CN103069727B - Antenna switches receiving system and possesses the wireless communicator of this system - Google Patents

Abstract

There is provided a kind of and multiple antenna is switched to the antenna switching receiving system receiving wireless signal, switch in receiving system at this antenna, by while with specified period switched antenna while the quality of the wireless signal received compares, select the antenna for receiving payload.

Description

Antenna switches receiving system and possesses the wireless communicator of this system

Technical field

The present invention relates to a kind of switched antenna in a wireless communication system to carry out the antenna received and switch receiving system.

Background technology

In a wireless communication system, the level deterioration caused by multipath decline (MultipathFading) is listed as one of problem.The signal that reception antenna receives is not only the signal being directly inputted to reception antenna from transmitting antenna, also there is the signal inputted via multiple different path.Therefore, the signal (multipath) with different time of delay is also imported into reception antenna, thus coincides with one another at reception antenna end place signal, to cancel out each other etc. and to cause the deterioration of reception level.Here it is is called as the phenomenon of the level deterioration caused that to be declined by multipath.

As the representative countermeasure of impact for avoiding this level deterioration caused that to be declined by multipath, there is the Multicarrier Transmission Technology of OFDM etc.This is following technology: the information of transmission be divided into multiple carrier wave (subcarrier (subcarrier)) to transmit with wide frequency band, the impact of the level deterioration caused therefore, it is possible to reduction is declined by multipath.But, in ofdm transmission, need frequency axis and time shaft to be converted to the labyrinth processed by inverse fourier transform and Fourier transform, thus cause circuit scale to increase, therefore exist and be difficult to the shortcoming realizing cost degradation.

In addition, there is the countermeasure of " the synthesis diversity " of synthesizing based on " switched diversity (diversity) ", " selection diversity " that switch multiple antenna or the Received signal strength by each antenna.The impact that these countermeasures make use of multipath decline is different according to the position of receiver, the plane of polarization of electric wave etc." selection diversity " be monitor in advance multiple antenna reception level and by the technology of best antenna receiving signal, but there is the shortcoming that circuit scale becomes large owing to needing the receiver of the number suitable with the number of antenna.In addition, " synthesis diversity " makes the phase place of the signal received by multiple antenna unanimously carry out the technology of synthesizing, but also there is the shortcoming that circuit scale becomes large owing to needing the receiver of the number suitable with the number of antenna and make the consistent phase shifter of the phase place of each signal.

" switched diversity " is following a kind of technology (for example, referring to patent documentation 1): in an antenna, have multipath to decline affect, by switch to another antenna reduce multipath decline impact.In recent years, due to the universal of portable radio machine, miniaturization, cost degradation are also required to antenna switching part, develop owing to can be made up of a receiver easily and circuit scale little and " switched diversity " that can realize cost degradation be equipped in various wireless device.

Patent documentation 1: Japanese Unexamined Patent Publication 06-303218 publication

But, in " switched diversity ", the unclear reception level switching the antenna of destination before switched antenna.Therefore, there is following shortcoming: if the reception level switching the antenna place of destination is lower, then Received signal strength under worse condition of having to.

And, in wireless lans, during to receive multiple bag (frame: a piece of signal being formed preamble (preamble), unique word (uniqueword), payload (payload)) and mistake detected in multiple bag, the system of switched antenna is basic, namely switches to substantially with the antenna after mistake occurs.For occurred mistake, again send identical bag by request transmitter and deal with (resending function).But, increase resending number of times under the situation of communication environment difference due to multipath decline, thus be unsuitable for needing carrying out communicate with multiple equipment equipment also receiving new payload signal successively or the needs receiving sound, image etc. receive the equipment of new payload signal successively with high speed.

The present invention completes to solve the problem.That is, its object is to provide a kind of antenna also can correctly selecting signal quality good under the environment that multipath is many by simple structure to reduce and switch receiving system by the decline antenna of impact of the level change caused of multipath.

Summary of the invention

According to the 1st aspect of the present invention, there is provided a kind of and multiple antenna is switched to the antenna switching receiving system receiving wireless signal, this antenna switches receiving system by while with specified period switched antenna while the quality of the wireless signal received compares, and selects the antenna for receiving payload.

Switch in receiving system at the antenna based on first method, preferably, possess: antenna control part, it controls the switching of antenna; Unique word configuration part, it presets and stores the bit string of known unique word; Unique word test section, it while the bit string of the wireless signal received is searched for, detects the bit string identical with the unique word stored by above-mentioned unique word configuration part to switched antenna; And signal quality comparing section, quality by the wireless signal received by each antenna compares by it, wherein, when above-mentioned unique word test section detects unique word, above-mentioned antenna control part selects the result compared by above-mentioned signal quality comparing section to be judged as the antenna of signal quality the best, the payload after receiving.

Switch in receiving system at the antenna based on first method, preferably, from the transmitting system of correspondence, sent with specific order the multiple unique words comprising different bit strings before payload, preset by above-mentioned unique word configuration part and store the multiple unique words identical with the multiple unique words sent from above-mentioned transmitting system, above-mentioned unique word test section is independently to multiple unique word test sections that above-mentioned multiple unique word detects, when above-mentioned multiple unique word test section detects the unique word of regulation, above-mentioned antenna control part selects the antenna being judged as signal quality the best.

Switch in receiving system at the antenna based on first method, preferably, above-mentioned signal quality comparing section has the horizontal comparing section of reception, and the level of the wireless signal received by each antenna compares by the horizontal comparing section of this reception.

Switch in receiving system at the antenna based on first method, preferably, above-mentioned signal quality comparing section has unique word error number comparing section, and the error number of the bit string of the wireless signal received by each antenna relative to the bit string of the unique word stored in above-mentioned unique word configuration part compares by this unique word error number comparing section.

Switch in receiving system at the antenna based on first method, preferably, from the transmitting system of correspondence, sent before each unique word and be used for setting up bit synchronous preamble, above-mentioned unique word error number comparing section is the preamble and unique word error number comparing section that the bit string of the wireless signal received by each antenna are compared relative to the error number of the bit string of preamble and unique word.

Switch in receiving system at the antenna based on first method, preferably, also possesses the first counter, first stipulated time of this first counter to the reception interval as the unique word in a bag counts, when above-mentioned unique word test section detects unique word from the wireless signal received by some antennas, above-mentioned first counter starts counting, and when counting down to the reception interval of unique word, from the signal received by other antenna, detects next unique word.

Switch in receiving system at the antenna based on first method, preferably, also possesses the second counter, this second counter counts the second stipulated time after switched antenna, after switched antenna, before above-mentioned second counter counts counted to for the second stipulated time, do not carry out the detection of unique word.

Switch in receiving system at the antenna based on first method, preferably, also possesses end-of-packet test section, the end of this end-of-packet test section to bag detects, when above-mentioned end-of-packet test section detects the end of bag, above-mentioned antenna control part automatically reverts to the control of specified period switched antenna, receives next bag.

Switch in receiving system at the antenna based on first method, preferably, also possess the 3rd counter, the 3rd counter counts the 3rd stipulated time after specific unique word being detected, does not carry out the detection of unique word before above-mentioned 3rd counter counts counted to for the 3rd stipulated time.

Switch in receiving system at the antenna based on first method, preferably, also possess and receive horizontal detection portion, this reception horizontal detection portion level to the wireless signal received detects, after above-mentioned reception horizontal detection portion detects the signal level of more than the first threshold of regulation, above-mentioned unique word test section starts the search of unique word.

Switch in receiving system at the antenna based on first method, preferably, also possess: select antenna storage part, it is stored in the information of the antenna selected by above-mentioned antenna control part when receiving payload; And notification unit, it is according to the information be stored in above-mentioned selection antenna storage part, when the continuous stipulated number of some antennas is selected by above-mentioned antenna control part, informs the user this meaning.

Switch in receiving system at the antenna based on first method, preferably, the preamble of 2 times that quantity is carried antenna number and unique word are sent out, and each antenna was switched with the cycle of 2 times in the transmission cycle of preamble and unique word.

Switch in receiving system at the antenna based on first method, preferably, also possess: receive level notice portion, it detects the level of the wireless signal received, and informs user; And handoff functionality configuration part, it is for being set by the user the invalidating of antenna switching function.

Switch in receiving system at the antenna based on first method, preferably, also possess: receive horizontal detection portion, it detects the level of the wireless signal received; And handoff functionality control part, it, when above-mentioned reception horizontal detection portion detects the signal level of more than the Second Threshold of regulation, makes antenna switching function be invalid.

Switch in receiving system at the antenna based on first method, preferably, when making antenna switching function be invalid in above-mentioned handoff functionality configuration part or handoff functionality control part, the transmitting system to correspondence notifies this meaning.

Switch in receiving system at the antenna based on first method, preferably, when under the state that antenna switching function is invalid, continuous 4th stipulated time cannot detect unique word, above-mentioned handoff functionality configuration part or handoff functionality control part make antenna switching function be effective.

Switch in receiving system at the antenna based on first method, preferably, when successfully receiving payload, the transmitting system to correspondence sends the ACK (Acknowledgement: response) of this meaning.

Switch in receiving system at the antenna based on first method, preferably, under the state that antenna switching function is invalid, also make antenna switching function be effective termly.

In addition, provide a kind of wireless communicator, this wireless communicator possesses: above-mentioned antenna switches receiving system; And sending part, it sends wireless signal, and wherein, after receiving payload, when above-mentioned sending part sends wireless signal, above-mentioned antenna control part is used in antenna selected when receiving payload.

According to the 2nd aspect of the present invention, there is provided a kind of and multiple antenna is switched to the antenna switching receiving system receiving wireless signal, this antenna switched receiving system before reception payload signal, selecting the antenna for receiving payload signal by each antenna reception test signal, is be switched according to the antenna switching timing detection signal detected before above-mentioned test signal for receiving the antenna of above-mentioned test signal.

Switch in receiving system at the antenna based on second method, preferably, above-mentioned antenna switching timing detection signal is made up of and the signal be sent out the signal train of particular arrangement, above-mentioned antenna switches receiving system to be had: storage part, and it stores the signal train of the arrangement identical with the above-mentioned antenna switching timing detection signal be sent out; And correlation value calculation section, it calculates the correlation of the signal train of the signal train be stored in above-mentioned storage part and received above-mentioned antenna switching timing detection signal, wherein, above-mentioned antenna switching timing detection signal is detected according to the correlation calculated by above-mentioned correlation value calculation section.

Switch in receiving system at the antenna based on second method, preferably, the above-mentioned antenna switching timing detection signal sent with transmission speed low compared with payload signal is detected.

Switch in receiving system, preferably, even if above-mentioned antenna switching timing detection signal does not rely on reception level and can carry out demodulation in the saturated condition yet at the antenna based on second method.

Switch in receiving system at the antenna based on second method, preferably, also possesses counter unit, this counter unit counted the time be timed to till the timing of next antenna switching benchmark from specific antenna switching benchmark, detects antenna switch benchmark timing according to the count value of above-mentioned counter unit.

Switch in receiving system at the antenna based on second method, preferably, above-mentioned antenna switching timing detection signal is sent out repeatedly in a frame, above-mentioned antenna switches receiving system and possesses the regular switch control portion of antenna, and the regular switch control portion of this antenna is every switched antenna specified time limit in the cycle of more than 2 times of the length of above-mentioned antenna switching timing detection signal.

Switch in receiving system at the antenna based on second method, preferably, after above-mentioned antenna switching timing detection signal being detected, do not carry out the detection of above-mentioned antenna switching timing detection signal in specified time limit.

Switch in receiving system at the antenna based on second method, preferably, unique word signal detected further after above-mentioned antenna switching timing detection signal being detected after, do not carry out the detection of above-mentioned antenna switching timing detection signal in specified time limit.

Switch in receiving system at the antenna based on second method, preferably, possesses counter unit non-detection time, this, counter unit was to not detecting that the time of above-mentioned antenna switching timing detection signal counts non-detection time, above-mentioned when non-detection time, counter unit count down to official hour in the process of being undertaken receiving by some antennas, switch to other antenna.

Switch in receiving system at the antenna based on second method, preferably, above-mentioned test signal is made up of and the signal be sent out the signal train of particular arrangement, above-mentioned storage part also stores the signal train of the arrangement identical with the above-mentioned test signal be sent out, above-mentioned antenna switches receiving system and also has the second correlation value calculation section, the correlation of this second correlation value calculation section to the signal train of the signal train of the test signal be stored in above-mentioned storage part and received above-mentioned test signal calculates, the correlation values detection that above-mentioned second correlation value calculation section calculates in basis receives payload signal to not carrying out antenna switching during above-mentioned test signal.

Switch in receiving system at the antenna based on second method, preferably, with the quantity of above-mentioned test signal, there is multiple above-mentioned second correlation value calculation section accordingly.

the effect of invention

According to the 1st aspect of the present invention, by with specified period switched antenna while the quality of the wireless signal received compares, select the antenna for receiving payload.Therefore, even if under the environment often multipath occurring, the selection of the antenna that can obtain the good Received signal strength of quality also can be completed for the signal non-synchronously receiving new bag successively before the payload receiving each bag.Thereby, it is possible to the generation of the reception mistake avoided causing the deterioration of reception level by multipath decline and cause.

