also can be in the following way, timeliness ground changes the certain location relation between each antenna and terminal 200, thereby further the qualification position that can communicate concerns, that is: be provided with a plurality of configurating terminals 200 the position candidate and each user changed its position; Even user also indication by changing the position etc. impels the user to change the position to change its position; Perhaps for example terminal keeps platform oneself to have the function that changes the position carrying out the change of position.

In addition, the frequency band of the signals that send from antenna 101 and 102 must not be identical frequency band, can be made as different frequency bands yet.That is to say, for example, if the signal that sends from antenna 101 is the signal of 60GHz band, the signal that sends from antenna 102 is the signal of 3 to 5GHz frequency bands, and the propagation decline that utilizes the difference by its frequency band to cause is poor, will utilize the broadband connections of millimeter wave band and utilize the low mistake combinations of communication use of microwave band.Thus, can be set to utilize microwave band to send the information that data volume is fewer and need send reliably with low mistake, such as need before the communication and terminal 200 between the authentication of exchange with data etc., in case after authentication etc. are established, then information data is sent at high speed by the millimeter wave band that is suitable for big volume transport.

In addition, if when initial setting, arrive the time difference with antenna and the calculating of only using the microwave band of 3 to 5GHz frequency bands to send to the opposing party with data above-mentioned time difference measuring when beginning of communicating by letter, then calculate the arrival time difference owing to be longer than the use millimeter wave band time of advent, so can calculate and the time of advent between the nearer terminal of distance communication device 100 poor, thereby can also adjust with the communication between terminals that is positioned at the closer distance place regularly.For frequency conversion, for example get final product by the converter unit that constitutes by local signal source and frequency mixer.

In addition, as mentioned above, in the present embodiment to being illustrated with the situation of the direct wave that sends data 2 with predetermined timing incoming terminal 200 from antenna 101 and the 102 transmission data that send 1, but communicator 100 is further possessed be used to measure the multipath determination unit 108 of the delay wave propagation time of delay that produces by the influence of multipath, select sending antenna that data send to avoid by postponing the intersymbol interference that ripple causes.

Expression possesses the structure of major part of the communicator 100 of multipath determination unit 108 among Figure 11.For example, multipath degree of determination 108 is got known signal and from the difference between the received signal of the reality of modem module 106 or modem module 107 outputs, is measured the delay wave propagation time of delay that is produced by the influence of multipath.Multipath determination unit 108 will output to modem module 106 and 107 propagation delay time.

Below, the action of the communicator 100 that explanation as above constitutes with reference to Figure 12 to Figure 14.In addition, in the following description, illustrate when the transmission data are " 1 " to send to sending ripple, and the OOK (OnOffKeying: the situation of modulation system on-off keying) that when sending data for " 0 ", the transmission ripple is not sent.

Figure 12 B represents that transmission ripple such shown in Figure 12 A sends under the situation of terminal 200 from antenna 101, send ripple direct wave incoming terminal 200 timing and send relation between the timing of delay ripple incoming terminal 200 of ripple, described delay ripple the serve as reasons influence of the multipath between antenna 101 and terminal 200 and the delay ripple of the transmission ripple that produces.In the example shown in Figure 12 B, postpone ripple incoming terminal 200 behind the time of delay of direct wave relatively TA.

Similarly, Figure 12 C represents that transmission ripple such shown in Figure 12 A sends under the situation of terminal 200 from antenna 102, send ripple direct wave incoming terminal 200 timing and send relation between the timing of delay ripple incoming terminal 200 of ripple, described delay ripple the serve as reasons influence of the multipath between antenna 102 and terminal 200 and the delay ripple of the transmission ripple that produces.In the example shown in Figure 12 C, postpone ripple incoming terminal 200 behind the time of delay of direct wave relatively TB.

Multipath determination unit 108 mensuration these time of delay of TA and TB.And then the multipath determination unit is assigned to transmission data 1 or the either party from the transmission data 2 that antenna 102 sends who sends from antenna 101 with being included in " 1 " that sends in the data in consideration TA time of delay and TB.Below be that the situation of " 1 ", " 0 ", " 1 ", " 1 ", " 0 " is an example to send data, the distribution method of transmission data is described.

At first, as shown in FIG. 13A, consider only to send the situation of the transmission train of signal corresponding with above-mentioned transmission data from antenna 101.Shown in Figure 13 B, except direct wave, be subjected to delay ripple (intersymbol interference 1 to the 3) incoming terminal 200 of the influence of the multipath between antenna 101 and the terminal 200.

In Figure 13 B, intersymbol interference 2 is at direct wave and postpone under the result that ripple is synthesized, and phase place is cancelled and amplitude diminishes.Therefore, be that predetermined threshold value receives when above under the situation of OOK modulation system that data are judged as " 1 " at amplitude, because the amplitude of intersymbol interference 2 is less than predetermined threshold value, so be judged to be the probability of " 0 " by mistake higher and become the reason of communication errors.

Relative therewith, Figure 14 is illustrated in multipath determination unit 108 will be included in the situation of the part of " 1 " in the transmission data by direct wave and delay ripple under the situation of the opposing party's antenna 102 transmissions, that pass through each antenna 101 and 102 transmission ripples that send and incoming terminal 200.Particularly, Figure 14 A represents that from the transmission ripple of antenna 101 transmissions, Figure 14 B represents from the transmission ripple of antenna 102 transmissions.In addition, Figure 14 C represents the direct wave of incoming terminal 200 and postpones the situation of ripple.Shown in Figure 14 A and Figure 14 B, owing under the situation that in sending data, comprises " 1 " its part being sent from antenna 102, so the intersymbol interference 4 of incoming terminal 200 is identical with the intersymbol interference 1 and 3 shown in Figure 13 B with 6, but the amplitude of intersymbol interference 5 is less than decay and as correctly being judged to be " 1 " more than the predetermined threshold value, so compare with the intersymbol interference 2 shown in Figure 13 B, can suppress the probability of judging mistake lower.

