CN104247324A - Method for measuring sensitivity of data packet signal receiver - Google Patents
Method for measuring sensitivity of data packet signal receiver Download PDFInfo
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- CN104247324A CN104247324A CN201380020067.5A CN201380020067A CN104247324A CN 104247324 A CN104247324 A CN 104247324A CN 201380020067 A CN201380020067 A CN 201380020067A CN 104247324 A CN104247324 A CN 104247324A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
- H04L1/203—Details of error rate determination, e.g. BER, FER or WER
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Abstract
Methods for measuring the sensitivity of a data packet signal receiver are provided by varying the power level or modulation or both of a received data packet signal in a predetermined controlled sequence of data packet signals. Specifically, one of methods for measuring a sensitivity level includes: receiving, by a first DPS receiver and a second DPS receiver, a single transmission of a data packet signal including a group of data packets; computing from received first and second portions of a plurality of data packet signals a first cumulative number of correctly received data packet signals for said first DPS receiver; computing from said received first and second portions of a plurality of data packet signals a second cumulative number of correctly received data packet signals for said second DPS receiver; and determining expected PER of said first DPS receiver and said second DPS receiver.
Description
Technical field
Present invention relates in general to the acceptable performance of test electronic, more particularly, relate to the measurement of the sensitivity of multiple data packet signal receiver of multiple tested device (DUT).
Background technology
Electronic receiver is generally the basic element of character of mobile cellular telephone, wireless personal computer (PC) and wireless device.Usually, wireless device can carry out test and guarantees that its performance is qualified before dispatching from the factory.The sensitivity of the receiver of testing apparatus then may be comprised in the partial test of wireless device.The sensitivity of receiver is tested by the Packet Error Ratio (packet error rate, PER) calculating the bag received by receiver under given power stage.Such as, the bag of dose known amounts under predetermined power level is sent to receiver, and calculates the quantity of the bag correctly received by receiver.PER is the quantity of quantity (that is, the quantity of the bag be not correctly received) divided by the bag sent that the quantity of the bag sent deducts the correct bag received, and it represents with percentage usually.Such as, passing score can be set as the PER of 10% or lower.Usually, predetermined power level is selected at the test level place of the assumed sensitivity higher than receiver.Such as, if assumed sensitivity is-75dBm (relative to the decibel of a milliwatt, being therefore absolute power level), then the test level selected can be-72dBm.If for the bag sent under the power of-72dBm received, the PER of receiver is 10% or lower, then receiver is qualified; Otherwise, receiver test failure.If select test level or select test level near the assumed sensitivity of receiver in the assumed sensitivity of receiver, then a small amount of change of the power stage caused due to the connector etc. of pine at receiver end can cause qualified/underproof change of test result and inconsistent.Therefore, usually in enough point selection test level higher than assumed sensitivity, to ensure stable test result.
The true of search receiver or sensibility in practice are to the replacement scheme of above-mentioned traditional test.Such as, PER can be determined for the packet sequence sent under a power stage, then PER be determined for the packet sequence sent under another power stage, continue by this way to determine PER, until find breakover point (such as, catastrophe point) in PER.Usually, sensitivity is specified when PER reaches intended level (such as, 10%) almost equal with catastrophe point.The power stage that PER breakover point can be selected to occur, as the true sensitivity of receiver, based on the true sensitivity found, judges that receiver is qualified or defective.But, due to before finding PER breakover point, may have under the power stage of change, send the iteration of multiple packet sequence, so true receiver sensitivity can increase the testing time.In this case, the cost of test passes receiver can increase along with the increase of testing time.Nonetheless, determine that true receiver sensitivity is still highly.
Such as, by following the tracks of the true receiver sensitivity of tested receiver, the change direction of grade of sensitivity from a receiver to next receiver and rate of change can be learnt.The change of true sensitivity may change relevant to the supplier of receiver parts.If the receiver sensitivity worsened by Timeliness coverage and correction, then can prevent defective device from returning and reform.In addition, modern digital receiver is different from previous analog processor, and it is not little by little desensitization usually.The larger change (such as, from test passes to test failure) of sensitivity can be there is within the received power of 1dB.Therefore, the true sensitivity breakover point as power function may be change very steep in close limit power.Under not knowing true receiver sensitivity place or not knowing that true receiver sensitivity changes nyctitropic situation, when tested receiver starts defective, many receivers will underproof risk be higher at once during production test.
Consider above content, need to carry out improving so that (such as, significantly not increase the testing time) determines the true receiver sensitivity of tested receiver in time.
Summary of the invention
Provide the power stage or modulation that change the data packet signal of reception in predetermined controlled data packet signal sequence or both and measure the method for the sensitivity of multiple data packet signal receiver simultaneously.
Accompanying drawing explanation
By the description carried out below in conjunction with accompanying drawing, the present invention incites somebody to action easy to understand more, and wherein, similar label represents similar parts:
Fig. 1 illustrates curve Figure 100 that display can be used for the example of one group of typical Packet Error Ratio (PER) curve 102 of the sensitivity characteristic of the data packet signal receiver of definition one type;
Fig. 2 illustrates description according to an embodiment of the invention for the flow chart of the example of other method of sensitivity level of measurement data packet signal receiver;
Fig. 3 illustrates description according to another embodiment of the present invention for the flow chart of the example of other method of sensitivity level of measurement data packet signal receiver;
Fig. 4 illustrates the figure of the example of three continuous data bag bursts for showing the transmission according to the embodiment of the present invention;
Fig. 5 illustrates the block diagram being configured to the example of other test macro of sensitivity level for measurement data packet signal receiver according to the embodiment of the present invention;
Fig. 6 illustrates the figure of the example for showing another three the continuous data bag bursts sent according to the embodiment of the present invention;
Fig. 7 illustrates the flow chart described according to the example of other method of sensitivity level for measurement data packet signal receiver of the embodiment of the present invention.
Fig. 8 illustrates the block diagram being configured to the example for measuring other test macro of sensitivity level of each in multiple data packet signal receiver according to the embodiment of the present invention;
Fig. 9 illustrates the flow chart described according to the example for measuring other method of sensitivity level of each in multiple data packet signal receiver of the embodiment of the present invention.
Embodiment
Provide a kind of for measuring other method of sensitivity level of the data packet signal receiver in tested device (DUT).Usually, data packet signal receiver has the sensitivity characteristic of the curve definitions by illustrating the Packet Error Ratio (PER) as the power stage function measured with dBm (absolute power level) or dB (relative power level).Slope of a curve or sensitivity characteristic keep approximately identical from a receiver to next receiver of identical type, and just curve can move along x-axis (dBm axle) to the left or to the right corresponding to the movement of the true sensitivity of specific unit under test.Therefore, the true sensitivity level of particular data packet signal receiver can be described as one of one group of similar curve, and be described as thus one of multiple expection Packet Error Ratio (PER) (such as many curves) relative with multiple data packet signal power level (such as, a curve).