In addition, according to the 2nd aspect of the present invention, before reception payload signal, receive by each antenna the antenna that test signal selects for receiving payload signal, therefore, it is possible to reduce the impact of the level change caused that to be declined by multipath by simple structure.Thus, even if the generation of the mistake also easily avoided causing the deterioration of reception level by multipath decline under multi-path environment and cause.

Accompanying drawing explanation

Object of the present invention and feature become clear by the explanation of following accompanying drawing and preferred embodiment.

Fig. 1 represents that the antenna based on the first execution mode of the present invention switches the block diagram of the structure of receiving system.

Fig. 2 represents that the antenna based on this execution mode switches the flow chart of the action of receiving system.

Fig. 3 is the figure representing the signal sent from the transmitting system of correspondence in this embodiment and the relation being switched the antenna that receiving system switches by antenna.

Fig. 4 represents that the antenna based on above-mentioned execution mode switches the block diagram of the structure of the variation of receiving system.

Fig. 5 is the flow chart of the action representing above-mentioned variation.

Fig. 6 represents that the antenna based on above-mentioned execution mode switches the block diagram of the structure of another variation of receiving system.

Fig. 7 is the flow chart of the action representing this variation.

Fig. 8 represents the signal that sends from the transmitting system of correspondence in this variation and the figure of an example being switched the relation of the antenna that receiving system switches by antenna.

Fig. 9 represents the signal that sends from the transmitting system of correspondence in this variation and the figure of another example of relation being switched the antenna that receiving system switches and the signal received by each antenna by antenna.

Figure 10 represents that the antenna based on above-mentioned execution mode switches the block diagram of the structure of the another variation of receiving system.

Figure 11 is the flow chart of the action representing this variation.

Figure 12 represents that the antenna based on above-mentioned execution mode switches the block diagram of the structure of the another variation of receiving system.

Figure 13 is the flow chart of the action representing this variation.

Figure 14 represents that the antenna based on above-mentioned execution mode switches the block diagram of the structure of the another variation of receiving system.

Figure 15 is the flow chart of the action representing this variation.

Figure 16 represents the signal that sends from the transmitting system of correspondence in this variation and the figure of relation being switched the antenna that receiving system switches and the signal received by each antenna by antenna.

Figure 17 represents that the antenna based on above-mentioned execution mode switches the block diagram of the structure of the another variation of receiving system.

Figure 18 is the flow chart of the action representing this variation.

Figure 19 represents the signal that sends from the transmitting system of correspondence in this variation and the figure of an example of relation being switched the antenna that receiving system switches and the signal received by each antenna by antenna.

Figure 20 represents that the antenna based on above-mentioned execution mode switches the block diagram of the structure of the another variation of receiving system.

Figure 21 is the flow chart of the action representing this variation.

Figure 22 represents that the antenna based on above-mentioned execution mode switches the block diagram of the structure of the another variation of receiving system.

Figure 23 is the flow chart of the action representing this variation.

Figure 24 represents the signal that sends from the transmitting system of correspondence in the structure of second counter without this variation and the figure of relation being switched the antenna that receiving system switches and the signal received by each antenna by antenna.

Figure 25 represents the signal that sends from the transmitting system of correspondence in the structure of second counter with this variation and the figure of relation being switched the antenna that receiving system switches and the signal received by each antenna by antenna.

Figure 26 represents that the antenna based on above-mentioned execution mode switches the block diagram of the structure of the another variation of receiving system.

Figure 27 is the flow chart of the action representing this variation.

Figure 28 represents that the antenna based on above-mentioned execution mode switches the block diagram of the structure of the another variation of receiving system.

Figure 29 is the flow chart of the action representing this variation.

Figure 30 is the figure representing bag and the relation of the 3rd stipulated time received by this variation in periodic communication.

Figure 31 is the figure representing bag and the relation of the 3rd stipulated time received by this variation in non-periodically communication.

Figure 32 represents that the antenna based on above-mentioned execution mode switches the block diagram of the structure of the another variation of receiving system.

Figure 33 is the flow chart of the action representing this variation.

Figure 34 is the figure of the relation of the pattern representing bag and the receiving system received by this variation etc.

Figure 35 represents that the antenna based on above-mentioned execution mode switches the block diagram of the structure of the another variation of receiving system.

Figure 36 is the figure representing bag and the relation of antenna selected during this bag of reception received by this variation.

Figure 37 represents that the antenna based on above-mentioned execution mode switches the block diagram of the structure of the another variation of receiving system.

Figure 38 is the flow chart of the action representing this variation.

Figure 39 is the figure of the structure representing the bag that the transmitting system from correspondence when making antenna switching function effective by this variation and time invalid sends.

Figure 40 represents that the antenna based on above-mentioned execution mode switches the block diagram of the structure of the another variation of receiving system.

Figure 41 is the flow chart of the action representing this variation.

Figure 42 switches in the another variation of receiving system at the antenna based on above-mentioned execution mode to send and the example of the bag received by receiving system from the transmitting system of correspondence.

Figure 43 switches in the another variation of receiving system at the antenna based on above-mentioned execution mode to send and the example of the bag received by receiving system from the transmitting system of correspondence.

Figure 44 represents that application antenna of the present invention switches the figure of the summary of the wireless communication system that receiving system builds.

Figure 45 represents switch the antenna of the wireless device switching of receiving system by being provided with antenna and being received the figure of the relation between the signal sent by each antenna in a wireless communication system.

Figure 46 represents that the antenna based on the second execution mode of the present invention switches the block diagram of the Sketch of receiving system.

Figure 47 represents the figure switching the action of receiving system at this antenna above-mentioned antenna switched in receiving system when using the signal of two antennas receptions and receive this signal.

Figure 48 represents that this antenna switches the flow chart of the action of receiving system.

Figure 49 represents that the antenna based on above-mentioned execution mode switches the block diagram of the Sketch of the variation of receiving system.

Figure 50 is the figure that above-mentioned antenna when representing the signal that uses two antennas to receive in this variation and receive this signal switches the action of receiving system.

Figure 51 is the flow chart of the action representing this variation.

Figure 52 represents the figure switching the action of receiving system at this antenna above-mentioned antenna switched in another variation of receiving system when using the signal of two antennas receptions and receive this signal.

Figure 53 represents that this antenna switches the block diagram of the Sketch of the another variation of receiving system.

Figure 54 is the figure of the relation representing frame and the count value using two antennas to receive in this variation.

Figure 55 is the figure of another relation representing frame and the count value using two antennas to receive in this variation.

Figure 56 is the flow chart of the action representing this variation.

Figure 57 represents that this antenna switches the block diagram of the Sketch of the another variation of receiving system.

Figure 58 is the figure that above-mentioned antenna when representing the signal that uses two antennas to receive in this variation and receive this signal switches the action of receiving system.

Figure 59 is the flow chart of the action representing this variation.

Figure 60 represents that this antenna switches the block diagram of the Sketch of the another variation of receiving system.

Figure 61 is the figure that above-mentioned antenna when representing the signal that uses two antennas to receive in this variation and receive this signal switches the action of receiving system.

Figure 62 is the flow chart of the action representing this variation.

Figure 63 represents that this antenna switches the block diagram of the Sketch of the another variation of receiving system.

Figure 64 is the figure that above-mentioned antenna when representing the signal that uses two antennas to receive in this variation and receive this signal switches the action of receiving system.

Figure 65 is the flow chart of the action representing this variation.

Figure 66 represents that this antenna switches the block diagram of the Sketch of the another variation of receiving system.

Figure 67 is the figure that above-mentioned antenna when representing the signal that uses two antennas to receive in this variation and receive this signal switches the action of receiving system.

Figure 68 is the flow chart of the action representing this variation.

Embodiment

Below, the accompanying drawing with reference to the part forming this specification illustrates in greater detail embodiments of the present invention.In all of the figs same reference marker added to same or similar part and omit the description.

(the first execution mode)

Receiving system is switched in the antenna of the first execution mode of the present invention with reference to accompanying drawing Benq.Antenna switches receiving system and is built in the distribution board such as with radio communication function etc.This distribution board receives the instruction from the monitoring arrangement wireless transmission operated by manager, carrys out the information of wireless transmission power consumption etc.The monitoring arrangement display receiving the information of the power consumption sent from distribution board etc. distributes the current or accumulative power consumption etc. in the region of electric power by distribution board.Distribution board and monitoring arrangement have been endowed radio communication function and have suitably arranged to enable monitoring arrangement environmentally wait and move.

In the present embodiment, possess an antenna in monitoring arrangement, in distribution board, possess multiple antenna.Distribution board while by antenna switch receiving system select and switch be suitable for surrounding environment antenna, carry out stable radio communication between one side and monitoring arrangement.

Fig. 1 represents that antenna switches the structure of receiving system.Antenna switches receiving system and is made up of receiver 01 and multiple antenna 02 etc.Receiver 01 is made up of antenna switching part 03, RF (RadioFrequency: radio frequency) portion 04 and base band (baseband) portion 05 etc.

Antenna switching part 03 switches the antenna for receiving wireless signal from two antennas A, B forming antenna 02.RF portion 04 carries out down-conversion (downconvert) to the wireless signal using antenna A or B to receive, and extracts baseband signal.Base band part 05 processes the baseband signal extracted by RF portion 04.

Base band part 05 by demodulation section 06, synchronously set up portion 07, unique word configuration part 08, unique word test section 09 and antenna control part 10 etc. and form.Demodulation section 06 carries out demodulation to the baseband signal extracted by RF portion 04.Synchronously set up the bit synchronization that portion 07 sets up the baseband signal through demodulation.

Unique word configuration part 08 presets and stores the bit string of known unique word.Known unique word shares between corresponding transmitting system, sends the bag with this unique word from transmitting system.Unique word test section 09 searches for the baseband signal through demodulation, and detects the bit string of unique word.Antenna control part 10 carries out the control of antenna switching.That is, the testing result that obtains according to the bit string detecting unique word by unique word test section 09 of antenna control part 10, judges whether to want switched antenna, and exports the control signal being used for switched antenna to antenna switching part 03.In addition, present embodiment switches to two antennas the structure receiving wireless signal by antenna switching part 03, but the number of antenna also can be more than three.

Fig. 2 represents that antenna switches the action of receiving system.In addition, Fig. 3 represents the signal sent from the transmitting system of correspondence and the relation being switched the antenna that receiving system switches by antenna.Bag is made up of multipair preamble and unique word and the payload etc. that sends after multipair preamble and unique word.

Antenna switches receiving system while switch (#1), while receive the wireless signal (#2) sent from transmitting system with the cycle of regulation to antenna A, B.For received signal, down-conversion (#3) is carried out by RF portion 04, carry out demodulation (#4) by the demodulation section 06 of base band part 05, set up bit synchronization (#5) by synchronously setting up portion 07, and detect unique word (#6) by unique word test section 09.

Which now, respectively send that twice preamble and unique word make no matter can both receiving preamble and unique word at exchange-column shift antenna A, B to each antenna.In the present embodiment, owing to using two antennas, therefore preamble and unique word are sent out four times separately as shown in Figure 3.Like this, be equipped on antenna and switch the preamble of twice of the antenna number of receiving system and unique word is sent out, and each antenna switched with the cycle of 2 times in the transmission cycle of preamble and unique word.

Figure 3 illustrates following situation: the preamble that first time is sent out is not received because antenna is switched in its receiving course, the preamble that second time is sent out or unique word are not received because antenna B is subject to the impact of multipath decline.In this case, due to bit synchronization cannot be set up, unique word (repeating the circulation of "No" in #6) therefore cannot be detected.Then, the preamble that third time is sent out is not received because antenna is switched in its process received, and the preamble be sent out for the 4th time is received by antenna A, unique word detected after setting up bit synchronization.In this case, in #6 after the circulation of "No", by after this circulate in through "Yes" in #6, antenna is fixed as A (#7), the payload (#8) after receiving.

According to this antenna switch receiving system, by with specified period switched antenna while the quality of the wireless signal received compares, select the antenna for receiving payload.Therefore, even if under the environment often multipath occurring, also a day line options can be completed for the signal non-synchronously receiving new bag successively before the payload receiving each bag.Thereby, it is possible to the generation of the reception mistake avoided causing the deterioration of reception level by multipath decline and cause.

(variation)

Fig. 4 represents that the antenna based on above-mentioned execution mode switches the structure of the variation of receiving system.The system of this variation also possesses threshold value configuration part 11 relative to the system shown in Fig. 1.Threshold value configuration part 11 sets bit string about unique word with on one side switched antenna A, B while the conforming threshold value of the bit string of the wireless signal received.