As mentioned above, time of delay of the delay ripple that produces owing to the influence of as above considering by multipath and will be included in " 1 " that sends in the data and be assigned to transmission data 1 that send from antenna 101 or the transmission data 2 that send from antenna 102, be used for sending the antenna that ripple sends so can switch, its result, direct wave reduces with the probability of delay ripple with different phase place incoming terminals 200, thereby can reduce the demodulation mistake that is caused by intersymbol interference.

In addition, in the above description, because direct wave and the timing incoming terminal 200 of delay ripple to cancel each other for the transmission ripple that sends from antenna 101, understand thus when in sending data, comprising " 1 " its part is sent and make direct wave and the situation of delay ripple with nonoverlapping timing incoming terminal 200 from antenna 102, but, also can be used as the antenna that transmission data " 1 " are sent and use antenna 101 on one's own initiative for the direct wave of the transmission ripple that sends from antenna 101 with postpone under the situation of ripple with identical phase place incoming terminal 200.Thus, direct wave with postpone ripple with identical phase place incoming terminal 200, signal to noise ratio) and improve demodulation performance and with the result that identical phase place is synthesized, amplitude increases and can access the synthetic same effect with Rake (Rake), thereby can improve SNR (SingletoNoiseRatio:.

(execution mode 2)

The structure of the major part of the communicator 100 of expression embodiment of the present invention in Figure 15.The difference of the communicator of the structure of the major part of communicator 100 and above-mentioned execution mode 1 described Fig. 4 is, adopted antenna 101 and antenna 102 transversely arranged, and terminal 200 is placed on their top configuration, have regularly computing unit 401-1 and 401-2 with replacement timing computing unit 104, and appended regularly adjustment unit 402.

Timing computing unit 401-1 and 401-2 possess the structure of having deleted initial time difference memory cell 306 and differing from computing unit 307 time of advent from the structure of the major part of timing computing unit 104 shown in Figure 8, return next reflected signal based on transmission signal by terminal 200 from each antenna transmission, calculating is equivalent to from each antenna to terminal the time difference of 200 path difference, and the time difference that calculates is outputed to regularly adjustment unit 402.That is to say that regularly computing unit 401-1 calculates the time difference that is equivalent to the path difference between antenna 101 and the terminal 200, regularly computing unit 401-2 calculates the time difference that is equivalent to the path difference between antenna 102 and the terminal 200.

Regularly adjustment unit 402 is based on the time difference that is equivalent to each path from timing computing unit 401-1 and 401-2 output, generation is used to adjust the transmission timing regularly of the transmission signal that sends from antenna 101 and adjusts signal, so that the transmission signal that sends from antenna 101 and antenna 102 is with predetermined timing incoming terminal 200.Regularly adjustment unit 402 is adjusted signal with the timing that is generated and is outputed to variable delay device 105.That is to say, based on sending from antenna 101 and antenna 102 and arrive time difference of each antenna, the transmission of the transmission data that send from antenna 101 is regularly adjusted by the reflected signal of terminal 200 reflections.Thus, the transmission signal that sends from antenna 101 and antenna 102 arrives with predetermined timing and is positioned at the terminal 200 in specific zone, thereby has only terminal 200 to communicate.

As mentioned above, according to present embodiment, because by the time difference of the path difference between the path of asking the path that is equivalent to antenna 101 and terminal 200 and antenna 102 and terminal 200, and the time of advent of calculating the transmission signal that passes through each antenna transmission is poor, decide retardation, even so under the situation that terminal 200 can't be arranged between antenna 101 and the antenna 102, also can carry out the demodulation of information data string with predetermined timing incoming terminal 200 by making the transmission data, therefore compare with execution mode 1, can reduce antenna 101,102 and the restriction of the set-up mode of terminal 200.

In addition, though represented the antenna of communicator is made as two example in the above-described embodiment, but antenna is not limited to two, and the modem module of antenna more than three and the setting number corresponding with number of antennas and computing unit regularly also can be set.Expression has the structure of major part of the communicator of three antennas among Figure 16.Adopted the structure of Figure 15 having been appended third antenna 403, the 3rd modem module 404, the 3rd timing computing unit 401-3 and second variable delay device 405 among Figure 16.Number of antennas is being increased under three the situation, owing to use the transmission data computation time difference by three antenna transmission, so the terminal that only is positioned at apart from the specific distance of all antennas can correctly demodulate the information data string, thereby the specific zone that can communicate can be narrowed down to more limited zone.

(execution mode 3)

Embodiments of the present invention 3 describe the terminal of reception from the transmission signal of the communicator transmission of execution mode 1 and 2.

As an example, the terminal 200 of reception from the pulse signal of the communicator transmission of execution mode 1 and 2 described.Represent to represent to send the transmission timing of signal at Figure 17 B at Figure 17 A from second of communicator 100 transmissions from the transmission timing of the first transmission signal of communicator 100 transmissions.The first transmission signal (Figure 17 A) and second that sends from communicator 100 sends signal (Figure 17 B), with timing incoming terminal 200 shown in Figure 17.In the present embodiment, first sends the pulse signal of signal after for modulation, for example, and at OOK (OnOffKeying: on-off keying) under the situation of modulation system, if pulse is arranged then represent " 1 ", if do not have pulse then represent " 0 ".On the other hand, the second transmission signal is a timing signal, for example comprises the clock of synchronous usefulness.That is to say,, can correctly carry out demodulation data by sending signal and comprise the synchronous second transmission signal combination as first of information data string with clock.

The structure of major part of representing to receive the terminal 200 of pulse signal shown in Figure 17 at Figure 18.Terminal 200 shown in this figure possesses: antenna 501,502 and 512; Filter 503-1,503-2 and 511; Amplifier 504-1,504-2 and 510; Wave detector 505-1 and 505-2; Clock recovery device (clockrecovery) 506; ADC (AnalogtoDigitalConverter: analog digital converter) 507; Data processing unit 508; And pulse modulation unit 509.

Antenna 501 and 502 receives the first and second transmission signals that sent by communicator 100 respectively.Filter 503-1,503-2 and 511 are to received signal or send signal and carry out frequency band limits.Amplifier 504-1,504-2 and 510 to received signal or the amplitude level that sends signal adjust.Wave detector 505-1 and 505-2 carry out envelope detection to received signal, and wave detector 505-1 outputs to ADC507 with the envelope detection result, and wave detector 505-2 outputs to clock recovery device 506 with the envelope detection result.