Fig. 1 illustrates curve Figure 100 that display can be used for the example of one group of typical Packet Error Ratio (PER) curve 102 of the sensitivity characteristic of the data packet signal receiver of definition one type.One of curve (such as, curve 104) can describe or define the true sensitivity of specific measured data packet signal receiver.Embodiment herein exemplifies for determine in one group of typical PER curve 102 most matching or mate the specific curves of true sensitivity level of specific measured data packet signal receiver, such as, and the method for curve 104.
Such as, tested receiver can be sent at the data packet signal (, being also only called packet or bag here) of three kinds of different power stages.In this way by test receiver under three kinds of different power stages.Such as, correspondingly receiving element can be sent to by pre-determined number at three continuous print bags of-78dBm ,-75dBm and-72dBm power stage.According to curve Figure 100 of Fig. 1, if the true sensitivity of tested receiver is curve 104, is then nearly allly expected to be will loses at the bag of-78dBm.About 8% is expected to be will loses at the bag of-75dBm transmission, and nearly all bag at-72dBm should be correctly received.Suppose 100 the data-signal bags receiving each power stage in three power stages.In 300 bags that this sends, if receiving element has the true sensitivity described by curve 104, then about 192 packets will be expected to be correct reception.Such as, all 100 bags sent at-72dBm will be expected to be correct reception, in 100 bags that-75dBm sends, have 92 bags will be expected to be correct reception, not wrap and will be expected to be correct reception in 100 bags that-78dBm sends.Therefore, the sum of the correct bag received is by 192 bags in 300 bags for sending.
But hypothesis, receiver sensitivity moves down 1dB (from-75dBm to-74dBm), and is represented by the curve 105 of Fig. 1.Estimate that about 30% bag sent at-75dBm will be lost (according to curve 105), but remaining two ranks will cause the quantity with the bag of loss identical before or reception.Therefore, the receiver with the sensitivity of curve 105 will be expected to be correct about 170 bags received in 300 bags sent.On the contrary, if receiver sensitivity moves 1dB (from-75dBm to-76dBm) to other direction, then the true sensitivity of curve 106 programmable single-chip system acceptor unit.In this case, the receiver with the sensitivity of curve 106 will be expected to be 97 bags be correctly received in 100 bags of-75dBm reception, and also can be correctly received at some bags that-78dBm receives.Therefore, if imitated by the true sensitivity level of curve 106 pairs of receiving elements, then estimate by correctly receive 300 send bags in more than 200 bags.
Being understood that by foregoing can for measured data packet signal receiver determination true sensitivity level from a single of the data packet group of the vicissitudinous power stage of tool sends.As illustrated above, the sum of the correct bag received can be used for true sensitivity or the optimum fit curve of determining particular data packet signal receiver.But, as a rule, do not need to realize the curve for determining true sensitivity level itself, but the sum of the correct bag received (100 such as, in 300 bags) can be used for qualified/defective test result determining particular data packet signal receiver.In addition, the sum of the correct bag received can be followed the tracks of for tested receiver, to accumulate data, thus determine that the sensitivity level of the data packet signal receiver produced else changes direction and/or rate of change.The data of accumulation like this can be used for the reason determining to change, and such as, the grade of sensitivity of deterioration can be relevant to the change of the supplier of receiver parts.
Fig. 2 illustrates the flow chart described according to the example of other method 200 of the sensitivity level for measurement data packet signal receiver of embodiment as herein described.Data packet signal receiver has the sensitivity characteristic defined by one or more expection Packet Error Ratio (PER) (such as, the group of the typical PER curves 102 of Fig. 1) relative with multiple data packet signal power level.Method 200 starts from block 202, and multiple data packet signal is transferred to data packet signal receiver.Process proceeds to block 204, comprises the multiple data packet signals received as the first and second parts, and wherein, described first and second partial response ground have the first and second power stages in the power stage of multiple data packet signal power level.First power stage (such as ,-72dBm) corresponding to Part I is greater than predetermined power level (such as ,-75dBm), and second power stage (such as ,-78dBm) corresponding to Part II is less than predetermined power level.At block 206, calculate the sum of the data packet signal correctly received from described first and second parts.Process proceeds to block 208, it is based on the sum of the correct data packet signal received, according to the one or more expection Packet Error Ratio (PER) relative to multiple data packet signal power level (such as, from many sensitivity curves, group as the typical PER curves 102 of Fig. 1) determine a sensitivity (such as, as a curve or the sensitivity of the curve 104 of Fig. 1).At block 210, follow the tracks of for testing evaluation and sensitivity and provide fixed sensitivity, method 200 terminates.
In alternative embodiment, the process that block 208 carries out is not determine sensitivity or sensitivity curve itself, but the sum of the relatively more correct data packet signal received and predetermined quantity.Sum and the sensitivity of the data packet signal correctly received under the method calculated are closely related.If the sum of the data packet signal of the correct reception calculated is equal to or greater than predetermined quantity, then data packet signal receiver test passes; Otherwise, data packet signal receiver test failure.Still follow the tracks of the sum of the packet of the correct reception of calculating from a tested receiver to next tested receiver, with the change direction of tracking receiver sensitivity and rate of change.At block 210, receiver test is acceptance or rejection, and method 200 terminates.
Such as, the determination in block 208 to a curve or sensitivity can be carried out as follows.In this example, block 208 comprises first selection data structure from multiple data structure (such as, multiple table) built in advance.Can based on the first and second power stages with the first and second partial responses (such as,-72dBm and-78dBm) and the quantity (100 bags such as, sent in each part) of packet that sends in each part of the first and second parts carry out described selection.The sum of the bag correctly received can associate with curve or grade of sensitivity by the selected data structure built in advance.Therefore, the sum of the data packet signal correctly received and the selected data structure built in advance can be compared (such as, described sum can be used as the keyword that execution table is searched in list data structure) to determine curve or grade of sensitivity.Such as, correctly receive for from 300 bags sent the bag ading up to 192, the selected data structure built in advance can return or determine the curve 104 of Fig. 1.Or if correctly receive 170 bags from 300 bags sent, then the selected data structure built in advance can return the curve 105 of Fig. 1.Therefore, the selected data structure built in advance can be used for performing the grade of sensitivity of data packet signal receiver or searching of sensitivity curve based on the sum of the correct bag received.