Such as, when unique word is made up of the bit string of 32 (bit), sometimes due in the receiving course of unique word communication environment momentary variation etc. and have several position inconsistent in the bit string of unique word and the bit string of the wireless signal received.Even if in this case, as long as communication environment recovers before reception payload, just can receive payload no problemly.Therefore, in this variation, such as when the wireless signal received bit string relative to the mistake of the bit string of unique word allowed mostly be 2 most, set the threshold to 30.Thus, if the bit string of unique word and the bit string of the wireless signal received have more than 30 consistent, then unique word test section 09 is judged as unique word being detected.Like this, setting threshold is carried out according to the bit string of the wireless signal received relative to the tolerance bound angle value of the error number of the bit string of unique word.More particularly, the value that the figure place that the figure place from unique word deducts tolerance bound angle value obtains is set as threshold value.

Fig. 5 represents that the antenna based on this variation switches the action of receiving system.By synchronously setting up (#5) after portion 07 establishes bit synchronization, the bit string of the bit string of the unique word stored by unique word configuration part 08 with the wireless signal received compares by unique word test section 09.Now, when the figure place more than the threshold value set by threshold value configuration part 11 is consistent (#9: "Yes"), unique word test section 09 is judged as unique word being detected, and transfers to #7.On the other hand, when the figure place more than the threshold value set by threshold value configuration part 11 is inconsistent (#9: "No"), #2 is turned back to.

According to this variation, if the bit string of unique word has the position of more than threshold value consistent with the bit string of the wireless signal received, then unique word test section 09 is judged as unique word being detected.Thereby, it is possible to avoid the bag of the payload received to be left in the basket in the case where there no problemly: the momentary variation etc. that communication environment occurs in the receiving course of unique word, afterwards, before reception payload, communication environment recovers.The detection action of the unique word in this variation can be applied to the detection of the unique word in such as technical scheme 2.

(variation)

Fig. 6 represents that the antenna based on above-mentioned execution mode switches the structure of another variation of receiving system.The system of this variation applies the form that multiple unique word test section 12 is used as the unique word test section 09 in the system shown in Fig. 1.In addition, in this variation, also possess signal quality comparing section 13, this signal quality comparing section 13 detects the quality by the wireless signal received by each antenna and compares.

Fig. 7 represents that the antenna based on this variation switches the action of receiving system.In addition, Fig. 8 represents the signal sent from the transmitting system of correspondence and the example being switched the relation of the antenna that receiving system switches by antenna.In addition, Fig. 9 represents that the signal that sends from the transmitting system of correspondence is routine with another of relation being switched the antenna that receiving system switches and the signal received by each antenna by antenna.

In this variation, from the transmitting system of correspondence, specifically sequentially to send the multiple unique words be made up of different bit strings before payload.And, preset by unique word configuration part 08 and store the multiple unique words identical with the multiple unique words sent from corresponding transmitting system.That is, in fig .9, each unique word (UW1 ~ UW4) is made up of different bit strings.In addition, in the case of figure 8, also can be that unique word UW1 ~ UW3 is identical and only have unique word UW4 different.Multiple unique word test section 12 detects multiple unique word UW1 ~ UW4 independently.And, distribute different sky line options actions for each unique word detected by multiple unique word test section 12.

In the figure 7, by synchronously setting up (#5) after portion 07 establishes bit synchronization, when any one unique word in unique word UW1 ~ UW3 being detected by multiple unique word test section 12, implement the action (#13 ~ #32) preset.Describe this action after a while.

On the other hand, when multiple unique word test section 12 detects last unique word and unique word UW4 (#13, #22, #31: "No", #12: "Yes"), antenna is kept fixing, the payload (#8) after receiving.Figure 8 illustrates and receive unique word UW4 by antenna A and receive the situation of payload by antenna A.On the other hand, when multiple unique word test section 12 does not detect last unique word and unique word UW4 (#12: "No"), #2 is turned back to.Like this, in fig. 8, in order to the beginning location (Head of payload goes out), last unique word UW4 having been detected as long as can identify, therefore also can be that unique word UW1 ~ UW3 is identical and only have unique word UW4 difference.

Below the action of #13 ~ #32 is described.When being undertaken searching for by multiple unique word test section 12 and unique word UW1 (#13: "Yes") being detected, signal quality comparing section 13 detects the quality (#14) of received wireless signal.That is, the signal quality of unique word UW1 is detected.Then, after switched antenna (#15), multiple unique word test section 12 searches for unique word UW2 (#16), and when unique word UW2 being detected (#17: "Yes"), signal quality comparing section 13 detects the quality (#18) of unique word UW2.Further, the signal quality of unique word UW1 and unique word UW2 compares by signal quality comparing section 13, selects the antenna for receiving payload.As an example of this situation, the signal quality that figure 9 illustrates the unique word UW1 received by antenna A be better than the unique word UW2 received by antenna B signal quality thus again switched antenna cause antenna A receive the action of payload.

If after antenna switches, i.e. the signal quality of unique word UW2 good (#19: "No"), be then fixed as the antenna (#20) receiving unique word UW2, and transfer to #12.On the other hand, if before antenna switches, i.e. the signal quality of unique word UW1 good (#19: "Yes"), then switch to the antenna (#21) receiving unique word UW1, and transfer to #12.In addition, receive in #12 unique word UW4 be in order to carry out payload beginning location.

When unique word UW1 not detected by multiple unique word test section 12 (#13: "No"), carry out following action.When being undertaken searching for by multiple unique word test section 12 and next unique word UW2 detected (#22: "Yes"), signal quality comparing section 13 detects the quality (#23) of received wireless signal.That is, the signal quality of unique word UW2 is detected.Then, after switched antenna (#24), multiple unique word test section 12 searches for unique word UW3 (#25), and when unique word UW3 being detected (#26: "Yes"), signal quality comparing section 13 detects the quality (#27) of unique word UW3.Further, the signal quality of unique word UW2 and unique word UW3 compares by signal quality comparing section 13, selects the antenna for receiving payload.

If after antenna switches, i.e. the signal quality of unique word UW3 good (#28: "No"), be then fixed as the antenna (#29) receiving unique word UW3, and transfer to #12.On the other hand, if before antenna switches, i.e. the signal quality of unique word UW2 good (#28: "Yes"), then switch to the antenna (#30) receiving unique word UW2, and transfer to #12.

When unique word UW2 not detected by multiple unique word test section 12 (#22: "No"), carry out following action.When being undertaken searching for by multiple unique word test section 12 and unique word UW3 detected (#31: "Yes"), be fixed as the antenna (#32) receiving unique word UW3, and transfer to #12.On the other hand, when unique word UW3 not detected by multiple unique word test section 12 (#31: "No"), antenna do not fixed (that is, the state of the antenna switching of hold period) and transfer to #12.Like this, when unique word UW1 being detected, the signal quality of unique word UW1 and unique word UW2 compares by signal quality comparing section 13, when unique word UW2 being detected, is compared by the signal quality of unique word UW2 and unique word UW3.But, when unique word UW1, UW2 cannot be detected by an antenna by another antenna detection to unique word UW3 or UW4, because switched antenna becomes meaningless, therefore signal quality comparing section 13 does not carry out comparing by the level of each antenna.In addition, the impact being subject to transient noise etc. in #13, #22 is also considered and the situation that unique word UW1, UW2 cannot be detected.Therefore, also can be configured to: when unique word UW3 being detected by multiple unique word test section 12 in #31, switched antenna detects unique word UW4, and the signal quality of unique word UW3 and unique word UW4 is compared.In addition, also can be configured to: when unique word UW2 cannot be detected in #17, detect unique word UW3 or UW4, and the signal quality of unique word UW1 and unique word UW3 or UW4 is compared.Similarly, also can be configured to: when unique word UW3 cannot be detected in #26, detect unique word UW4, and the signal quality of unique word UW2 and unique word UW4 is compared.

In this variation, sent by multiple unique words identical with the multiple unique words stored in unique word configuration part before payload with same order, multiple unique word test section 12 detects multiple unique word UW1 ~ UW4 independently.Thereby, it is possible to distribute different sky line options actions for each unique word detected.

Such as, when the last unique word UW4 before being close to payload being detected, just can receive payload thereafter without the need to switched antenna.In addition, the quality of the signal received by each antenna compares by signal quality comparing section 13, and antenna control part 10 is selected to be judged as the better antenna of signal quality to receive payload.Thereby, it is possible to all the time by obtaining the antenna of the better Received signal strength of quality to receive payload.In addition, when being provided with the antenna be switched of more than three, the quality of the signal received by each antenna compares by signal quality comparing section 13, and selects the antenna being judged as signal quality the best to receive payload.

(variation)

Figure 10 represents that the antenna based on above-mentioned execution mode switches the structure of the another variation of receiving system.The horizontal comparing section 14 of system application reception of this variation is used as a form of the signal quality comparing section 13 in the system shown in Fig. 6.The horizontal comparing section of reception 14 detects the reception level of each antenna and compares.The reception level of antenna such as can obtain by detecting RSSI (ReceivedSignalStrengthIndication: received signal strength indicator).

Figure 11 represents that the antenna based on this variation switches the action of receiving system.By synchronously setting up (#5) after portion 07 sets up bit synchronization, when unique word UW1 or UW2 being detected by multiple unique word test section 12 (#33: "Yes"), the reception level of the horizontal comparing section 14 of reception to antenna unique word being detected detects (#34), and switched antenna (#35).In addition, when multiple unique word test section 12 cannot detect unique word UW1 or UW2 (#33: "No"), #2 is turned back to.When have switched antenna, the reception level of the horizontal comparing section 14 of reception to the antenna after switching detects (#36), and carries out the comparison (#37) of reception level.Its result, if the reception level good (#37: "Yes") before antenna switching, then switches in #33 the antenna (#21) receiving unique word UW1 or UW2, and transfers to #8.On the other hand, if antenna switch after reception level good (#37: "No"), then not switched antenna and be fixed (#20), and transfer to #8.

In this variation, owing to carrying out the comparison of reception level after unique word UW1 or UW2 being detected, therefore, it is possible to get rid of the impact of the disturbing wave sent from the equipment beyond the transmitting system of correspondence.In addition, as long as possess the wireless IC (IntegratedCircuit: integrated circuit) of RSSI testing circuit, just can easily reception level be detected, be compared, therefore without the need to carrying out complicated control, exploitation becomes easy, and the cost that can realize system reduces.

(variation)

Figure 12 represents that the antenna based on above-mentioned execution mode switches the structure of the another variation of receiving system.The system application unique word error number comparing section 15 of this variation is used as a form of the signal quality comparing section 13 in the system shown in Fig. 6.The error number of the bit string of the wireless signal received by each antenna relative to the bit string of the unique word stored in unique word configuration part compares by unique word error number comparing section 15.When multiple unique word test section 12 detects unique word, above-mentioned error number is counted.

Figure 13 represents that the antenna based on this variation switches the action of receiving system.By synchronously setting up (#5) after portion 07 sets up bit synchronization, when unique word UW1 or UW2 being detected by multiple unique word test section 12 (#33: "Yes"), the error number of unique word error number comparing section 15 pairs of unique words detects, and switched antenna (#38).In addition, when multiple unique word test section 12 cannot detect unique word UW1 or UW2 (#33: "No"), #2 is turned back to.

When unique word UW1 or UW2 being detected, the error number of unique word error number comparing section 15 to the unique word in the antenna after switching detects (#39).Then, the error number switching the unique word that front and back detect at antenna compares (#40) by unique word error number comparing section 15.Its result, if the error number less (#40: "Yes") before antenna switching, then switches to the antenna (#21) receiving unique word UW1 or UW2 in #33, and transfers to #8.On the other hand, if antenna switch after error number less (#40: "Yes"), then not switched antenna and be fixed (#20), and transfer to #8.

In this variation, the selection of antenna is carried out according to the testing result of the error number of the bit string of unique word, even if therefore when being subject to the impact of disturbing wave of the transmitting system beyond from communication counterpart and reception level uprises, also can prevent from selecting antenna mistakenly.

(variation)

Figure 14 represents that the antenna based on above-mentioned execution mode switches the structure of the another variation of receiving system.The horizontal comparing section 14 of system application reception of this variation and unique word error number comparing section 15 are used as a form of the signal quality comparing section 13 in the system shown in Fig. 6.The horizontal comparing section of reception 14 detects the reception level of each antenna and compares.The reception level of antenna such as can obtain by detecting RSSI (ReceivedSignalStrengthIndication).The error number of the bit string of the wireless signal received by each antenna relative to the bit string of the unique word stored in unique word configuration part compares by unique word error number comparing section 15.When multiple unique word test section 12 detects unique word, above-mentioned error number is counted.

Figure 15 represents that the antenna based on this variation switches the action of receiving system.In addition, Figure 16 represents the signal that sends from the transmitting system of correspondence and the relation being switched the antenna that receiving system switches and the signal received by each antenna by antenna.