Clock recovery device 506 generates the timing signal of received signal based on the envelope detection result, and outputs to ADC507.ADC507 uses timing signal to sample to received signal.Received signal after 508 pairs of samplings of data processing unit is carried out demodulation process.

Particularly, send the pulse signal of signal transmission and the timing signal that sends as the second transmission signal owing to comprise in received signal by communicator 100 as first, the received signal that 508 pairs of data processing units have been removed from the received signal after the sampling after the removing of clock signal is carried out demodulation process.In addition, sending by different carrier frequency bands under the situation that sends the signal and the second transmission signal by first of communicator 100 transmissions, owing to carry out frequency band limits respectively by filter 503-1 and 503-2, get final product so the received signal after 508 pairs of samplings of data processing unit is directly carried out demodulation process.

In addition, it is contemplated that except the first transmission signal and second direct wave that signals that send by communicator 100, also mix and have reflected wave and the situation of incoming terminal 200.Yet, direct wave and the situation of reflected wave with identical arrival timing incoming terminal 200 seldom appear, signal power difference between direct wave and the reflected wave is comparatively remarkable because the propagation attenuation of millimeter wave is big, so data processing unit 508 can separate direct wave and reflected wave.

And then data processing unit 508 will send data and output to pulse modulation unit 509, and handle carrying out digital demodulation from the sampled data of ADC507 output.509 pairs of pulse modulation unit send data and carry out the pulse modulation processing, and output to amplifier 510.Antenna 512 will pass through amplifier 510 and filter 511 after pulse modulation transmission signal sends to communicator 100.

The reception action of the terminal 200 that as above constitutes then, is described.

First send signal from what the antenna 101 of communicator 100 sent, be received (hereinafter referred to as " first received signal ") by antenna 501, via filter 503-1 and amplifier 504-1, carry out envelope detection by wave detector 505-1, the detection result is output to ADC507.

On the other hand, second send signal from what the antenna 102 of communicator 100 sent, be received (hereinafter referred to as " second received signal ") by antenna 502, via filter 503-2 and amplifier 504-2, carry out envelope detection by wave detector 505-2, the detection result is output to clock recovery device 506.

Then, at clock recovery device 506, second received signal after envelope detection generates timing signal.

As mentioned above, because the second transmission signal that sends from antenna 102 comprises the clock of synchronous usefulness in the present embodiment, can generate timing signals by clock recovery device 506.Then, use timing signal, sample, carry out digital demodulation by first received signal after 508 pairs of samplings of data processing unit and handle by first received signal of ADC507 after to envelope detection.

In addition, though illustrated that in Figure 17 second sends signal in the situations that might exist first all timings that send signal all to exist, the low frequency signal that also can double in clock recovery device 506 generates timing signal.Thus, can use long signal of pulse repetition period to send signal as second.

In addition, represent to receive other configuration example of the terminal 200 of pulse signal shown in Figure 17 at Figure 19.In addition, with respect to Figure 18, possess correlator 513 among Figure 19 and replacement wave detector 505-1, correlator 513 carries out synchronous detection and replaces envelope detection.Can generate timing signal with higher precision thus, thereby can improve demodulation performance.

Other the example of representing the pulse signal that sends by the communicator of execution mode 1 and 2 at Figure 20.It is that (BiPhaseSiftKeying: the pulse signal after modulation two-phase PSK), each pulse signal is with identical timing incoming terminal 200 for BPSK that the first transmission signal (Figure 20 A) and second sends signal (Figure 20 B).

Possess in terminal 200 under the situation of structure of major part as shown in figure 19, correlator 513 is output as the waveform that the first transmission signal and second such shown in Figure 20 C sends signal combination by multiplying each other, if the result is for just in output, then be judged to be " 1 " by data processing unit 508, if the output result then is judged to be " 0 " by data processing unit 508 for negative.

In addition, sending first sending under the situation of the signal (Figure 21 A) and the second transmission signal (Figure 21 B) of sending from the communicator of execution mode 1 and 2 with timing relationship shown in Figure 21, the terminal 200 of structure that can be by possessing major part shown in Figure 22 is carried out demodulation.Figure 22 adopts the structure that Figure 19 has been appended delayer 601.That is to say, under the regularly different situation of the arrival of the first transmission signal and the second transmission signal, adjust regularly by postpone the first transmission signal by delayer 601, and carry out related operation by the transmission signal of first after 513 pairs of delays of correlator and the second transmission signal.

In addition,, all measure when changing retardation at every turn and arrive regularly, and the timing adjustment of carrying out retardation is till arriving regularly unanimity at delayer 601.

Other an other example of representing the pulse signal that sends by the communicator of execution mode 1 and 2 at Figure 23.Figure 23 represents to send the situation that signal (Figure 23 B) and the 3rd sends signal (Figure 23 C) incoming terminal 200 by the first transmission signal (Figure 23 A), second that the communicator 100 that possesses three antennas sends.As shown in the drawing, first, second is adjusted in order to avoid each signal repeatedly exists mutually in identical timing through timing with the 3rd transmission signal, and incoming terminal 200.

The structure of major part of representing to receive the terminal 200 of pulse signal shown in Figure 23 at Figure 24.Terminal 200 shown in Figure 24 possesses antenna 701, filter 702, amplifier 703, wave detector 704, clock recovery device 705, template signal generation unit 706, correlator 707, ADC708 and data processing unit 709.That is to say, as Figure 23 A, shown in Figure 23 B and Figure 23 C such first, second and the 3rd sends signal through regularly adjusting in order to avoid under the situation that identical timing repeatedly exists mutually, can receive whole signals of first to the 3rd transmission signal by single antenna 701, by obtain relevant between the template signal (Figure 23 D) that generates by template signal generation unit 706 and the received signal by correlator 707 with the waveform combination, and positive and negative (Figure 23 E) based on correlated results judges " 1 " and " 0 ", even sent under the situation of first to the 3rd transmission signal at the communicator that possesses three antennas 100 as shown in figure 16, also can carry out demodulation process.