In alternative embodiment, send the packet of three power stages.Higher than predetermined power level (such as,-75dBm) power stage (such as,-72dBm) send the Part I of packet, in the power stage lower than predetermined power level (such as,-78dBm) send another part, be similar to or equaling predetermined power level place transmission Part III.Select the data structure (such as, list data structure) built in advance of the quantity that may correspond to the bag sent in three power stages of the bag sent and each part in described three parts.Subsequently, the sum of the data packet signal correctly received and the selected data structure built in advance are compared (such as, described sum can be used as the keyword for searching list data structure execution table) to determine curve or grade of sensitivity from the selected data structure built in advance in available curve or grade of sensitivity.
In another embodiment, receive at least two parts of multiple data packet signal, each part comprises the bag with different capacity level.The sum of the correct bag received is calculated from received at least two parts.Then, in one or more expection Packet Error Ratio (PER) relative with multiple data packet signal power level is determined based on the sum of the correct bag received.Such as, sensitivity curve (curve 104 as Fig. 1) is determined from one group of sensitivity curve (group as the typical PER curves 102 of Fig. 1).By first based on the data packet signal power level associated with the quantity of the bag sent in described at least two parts and each part in described at least two parts, one of multiple data structure built in advance is selected to determine.Then, the sum of the data packet signal correctly received and the selected data structure built in advance can be compared determine in described one or more expection Packet Error Ratio (PER) relative with multiple data packet signal power level.
Fig. 3 illustrates the flow chart described according to the example of other method 300 of the sensitivity level for measurement data packet signal receiver of another embodiment as herein described.Data packet signal receiver has the sensitivity characteristic defined by one or more expection Packet Error Ratio (PER) (such as, as the group of the typical PER curves 102 of Fig. 1) relative with multiple data packet signal power level.Method 300 starts from block 302, and multiple data packet signal is transferred to data packet signal receiver.Process proceeds to block 304, and it comprises the multiple data packet signals received as the first and second parts, and described first and second partial response ground have the first and second power stages in the power stage of multiple data packet signal power level.First power stage (such as ,-72dBm) corresponding with Part I is greater than predetermined power level (such as ,-75dBm), and second power stage (such as ,-78dBm) corresponding with Part II is less than predetermined power level.At block 306, the first and second parts corresponding to the data packet signal of multiple reception calculate first and the mat woven of fine bamboo strips two PER.Then process proceeds to block 308, comprise by first and second calculate PER and described one or more expect PER (as, one or more sensitivity curve, as, the group of the typical PER curves 102 of Fig. 1) in corresponding PER compare, to determine best fit for calculated PER or match curve.Such as, for the data packet portions sent with the power stage of-76dBm calculate 30% PER and for the data packet portions sent with the power stage of-74dBm calculate 3% PER the group of the typical PER curves 102 of Fig. 1 can be used to determine or match best the curve 104 of Fig. 1.At block 310, follow the tracks of for testing evaluation and sensitivity and provide fixed sensitivity, method 300 terminates.
In alternative embodiment, send the packet of three power stages.Higher than predetermined power level (such as,-75dBm) power stage (such as,-72dBm) send the Part I of packet, in the power stage lower than predetermined power level (such as,-78dBm) send another part, be similar to or equaling predetermined power level place transmission Part III.Calculate the PER of first, second, and third part.Subsequently, the PER that three calculate is compared to find the sensitivity curve in (such as joining or being fitted to) one group of sensitivity curve, such as, sensitivity curve 104 may be best fit in the group of the typical PER curves 102 of Fig. 1 or coupling.
In another embodiment, send the packet more than three parts, each part has different power stages.Part for each reception calculates PER.The PER of the described calculating more than three subsequently for mate or best fit to the sensitivity curve in one group of sensitivity curve, such as, sensitivity curve 104 may be the optimum Match in the group of the typical PER curves 102 of Fig. 1.
Fig. 4 illustrates the chart 400 of display according to the example of the sequence 401 of three continuous data bag signals 402,404 and 406 of the transmission of embodiment described herein.In this embodiment, each data packet signal has different power stages.Such as, data packet signal 402 has the power stage 408 of about-1dB (relative to reference power level), data packet signal 404 has about+2dB display according to the power stage 410 of the chart 400 of the example of the sequence 401 of three continuous data bag signals 402,404 and 406 of the transmission of embodiment described herein, and data packet signal 406 has the power stage 412 of about-4dB.Sequence 401 can be sent pre-determined number, carry out test data packet signal receiver to provide multiple data packet signals of transmission.Therefore, the data packet signal of equal amount can be sent in each power stage, to provide the Part I of data packet signal at-1dB place, provide the Part II of data packet signal at+2dB place, the Part III of data packet signal is provided at-4dB place.
As shown in the example of fig. 4, dispensing device may need to produce the power stage of bag continuously or the accurate fast change of amplitude aspect, and splitting time shorter between bag.The mode realizing this quick and accurate power stage change in wrapping continuously can be the baseband representation of scaled digital data packet signals, to produce the baseband data packet signals of convergent-divergent.The convertible baseband data packet signals with sending convergent-divergent subsequently.The baseband data packet of each convergent-divergent is converted into have and associates the packet with corresponding power stage with the convergent-divergent of packet.In this way, can produce and be sent in the continuous data bag signal that amplitude or power stage aspect have fast and accurately change.In this case, can not need to use external attenuation device.
Such as, the baseband representation of data packet signal can be the numeral of data packet signal in numeric field.The baseband data packet signals of convergent-divergent can be the digital data packet signal of convergent-divergent.Produce the digital data packet signal of the first convergent-divergent from numeral by numeral being multiplied by zoom factor (such as, zoom factor 0.5).Numeral can be multiplied by different zoom factors (such as, 0.7) to produce the digital data packet signal of the second convergent-divergent, when numeral is multiplied by another different zoom factor (such as, 0.3), the digital data packet signal of the 3rd convergent-divergent can be produced.The digital data packet signal of the first convergent-divergent can produce the data packet signal 402 of Fig. 4 when being changed by digital-to-analogue (DAC) transducer.Second and the 3rd the digital data packet signal of convergent-divergent can produce the data packet signal 404 and 406 of Fig. 4 when converted by the dac accordingly.Data packet signal 402,404 and 406 can be sent as radio frequency (RF) data packet signal in RF territory, to be received by data packet signal receiver.