In fig .15, by synchronously setting up (#5) after portion 07 sets up bit synchronization, when unique word UW1 or UW2 being detected by multiple unique word test section 12 (#33: "Yes"), the reception level of the horizontal comparing section 14 of reception to antenna unique word being detected detects.In addition, the error number of unique word error number comparing section 15 pairs of unique words detects, and switched antenna (#41).In addition, owing to unique word UW1 or UW2 being detected in #33, therefore herein below the tolerance bound angle value of detected error number described in paragraph 0043.In figure 16, receive unique word UW1 by antenna A, the error number of unique word UW1 and the reception level of antenna A are detected, and switches to antenna B.In addition, when multiple unique word test section 12 cannot detect unique word UW1 or UW2 (#33: "No"), #2 is turned back to.

When unique word UW1 or UW2 being detected, the error number of unique word error number comparing section 15 to the unique word in the antenna after switching detects, and the reception level of the horizontal comparing section 14 of reception to the antenna after switching detects (#42).In figure 16, receive unique word UW2 by antenna B, and the error number of unique word UW2 and the reception level of antenna B are detected.Then, compared by the tolerance bound angle value of unique word error number comparing section 15 by the error number detected in #42 and regulation, if error number is below tolerance bound angle value (#43: "Yes"), then the horizontal comparing section 14 of reception carries out the comparison (#37) of reception level.In this case, the error number detected in #41 and #42 is below tolerance bound angle value.

Then, if the result of the comparison of the level of reception as shown in Figure 16 for before antenna switching, i.e. the reception level of unique word UW1 good (#37: "Yes"), then switch to the antenna (#21) receiving unique word UW1, and transfer to #8.On the other hand, if antenna switch after, i.e. the reception level of unique word UW2 good (#37: "No"), be then fixed as the antenna B (#20) receiving unique word UW2, and transfer to #8.

In addition, when unique word UW2 being detected at first in #33, after antenna switches (#41), the error number of unique word UW3 and reception level are detected (#42).In addition, when unique word UW3 or UW4 being detected at first, antenna switching (not recording in Figure 15) is not carried out.

Though can judge that the probability of the antenna that signal quality is good does not reach 100% by the error number detected in #41, #42 being compared, the level (level) being enough to practical application reached to a certain degree can be expected.Such as, probability exists following situation: although the reception level of antenna A very high and reception that is antenna B is on close level allowable limit, but the error number of the bit string relative to the unique word received by antenna A, the error number of this bit string received by antenna B is less.But, when this probability is low to moderate the degree that problem can not occur, also when error number is different, the antenna that error number is few can be selected, only when error number is identical, reception level compared and selects antenna.

In this variation, the level of the wireless signal received by multiple antenna and the error number these two of the bit string of wireless signal that received by each antenna are compared, is fixed as best antenna to receive payload.Thus, such as, even if when the reception level of an antenna very high and the reception of another antenna is on close level, when allowable limit, in this another antenna, the bit string of unique word does not make a mistake time, also relatively can carry out correct sky line options by what carry out reception level.In addition, even if when the error number of the bit string of the wireless signal received by each antenna is equal, also relatively correct sky line options can be carried out by what carry out reception level.In addition, not only carry out the comparison of reception level, go back and use the testing result of the error number of the bit string of unique word to carry out a day line options, therefore, it is possible to prevent the impact of the disturbing wave owing to being subject to the transmitting system beyond from communication counterpart and select antenna mistakenly.

(variation)

Figure 17 represents that the antenna based on above-mentioned execution mode switches the structure of the another variation of receiving system.The system application preamble of this variation and unique word error number comparing section 16 are used as a form of the signal quality comparing section 13 in the system shown in Fig. 6.The error number of the bit string of the wireless signal received by each antenna relative to the bit string of preamble and unique word compares by preamble and unique word error number comparing section 16.Above-mentioned error number detects unique word at multiple unique word test section 12 and is detected after switched antenna.

Figure 18 represents that the antenna based on this variation switches the action of receiving system.By synchronously setting up (#5) after portion 07 sets up bit synchronization, when unique word UW1 or UW2 being detected by multiple unique word test section 12 (#33: "Yes"), switched antenna (#35).Then, preamble and unique word error number comparing section 16 detect (#44) the error number not only comprising the preamble that next unique word also comprises before this unique word.In Figure 19, after unique word UW1 being detected by antenna A, switched antenna, is detected the error number of preamble and unique word UW2 by antenna B.Then, then switched antenna (#45), in the same manner as #44, preamble and the error number of unique word error number comparing section 16 to next preamble and unique word detect (#46).In Figure 19, after again switching to antenna A, the error number of preamble and unique word UW3 is detected.Further, the error number of the preamble that preamble and unique word error number comparing section 16 detect before and after being switched by antenna and unique word compares (#47), selects the antenna (#20, #21) for receiving payload.In Figure 19, the preamble received by antenna A and the error number of unique word few, thus be fixed as antenna A to receive payload.

In addition, in the example shown in Figure 19, be reason based on following by comprising that unique word UW2 and unique word UW3 compares by preamble paired separately.That is, be because because the preamble paired with unique word UW1 does not set up bit synchronization, therefore cannot differentiate " 0 " or " 1 ", thus cannot be used for the comparison of error number.In addition, when unique word UW2 being detected when unique word UW1 cannot be detected, comprise preamble paired separately and the error number of unique word UW3 and unique word UW4 is compared.When unique word UW3 or UW4 being detected, do not carry out antenna switching.In addition, in Figure 19, also after unique word UW1 being detected by antenna A, the error number detecting preamble and unique word UW2 can be continued, after switching to antenna B afterwards, the error number of preamble and unique word UW3 detected.

In this variation, the error number of the bit string of the wireless signal received by each antenna relative to the known bit string of preamble and unique word is compared, to select and the minimum antenna of fixed error number receives payload.Therefore, the figure place used in the selection of antenna increases, thus further improves the accuracy of sky line options judgement.Such as, when the bit string of preamble be 128, the bit string of unique word be 32, can detect relative to they being carried out add up to the error number of 160 that obtain and the selection carrying out antenna, thus can more accurate judgement be carried out.

(variation)

Figure 20 represents that the antenna based on above-mentioned execution mode switches the structure of the another variation of receiving system.The system application unique word error number comparing section 15 of this variation is used as a form of the signal quality comparing section 13 in the system shown in Fig. 6.In addition, in this variation, the first counter 17 is also possessed.First counter 17 to and be positioned at across preamble the first suitable stipulated time of the reception interval of unique word at two ends of this preamble (one wrap certain unique word detected after time to receiving the beginning of next unique word) count.

In Fig. 3, Fig. 8, Fig. 9, Figure 16 and Figure 19 etc., because the bit string forming each preamble is identical, its figure place is identical, and therefore each unique word is sent out from the transmitting system of correspondence at the same time.Thus, after certain unique word being detected, counted by the transmitting time of the first counter 17 pairs of preambles, the first namely suitable with the reception interval of unique word stipulated time, the beginning location of next unique word can be carried out thus.

Figure 21 represents that the antenna based on this variation switches the action of receiving system.When unique word UW1 or UW2 being detected by multiple unique word test section 12 (#33: "Yes"), the error number of unique word error number comparing section 15 pairs of unique words detects, and switched antenna (#38).Then, first counter 17 starts and continues to carry out counting (#48, #49, #50: "No"), when having carried out counting to first stipulated time suitable with the transmitting time of preamble (#50: "Yes"), be considered as the reception starting next unique word.Meanwhile, multiple unique word test section 12 pairs of unique words detect, and the error number of unique word error number comparing section 15 pairs of unique words detects (#51).

Then, if the error number few (#40: "No") after antenna switching, be then fixed as the antenna (#20) after switching, and transfer to #8.In addition, if antenna switch before error number few (#40: "Yes"), then switched antenna (#21) again, and transfer to #8.

In this variation, the first counter 17 to from by an antenna detection to unique word timing count to by another antenna detection for the timing of unique word of comparing.Then, the bit string from this timing is considered as the bit string of next unique word by unique word error number comparing section 15, detects the error number of unique word.Thus, even if when due to the reception level of another antenna is low or the impact of the noise that produces of being subject to happening suddenly etc. and cannot to set up bit synchronization or unique word in next preamble be the level equal with noise, also can detect unique word according to the signal received by another antenna, and the error number of this unique word can be detected.

(variation)

Figure 22 represents that the antenna based on above-mentioned execution mode switches the structure of the another variation of receiving system.The system application unique word error number comparing section 15 of this variation is used as a form of the signal quality comparing section 13 in the system shown in Fig. 6.In addition, in this variation, the second counter 18 is also possessed.Second counter 18 counts the second stipulated time after switched antenna.At this, if the second stipulated time that the second counter 18 counts be at least by the transmitting system of correspondence send form unique word bit string needed for time.

Figure 23 represents that the antenna based on this variation switches the action of receiving system.In addition, Figure 24 represents the signal that sends from the transmitting system of correspondence in the structure of second counter 18 without this variation and the relation being switched the antenna that receiving system switches and the signal received by each antenna by antenna.In addition, Figure 25 represents the signal that sends from the transmitting system of correspondence in the structure of second counter 18 with this variation and the relation being switched the antenna that receiving system switches and the signal received by each antenna by antenna.

As shown in figure 24, suppose that the antenna that carries out the receiving timing T1 in the residue several (such as 1) of unique word UW1 switches to the situation of the antenna B being subject to weak impact from the antenna A that accepting state is good.At this, if antenna A accepting state before timing T1 is good, the error number of unique word UW1 is less than above-mentioned tolerance bound angle value.Say by reason, antenna B ought to detect the residue several of unique word UW1 owing to being subject to weak impact, but exist if remain several then can be accidentally consistent with the unique word stored in unique word configuration part 08 possibility.Now, unique word test section 09 is judged as unique word UW1 being detected according to the signal that the antenna B by " end " that receive unique word UW1 receives.After T2 switches to antenna A, unique word UW2 detected afterwards, but if there are above-mentioned several above mistakes in this process, then antenna control part 10 can select antenna B be used as receiving the antenna of payload mistakenly., because antenna B is subject to weak impact as described above, the result made a mistake in the reception of payload is therefore caused.

The generation of the problems referred to above also results from unique word test section 09 and is judged as receiving this unique word by the antenna at " end " that receive certain unique word.But, even unique word test section 09 is judged as that the antenna by " beginning " that receive certain unique word receives the structure of this unique word, because the difference of the switching timing of antenna also can produce same problem.

Therefore, in this variation, after switched antenna, before the second counter 18 count down to the stipulated time, do not carry out the detection (it is invalid the testing result of unique word to be set to) of unique word, prevent the above-described problem from occurring thus.

That is, in fig 23, when have switched antenna in #1, after by the second counter resets (#52), starting and continuing to carry out counting (#53), and transferring to #2, thus receiving wireless signal.Afterwards, after down-conversion, demodulation, synchronous action of setting up (#3 ~ #5), when the count value of the second counter and the figure place of unique word consistent time (#53 2: "Yes"), transfer to #13.Later identical with Fig. 7 about the action of #13 to #32, but in this variation, when carrying out the comparison of the signal quality in #19, #28, the error number of the unique word detected in application #14, #18, #23, #27 is used as the index of signal quality.Then, when unique word UW4 being detected in #12 (#12: "Yes"), receive payload (#8) by this antenna.When unique word UW4 not detected, before specified period arrives, (#53 3: "No") repeats the circulation of #2 ~ #53 3.Then, when specified period arrives (#12: "No", #53 3: "Yes"), turn back to #1 and carry out switched antenna, and repeat the circulation of #1 ~ #53 3.By like this, unique word UW4 detected, and receive payload (#8).In addition, #53 3 in specified period identical with the specified period in #1, be the cycle of 2 times in the transmission cycle of preamble and unique word.

In this variation, as shown in figure 25, even if when timing T1 switches to from the antenna A that accepting state is good the antenna B being subject to weak impact, also do not carry out the detection of unique word before the second counter 18 count down to for the second stipulated time.Thus, due to unique word UW1 can not be detected by antenna B, therefore the problem shown in Figure 24 can not be there is.Afterwards, unique word UW2, UW3 can not be detected by the antenna B being subject to weak impact.And, in the reception midway of unique word UW3, if the specified period that the antenna of #53 3 switches arrives and switched antenna, then unique word UW4 detected by antenna A, thus can payload be received.

Be configured in this variation: after switched antenna, before counting down to second stipulated time suitable with the time needed for the transmission of the bit string forming unique word by the second counter 18, do not carry out the detection of unique word.Thus, be close to the timing before remaining several by an antenna detection and be switched to the situation of another antenna even if run into, the accepting state also can avoiding being judged as another antenna is mistakenly better and select the generation of the problem of antenna with leading to errors.