In addition, use template signal to carry out synchronous detection, also can carry out demodulation process and not use template signal by postponing detection though in Figure 24, establish terminal 200.In addition, though the situation of BPSK modulation has been described in above-mentioned example, but be not limited to this, even adopting OOK modulation, PPM (PulsePositionModulation: pulse position modulation) under the situation of other modulation system of modulation etc., can carry out demodulation too.

In addition, also can be used as first or second and send the synchronizing information that signal sends expression frame frame synchronization information regularly etc.Represent a routine oscillogram at Figure 25.The first transmission signal is the pulse signal (Figure 25 A) after the BPSK modulation, and the second transmission signal is the signal (Figure 25 B) of the expression frame synchronization information after the BPSK modulation.Figure 25 C represents Figure 25 A is carried out the data of distributing to the first transmission signal that demodulation result obtains, and Figure 25 D represents the second transmission data after the demodulation, and the timing that wherein occurs " 1 " " 0 " side by side is the frame synchronization timing.As mentioned above, communicator 100 is adjusted to send regularly and is sent, so that information data and frame synchronization information regularly only arrive the terminal 200 that is in the certain location relation matchingly with it.Therefore, even change based on communication quality under the situation of frame length, terminal 200 also can correctly obtain frame synchronization, but is being in certain location relation terminal in addition, because information data and frame synchronization information do not arrive with matching, so can not correctly obtain frame synchronization.

In addition, terminal 200 receives composite signal, this composite signal is the composite signal of the signal of the expression frame synchronization information after modulating as the pulse signal after the BPSK modulation of the first transmission signal transmission with as second BPSK that sends the signal transmission, the threshold value of passing through makes received signal match amplitude level, and composite signal is separated into the frame synchronization information shown in the pulse signal shown in Figure 25 A and Figure 25 B.In addition, using different carrier frequency bands to send under the situation of the first transmission signal and the second transmission signal, by using different filters to carry out frequency band limits, composite signal is separated into the frame synchronization information shown in the pulse signal shown in Figure 25 A and Figure 25 B equally.

In addition, as the first or second transmission signal, also can authenticate with data so that tighten security with the chain transmission of information data.Thus, only be in the terminal 200 of the certain location of communicator relation can with the chain authentication data that obtain of information data, the terminal 200 that only is positioned at specific zone subsequently authenticates, and can be to carrying out demodulation with this authentication with the information data string that data sync arrives.

As mentioned above, according to present embodiment, antenna 101 or 102 by communicator 100, the synchronizing information of information data and expression frame frame synchronization information regularly etc. is sent signal as first and second respectively, adjust to send regularly and also send, thereby the terminal 200 that only is in the certain location relation of communicator 100 can correctly obtain frame synchronization and correctly demodulate the information data string so that they arrive the terminal 200 that is in the certain location relation with predetermined timing.That is to say,, can correctly demodulate the information data string by the combination of information data and frame synchronization information.In addition, number of antennas is not limited to three, even can implement too under the situation more than two or four.

(execution mode 4)

4 pairs of embodiments of the present invention are described by the wireless system that the terminal 200 of the communicator 100 of execution mode 1 and 2 and execution mode 3 constitutes.A routine wireless system of representing embodiment of the present invention 4 at Figure 26.As shown in the drawing, being characterized as of the wireless system of present embodiment 4 makes terminal 200 move to the second place from primary importance intentionally, and changes the timing adjustment to the transmission signal that sends to the terminal that is positioned at the second place after moving.Among this figure, because the structure of the described radio-cell 103 of either party of the structure of radio-cell 801 and execution mode 1 and 2 is common, so omit its explanation.

Then, use the as above action of the wireless system of formation of oscillogram explanation of Figure 27.Figure 27 represents to arrive the arrival timing of the first and second transmission signals of the terminal that is positioned at first and second positions.In addition, among this figure＜1〉and＜2 represent respectively from what the antenna 101 and 102 of communicator 100 sent first to send signal and second and send signal.

At first, communicator 100 utilizes said method that first timing that sends signal that sends from antenna 101 is adjusted, and the terminal 200 that is positioned at primary importance is sent first send the signal (Figure 27 A) and the second transmission signal (Figure 27 B).In terminal 200, because the first transmission signal and second that is sent by communicator 100 sends signal (Figure 27 C) with predetermined timing arrival, so send signal and carry out combination by receiving these, the information data string is by demodulation.

In terminal 200, the information data string through behind the preset time, is moved to the indication of the second place by demodulation from primary importance to terminal 200 notices by communicator 100.Then, hold the user of terminal 200, the position of terminal 200 is moved to the second place from primary importance, described terminal 200 has accepted to carry out the indication that move the position.In addition, be not limited to position, for example also can terminal 200 be placed on predetermined pallet etc. and pallet is moved by the user by customer mobile terminal 200.

Figure 27 D is illustrated in terminal 200 and has just moved to after the second place, is transmitted a signal to the situation of the timing that reaches terminal 200 by first and second of communicator 100 transmissions.Because change the time of advent from each antenna after just moving, so the first and second transmission signals can increase mistake not with predetermined timing incoming terminal 200 in 200 demodulated information serial datas of terminal.

Therefore, in the wireless system of present embodiment, for the terminal 200 that moves to the second place, step during once more by above-mentioned initial setting when communicating by letter beginning is calculated to result from and is sent to first of terminal 200 after moving from antenna 101 to send time of advent of difference in the path between signal and the second transmission signal that sends to the terminal 200 after moving from antenna 102 poor.Then, similarly first transmission that sends signal is regularly adjusted with execution mode 1 and 2.Thus, first and second send the terminal that is positioned at the second place 200 after signal moves with predetermined timing arrival, receive first and second by terminal 200 and send signals, thereby the information data string is by demodulation.

As mentioned above, according to present embodiment, send and regularly adjust so that the first and second transmission signals that sent by communicator 100 arrive the terminal that is positioned at primary importance with predetermined timing, accept then to make terminal 200 move to the second place, and send and regularly adjust so that first and second send signals and arrive terminals that are positioned at the second place after moving with predetermined timing by what communicator 100 sent by the indication of communicator 100 notice.