Baseband data packet signals for generation of the convergent-divergent of the multiple data packet signals tested for receiver can be stored in the memory of dispensing device.Subsequently, the baseband data packet signals of described convergent-divergent can be taken out when needed from memory, and carry out changing and sending.In available embodiment, the baseband data packet signals of the convergent-divergent baseband data packet signals of data packet signal 402,404 and 406 corresponding first, second, and third convergent-divergents (such as, with) is stored in the memory of dispensing device.When needed, the baseband data packet signals of the convergent-divergent stored being taken out, change recurrence of laying equal stress on and give certain pre-determined number, sending string or multiple data packet signal with the data packet signal produced for testing tested receiver.
As described above with reference to Figure 4, can there are three parts, each part has different data packet signal power level.In alternative embodiment, can there are two parts of multiple data packet signal, each part has different data packet signal power level.The sequence 401 of Fig. 4 only can comprise two bags, and each bag is in different power stages, thus produces two parts when repeatedly transmitted.In another embodiment, can exist multiple data packet signal more than the part of three, each part has different data packet signal power level.The sequence 401 of Fig. 4 can comprise the bag more than three, is eachly positioned at different power stages, thus produces the part more than three when repeatedly transmitted.
Fig. 5 illustrates the block diagram of the example of other test macro 500 of sensitivity level of data packet signal (DPS) receiver 502 be configured to for measuring tested device (DUT) 504.DUT504 can be DPS receiver 502, or as shown in Figure 5, DPS receiver 502 can be digit signal receiver (DPS) chip (such as, RF chip), and this chip is the parts be separated with DUT 504.Test macro 500 has dispensing device (such as, Vector Signal Generator (VSG) 506), for sending multiple data packet signal to be received by DPS receiver 502 when testing DPS receiver 502.Transmission medium 508 allows multiple data packet signal to be sent to DPS receiver 502 from the transmitter 510 of VSG 506.Transmission medium 508 can comprise wired or wireless connections.
As shown in Figure 5, VSG 506 comprises memory 514, digital to analog converter (DAC) 512 and transmitter 510.Memory 514 can be used for the baseband data packet signals 516 storing convergent-divergent.Take out the baseband data packet signals 516 of convergent-divergent from memory 514, to make DAC 512 use, thus produce as the previous multiple data packet signals discussed for Fig. 4.Such as, the baseband data packet signals 516 of convergent-divergent can be scaled digital data packet signals, and it is imported into DAC 512 to produce multiple data packet signal, as transmission information 518, sends this transmission information 518 by transmitter 510.The subset of the baseband data packet signals 516 of convergent-divergent or complete set can be stored in memory 514, for the multiple data packet signal of generation.If only have subset to be stored, then the subset of the baseband data packet signals 516 of convergent-divergent is once be converted into the data packet signal for transmitting, and can be sent out pre-determined number, to produce the data packet signal of multiple transmission.
DPS receiver 502 can need or not need to set up link to receive the multiple data packet signals sent.This situation can be DPS receiver 502 is the parts be separated with DUT 504, and DUT504 can provide special driver so that receiver 502 is remained on constant answer mode to DPS receiver 502, the cycle tests of wait-receiving mode bag.
When needing to set up link before receiver 502 prepares to receive, described link can be asynchronous or synchronization link.In Fig. 5, another device unshowned (such as, golden card) can produce the link establishment sequence of the bag arriving DPS receiver 502, to set up link.Once link is established, then golden card is switched to VSG 506 so that VSG 506 produces the cycle tests of bag.
In the situation of a link, DUT 504 confirms the bag received, but as long as VSG 506 does not send while DUT504 sends confirmation, then there will not be problem.Above-mentioned situation is easy to realize, namely by inserting gap or interval between the bag received so that the free confirmation received previously sending bag.Standard or specification are often referred to the minimum interval between regulation bag, and such as, 340 microseconds are defined as the minimum interval between bag by 802.11 standards.Therefore, by inserting the interval of at least 340 milliseconds between transmitted packets, there is link and have an effect in 802.11DUT 504 hypothesis.VSG 506 ignores the confirmation returned for the bag sent simply.
The replacement scheme setting up link for using external device (ED) as golden card for by DUT504 " camouflage " in link.The suitable link establishment sequence of bag can be sent to DUT 504 to be established by DUT 504 disguise as hypothesis link by VSG 506.Such as, VSG 506 can produce the link establishment sequence of bag according to 802.11 standards, to be set up by 802.11DUT 504 disguise as hypothesis link.After transmitting the link-establishing sequence of packets, VSG 506 produces the cycle tests of bag subsequently and sends it to DPS receiver 502.
Two kinds of methods can be applied to distinguish between the link establishment sequence and the cycle tests of bag of bag.When the quantity of the bag received starts to increase (such as, link is established), the first method stops or stops VSG 506, to read the quantity of the correct bag received from DUT 504.Because the mode usually connected guarantees that VSG 506 is for link master, so temporarily stop VSG 506 can not bring problem for async link.Therefore, after the transmission of the link establishment sequence of bag, transmission temporarily can be stopped, to read the quantity of the correct bag received from DUT 504.The sum of the correct bag received after the transmission of the cycle tests of bag can be adjusted thus, to consider the quantity of the bag of the correct reception received from the transmission of the link establishment sequence of bag.
Other method does not consider the quantity of the correct bag received of link establishment transmission from bag due to the quantity of the known bag sent in the link establishment sequence of bag.When setting up link, with the power stage increased and minimum possible bit rate to send the link establishment sequence almost always success of bag.The link establishment bag of dose known amounts can be deducted from the sum of the correct bag received after the cycle tests sending bag, suppose that link establishment Bao Jun is correctly received by DUT 504.
The link that needs are set up is that the situation of synchronization link needs more to pay close attention to when being stopped transmission by VSG 506.But those skilled in the art easily can be identified in link protocol the position that can stop when not losing link and restart transmitting.By using the modern VSG 506 be connected with inner or outer triggering signal, temporarily stop transmission, then re-establishing connection should be relatively simple task.
Can take to send the substitute mode of bag with when significantly not increasing the testing time in different power stages, reach the effect of the sum of the bag of the true sensitivity level (such as, based on the PER PER of calculating being matched to expection) determining data packet signal receiver or the correct reception relevant to true sensitivity level calculated equally.Substitute mode sends test pack string (thus not changing the bag of transmission) in identical power stage, but modulates by different way.Not there is the mode different from the power stage of the bag of other parts to send each several part of bag with the bag of each part, but send and receive the bag of a part by the modulation of the bag to be different from other parts, each part is distinguished with other parts.However, the use hypothesis of this mode has the system or receiver of supporting multiple bit rate, such as, and IEEE 802.11 system.