(variation)

Figure 26 represents that the antenna based on above-mentioned execution mode switches the structure of the variation of receiving system.The system of this variation also possesses end-of-packet (packetend) test section 19 relative to the system shown in Fig. 1.The end of end-of-packet test section 19 to bag detects.The end of bag can be known by detecting at the end-of-packet signal of the end of payload such as apposition.In addition, when packet length for receiving system (or data length of payload) is known, also can count by the counter pair time suitable with packet length the end detecting bag.

Figure 27 represents that the antenna based on this variation switches the action of receiving system.When starting the reception of payload in #8, continue the reception (#54: "No") till detecting end-of-packet carrying out payload.When end-of-packet being detected (#54: "Yes"), turn back to #1, antenna control part 10 automatically reverts to the control of specified period switched antenna, and receives next bag.

In this variation, after the detection by end-of-packet detects finishing receiving of payload, automatically transfer to the periodic switching action of antenna to return to the search of unique word.Therefore, even if asynchronous with receiving system and also can revert to antenna switching action when receiving the new bag sent successively from transmitting system and suitably tackle in transmitting system.

(variation)

Figure 28 represents that the antenna based on above-mentioned execution mode switches the structure of the variation of receiving system.The system of this variation also possesses unique word error number comparing section 15 and the 3rd counter 20 relative to the system shown in Figure 12.3rd counter 20 counts the 3rd stipulated time last (before the payload) unique word in the bag that receiving detected at multiple unique word test section 12 after.

Because the data comprised in payload are arbitrary, therefore the bit string of payload and the consistent situation of the bit string of unique word considerably less.Therefore, in this variation, even if the detection or detect not carrying out unique word within the 3rd stipulated time receiving payload is also set to invalid, thus prevent error detection.

Figure 29 represents that the antenna based on this variation switches the action of receiving system.When multiple unique word test section 12 detects last unique word (#55: "Yes"), the 3rd counter 20 starts to count (#55 2).Then, after #7, #8, carry out at the 3rd counter 20 detection (being the circulation of "No" in #55 2, #7, #8, #56) not carrying out any unique word in the process counted.When the 3rd counter 20 count down to for the 3rd stipulated time (#56: "Yes"), stop the counting of the 3rd counter 20, count value is resetted and turns back to #1.

Figure 30 and Figure 31 represents the bag and the relation of the 3rd stipulated time that are received by this variation.Figure 30 represents periodic communication, and Figure 31 represents non-periodically communication.Such as, the reception interval of wrapping in periodic communication is known, if the 3rd stipulated time be the unique word receiving certain bag after to being close to the time received before next bag.In addition, when not knowing the reception interval of bag in the non-periodically communication shown in Figure 31, the time of the payload in this bag of reception risen after receiving unique word of certain bag can be set to for the 3rd stipulated time.In this case, when the data length of payload is known, the time suitable with this data length was set to for the 3rd stipulated time.In addition, also can being configured to: when not knowing the data length of payload, being detected by above-mentioned end-of-packet test section 19 pairs of end-of-packet signals, to replace being counted the 3rd stipulated time by the 3rd counter 20.In addition, also can be configured to: multiple unique word test section 12 replaces detecting last unique word, and arbitrary specific unique word is detected, the 3rd stipulated time comprised from the time detected this unique word to the beginning of the payload in this bag is counted.

Be configured in this variation, after the detection of unique word, within the 3rd stipulated time, do not carry out the detection of unique word, therefore, it is possible to avoid mistakenly the bit string in payload being detected as unique word.In addition, owing to being configured to the detection also not carrying out unique word commitment defini interval is known in periodic communication during there is not Received signal strength, therefore can also to prevent noise error detection when not carrying out the transmission of self-corresponding transmitting system is unique word.

(variation)

Figure 32 represents that the antenna based on above-mentioned execution mode switches the structure of the variation of receiving system.The system of this variation also possesses reception horizontal detection portion 21 relative to the system shown in Fig. 1.Receive the level of horizontal detection portion 21 to the wireless signal received by some antennas to detect.

In this variation, receiving system has " low consumption pattern " and common " diversity reception (diversityreceive) pattern " these two kinds of patterns.In " low consumption pattern ", antenna switching part 03, RF portion 04, antenna control part 10 and reception horizontal detection portion 21 carry out action in the same manner as common " diversity reception pattern ", and other module is standby under the sleep state that power consumption is few.In " low consumption pattern ", when receiving horizontal detection portion 21 and the signal level of more than the first threshold of regulation being detected, receiving system is transferred to common " diversity reception pattern ".On the other hand, in common " diversity reception pattern ", when reception horizontal detection portion 21 does not detect the signal level of more than defined threshold within specified time limit, transfer to " low consumption pattern ".In addition, such as, carried out in the communication system of periodic communication once at one hour, also can be configured to automatically transfer to after this periodic communication terminates " low consumption pattern ".

Figure 33 represents that the antenna based on this variation switches the action of receiving system.In addition, Figure 34 represents the relation of the switching of bag and the pattern received etc.In fig. 33, even if carry out (#58) in the process of action in receiving system with " low consumption pattern ", also the control signal of the switching for carrying out antenna is exported from antenna control part 10 to antenna switching part 03, and with the cycle switched antenna (#1) of regulation.If fixed antenna in process standby under " low consumption pattern ", then when being subject to weak etc. impact, the reception level of this antenna is suppressed sometimes must be low, thus likely cannot transfer to " diversity reception pattern ".Therefore, in this variation, even if also with specified period switched antenna in the process of carrying out action with low consumption pattern, even if making to occur in process standby under " low consumption pattern " weakly also can not be subject to its impact (with reference to Figure 34).

Carrying out in the process of action with " low consumption pattern ", when receiving (#59: "Yes") when horizontal detection portion 21 detects the signal level of more than the first threshold of the regulation shown in Figure 34, receiving system is transferred to common " diversity reception pattern ", and performs the later action of #3.

In this variation, before reception level becomes more than first threshold, receiving system is standby with " low consumption pattern ", therefore, it is possible to reduce the current sinking of system.In addition, due under " low consumption pattern " also with the cycle switched antenna of regulation, thus can not be subject to weak impact and the wireless signal of the reception level of more than first threshold can be detected, thus can reliably transfer to " diversity reception pattern ".

(variation)

Figure 35 represents that the antenna based on above-mentioned execution mode switches the structure of the variation of receiving system.The system of this variation also possesses relative to the system shown in Fig. 1 selects antenna storage part 22 and notification unit 23.Antenna storage part 22 is selected to be stored in the antenna selected by antenna control part 10 when receiving payload.Notification unit 23 utilizes sound or light etc. to notify the information relevant to antenna to user's (comprising the manager of receiving system).

Figure 36 represents the relation of bag and the antenna selected during this bag of reception received by this variation.As shown in figure 36, relevant to the antenna selected by antenna control part 10 when the payload of receiving package (being antenna A in Figure 36) information is stored in be selected in antenna storage part 22.This meaning, with reference to selection antenna storage part 22, when have selected some antennas more than continuous stipulated number, is informed to user by notification unit 23.When shown in Figure 36, have selected the notice of the meaning of antenna A continuously.In addition, also can not specify selected antenna and only notify to have selected continuously the meaning of an antenna.

In this variation, when using some antennas to have received payload more than continuous stipulated number, this meaning is informed to user.Do not have the effect of diversity or an antenna etc. to there occurs fault therefore, it is possible to make user know, and equipment moving can be made to the high position of the effect of diversity or antenna etc. is placed under repair.

(variation)

Figure 37 represents that the antenna based on above-mentioned execution mode switches the structure of the variation of receiving system.The system of this variation also possesses reception level notice portion 24 relative to the system shown in Fig. 1 and diversity starts/close (on/off) switching part (handoff functionality configuration part) 24 they (2).Receive the level of level notice portion 24 to received wireless signal to detect, and utilize sound or light etc. to give notice to user.This notice both can be carried out as required, also can carry out according to the requirement from user.It is arrange to make user manually set startup (the effectively)/closedown (invalid) of antenna switching function that diversity starts/close switching part 24 they (2).User by confirming the notice from receiving level notice portion 24 and exporting, and starts/closes switching part 24 they (2) to diversity as required and operate, and manually can set the invalidating of diversity and antenna switching function.

Figure 38 represents that the antenna based on this variation switches the action of receiving system.First, receive the level of level notice portion 24 to received wireless signal and detect, and use sound or light etc. to give notice (#60) to user.Know that the user operation diversity of reception level starts/close switching part 24 they (2) by notifying according to this, when diversity feature is closed (#60 2: "No"), under the state of fixed antenna, receive wireless signal (#61).On the other hand, when being started diversity feature by user (#60 2: "Yes"), with fixing cycle switched antenna while receive wireless signal (after #1).

Figure 39 represents the structure of the bag that the transmitting system from correspondence when making antenna switching function effective and time invalid sends.When being effective when making antenna switching function, the unique word of 2 times of antenna number and the preamble paired with it are sent by apposition.On the other hand, when being invalid when making antenna switching function, as long as apposition preamble and unique word.Its result, packet length shortens, and efficiency of transmission improves.In addition, in this variation, sending function added to receiving system and receiving function is added to the transmitting system of correspondence, can notify that the invalidating of antenna switching function identifies to make it to transmitting system thus.

In this variation, receive level notice portion 24 owing to possessing, therefore user can receive level from the exterior monitoring of receiving system, manually can set the invalidating of antenna switching function.Therefore, such as receiving under the very high communication environment of level, it is invalid to be set as by antenna switching function, can reduce power consumption.Now, the transmitting system notice to correspondence makes antenna switching function be the invalid meaning and makes it identify, thus as shown in figure 39, as long as transmitting system carries out sending for each bag apposition preamble and unique word.Thus, the bag number that time per unit can send increases, and can improve efficiency of transmission.In addition, therefore the time of reception of receiving system also by cripetura, therefore also can contribute in the further low consumption electrification of receiving system.In addition, making antenna switching function be the notice of the invalid meaning is such as realized by the structure suitable with wireless device 200 with wireless device 100 described later.In addition, even if when also worrying the change of the surrounding enviroment such as the configuration of barrier large under the communication environment that reception level is very high and communication abnormality occur, can select according to object, such as, pay attention to the reliability that communicates and antenna switching function be redefined for effectively etc.

(variation)

Figure 40 represents that the antenna based on above-mentioned execution mode switches the structure of the variation of receiving system.The system of this variation also possesses reception horizontal detection portion 21 relative to the system shown in Fig. 1 and diversity starts/close (on/off) control part (handoff functionality control part) 25.Receive horizontal detection portion 21 in the same manner as shown in Figure 32, the level of the wireless signal received by some antennas is detected.Diversity startup/closing control portion 25 is according to the reception level detected by reception horizontal detection portion 21, and it is invalid to be automatically set to by antenna switching function.That is, when the signal level of more than the Second Threshold being just enough to the regulation receiving wireless signal without the need to switched antenna being detected by reception horizontal detection portion 21, diversity startup/closing control portion 25 automatically makes antenna switching function be invalid.

Figure 41 represents that the antenna based on this variation switches the action of receiving system.While with cycle switched antenna A, B (#1) of regulation, receive the wireless signal (#2) sent from transmitting system, receive the level of horizontal detection portion 21 to received wireless signal and detect.When the signal level of more than Second Threshold being detected (#62: "Yes"), in the forward direction transmitting system notice receiving next bag, antenna switching function is set to the invalid meaning (#63), and automatically make antenna switching function be invalid (#64), under the state that antenna is fixing, receive next bag (#65).Notified transmitting system sends for each bag apposition preamble and unique word UW as shown in figure 39, thus improves efficiency of transmission.On the other hand, when the signal level of more than Second Threshold not detected, making antenna switching function be maintained effective, and shifting to #3 later.In addition, above only carry out horizontal detection, but carry out horizontal detection, the reliability of improving the standard when detecting after such as also the signal that should receive or can being judged as YES after UW being detected.

In this variation, when the signal level of more than the Second Threshold being just enough to reception wireless signal without the need to switched antenna being detected by reception horizontal detection portion 21, diversity startup/closing control portion 25 automatically makes antenna switching function be invalid.Thus, when obtaining good communication environment, user unconsciously just can automatically realize low consumption electrification.In addition, as long as corresponding transmitting system carries out sending for each bag apposition preamble and unique word UW.Thus, efficiency of transmission can be improved.

(variation)

Switch in the variation of receiving system at the antenna shown in Figure 37 or Figure 40, also can be configured to: under the state that antenna switching function is invalid, when continuous 4th stipulated time cannot detect unique word, handoff functionality control part makes antenna switching function be effective.In this case, even if when causing communication environment to change at layout changing because of barrier and even transmitting system or receiving system etc., also because antenna switching function automatically reverts to effective state, therefore, it is possible to tackle.

Can also being deformed into: when successfully receiving payload, the transmitting system of correspondence being sent to the ACK of this meaning.In this case, transmitting system, when the continuous stipulated time cannot receive above-mentioned ACK, can know that receiving system receives payload failure.