Therefore, though before moving with the primary importance of communicator 100 and terminal 200 between distance other position of being in identical distance relation also can carry out demodulation, but after moving, have only with communicator 100 and demodulation can be carried out in position that the distance between the second place of the terminal 200 after moving is in identical distance relation, so the position relation of the terminal 200 that can communicate with communicator 100 can be limited to more limited zone.

In addition, though illustrated that in the present embodiment (RadioFrequencyIdentification: the example of such cassette terminal radio frequency identification) also can be applicable to the present invention the terminal of vehicle mounted to hypothesis RFID.Represent that at Figure 28 an example is applicable to the present invention the allocation plan of the communication system of vehicle mounted terminal.This figure is the communication system that an example has been utilized parking space, parking space possesses vehicle chocking piece 902, first antenna 101, second antenna 102, radio-cell 103 and the roof 903 that is used to limit parking spot, and radio-cell 103 is arranged on the roof 903.

In addition, for primary importance, so long as in the communication zone where all can, just in communication zone, be not specially limited, vehicle mounted terminal 200 communicates by the position more than two places, can correctly demodulate the information data string that is sent by communicator 100.

That is to say, when vehicle 901 stops at parking space, in the front and back that move to the second place from primary importance, because of sending regularly, communicator 100 adjusts, and the terminal beyond the vehicle mounted terminal 200 can not correctly demodulate the information data string that is sent by communicator 100 and be difficult to receive.

From the above mentioned, being mounted with the vehicle of vehicle mounted terminal 200 can be in introduction that obtains the shop for shopping after stopping in the parking lot and regional information etc.

(execution mode 5)

5 pairs of embodiments of the present invention are described by the wireless system that the terminal 200 of the communicator 100 of execution mode 1 and 2 and execution mode 3 constitutes.The wireless system of representing a routine embodiment of the present invention 5 at Figure 29.As shown in the drawing, the difference of the wireless system of present embodiment 5 and above-mentioned execution mode is, possess reflecting plate 1001, antenna 101 sends signal with first and sends to this reflecting plate 1001, and the structure of the communicator 100 and the major part of terminal 200 is identical with above-mentioned execution mode.

That is to say, in the present embodiment, use first sends be reflected plate 1001 reflections and the reflected wave of incoming terminal 200 of signal and replaces first direct wave that sends signal that sends from antenna 101 from what antenna 101 sent, thereby the time of advent of calculating between antenna 101 and antenna 102 and the terminal 200 is poor, and sends adjustment regularly.

Generally, need be approximately the path difference of 30cm for the time difference of giving 1ns, but as described above, according to present embodiment, because reflecting plate 1001 is set, simulation ground lengthening path difference prolongs and arrives the time difference, so even can make up under the situation that disposes antenna 101 and antenna 102 contiguously, also only be in the wireless system that terminal that certain location concerns can communicate with communicator.In addition, owing to can dispose antenna 101 and antenna 102 with being close to, so can realize the miniaturization of communicator 100.In addition, second send signal, also can not use direct wave and use reflected wave to send adjustment regularly for what send from antenna 102.

In addition, though at above-mentioned execution mode 3 to execution mode 5, only put down in writing the situation of using OOK modulation system and BPSK modulation system as modulation system, but be not limited to this, use PPM modulation system, ASK (AmplitudeShiftKeying: amplitude shift keying) modulation system, multistage ASK modulation system, PSK (PhaseShiftKeying: phase shift keying) modulation system or multistage PSK modulation system, and made up under the situation of other modulation system of these modes, also can access same effect.

In addition, though the situation of having only communicator 100 to send adjustment regularly has been described in the above-described embodiment, but also can constitute terminal 200 and similarly possess adjustment function regularly with communicator 100, the timing of the transmission signal by a plurality of antenna transmission finely tuned proofread and correct small deviation, thereby improve receiving sensitivity.

In addition, communicator 100 and terminal 200 are coordinated, through changing timing after the certain hour by the transmission signal of a plurality of antenna transmission.For example, making at first and establishing the first transmission signal is time of delay 0, the second transmission signal is the agreement that delay time T is synthesized, passed through after the certain time interval T 100 of communicators to send signal delay τ * 2 and sent second, terminal 200 with second send signal as time of delay 0 ground synthesize, thereby can similarly proceed demodulation with initial state.Wherein, τ and T are time arbitrarily.

In addition, though only being described in the above-described embodiment, the transmission signal and the time difference between the reflected signal of using from antenna transmission carry out the regularly situation of adjustment, but utilize following method also can implement, be that terminal 200 is sent response signal back to based on sending signal after having passed through reasonable time, use the time difference between them to calculate the timing of being adjusted.Perhaps, if be used in combination the adjustment by reflected signal and send the adjustment of response signal after the above-mentioned elapsed time back to, also can implement equally.Ratio omission reduces because the signal level of response signal is big, so by using response signal, can simplify the timing adjustment of transmitting terminal.In addition,, when using reflected signal, do not postpone, so, can improve regularly computational accuracy by being used in combination these adjustment though when using response signal, error can occur owing to the internal latency of the equipment end that can not correctly estimate to respond.

In addition, though there is possibility by the reflected wave incoming terminal 200 of the reflection of the object beyond the reflecting plate 1001, but because the reflected wave that influences incoming terminal 200 that needs only because of this multipath is not synthesized in suitable timing when receiving, then can when receiving demodulation, not sample, so the possibility that the information data string that obtains through demodulation is brought influence seldom by A/D converter etc.

In addition, also can constitute, if send from antenna 101 first send that the reflected wave of signal incoming terminal 200 by reflecting plate 1001 reflections and antenna 102 from the opposing party send second to send the reception timing of direct wave of signal consistent by accident, when the information data string that obtains through demodulation is affected, further change the timing that sends the second transmission signal from antenna 102, for example remove the higher timed sending of effect second and send signal, reduce the influence that the reflected wave by the reflection of the object beyond the reflecting plate 1001 causes the information data string thus with the influence of the multipath by error correction.