Please note: in this application, term " bit rate " can replace " modulation " to use, but the change of bit rate or modulation pursues is the change of sensitivity or SNR.Although reduce bit rate can cause obtaining better sensitivity, better sensitivity must not obtain by reducing bit rate.Bit rate can be reduced to send more power or to take less bandwidth.Therefore, because the change of modulation causes different sensitivity, term modulation may be better than bit rate.
Fig. 6 shows, and such as, the chart 600 of the example of the sequence 601 of 610,620 and 630 is wrapped in display according to an embodiment of the invention another three of sending continuously.In this case, contrary with Fig. 4, three continuous print bags 610,620 and 630 all have substantially equal power stage, but all send with different bit rates and receive.Such as, although bag 610,620 and 630 all has the byte of equal number, bag 610 sends at time slot 640, and time slot 640 is different from the transmission time slot 650 for wrapping 620, and transmission time slot 650 is different from the transmission time slot 660 for wrapping 630.Such as, time slot 640 can be associated with 54Mbps, and time slot 650 can be associated with 48Mbps, and time slot 660 can be associated with 36Mbps.Described three each continuously in bag 610,620 and 630 are in identical power stage, but are sent out with different bit rates and receive.
Typically, while keeping power stage identical for the bag sent, each bit rate of sensitivity (such as, the PER of 10%) corresponding to DPS receiver 502 can be found.Such as, receiver 502 has the sensitivity of-75dBm for the bag sent with 54Mbps received, and the bag sent with 48Mbps received is had to the sensitivity of-78dBm, the bag sent with 36Mbps received is had to the sensitivity of-80dBm.If the power stage of the bag sent is set to-78dBm, then estimate to receive great majority or all bags sent with 36Mbps, some bag sent with 48Mbps, the considerably less bag sent with 54Mbps.Therefore, such as, the DPS receiver 502 with the sensitivity of-78dBm of the bag of received power level-78dBm can be expected to be and receive all 100 bags, 90 bags in 100 bags sent with 48Mbps that send with 36Mbps, and does not receive any bag in wrapping with 100 of 54Mbps transmission.In 300 bags sent, if receiver 502 has the sensitivity of-78dBm, then estimate correctly to receive 190 bags.If the sensitivity of receiver 502 poor (such as ,-75dBm), then estimate by correctly receive 300 send bags in be less than 190 bags.If the sensitivity of receiver 502 better (such as ,-80dBm), then estimate by correctly receive in 300 bags sent more than 190 bags.In the multiple DPS receiver 502 of test, the sum of the correct bag received the bag of the transmission from some predetermined quantity (sending with the part of different data bit-rates transmission) calculated can be collected for each DPS receiver 502.The data of collecting can be used for change direction and/or the rate of change of the sensitivity of the DPS receiver 502 indicating test.This end product is very similar to the end product realized by the method for Fig. 2.
Be appreciated that the single that can receive one group of test pack sends from foregoing, but when the test pack sent with same power level bit rate change is received by DPS receiver 502, the sum of the packet correctly received and predetermined quantity can be compared.As shown in above-mentioned example, the sum of the correct bag received can be closely related with the true sensitivity of receiver 502.Therefore, the sum by following the tracks of the correct bag received comes change direction and the rate of change of the sensitivity of the DPS receiver 502 of tracking and testing.
Fig. 7 illustrates the flow chart described according to the example of other method 700 of sensitivity level for measuring DPS receiver 502 of embodiment as above.At block 702, method 700 starts by multiple data packet signal is sent to DPS receiver 502.Each data packet signal has substantially equal power stage, but all sends with the bit rate of one of at least two different bit rates or part.The data packet signal of multiple transmission is received at block 704, DPS receiver 502.At least two parts of multiple data packet signal are received, and each part has bag, and described bag has substantially equal power stage.The bag of the part received sends with identical bit, but this bit rate is different from the transmission bit rate of the bag of another part.At block 706, calculate the sum of the correct bag received from the multiple data packet signals received by DPS receiver 502.At block 708, the sum of the bag correctly received and predetermined quantity are compared.If the sum of the correct bag received is equal to or greater than predetermined quantity, then DPS receiver 502 is by sensitivity test, otherwise its sensitivity test is defective.At block 710, make the sum of test result (qualified/defective) and the correct bag received for tester or user Ke get, method 700 terminates.
In alternative embodiment, at block 708, the sum of the correct data packet signal received is used to the sensitivity determining data packet signal receiver.Data packet signal receiver can make test passes or defective based on the sensitivity determined.At block 710, the sensitivity of data packet signal receiver and/or test result are returned user or tester.
Because receiver maybe can not receive the bag of different bit rates, the method 200 of Fig. 2 can be more flexible than the method 700 of Fig. 7.But, when test receiver can receive with different data bit-rates, the enforcement advantage that can DUT device used to replace supplying method 700 in VSG.Communicator easily can send bag with different data transfer rates usually, keeps identical power stage simultaneously.Such as, so-called " golden unit (golden unit) " can be used to replace VSG to produce bag.Golden unit can not change power output based on each bag usually, but usually easily can change modulation (such as, data bit-rate) based on each bag.Therefore, when testing by golden unit, the mode changing bit rate while keeping power stage identical for the bag sent is very useful.Golden unit is gained the name based on usually using the device of desirable features, in this case for sending and the source of generation, is named as thus " golden unit ".
It is to be understood that the method for also Fig. 2 and Fig. 7 capable of being combined.When doing like this, the power of the bag that each sends can be changed to realize the interval expected.Such as, in the foregoing description of Fig. 6, if be received at-81dBm in the part of the bag of-80dBm reception, then the power by deducting 1dB from 36Mbps signal realizes.
Two kinds of Combination of Methods also can be provided for the ability meeting the needs increasing dynamic testing range.Such as, suppose the noise in the signal needing 40dB SNR to guarantee to send, will not measurement be affected.If VSG can realize the dynamic range of 60dB, then power can change to 60dB (scope of 20dB) from 40dB, but for the signal of such as IEEE 802.1a/g, for this signal averaging, peak value gets 10dB.Therefore, for fixing RF gain, VSG only can change the power in the dynamic range of 10dB effectively.In order to increase dynamic range further in testing, system can very expensive (such as, for power and cost all very expensive).By by two of Fig. 2 and Fig. 7 kinds of Combination of Methods, by increasing modulation or data bit-rate instead of reducing power, move up test in sensitivity (obtaining the dynamic range increased) further, and need not reduce signal to noise ratio (SNR).