Now, when like that transmitting system is by being set to a preamble and unique word UW and cripetura data length as shown in figure 42, preamble and the unique word UW of 2 times of number of transmit antennas is switched to.Thus, receiving system can automatically make antenna switching function effectively play function, thus can again revert to following state: can avoid is declined by multipath causes the deterioration of reception level thus causes receiving wrong generation.In addition, the transmission of ACK is such as realized by the structure suitable with wireless device 200 with wireless device 100 described later.

(variation)

In addition, switch at the antenna shown in Figure 37 or Figure 40 in the variation of receiving system, also can be deformed into: even if also termly this antenna switching function is switched to effectively when antenna switching function is set to invalid.

In this case, as shown in figure 43, receiving system makes antenna switching function be effectively receive every specified time limit termly, is fixed as in addition and is received by the antenna selected by its nearest antenna switching action.In the figure, be fixed as some antennas in bag 1 after, until make antenna switching function be invalidly fix antenna in during completing the reception of bag P, before the preamble receiving next bag P+1, antenna switching function is made to be effective.By repeating this action, compared with using the situation of antenna switching function all the time, can power consumption be reduced, and owing to selecting antenna termly by regular diversity communication, therefore can also follow the environmental change of layout changing etc.

(the structure example of communication system)

The summary of the wireless communication system that Figure 44 represents application antenna switching receiving system of the present invention and builds.Figure 45 represents in a wireless communication system by the relation being provided with antenna and switching the antenna that the wireless device of receiving system carries out switching and the signal being received by each antenna and sent.

Wireless communication system is made up of wireless device 100 and wireless device (wireless communicator) 200 etc.Wireless device 100 is such as built in monitoring arrangement.Wireless device 200 is such as built in distribution board etc.Antenna of the present invention is installed in wireless device 200 in the lump and switches receiving system and two antennas A, B.Corresponding transmitting system and an antenna are arranged in wireless device 100 in the lump.Wireless device 100 at the enterprising Serial Communication of twocouese, is therefore separately installed with transmitting system and receiving system with wireless device 200.

Communication between the two by sending wireless signal from wireless device 100 to wireless device 200 and coming, and replys wireless signal from wireless device 200 to wireless device 100.Now, wireless device 200, by employing the switched diversity function of two antennas A, B, selects the antenna being suitable for communication environment, and receives the payload of wireless signal.Further, when sending wireless signal from wireless device 200 to wireless device 100, antenna selected when receiving its previous (last) payload is used in.Such as, in Figure 45, be used in selected antenna A when receiving payload and send wireless signal from wireless device 200 to wireless device 100.The wireless device 100 receiving this wireless signal does not possess diversity feature, but by effectively utilizing the diversity feature that wireless device 200 possesses, can receive the wireless signal that the quality of the communication environment met between wireless device 100 and wireless device 200 is good.

In addition, in the selection of the antenna used when sending from wireless device 200, the antenna statistically receiving the payload of more bag in specific or not specific period in the past can also be selected.

According to the structure example of this communication system, in the reply after the diversity feature making wireless device 200 possess comes into force and receives, use antenna selected when receiving.Thus, when being started communication by the transmission from wireless device 100, as long as only arrange multiple antenna in another wireless device 200 and make it have diversity feature, just the effect of diversity can be obtained during two-way communication between while transmission and reception.

In addition, when the diversity feature only making wireless device 200 possess come into force send, need to carry out the transmission of the number of times suitable with the quantity of antenna., according to the structure example of this communication system, owing to determining the antenna that will use in transmission, as long as therefore use this antenna to send once.Thus, the reduction of the cripetura of transmitting time and the power consumption of wireless device 200 can be realized.

In addition, the present invention is not limited to the structure of above-mentioned execution mode.As long as be configured to major general while with specified period switched antenna while the quality of the wireless signal received compares the antenna selected for receiving payload.In addition, the present invention can carry out various distortion.Such as, antenna switches receiving system and is not limited to be applied to distribution board, also can be widely used in the various electrified products such as the bull switch with radio communication function.In addition, also the structure of appropriately combined each variation can build antenna and switch receiving system.Such as, in the variation shown in Figure 20, also can be configured to: also possess the horizontal comparing section 14 of reception shown in Figure 14, the error number these two of the level of wireless signal and bit string is compared, be fixed as best antenna to receive payload.In addition, also can be following simple structure: replace unique word error number comparing section 15 and possess the horizontal comparing section 14 of reception, the level of wireless signal being compared, is fixed as best antenna to receive payload.

(the second execution mode)

Switch receiving system with reference to accompanying drawing to the antenna based on the second execution mode of the present invention to be described.Figure 46 represents that antenna switches the Sketch of receiving system.Antenna switches receiving system 110 and forms by having the antenna part 111 of two antennas, antenna switching part 112, antenna switching timing test section 113 and antenna switching judging unit 114 etc.Antenna switching part 112 switches to any one antenna from two antennas.Antenna switching timing test section 113 such as by detecting the signal of more than prescribed level, detects the timing of antenna switching part 112 switched antenna.Antenna switching judging unit 114 is based on the RSSI (received signal strength) etc. of the signal received by some antennas via antenna switching part 112, select the antenna for receiving payload signal, and the control signal of this meaning is outputted to antenna switching part 112.Below, to being connected to antenna switching part 112 and the situation that the antenna be switched is two is described, but this antenna also can be more than three.

Figure 47 represents the action switching receiving system 110 at the antenna above-mentioned antenna switched in receiving system 110 when using the signal of two antennas, i.e. antenna A and antenna B reception and receive this signal.Example when particularly illustrating the initial antenna A of selection and receive test 1 signal by this antenna A.In addition, with flow chart, Figure 48 illustrates that the antenna of Figure 46 switches the action of receiving system 110.

Signal shown in Figure 47 is sent out from the transmitting system that the antenna of present embodiment switches receiving system 110 corresponding.At least send test 1 signal from transmitting system, test 2 signals and payload signal.By test 1 signal, test 2 signals and payload signal forms a frame.The unique word signal (not shown) for obtaining frame synchronization was sent before payload signal.

Test 1 signal and test 2 signals for selecting the antenna for receiving payload signal.Testing 1 signal is received by initial selected antenna, and testing 2 signals is received by the antenna after being switched.In addition, this test signal is the number of the antenna that basis is switched by antenna switching part 112 and suitably adds.Such as head (header) and image or sound and temperature is comprised and for the various data of the known signal train of being estimated multi-path environment by equalizer etc. or various control signal in payload signal.

With reference to Figure 47, Figure 48, the action that the antenna of the second execution mode switches receiving system 110 is described.Antenna switches receiving system 110 and is at first standby (#101).Antenna switches antenna part 111 Received signal strength (#102) of receiving system 110, when antenna switching timing test section 113 detects antenna switching timing (#103: "Yes"), the reception level of antenna switching judging unit 114 couples of antenna A detects (#104).At this, the detection of reception level is not limited to carry out according to RSSI, also can carry out according to magnification ratio when being amplified Received signal strength by automatic gain control circuit.Then, antenna switching judging unit 114 switches to antenna B (#105), and detects the reception level (#106) of antenna B.The switching of antenna carries out according to the antenna switching timing detected by antenna switching timing test section 113.Afterwards, the reception level of antenna A and the reception level of antenna B compare (#107) by antenna switching judging unit 114.When the reception level of antenna A is larger (#108: "Yes"), the antenna that antenna switching judging unit 114 selects antenna A to be used as receiving payload signal.That is, antenna switching judging unit 114 outputs to antenna switching part 112 (#109) by switching to the control signal of antenna A, and receives payload signal (#110) by antenna A.Example shown in Figure 47 is equivalent to this situation.When the reception level of antenna B is larger (#108: "No"), selection antenna B is used as the antenna for receiving payload signal.That is, antenna switching judging unit 114 is under the state being fixed as antenna B, receives payload signal (#111) by antenna B.In addition, when the reception level of antenna A is identical with the reception level of antenna B, payload signal (#111) is received by the antenna B finally receiving test signal.

In addition, in sky line options, also can not carry out the comparison of reception level, and represent that the parameter of the quality of signal compares with bit-errors number etc.

Receiving system 110 is switched according to this antenna, before reception payload signal, the antenna that test signal selects for receiving payload signal is received, therefore, it is possible to reduce the impact of the level change caused that to be declined by multipath by simple structure by each antenna.Thus, also can avoid being declined by multipath under multi-path environment causing the deterioration of reception level thus the generation that leads to errors.In addition, resend number of times by minimizing can realize closer to real-time transmission.In addition, when not needing to resend, not arranging and resending function, thus can also contribute to cost degradation and miniaturization.

(variation)

Figure 49 represents that the antenna of above-mentioned second execution mode switches the Sketch of the variation of receiving system 110.Switch in receiving system 110 at this antenna and apply the example that correlation value calculation section 115 is used as the antenna switching timing test section 113 of Figure 46.In addition, before test 1 signal, send the antenna switching timing detection signal be made up of the signal train of particular arrangement from transmitting system.Antenna switching timing detection signal is for detecting when receiving test 1 signal and test 2 signal the signal becoming the timing antenna of use being switched to the benchmark of antenna A or antenna B.Antenna switching timing detection signal sends with the transmission speed of the transmission speed lower than payload signal, also can comprise the preamble of bit synchronization before it.Correlation value calculation section (storage part) 115 stores the signal train (reference signal) of the arrangement identical with the antenna switching timing detection signal sent from transmitting system.As the example of signal train, enumerate 01100101011000101 ... Deng random signal or the bit string of the arrangement large with the difference of the arrangement of the fixing bit string in payload or correlation properties excellence M series or be similar to the signal train of this M series.Correlation value calculation section 115 calculates the correlation of stored signal train with the signal train of the antenna switching timing detection signal received.In this variation, detect antenna switching timing detection signal according to the correlation calculated by correlation value calculation section 115.

Figure 50 represents the action switching receiving system 110 at the antenna of this variation above-mentioned antenna switched in receiving system 110 when using the signal of antenna A and antenna B reception and receive this signal.In addition, with flow chart, Figure 51 illustrates that the antenna of this variation switches the action of receiving system 110.In this variation, replace the process of the #103 shown in Figure 48 and perform #112.

From transmitting system transmitting antenna switching timing detection signal, test 1 signal, test 2 signals and payload signal.Form the antenna switching timing detection signal of a frame, test 1 signal, test in 2 signals and payload signal, antenna switching timing detection signal sends with the transmission speed lower than other signal.The signal received by some antennas is compared with the reference signal stored by correlation value calculation section 115 with often staggering a sample (sample) (being 1 in this variation), and quantizing successively by making consistency calculates correlation.If consistency is more than the threshold value of regulation, be then judged as antenna switching timing detection signal (#112: "Yes") being detected, the reception level of antenna switching judging unit 114 couples of antenna A detects (#104).Following process is identical with Figure 48, therefore omits the description.

Switch receiving system 110 according to this antenna, it is undertaken by correlation values detection that the timing that antenna switches detects, therefore, it is possible to antenna switching timing detection signal and noise are more clearly distinguished, thus can strengthen the repellence for noise.In addition, as long as the judgement wanting the signal train implementing the position insertion antenna switching timing detection signal that antenna switches just can carry out antenna switching in arbitrary position, therefore, it is possible to improve the degree of freedom of frame structure.

In addition, owing to receiving the antenna switching timing detection signal sent with the transmission speed lower than payload signal, therefore, it is possible to avoid the impact of the intersymbol interference caused by multipath, and the energy of the signal of every 1 increases and reaches high sensitivity.Therefore, even if when have selected the antenna of the impact being subject to the reception level deterioration caused by the deterioration of the communication environment of multipath decline etc., also antenna switching timing detection signal can be detected without omission.Thus, even if when have selected the antenna of the impact being subject to the reception level deterioration caused by the deterioration of the communication environment of multipath decline etc., the selection of the antenna receiving payload signal also can be carried out exactly.Such as, the impact of the level deterioration caused even if initial selected antenna is subject to decline by multipath, also can by the less antenna reception payload of above-mentioned impact.Thereby, it is possible to avoid the reception mistake that the impact declining the level deterioration caused by multipath causes.

(variation)

(a) of Figure 52 represents and switches the antenna switching timing detection signal of the another variation of receiving system 110 and the example of signal (modulation signal) that sends as antenna.(b) of Figure 52 represents the example of the restituted signal after carrying out horizontal adjustment, and (c) of Figure 52 represents the example not carrying out the restituted signal of the saturation condition of horizontal adjustment.Receive the signal after also demodulation after being carried out horizontal adjustment by automatic growth control portion (not shown) by antenna part 111 and antenna switching part 112, be imported into correlation value calculation section 115.At this, when the impact of multipath decline is large, likely diminished by the restituted signal level after automatic growth control portion carries out gain control as shown in (b) of Figure 52.Therefore, this variation is configured to: such as by transmission signal being set to the binary signal of BPSK (BinaryPhaseShiftKeying: binary phase shift keying) etc., thus do not need to carry out gain control, also can carry out demodulation, detection in the saturated condition.