The structure that a scheme of communicator of the present invention adopts possesses: first generation unit, and concatenate into first based on information data and send signal; Second generation unit generates second and sends signal, and described second sends signal by with predetermined timing and the described first transmission signal combination, makes the described information data string can demodulation; First antenna is used to send described first and sends signal; Second antenna is used to send described second and sends signal; And adjustment unit, described first transmission that sends at least one side of signal and the described second transmission signal is regularly adjusted, so that sending signal, the described first transmission signal and described second arrives specific zone with predetermined timing.

According to this structure, owing to arrive predetermined zone with predetermined timing from the first transmission signal and the second transmission signal of two antenna transmission, can use the first transmission signal and the second transmission signal of concatenating based on information data to come the information data string is carried out demodulation so only be positioned at the communication counterpart in specific zone, the area limiting that can communicate with simpler structure is extremely limited zone.

The structure that a scheme of communicator of the present invention adopts also possesses time difference calculating unit, calculating described first transmits a signal to the time and described second that reaches described specific zone and transmits a signal to time difference between the time that reaches described specific zone, described adjustment unit is based on the described time difference, described first transmission that sends at least one side of signal and the described second transmission signal is regularly adjusted, arrived described specific zone with predetermined timing so that the described first transmission signal and described second sends signal.

According to this structure, to transmit a signal to time and time of advent of transmitting a signal to from second of second antenna transmission between time in zone of Da Teding in zone of Da Teding from first of first antenna transmission poor owing to can calculate, even so under the situation of the position that has changed communication counterpart, also can send communication counterpart after only changing and could obtain first of information data string through demodulation and send signal and second and send signal.

The structure that a scheme of communicator of the present invention adopts is, described time difference calculating unit is based on T1 two-way time of the signal on the propagation path between described first antenna and described second antenna, and T2 two-way time of the signal on the propagation path between described first antenna or described second antenna, one side's antenna and the described specific zone, calculate the described time difference.

According to this structure, at communication counterpart under the situation between first antenna and second antenna, can obtain the time difference that reaches communication counterpart that transmits a signal to by first antenna and second antenna transmission, the time difference that use is tried to achieve is adjusted transmission regularly so that the first transmission signal and second sends the order arrival communication counterpart of signal with regulation, thereby only the communicator between first antenna and second antenna can carry out demodulation to the information data string.

The structure that a scheme of communicator of the present invention adopts is, the described second transmission signal that described time difference calculating unit uses described second antenna to receive by described first antenna-reflected, what perhaps described first antenna received sends signal by described first of described second antenna-reflected, calculate described two-way time of T1, and use that described first antenna receives send signal in described first of described specific regional reflex, what perhaps described second antenna received sends at least one side of signal in described second of described specific regional reflex, calculates described two-way time of T2.

According to this structure, can be based on first time that sends signal is turned back to first antenna by second antenna-reflected till, perhaps second time that sends signal is turned back to second antenna by first antenna-reflected till, calculate T1 two-way time of the signal on propagation path of first antenna and second antenna.And, can send signal or second based on first and send time signal is turned back to each antenna by the communication counterpart reflection till, calculate T2 two-way time, thereby can so that sending signal, the first transmission signal and second only arrive communication counterpart based on sending adjustment regularly the two-way time of trying to achieve with the order of stipulating.

The structure that a scheme of communicator of the present invention adopts is, T3 two-way time based on the signal on the propagation path between described first antenna and the described specific zone, and T4 two-way time of the signal on the propagation path between described second antenna and the described specific zone, calculate the described time difference.

According to this structure, even do not have under the situation between first antenna and second antenna at communication counterpart, also can obtain the time difference that reaches communication counterpart that transmits a signal to by first antenna and second antenna transmission, can adjust and send timing, can obtain the communication counterpart of information data string and the restriction that the position between the antenna concerns through demodulation thereby can reduce so that the first transmission signal and the second transmission signal arrive communication counterpart with the order of stipulating.

The structure that a scheme of communicator of the present invention adopts is, described time difference calculating unit, that uses that described first antenna received has carried out described first of reflection and has sent calculated signals described two-way time of T3 in described specific zone, and use that described second antenna received in described specific zone, carried out described second of reflection and sent calculated signals described two-way time of T4.

According to this structure, can be based on first time that sends signal is turned back to first antenna by the communication counterpart reflection till, calculate T3 two-way time of the signal on propagation path of the first transmission signal and communication counterpart, and, can be based on second time that sends signal is turned back to second antenna by the communication counterpart reflection till, calculate T4 two-way time of the signal on propagation path of the second transmission signal and communication counterpart, thereby can adjust based on sending the two-way time of trying to achieve regularly, only arrive communication counterpart with the order of stipulating so that the first transmission signal and second sends signal.

The structure that a scheme of communicator of the present invention adopts is, described second generation unit generates described first contrast signal that sends signal and sends signal as described second, and described adjustment unit adjustment sends regularly so that the described first transmission signal arrives described specific zone with described second part that sends signal in the identical moment.

According to this structure, owing to can make first to send signal and only arrive the communication counterpart that is positioned at specific zone in the identical moment, regularly the information data string be carried out synchronous demodulation so can transmit a signal to the reception that reaches communication counterpart with reference to second as first second part that sends signal that sends the contrast signal of signal.

The structure that scheme of communicator of the present invention adopts is, described contrast signal be the expression described first symbol synchronization information that sends the phase bit timing of signal, expression communication frame frame regularly frame synchronization information or authentication with the part of information.

According to this structure, because the symbol synchronization information and the frame synchronization information of expression phase bit timing send signal as second, with first send signal and obtain synchronously only to arrive and be positioned at the communication counterpart in specific zone, can correctly obtain symbol synchronization and frame synchronization and correctly demodulate the information data string so only be positioned at the communication counterpart of predetermined zone.In addition, because authentication sends signal with information as second, with first send signal and obtain synchronously only to arrive and be positioned at the communication counterpart in specific zone, so only be positioned at that the communication counterpart of predetermined zone can authenticate to obtaining the synchronously information data string demodulation correctly of arrival with data with this authentication.

The structure that a scheme of communicator of the present invention adopts is, described first generation unit and the described second generation unit production burst signal send signal and described second as described first and send signal, and described adjustment unit adjustment sends regularly so that the described first transmission signal and described second sends signal and alternately arrives described communication counterpart.