In addition, the combination of method can be used for the gain step of testing RF chips inside.Such as, if the low noise amplifier in receiver front end (LNA) has two kinds of different gains, then measurement sensitivity can be located in both high-gain and low gain.This uses the identical signal in VSG to realize by using the bag string of the such as 20dB scope that covers.If only carry out convergent-divergent in power, then may there is problem (according to VSG) in SNR, but by hybrid modulation and power, in the test with limited power change, easily can reach the dynamic range of 20dB.Naturally, test level (bit rate of part) will nondestructively will receive most bag level along with high-gain LNA (optimum sensitivity) and move, and low gain will only receive some levels.This remains acceptable, as long as correspondingly adjustment test restriction.The attendant advantages using single bag string to perform this test is, if execution slightly fast when needing the longer time to adjust VSG system gain, in this case, only needs an adjustment gain.
Fig. 8 illustrates the block diagram of the example of other test macro 800 of sensitivity level of the multiple DPS receivers (502a, 502b and 502c) be configured to according to another embodiment of the present invention for measuring multiple DUT (504a, 504b and 504c).Test macro 800 be configured to with composition graphs 5 above discuss similar.But dispensing device 510 current being used to sends multiple data packet signal to power splitter 801 to be received by multiple DPS receiver 502 when testing multiple DPS receiver 502 at the same time.Such as, described multiple data packet signal can the form that sends of single send, and it comprises multiple packets with different capacity level, bit rate and/or modulation.As long as those skilled in the art will appreciate that the known power stage being sent to the signal of DPS receiver 502, then can adopt any the signal received from VSG 506 can be dispensed to multiple DPS receiver 502 parts or component combination substitute power splitter 801.In a preferred embodiment, the transmission that DPS receiver 502 receives has identical power stage from the signal of power splitter 801.But in another embodiment, each signal received of multiple DPS receiver 502 but has the power stage of difference (but known).Transmission medium 508 allows multiple data packet signal to be sent to power splitter 801 from the transmitter 510 of VSG 506.Similarly, transmission medium 803 allows multiple data packet signal to be sent to DPS receiver 502 from power splitter 801.Described transmission medium 508 and 803 can relate to wired or wireless connections, but may not be identical.Such as, transmission medium 508 and 803a may be all wired connection, and transmission medium 803b and 803c may be then wireless connections.In another embodiment of the invention, the transmitter 510 of VSG 506 directly may send multiple data packet signal to each of multiple DPS receiver 502.Change known by the through-put power of transmission medium 508 and 803 and power splitter 801 or be easy to determine.Therefore, the power stage of each signal transmission received of multiple DPS receiver 502 is known.A signal comprising multiple signal bags with predetermined power level can be produced by VSG 506, and (or simultaneously basic) is received by DPS receiver 802 simultaneously.According to the description of above-described embodiment, can be used for by the signal characteristic (such as, power stage, bit rate and/or modulation) of each signal transmission received of multiple DPS receiver the grade of sensitivity of each simultaneously determining multiple DPS receiver.Adopt the while of carrying out in this way or parallel testing, also there is another one advantage, the testing time of test needed for multiple DPS receiver can be reduced.
Fig. 9 illustrates the flow chart described according to the example of other method 900 of sensitivity level for measuring multiple data packet signal receiver simultaneously of embodiment as above.Multiple data packet signal receiver (such as, DPS receiver 502a, 502b and 502c shown in Fig. 8) in each receiver all have by expecting the sensitivity characteristic that Packet Error Ratio (PER) defines relative to one or more (such as, the groups of typical PER curves as shown in Figure 1) of multiple data packet signal power level.At starting block 902, method 900 is by being sent to each data packet signal receiver by multiple data packet signal and starting simultaneously.Process proceeds to block 904, it comprises the multiple data packet signals of each reception as the first and second parts of DPS receiver, wherein, described first and second parts have the first and second power stages in the power stage of multiple data packet signal power level accordingly.First power stage (such as ,-72dBm) corresponding with Part I is greater than predetermined power level (such as, 75dBm), and second power stage (such as ,-78dBm) corresponding with Part II is less than predetermined power level.At block 906, calculate the sum of the data packet signal that each DPS receiver correctly receives from described first and second parts.Process proceeds to block 908, it is based on the sum of the correct data packet signal received, according to relative to multiple data packet signal power level one or more (such as, from many sensitivity curves, the group of typical PER curves 102 as shown in Figure 1) expect that Packet Error Ratio (PER) determines the sensitivity (such as, as a curve or the sensitivity of the curve 104 of Fig. 1) of each DPS receiver.Again, in a preferred embodiment of the invention, the described of each DPS receiver determines substantially side by side executed in parallel.Or, describedly determine also can to perform sequentially (such as, to increase test DPS receiver required time for cost, reduce to perform and determines required resource).At block 910, for the fixed sensitivity providing each DPS receiver is followed the tracks of in testing evaluation and sensitivity, method 900 terminates.
In alternative embodiment, process proceeds to block 908, replaces by the sum and predetermined quantity comparing the data packet signal of the correct reception of calculating sensitivity or the sensitivity curve itself of determining each DPS receiver.Sum and the sensitivity of the data packet signal of the correct reception of the calculating of the method are closely related.If the sum of the data packet signal of the correct reception calculated is more than or equal to predetermined quantity, then data packet signal receiver passes through sensitivity test; Otherwise its sensitivity test is defective.Still follow the tracks of the sum of the packet of the correct reception of calculating from a tested receiver to next tested receiver, with the change direction of tracking receiver sensitivity and rate of change.Similarly, by the sum of the data packet signal of the correct reception of the calculating between relatively simultaneously tested DPS receiver (such as, DPS receiver 502a and 852b shown in Fig. 8), change direction and the rate of change of receiver sensitivity is determined.At block 910, receiver test is acceptance or rejection, and method 900 terminates.
By being to be understood that above, test macro 800 as shown in Figure 8 can use together with above-disclosed each embodiment, thus by using, there is different capacity level, multiple data packet signals that the single of bit rate and/or modulation sends substantially side by side can test multiple DPS receiver.The signal that described single sends is received by each of multiple tested DPS receiver 502.The packet sum that each DPS receiver (such as, 502a, 502b and 502c) correctly receives is determined and grade of sensitivity for determining each DPS receiver respectively.Due to multiple DPS receiver once can be tested, therefore significantly the testing time can be reduced.Or, multiple data packet signals of first time transmission can be sent to first DPS receiver (the DPS receiver 502a such as, shown in Fig. 8) or first group of DPS receiver (DPS receiver 502a and 502b such as, shown in Fig. 8).Subsequently, multiple data packet signals of second time transmission can be sent to second DPS receiver (the DPS receiver 502c such as, shown in Fig. 8) or second group of DPS receiver.When determining the grade of sensitivity of first or first group DPS receiver, or when arranging (such as, being arranged by test man) or one group of new receiver, described secondary signal can be sent.This permission carries out subcontinuous test to DPS, if the setup times of device is at every turn to test required time similar, then can reduce test required time further.