Switch in receiving system 110 at this antenna, by transmission signal is set to binary signal, even if when gain Received signal strength not being carried out automatic growth control portion controls and is input to correlation value calculation section 115, also owing to not relying on reception level as shown in (c) as Figure 52, therefore also demodulation can be carried out in the saturated condition.Thus, the impact of multipath decline can be reduced and suppress the deterioration of reception level.Its result, makes the detection probability of antenna switching timing detection signal improve, thus can reduce the probability that cannot carry out the switching of antenna.In addition, by the gain in automatic growth control portion is fixed as maximum, can rely on reception level yet and can carry out demodulation in the saturated condition yet.

(variation)

Figure 53 represents that the antenna of above-mentioned second execution mode switches the Sketch of the another variation of receiving system 110.It is in the antenna switching receiving system 110 of Figure 46, add counter unit 116 and form that this antenna switches receiving system 110.Counter unit 116 counts switching the time of benchmark timing to the timing of next antenna switching benchmark from specific antenna.Switch in receiving system 110 at antenna, detect next antenna switching timing benchmark according to the count value of counter unit 116.

Figure 54, Figure 55 represent the action switching in receiving system 110 signal (frame) and the counter unit 116 using antenna A and antenna B to receive at the antenna of this variation.Particularly, Figure 54 represent not with error with the situation of fixed cycle received frame, Figure 55 represents with error and not with the situation of fixed cycle received frame.In addition, with flow chart, Figure 56 illustrates that the antenna of this variation switches the action (particularly corresponding to the action of Figure 55) of receiving system 110.In this variation, replace the process of the #103 shown in Figure 48 and perform #113, #113-1, #114, #114-1.

Counter unit 116 is from starting counting at first by antenna switching timing test section 113 detects antenna switching timing detection signal.Then, count down to the count value N that the timing of the benchmark switched with the antenna becoming next frame is suitable, and by counter resets.As long as the timing that the beginning of the counting of counter unit 116 is determined in each frame, also can be set up synchronous timing by detecting for obtaining the unique word signal of frame synchronization after test 2 signal.

In Figure 54, when with fixed cycle received frame, the timing that detected by the antenna switching timing detection signal of antenna switching timing test section 113 to next frame can be made consistent with the timing counted by counter unit 116 couples of count value N.Thus, when counter unit 116 count down to count value N, can be considered as antenna switching timing detection signal being detected.Thus, owing to not needing antenna switching timing detection signal after next frame, therefore, it is possible to improve the efficiency of transmission of payload signal.In addition, the action in Figure 54 is equivalent to the process of the #114 omitted in Figure 56 and transfers to the situation of #104.

On the other hand, in Figure 55, when cannot with fixed cycle received frame, secondarily use count value by counter unit 116, while detected the antenna switching timing detection signal in next frame by antenna switching timing test section 113.That is, according to the count value of counter unit 116, the timing roughly becoming the benchmark that antenna switches is detected, and make antenna switching timing test section 113 carry out action in stipulated time only before and after it.In Figure 55 and Figure 56, such as after counter unit 116 count down to N-4 (#113: "Yes"), make antenna switching timing test section 113 carry out action at the appointed time, detect antenna switching timing detection signal (#114).Thus, even if when comprising error in the cycle of frame, by secondarily using the count value of counter unit 116, the detection accuracy of antenna switching timing detection signal also can be improved.Such as when apply correlation value calculation section 115 as antenna switching timing test section 113, compared with detecting the situation of antenna switching timing detection signal all the time, can reduce because of noise etc. and error detection with the probability of the antenna switching timing detection signal of the computing of correlation.In addition, in #114, when antenna switching timing detection signal can be detected (#114: "Yes"), #104 is transferred to by after the count value of this counter unit 116 reset (#114-1), when antenna switching timing detection signal cannot be detected (#114: "No"), turn back to #101.

(variation)

Figure 57 represents that the antenna of above-mentioned second execution mode switches the Sketch of the another variation of receiving system 110.It is in the antenna switching receiving system 110 of Figure 46, add the regular switch control portion 117 of antenna and form that this antenna switches receiving system 110.The regular switch control portion 117 of antenna is every switched antenna specified time limit in the cycle of more than 2 times of the length of antenna switching timing detection signal.Meanwhile, antenna switching timing detection signal is at least sent out more than 2 times of antenna number repeatedly in a frame.

Figure 58 represents the action switching receiving system 110 at the antenna of this variation above-mentioned antenna switched in receiving system 110 when using the signal of antenna A and antenna B reception and receive this signal.Particularly illustrate the situation of the cycle switched antenna of 2 times of the length by antenna switching timing detection signal.In addition, with flow chart, Figure 59 illustrates that the antenna of this variation switches the action of receiving system 110.In this variation, replace the process of #102, the #103 shown in Figure 48 and perform #115 to #118.

In this variation, comprise antenna switching timing detection signal 1 to 4 from the frame of transmitting system transmission and form.Antenna switching timing detection signal 1 to 4 is made up of different specific signal train.Antenna switch receiving system 110 due to the independently switched antenna of the timing from transmitting system transmission frame, therefore consider various pattern about which antenna to receive which signal by.Such as, the reception timing receipt antenna switching timing detection signal of three patterns shown in Figure 58.

In reception timing example 1, when antenna switching timing detection signal 1 cannot be detected due to the deterioration of reception level or noise etc., continue to attempt reception antenna switching timing and detect with signal 2., owing to switching to antenna B in this reception midway from antenna A, therefore this antenna switching timing detection signal 2 is not also detected.But, in this variation, due to the cycle switched antenna of 2 times of the length of antenna switching timing detection signal, therefore can not at the reception midway switched antenna of next antenna switching timing detection signal 3.Thus, antenna switching timing detection signal 3 can be detected by antenna B.

In addition, in reception timing example 2, first, because the reception midway at antenna switching timing detection signal 1 switches to antenna B from antenna A, therefore this antenna switching timing detection signal 1 is not detected.When then antenna switching timing detection signal 2 cannot be detected because of the deterioration of reception level or noise etc. in the receiving course of antenna switching timing detection signal 2 afterwards, continue to attempt reception antenna switching timing and detect with signal 3., switch to antenna A owing to receiving midway at it from antenna B, therefore this antenna switching timing detection signal 3 is not also detected.But, in this variation, due to the cycle switched antenna of 2 times of the length of antenna switching timing detection signal, therefore can not at the reception midway switched antenna of next antenna switching timing detection signal 4.Thus, antenna switching timing detection signal 4 can be detected by antenna A.

In addition, receive timing example 3 and show the timing that the starts reception antenna switching timing detection signal situation consistent with the timing of switched antenna.In this case, due to reception level deterioration or noise etc. and when cannot detect the detection of antenna switching timing signal 1,2 by antenna B, switch to antenna A, thus antenna switching timing detection signal 3 detected.

Like this, in this variation, by the regular switch control portion 117 of antenna switched antenna (#115) termly, while detected (#116: "Yes") by antenna switching timing test section 113 pairs of antenna switching timing detection signals.Antenna switching timing detection signal is made up of different specific signal train, and therefore antenna switching timing test section 113 can determine which antenna switching timing detection signal detected antenna switching timing detection signal is.Then, the regular switch control portion 117 of antenna, according to the antenna switching timing detection signal detected by antenna switching timing test section 113, counts (#117) until receiving the time till test 1 signal.Such as in Figure 58 reception timing example 1,3, the regular switch control portion of antenna 117 counted the time suitable with antenna switching timing detection signal 4.In addition, if when antenna switching timing detection signal 1 being detected, the time suitable with antenna switching timing detection signal 2 to 4 is counted.As long as some antenna switching timing detection signals detected, therefore undertaken in the process counted by the regular switch control portion 117 of this antenna, the measuring ability of the antenna switching timing of antenna switching timing test section 113 stops (#118).Afterwards, at the end of the counting undertaken by the regular switch control portion 117 of antenna, #104 is transferred to.Due to after this identical with Figure 48, therefore omit the description.

Switch receiving system 110 according to this antenna, the signal of repeatedly reception antenna switching timing detection, coming by specified period switched antenna can by some antenna detection antenna switching timing.Therefore, in the process by some antenna reception antenna switching timing detection signals, even if when cannot detect in the decline because of instantaneous reception level, also can by other antenna detection antenna switching timing detection signal.

(variation)

Figure 60 represents that the antenna of above-mentioned second execution mode switches the Sketch of the another variation of receiving system 110.It is switch in receiving system 110 at the antenna of Figure 46 add antenna switching timing detection startup/closedown (on/off) control part (antenna switching timing detects startup/closing control portion) 118 and form that this antenna switches receiving system 110.Antenna switching timing detects 118 pairs, startup/closing control portion antenna switching timing test section 113 and controls, and makes the detection not carrying out antenna switching timing detection signal after the detection of antenna switching timing detection signal within specified time limit.

Figure 61 represents the action switching receiving system 110 at the antenna of this variation above-mentioned antenna switched in receiving system 110 when using the signal of antenna A and antenna B reception and receive this signal.In addition, with flow chart, Figure 62 illustrates that the antenna of this variation switches the action of receiving system 110.In this variation, between the process of #102 and the #103 shown in Figure 48, perform the process of #119, between the process of #103 and #104, perform the process of #120, after the process of #110 and #111, perform the process of #121, #122.

In Figure 62, when antenna part 111 receives signal (#102), if detect the signal of startup/closing control portion 118 output from antenna switching timing for startup (on) (#119: "Yes"), then transfer to #103.When antenna switching timing test section 113 detects antenna switching timing (#103: "Yes"), the signal exported from antenna switching timing detection startup/closing control portion 118 is set to closedown (off) (#120).Thus, antenna switching timing measuring ability is closed like that as shown in Figure 61.The process of #104 to #110 or #111 is performed afterwards in the same manner as Figure 48, after receiving payload signal by some antennas (#121: "Yes"), the signal exported from antenna switching timing detection startup/closing control portion 118 is set to startup (#122), turns back to #101 afterwards.In addition, if the signal exported from antenna switching timing detection startup/closing control portion 118 is not start (#119: "No"), then #101 is turned back to.

Switch receiving system 110 according to this antenna, be located at the detection not carrying out antenna switching timing after antenna switching timing being detected within the specified time limit of time of reception comprising effective load signal.Thus, for the payload signal or noise etc. that become random signal, can the error detection of suppressing antenna switching timing.Thus, switched antenna in the receiving course of payload signal can be prevented and the mistake (payload cannot be received betwixt owing to needing the switching time of physical property in the switching of antenna) supervened.In addition, when only having some antennas to receive, the switching with unwanted antenna and the reception mistake that produces can be prevented.And, in the transmission and receiving course of payload signal, need fixed antenna fixedly to carry out in advance in the system of the multi-path environment sending and receive at lift-launch equalizer etc., also can suppress the antenna in the transmission of adjoint effective load signal and receiving course to switch the mistake produced.That is, can prevent that multi-path environment in the transmission and receiving course of payload signal from changing suddenly and equalizer normally cannot carry out action to the cancellation function of multipath.In addition, as specified time limit of detection of not carrying out antenna switching timing, also can be set as the reception of the payload signal of present frame to be close to receive next frame antenna switching timing detection signal before during.In this case, the error detection of the antenna switching timing relative to noise after the finishing receiving of the payload signal of present frame can also be suppressed.

In this variation, though when by noise error be detected as antenna switching timing detection signal, also in specified time limit, the measuring ability of antenna switching timing detection signal is stopped.Therefore, also can be configured to: when the unique word signal sent thereafter also being detected after antenna switching timing detection signal being detected, do not carry out the detection of antenna switching timing detection signal in specified time limit.In this case, unique word signal such as continue antenna switching timing detection signal, test 1 signal, test 2 signals after send (with reference to Figure 46).When unique word can also be detected after antenna switching timing detection signal being detected, the antenna switching timing detection signal detected before can being judged as is correct.On the other hand, when unique word signal being detected, the antenna switching timing detection signal detected before can being judged as is wrong, then proceeds the detection of antenna switching timing detection signal.According to this structure, owing to also using the detection of unique word signal in the detection of antenna switching timing detection signal, therefore, it is possible to reduce possibility noise misidentification being made antenna switching timing detection signal.

(variation)

Figure 63 represents that the antenna of above-mentioned second execution mode switches the Sketch of the another variation of receiving system 110.It is switch in receiving system 110 at the antenna of Figure 49 to add counter unit 120 and forming non-detection time that this antenna switches receiving system 110.Non-detection time, counter unit 120 was to not detecting that the time of antenna switching timing detection signal counts.Switch in receiving system 110 at this antenna, when non-detection time, counter unit 120 count down to official hour in the process of being undertaken receiving by some antennas, switch to other antenna.

Figure 64 represents the action switching receiving system 110 at the antenna of this variation above-mentioned antenna switched in receiving system 110 when using the signal of antenna A and antenna B reception and receive this signal.In addition, with flow chart, Figure 65 illustrates that the antenna of this variation switches the action of receiving system 110.In this variation, when in the #112 shown in Figure 51 being "No", perform the process of #125 to #128.