According to this structure, because the first transmission signal and second sends signal and alternately only arrives the communication counterpart that is positioned at specific zone, for example to send signal be first to send under the situation of contrast signal of signal establishing second, and the communication counterpart that only is positioned at predetermined zone can use first to send signal and second and send signal and obtain the information data string through synchronous demodulation.

The structure that a scheme of communicator of the present invention adopts is, described second generation unit generates described first timing signal that sends signal and sends signal as described second, and described adjustment unit adjustment sends regularly so that the described first transmission signal arrives described specific zone with described second part that sends signal in the identical moment.

According to this structure, can make first to send signal and only arrive the communication counterpart that is positioned at specific zone in the identical moment, regularly the information data string be carried out synchronous demodulation so can transmit a signal to the reception that reaches communication counterpart with reference to second as first second part that sends signal that sends the timing signal of signal.

The structure that a scheme of communicator of the present invention adopts is that described timing signal is for being used for clock signal synchronous.

According to this structure, owing to sending signal as the second transmission signal and first, first clock signal that sends the synchronous usefulness of signal obtains synchronously the communication counterpart that only arrival is positioned at specific zone, can use second to send the clock signal of signal so be positioned at the communication counterpart of predetermined zone, and the information data string is carried out synchronous demodulation reliably as synchronous usefulness.

The structure that a scheme of communicator of the present invention adopts is that described time difference calculating unit is with the described time difference of preset time measuring space.

According to this structure, because with the preset time measuring space time difference, so all adjust transmission regularly in each scheduled time, even under the situation of in communication zone, having carried out moving in the position of communication counterpart, also can adjust transmission regularly so that the first transmission signal and second sends the communication counterpart after signal moves with the order arrival of regulation, thereby communicator can carry out demodulation to the information data string.

The structure that a scheme of communicator of the present invention adopts also possesses notification unit, the communication counterpart that notice is positioned at described specific zone carries out the indication that move the position, described time difference calculating unit is based on described first time that transmits a signal to the zone of the described communication counterpart institute position that reaches after moving, and described second time that transmits a signal to the zone of the described communication counterpart institute position that reaches after moving, calculate the described time difference once more, described adjustment unit was adjusted sending regularly based on the described time difference that calculates once more.

According to this structure, owing to make the communication counterpart shift position, obtain once more by first and second of first antenna and second antenna transmission and transmit a signal to the poor of the required time that reaches the communication counterpart after moving, and use the time difference of trying to achieve to send adjustment regularly by adjustment unit, so the first transmission signal and second sends signal and arrives the communication counterpart that is positioned at the zone after moving with predetermined timing, thereby the area limiting that can communicate can be more limited scope.

The structure that scheme of communicator of the present invention adopts is, at least one side of described first antenna and described second antenna sends to specific fixed object, described specific fixed object be fixed on described specific regional different direction on.

According to this structure, because when calculating is equivalent to the time difference of first and second antennas and the path difference between the communication counterpart in specific zone, for at least one side, based on calculating via the time of specific fixed object arrival communication counterpart, rather than calculate based on the time that the transmission signal by first and second antenna transmission directly arrives communication counterpart, described specific fixed object is fixed on the direction different with the position of the communication counterpart that is positioned at specific zone, even so under the contiguous mutually situation of first and second antennas, also can prolong path difference with simulating, and can make first and second antennas near and realize the miniaturization of communicator.

The structure that scheme of communicator of the present invention adopts also possesses converter unit, sends the signal that signal or the described second at least one side's frequency conversion that sends signal are different carrier frequency band with described first.

According to this structure, can be with the data volume fewer information data string of authentication with data etc., use the low mistake of microwave band and send reliably, and in case established after the authentication, can use millimeter wave band to send the bulky information serial data at high speed.

The structure that a scheme of communicator of the present invention adopts also possesses the multipath determination unit, multipath when measuring first inhibit signal and second time of delay, described first inhibit signal and second time of delay is, send signal and described second by the influence of multipath to described first and send first inhibit signal and second inhibit signal that signal produces, send signal and described second and transmit a signal to time till reaching described specific zone being later than described first, described first and described second generation unit based on described first and the multipath status signals of described second time of delay of described multipath determination unit output, generate first generation unit described first and described second and send signal.And set the signal that second generation unit is generated.

According to this structure, because under the situation of the OOK modulation system that is sent in " 1 " that comprised in the information data string with connection signal (on signal), when the direct wave that sends signal by first of first antenna transmission arrives communication counterpart with the delay ripple with different phase places, can be assigned to by first of first antenna transmission and send signal or second send signal and send being included in " 1 " in the information data string by what second transmitting antenna sent,, can reduce the demodulation mistake that causes by intersymbol interference so thereby direct wave arrives the ratio regular meeting minimizing that communication counterpart synthesizes with cancelling each other with the delay ripple with different phase places.

The structure that scheme of communicator of the present invention adopts is, described specific zone is to be predetermined and the obvious place of the regulation of the described communicator of indication.

According to this structure, because transmitting a signal to the time in the zone of Da Teding is known from first of first antenna transmission with the difference time of advent between the time in zone that transmits a signal to Da Teding from second of second antenna transmission, calculates the operand ground adjustment transmission timing that arrives the time difference so can omit.

The structure that scheme of communicator of the present invention adopts is, described first sends signal and described second, and to send signal be the signal that has carried out behind the differential coding.

According to this structure, only be positioned at first and send communicator that signal and second sends the specific zone that signal arrives with the order of regulation and can carry out differential decoding the information data string is decoded.

A scheme of communication means of the present invention possesses: the step of concatenating into the first transmission signal based on information data; Generate the step of the second transmission signal, described second sends signal passes through to send signal combination with predetermined timing and described first, but makes the demodulation of described information data string; Send the step of the described first transmission signal; Send described second step that sends signal: and send signal and described second transmission that sends at least one side of signal is regularly adjusted to described first, so that described first sends signal and described second and send signal arrives specific zone in predetermined timing step.