In described many advantages, embodiment described herein provides: when significantly not increasing the testing time, determine the true sensitivity level of measured data packet signal receiver, or calculates the sum of bag of the correct reception relevant to true sensitivity level.In addition, can accumulate and follow the tracks of the true sensitivity data (sum of the bag of the correct reception of best fit sensitivity curve or calculating) for the data packet signal receiver tested, to analyze subsequently.Such as, by noting trend or the direction of the sensitivity followed the tracks of, such as, the sensitivity running down or improve, can find the reason of this trend, and such as, described trend can be relevant to the change of the parts suppliers of receiver.
Provide the foregoing detailed description to invention herein and example, be only used to the object of example and description, instead of as restriction.Such as, the operation described can be realized according to any applicable mode.Can according to any suitable order of the operation described and result that still provides to realize described method step.Therefore, the present invention can be predicted and contain any and all modifications, modification or equivalent within the spirit and scope falling into above-mentioned disclosed and claimed general principle herein.
Claims (22)
1. one kind for measuring other method of the sensitivity level of each of the first and second data packet signals (DPS) receiver, each of described first and second data packet signal receiver has the sensitivity characteristic by defining relative to the expection Packet Error Ratio (PER) of data packet signal power level, and described method comprises:
Receive by a described DPS receiver and the 2nd DPS receiver the single comprising the data packet signal of data packet group to send, Part I in wherein said multiple data packet signal and Part II have the first data packet signal power level and the second data packet signal power level accordingly, and described first data packet signal power level and the second data packet signal power level are greater than predetermined power level respectively and are less than predetermined power level;
According to Part I and the Part II of the described reception of multiple data packet signal, calculated the first sum of the data packet signal that a described DPS receiver correctly receives at least partly by a described DPS receiver;
According to Part I and the Part II of the described reception of multiple data packet signal, calculated the second sum of the data packet signal that described 2nd DPS receiver correctly receives at least partly by described 2nd DPS receiver; And
After all described data packet group receiving described first and second sums comprising the correct packet received, described first sum based on the correct data packet signal received determines the first single expection PER for a described DPS receiver, and determines the second single expection PER based on described second sum of the correct data packet signal received for described 2nd DPS receiver.
2. method according to claim 1, wherein, describedly determine to comprise:
Select in multiple data structure built in advance; And
One of described selection in each and multiple data structure built in advance of described first and second sums of the data packet signal correctly received is compared, to determine relative to each of the described first and second singles expection PER of described data packet signal power level.
3. method according to claim 1, also comprises:
Receive the Part III in described multiple data packet signal, described Part III has three data packet signal power level substantially equal with described predetermined power level; And
Each of described first and second sums of the correct data packet signal received is calculated according to the Part I received, Part II and the Part III in described multiple data packet signal.
4. method according to claim 3, wherein, describedly determine to comprise:
Select in multiple data structure built in advance; And
One of described selection in each and multiple data structure built in advance of described first and second sums of the data packet signal correctly received is compared, to determine relative to each of the described first and second singles expection PER of described data packet signal power level.
5. method according to claim 1, wherein, for a described DPS receiver and described 2nd DPS receiver, described reception, to calculate and one or more in determining carry out substantially simultaneously.
6. one kind for measuring other method of the sensitivity level of each of the first and second data packet signals (DPS) receiver, each of described first and second data packet signal receiver has the sensitivity characteristic by defining relative to the expection Packet Error Ratio (PER) of data packet signal power level, and described method comprises:
Receive by a described DPS receiver and the 2nd DPS receiver the single comprising the data packet signal of data packet group to send, in wherein said data packet group, each of at least two parts has different data packet signal power level;
According at least two parts received described in described data packet group, calculated the first sum of the packet that a described DPS receiver correctly receives at least partly by a described DPS receiver;
According at least two parts received described in described data packet group, calculated the second sum of the packet that described 2nd DPS receiver correctly receives at least partly by described 2nd DPS receiver; And
After all described data packet group receiving described first and second sums comprising the correct packet received, described first sum based on the correct packet received determines the first single expection PER of a described DPS receiver, and determines the second single expection PER of described 2nd DPS receiver based on described second sum of the correct packet received.
7. method according to claim 6, wherein, describedly determine to comprise:
Select in multiple data structure built in advance; And
One of described selection in each and multiple data structure built in advance of described first and second sums of the packet correctly received is compared, to determine relative to each of the described first and second singles expection PER of described data packet signal power level.
8. method according to claim 6, also comprises: send described data packet signal.
9. method according to claim 8, wherein, carries out convergent-divergent to the baseband representation of data packet signal, to produce the baseband data packet of convergent-divergent, and changes and sends the baseband data packet of described convergent-divergent, as at least two parts of the transmission of described data packet group.
10. method according to claim 9, wherein, the described baseband representation of data packet signal is numeral, and the baseband data packet of described convergent-divergent is the digital data packet of convergent-divergent, and the digital data packet of described convergent-divergent is changed by digital to analog converter (DAC).
11. methods according to claim 9, wherein, store the baseband data packet of convergent-divergent in memory, to take out subsequently to carry out described conversion and transmission.
12. methods according to claim 11, wherein, the baseband data packet of the convergent-divergent stored is converted recurrence of laying equal stress on and send pre-determined number, to produce at least two parts of the transmission of described data packet group.
13. methods according to claim 6, wherein, for a described DPS receiver and described 2nd DPS receiver, described reception, to calculate and one or more in determining carry out substantially simultaneously.
14. 1 kinds for measuring other method of the sensitivity level of each of the first and second data packet signals (DPS) receiver, each of described first and second data packet signal receiver has the sensitivity characteristic passing through to define relative to the expection Packet Error Ratio (PER) of data packet signal power level in the modulation of related bits rate, and described method comprises:
Receive by a described DPS receiver and the 2nd DPS receiver the single comprising the data packet signal of data packet group to send, the first and second parts in wherein said data packet group have substantially equal packet power stage and have the first bit-rate modulation and the second bit-rate modulation accordingly, and described first bit-rate modulation and the second bit-rate modulation are greater than the modulation of predetermined bit rate respectively and are less than the modulation of predetermined bit rate;
According to Part I and the Part II of the described reception of described data packet group, calculated the first sum of the packet that a described DPS receiver correctly receives at least partly by a described DPS receiver;
According to Part I and the Part II of the described reception of described data packet group, calculated the second sum of the packet that described 2nd DPS receiver correctly receives at least partly by described 2nd DPS receiver; And
After all described data packet group receiving described first and second sums comprising the correct packet received, described first sum based on the correct packet received determines the first single expection PER of a described DPS receiver, and determines the second single expection PER of described 2nd DPS receiver based on described second sum of the correct packet received.