In this variation, when such antenna switching timing detection signal originally being received by antenna A cannot receive in frame 1 and frame 2 as shown in Figure 65 (#112: "No"), carry out following action.That is, if non-detection time, counter unit 120 was not in the process counted the time (#125: "No"), then makes non-detection time counter unit 120 start to count (#126), and turn back to #101.If non-detection time counter unit 120 carrying out counting (#125: "Yes") and non-detection time counter unit 120 count value be not more than setting (#127: "No"), then turn back to #101.If non-detection time, the count value of counter unit 120 was more than setting (#127: "Yes"), then makes counting stop, and be considered as have passed through official hour and switching to other antenna B (#128).At this, official hour refers to if antenna and communication environment normally, are enough to antenna switching timing at least to detect the once above time.Such as, in Figure 64, afore mentioned rules value is set longer than the time needed for the communicating of frame 1 and frame 2.

Receiving system 110 is switched, even if when when specified time limit, Received signal strength also cannot obtain the signal train of antenna switching timing detection signal, switch to other antenna according to this antenna.Therefore, can not by an antenna continuous wait antenna switching timing detection signal.Thus, even if when antenna damages or temporarily in abnormal situation, also reception antenna switching timing detection signal can be carried out by other antenna.

(variation)

Figure 66 represents that the antenna of above-mentioned second execution mode switches the Sketch of the another variation of receiving system 110.It is switch in receiving system 110 at the antenna of Figure 49 to add the second correlation value calculation section 122 and the second correlation value calculation section 123 and form that this antenna switches receiving system 110.In addition, the test signal be made up of the signal train of the particular arrangement different from antenna switching timing detection signal is sent from transmitting system.Second correlation value calculation section (storage part) 122 stores the signal train (reference signal) of the arrangement identical with sent test 1 signal.Second correlation value calculation section 122, by calculating the signal train stored and the correlation of the signal train of test 1 signal received, detects test 1 signal according to this correlation.Similarly, the second correlation value calculation section (storage part) 123 stores the signal train (reference signal) of the arrangement identical with sent test 2 signal.Second correlation value calculation section 123, by calculating the signal train stored and the correlation of the signal train of test 2 signal received, detects test 2 signal according to this correlation.Thus, even if when antenna switching timing detection signal cannot be detected in the deterioration of the reception level due to moment or being mixed into of noise of moment, also can by detecting test 1 signal or test 2 signals receive the payload signal of this frame.

Figure 67 represents the action switching receiving system 110 at the antenna of this variation above-mentioned antenna switched in receiving system 110 when using the signal of antenna A and antenna B reception and receive this signal.In addition, with flow chart, Figure 68 illustrates that the antenna of this variation switches the action of receiving system 110.In this variation, when being "No" in the #112 shown in Figure 51, perform the process of #131 to #132.In addition, when in #112 being "Yes", perform the process of #133.

The calculating of the correlation undertaken by the second correlation value calculation section 122 and the second correlation value calculation section 123 carries out computing concurrently with the calculating of the correlation undertaken by correlation value calculation section 115.Test 1 signal and test 2 signals are sent as seen in figure 67 like that after antenna switching timing detection signal.In addition, when correlation value calculation section 115 detects antenna switching timing (#112: "Yes"), the function stop of the second correlation value calculation section 122,123 is made to detect test 1 signal or test 2 signals (#133) to prevent it.Afterwards, carry out the later process of #104 in the same manner as Figure 51, that is, by switched antenna while the reception level gone out by each antenna detection compares the antenna decided for receiving payload signal.Like this, when correlation value calculation section 115 detects antenna switching timing detection signal, do not carry out the coherent detection of the second correlation value calculation section 122 of use test 1 signal, even if or carry out this detection be also set to invalid.In addition, in this case, terminate to receive payload signal in #110 or #111 after, the second correlation value calculation section 122,123 is again made to carry out the reception of action in order to next frame.

When correlation value calculation section 115 cannot detect antenna switching timing (#112: "No"), when test 1 signal being detected by the second correlation value calculation section 122 (#131: "Yes"), receive payload signal (#110) by current antenna A.Even if when test 1 signal not detected by the second correlation value calculation section 122 (#131: "No"), when test 2 signal being detected by the second correlation value calculation section 123 (#132: "Yes"), also receive payload signal (#110) by current antenna A.In addition, when test 2 signal not detected at the appointed time by the second correlation value calculation section 123 (#132: "No"), #101 is turned back to.Like this, when the second correlation value calculation section 122 detects test 1 signal, do not perform antenna switching action, other process can be carried out within the time that test 2 signal is sent out.Such as, when payload signal is not two-value and needs the adjustment carrying out reception level, the Gain tuning time of automatic growth control can be assigned as.In addition, when the second correlation value calculation section 123 detects test 2 signal, do not perform antenna switching action, and receive payload signal with the value of current automatic growth control.

Switch receiving system 110 according to this antenna, when antenna switching timing detection signal cannot be detected, detect test 1 signal or test 2 signals by the second correlation value calculation section 122 or the second correlation value calculation section 123.Thus, the beginning of payload signal can be detected by double structure or triplen.Thus, even if the level creating noise or moment in the process of reception antenna switching timing detection signal declines, also by testing 1 signal or testing the beginning that 2 signals detect payload signal, the probability of the payload signal of loss 1 frame can be reduced.In addition, the second correlation value calculation section for detecting test signal also can be set up according to the quantity of sent test signal (that is, the number of antenna) further.

In addition, the present invention is not limited to the structure of above-mentioned execution mode, as long as be configured at least select the antenna for receiving payload signal by multiple antenna reception test signal before receiving payload signal.In addition, also can be that appropriately combined for the feature of the respective embodiments described above antenna obtained is switched receiving system.

Above, describe the preferred embodiment of the present invention, but the present invention is not limited to these particular implementation, numerous variations and correction can be carried out in the category of follow-up claims, can say that these change and revise and be also contained in category of the present invention.

Claims (23)

1. antenna switches a receiving system, carries out switching to receive wireless signal to multiple antenna, and the feature that this antenna switches receiving system is,

By while with specified period switched antenna while the quality of the wireless signal received compares, select the antenna for receiving payload,

Above-mentioned antenna switches receiving system to be possessed:

Antenna control part, it controls the switching of antenna;

Unique word configuration part, it presets and stores the bit string of known unique word;

Unique word test section, it while the bit string of the wireless signal received is searched for, detects the bit string identical with the unique word stored by above-mentioned unique word configuration part to switched antenna; And

Signal quality comparing section, the quality by the wireless signal received by each antenna compares by it,

Wherein, when above-mentioned unique word test section detects unique word,

Above-mentioned antenna control part selects the result compared by above-mentioned signal quality comparing section to be judged as the antenna of signal quality the best, the payload after receiving,

The preamble of 2 times that quantity is carried antenna number and unique word are sent out, and each antenna was switched with the cycle of 2 times in the transmission cycle of preamble and unique word.

2. antenna according to claim 1 switches receiving system, it is characterized in that,

From the transmitting system of correspondence, before payload, send with specific order the multiple unique words comprising different bit strings,

Preset by above-mentioned unique word configuration part and store the multiple unique words identical with the multiple unique words sent from above-mentioned transmitting system,

Above-mentioned unique word test section is independently to multiple unique word test sections that above-mentioned multiple unique word detects,

When above-mentioned multiple unique word test section detects the unique word of regulation,

Above-mentioned antenna control part selects the antenna being judged as signal quality the best.

3. antenna according to claim 1 and 2 switches receiving system, it is characterized in that,

Above-mentioned signal quality comparing section has the horizontal comparing section of reception, and the level of the wireless signal received by each antenna compares by the horizontal comparing section of this reception.

4. antenna according to claim 1 and 2 switches receiving system, it is characterized in that,

Above-mentioned signal quality comparing section has unique word error number comparing section, and the error number of the bit string of the wireless signal received by each antenna relative to the bit string of the unique word stored in above-mentioned unique word configuration part compares by this unique word error number comparing section.

5. antenna according to claim 3 switches receiving system, it is characterized in that,

Above-mentioned signal quality comparing section has unique word error number comparing section, and the error number of the bit string of the wireless signal received by each antenna relative to the bit string of the unique word stored in above-mentioned unique word configuration part compares by this unique word error number comparing section.

6. antenna according to claim 4 switches receiving system, it is characterized in that,

From the transmitting system of correspondence, sent before each unique word and be used for setting up bit synchronous preamble,

Above-mentioned unique word error number comparing section is the preamble and unique word error number comparing section that the bit string of the wireless signal received by each antenna are compared relative to the error number of the bit string of preamble and unique word.

7. antenna according to claim 1 and 2 switches receiving system, it is characterized in that,

Also possess the first counter, the first stipulated time that the reception interval of the unique word in this first counter pair and wrap is suitable counts,

When above-mentioned unique word test section detects unique word from the wireless signal received by some antennas, above-mentioned first counter starts counting, and when counting down to above-mentioned first stipulated time, from the signal received by other antenna, detect next unique word.

8. antenna according to claim 1 and 2 switches receiving system, it is characterized in that,

Also possess the second counter, this second counter counts the second stipulated time after switched antenna,

After switched antenna, before above-mentioned second counter counts counted to for the second stipulated time, do not carry out the detection of unique word.

9. antenna according to claim 1 and 2 switches receiving system, it is characterized in that,

Also possess end-of-packet test section, the end of this end-of-packet test section to bag detects,

When above-mentioned end-of-packet test section detects the end of bag, above-mentioned antenna control part automatically reverts to the control of specified period switched antenna, receives next bag.

10. antenna according to claim 1 and 2 switches receiving system, it is characterized in that,

Also possess the 3rd counter, the 3rd counter counts the 3rd stipulated time after specific unique word being detected,

The detection of unique word was not carried out before above-mentioned 3rd counter counts counted to for the 3rd stipulated time.

11. antennas according to claim 1 and 2 switch receiving system, it is characterized in that,

Also possess and receive horizontal detection portion, this reception horizontal detection portion level to the wireless signal received detects,

After above-mentioned reception horizontal detection portion detects the signal level of more than the first threshold of regulation, above-mentioned unique word test section starts the search of unique word.

12. antennas according to claim 1 and 2 switch receiving system, it is characterized in that also possessing:

Select antenna storage part, it is stored in the information of the antenna selected by above-mentioned antenna control part when receiving payload; And

Notification unit, it is according to the information be stored in above-mentioned selection antenna storage part, when the continuous stipulated number of some antennas is selected by above-mentioned antenna control part, informs the user this meaning.

13. antennas according to claim 1 and 2 switch receiving system, it is characterized in that also possessing:

Receive level notice portion, it detects the level of the wireless signal received, and informs user; And

Handoff functionality configuration part, it is for being set by the user the invalidating of antenna switching function.

14. antennas according to claim 1 and 2 switch receiving system, it is characterized in that also possessing:

Receive horizontal detection portion, it detects the level of the wireless signal received; And

Handoff functionality control part, it, when above-mentioned reception horizontal detection portion detects the signal level of more than the Second Threshold of regulation, makes antenna switching function be invalid.

15. antennas according to claim 13 switch receiving system, it is characterized in that,

When making antenna switching function be invalid in above-mentioned handoff functionality configuration part, the transmitting system to correspondence notifies this meaning.

16. antennas according to claim 14 switch receiving system, it is characterized in that,

When above-mentioned handoff functionality control part makes antenna switching function be invalid, the transmitting system to correspondence notifies this meaning.

17. antennas according to claim 13 switch receiving system, it is characterized in that,

When under the state that antenna switching function is invalid, continuous 4th stipulated time cannot detect unique word, above-mentioned handoff functionality configuration part makes antenna switching function be effective.

18. antennas according to claim 14 switch receiving system, it is characterized in that,

When under the state that antenna switching function is invalid, continuous 4th stipulated time cannot detect unique word, above-mentioned handoff functionality control part makes antenna switching function be effective.

19. antennas according to claim 17 switch receiving system, it is characterized in that,

When successfully receiving payload, the transmitting system to correspondence sends the ACK of this meaning.

20. antennas according to claim 18 switch receiving system, it is characterized in that,

When successfully receiving payload, the transmitting system to correspondence sends the ACK of this meaning.

21. antennas according to claim 13 switch receiving system, it is characterized in that,

Under the state that antenna switching function is invalid, antenna switching function is also made to be effective termly.

22. antennas according to claim 14 switch receiving system, it is characterized in that,

Under the state that antenna switching function is invalid, antenna switching function is also made to be effective termly.

23. 1 kinds of wireless communicators, is characterized in that possessing:

Antenna according to claim 1 and 2 switches receiving system; And

Sending part, it sends wireless signal,

Wherein, after receiving payload, when above-mentioned sending part sends wireless signal, above-mentioned antenna control part is used in antenna selected when receiving payload.