According to this method, owing to make the first transmission signal and the second transmission signal arrive predetermined zone with predetermined timing by two antenna transmission, can use the first transmission signal and the second transmission signal of concatenating to obtain the information data string so only be positioned at the communication counterpart in specific zone, thereby the area limiting that can communicate with simpler structure is extremely limited zone through demodulation based on information data.

This specification is willing to 2005-344173 based on the Japanese patent application laid of submitting on November 29th, 2005, and the Japanese patent application laid of submitting on November 6th, 2006 is willing to 2006-300576.Its content is included in this.

Industrial applicibility

Communicator of the present invention and communication means can provide with fairly simple structure, only make to be in Communicator and communication means that the terminal installation of specific position relationship can communicate, for example, to Only with limited place as the communicator that is suitable in the communication system of communication zone and communication means etc. Of great use.

Claims (19)

1, a kind of communicator possesses:

First generation unit is concatenated into first based on information data and is sent signal;

Second generation unit generates second and sends signal, and described second sends signal passes through to send signal combination with predetermined timing and described first, but makes the demodulation of described information data string;

First antenna is used to send described first and sends signal;

Second antenna is used to send described second and sends signal; And

Adjustment unit is regularly adjusted described first transmission that sends at least one side of signal and the described second transmission signal, arrives specific zone so that the described first transmission signal and described second sends signal with predetermined timing.

2, communicator as claimed in claim 1, wherein,

Also possess: time difference calculating unit, calculate described first and transmit a signal to the time and described second that reaches described specific zone and transmit a signal to time difference between the time that reaches described specific zone,

Described adjustment unit is based on the described time difference, described first transmission that sends at least one side of signal and the described second transmission signal is regularly adjusted, arrived described specific zone with predetermined timing so that the described first transmission signal and described second sends signal.

3, communicator as claimed in claim 2, wherein,

Described time difference calculating unit is based on T1 two-way time of the signal on the propagation path between described first antenna and described second antenna, and T2 two-way time of the signal on the propagation path between described first antenna or described second antenna, one side's antenna and the described specific zone, calculate the described time difference.

4, communicator as claimed in claim 3, wherein,

What described time difference calculating unit used that described second antenna receives sends signal by described second of described first antenna-reflected, and what perhaps described first antenna received sends signal by described first of described second antenna-reflected, calculates described two-way time of T1,

And use that described first antenna receives send signal in described first of described specific regional reflex, what perhaps described second antenna received sends at least one side of signal in described second of described specific regional reflex, calculates described two-way time of T2.

5, communicator as claimed in claim 2, wherein,

Described time difference calculating unit is based on T3 two-way time of the signal on the propagation path between described first antenna and the described specific zone, and T4 two-way time of the signal on the propagation path between described second antenna and the described specific zone, calculate the described time difference.

6, communicator as claimed in claim 5, wherein,

Described time difference calculating unit, that uses that described first antenna received has carried out described first of reflection and has sent calculated signals described two-way time of T3 in described specific zone,

And use that described second antenna received in described specific zone, carried out described second of reflection and sent calculated signals described two-way time of T4.

7, communicator as claimed in claim 1, wherein,

Described second generation unit generates described first contrast signal that sends signal and sends signal as described second,

Described adjustment unit adjustment sends regularly so that described first part that sends signal and the described second transmission signal arrives described specific zone in the identical moment.

8, communicator as claimed in claim 7, wherein,

Described contrast signal is the symbol synchronization information of the phase bit timing of the described first transmission signal of expression, the frame frame synchronization information or the authentication information regularly of expression communication frame.

9, communicator as claimed in claim 1, wherein,

Described first generation unit and the described second generation unit production burst signal send signal and described second as described first and send signal,

Described adjustment unit adjustment sends regularly so that the described first transmission signal and described second sends signal and alternately arrives described communication counterpart.

10, communicator as claimed in claim 1, wherein,

Described second generation unit generates described first timing signal that sends signal and sends signal as described second,

Described adjustment unit adjustment sends regularly so that described first part that sends signal and the described second transmission signal arrives described specific zone in the identical moment.

11, communicator as claimed in claim 10, wherein,

Described timing signal is for being used for clock signal synchronous.

12, communicator as claimed in claim 1, wherein,

Described time difference calculating unit is with the described time difference of preset time interval calculation.

13, communicator as claimed in claim 1, wherein,

Also possess: notification unit, the communication counterpart that notice is positioned at described specific zone carries out the indication that move the position,

Described time difference calculating unit is based on described first time that transmits a signal to the zone of the described communication counterpart institute position that reaches after moving, and described second time that transmits a signal to the zone of the described communication counterpart institute position that reaches after moving, calculate the described time difference once more

Described adjustment unit was adjusted sending regularly based on the described time difference that calculates once more.

14, communicator as claimed in claim 1, wherein, at least one side of described first antenna and described second antenna sends to specific fixed object, described specific fixed object be fixed on described specific regional different direction on.

15, communicator as claimed in claim 1, wherein,

Also possess: converter unit, with described first signal that to send signal and the described second at least one side's frequency conversion that sends signal be different carrier frequency band.

16, communicator as claimed in claim 1, wherein,

Also possess: determination unit, measure first inhibit signal and second time of delay, described first inhibit signal and second time of delay is, described relatively first sends signal and described second and sends first inhibit signal that signal produces and second inhibit signal and be later than described first and send signal and described second and transmit a signal to the time that reaches till the described specific zone by the influence of multipath

Described first generation unit and described second generation unit send signal and described second and send signal based on generating described first time of delay and described second time of delay described first.

17, communicator as claimed in claim 1, wherein,

Described specific zone is the place of the regulation that is predetermined.

18, communicator as claimed in claim 1, wherein,

It is to have carried out the signal behind the differential coding that the described first transmission signal and described second sends signal.

19, a kind of communication means possesses:

The step of concatenating into the first transmission signal based on information data;

Generate the step of the second transmission signal, described second sends signal passes through to send signal combination with predetermined timing and described first, but makes the demodulation of described information data string;

Send the step of the described first transmission signal;

Send the step of the described second transmission signal: and

Described first transmission that sends at least one side of signal and the described second transmission signal is regularly adjusted, so that the described first transmission signal and described second sends signal arrives specific zone in predetermined timing step.

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