15. methods according to claim 14, also comprise:
Receive the Part III of described data packet group, described Part III has the packet that power stage equals the power stage of the packet in Part I and Part II substantially, and described Part III has modulates the 3rd substantially equal bit-rate modulation with described predetermined bit rate; And
Each of described first and second sums of the packet of described correct reception is calculated according to the Part I received of described data packet group, Part II and Part III.
16. methods according to claim 14, wherein, for a described DPS receiver and described 2nd DPS receiver, described reception, to calculate and one or more in determining carry out substantially simultaneously.
17. 1 kinds for measuring other method of the sensitivity level of each of the first and second data packet signals (DPS) receiver, each of described first and second data packet signal receiver has the sensitivity characteristic passing through to define relative to the expection Packet Error Ratio (PER) of data packet signal power level in the modulation of related bits rate, and described method comprises:
Receive by a described DPS receiver and the 2nd DPS receiver the single comprising the data packet signal of data packet group to send, at least two parts of wherein said data packet group have substantially equal power stage, and each of described at least two parts has different bit-rate modulation;
According at least two parts of the described reception of described data packet group, calculated the first sum of the packet that a described DPS receiver correctly receives at least partly by a described DPS receiver;
According at least two parts of the described reception of described data packet group, calculated the second sum of the packet that described 2nd DPS receiver correctly receives at least partly by described 2nd DPS receiver; And
After all described signal package receiving described first and second sums comprising the correct packet received, described first sum based on the correct packet received determines the first single expection PER of a described DPS receiver, and determines the second single expection PER of described 2nd DPS receiver based on described second sum of the correct packet received.
18. methods according to claim 17, wherein, at least one part in described at least two parts has the bit-rate modulation lower than the modulation of predetermined bit rate, and at least one part in described at least two parts has the bit-rate modulation higher than the modulation of predetermined bit rate.
19. methods according to claim 17, wherein, for a described DPS receiver and described 2nd DPS receiver, described reception, to calculate and one or more in determining carry out substantially simultaneously.
20. 1 kinds for measuring other method of the sensitivity level of each of the first and second data packet signals (DPS) receiver, each of described first and second data packet signal receiver has the sensitivity characteristic passing through to define relative to the expection Packet Error Ratio (PER) of data packet signal power level in the modulation of related bits rate, and described method comprises:
Receive by a described DPS receiver and the 2nd DPS receiver the single comprising the data packet signal of data packet group to send, at least two parts in wherein said data packet group have substantially equal power stage and bit-rate modulation, and at least two other part in described data packet group has different power stages and bit-rate modulation;
According at least two parts of the described reception of described data packet group, calculated the first sum of the packet that a described DPS receiver correctly receives at least partly by a described DPS receiver;
According at least two parts of the described reception of described data packet group, calculated the second sum of the packet that described 2nd DPS receiver correctly receives at least partly by described 2nd DPS receiver; And
After all described data packet group receiving described first and second sums comprising the correct packet received, described first sum based on the correct packet received determines the first single expection PER of a described DPS receiver, and determines the second single expection PER of described 2nd DPS receiver based on described second sum of the correct packet received.
21. methods according to claim 20, wherein, at least one part in described at least two parts has lower than the bit-rate modulation of predetermined bit rate modulation and the power stage lower than predetermined power level, and at least one part in described at least two parts has higher than the bit-rate modulation of predetermined bit rate modulation and the power stage higher than predetermined power level.
22. methods according to claim 20, wherein, for a described DPS receiver and described 2nd DPS receiver, described reception, to calculate and one or more in determining carry out substantially simultaneously.
Applications Claiming Priority (3)
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| US13/452,169 | 2012-04-20 | ||
| US13/452,169 US8913517B2 (en) | 2005-06-01 | 2012-04-20 | Method for measuring sensitivity of data packet signal receiver |
| PCT/US2013/029257 WO2013158229A1 (en) | 2012-04-20 | 2013-03-06 | Method for measuring sensitivity of data packet signal receiver |
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| CN104247324A true CN104247324A (en) | 2014-12-24 |
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| CN201380020067.5A Pending CN104247324A (en) | 2012-04-20 | 2013-03-06 | Method for measuring sensitivity of data packet signal receiver |
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| JP (1) | JP2015520547A (en) |
| KR (1) | KR20150002610A (en) |
| CN (1) | CN104247324A (en) |
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| CN107787563A (en) * | 2015-07-08 | 2018-03-09 | 莱特普茵特公司 | Method for testing radio frequency (RF) data packet signal transceiver Packet Error Ratio |
| CN109474447A (en) * | 2017-09-07 | 2019-03-15 | 北京京东尚科信息技术有限公司 | Alarm method and device for real-time monitoring system |
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| JP5287476B2 (en) * | 2009-04-28 | 2013-09-11 | パナソニック株式会社 | Radio terminal reception sensitivity measurement system |
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- 2013-03-06 JP JP2015506988A patent/JP2015520547A/en active Pending
- 2013-03-06 WO PCT/US2013/029257 patent/WO2013158229A1/en active Application Filing
- 2013-03-06 KR KR1020147026034A patent/KR20150002610A/en not_active Application Discontinuation
- 2013-03-06 CN CN201380020067.5A patent/CN104247324A/en active Pending
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| US5691988A (en) * | 1994-11-17 | 1997-11-25 | Hewlett-Packard Company | Method for measuring the sensitivities and interference wave properties fo receivers |
| JP2005117303A (en) * | 2003-10-07 | 2005-04-28 | Nec Corp | Radio lan apparatus and method for controlling transmitting power |
| CN101180834A (en) * | 2005-06-01 | 2008-05-14 | 莱特普茵特公司 | Method for measuring sensitivity of data packet signal receiver |
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Also Published As
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| WO2013158229A1 (en) | 2013-10-24 |
| TW201345166A (en) | 2013-11-01 |
| KR20150002610A (en) | 2015-01-07 |
| JP2015520547A (en) | 2015-07-16 |
| TWI617140B (en) | 2018-03-01 |
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