1、 ETSI TS 103 366 V1.1.1 (2016-05) Short Range Devices (SRD) using Ultra Wide Band technology (UWB); Time Domain based Low Duty Cycle Measurement for UWB floppy3TECHNICAL SPECIFICATION ETSI ETSI TS 103 366 V1.1.1 (2016-05)2 Reference DTS/ERM-TGUWB-137 Keywords radio, SRD, UWB ETSI 650 Route des Lucio
2、les F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org/standar
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6、t Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The cop
7、yright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2016. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI
8、registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 103 366 V1.1.1 (2016-05)3 Contents Intellectual Property Rights 4g3Foreword . 4g3Modal verbs terminology 4g31 Scope 5g32 R
9、eferences 5g32.1 Normative references . 5g32.2 Informative references 5g33 Definitions, symbols and abbreviations . 6g33.1 Definitions 6g33.2 Symbols 6g33.3 Abbreviations . 7g34 Motivation for the Duty Cycle measurement in the time domain 7g35 Measurement procedure for UWB systems 8g35.1 DUT prepara
10、tion 8g35.2 General test setup . 8g35.2.0 General 8g35.2.1 Conducted emission 9g35.2.2 Radiated emission . 9g35.3 Time domain procedure for DC measurement . 9g3Annex A (informative): Example 12g3A.1 Introduction 12g3A.2 DC measurement in the frequency domain 13g3A.3 DC measurement in the time domain
11、 . 14g3Annex B (normative): Use of the MATLABPost Processing Tool to compute the DC . 18g3Annex C (informative): Recall: Procedure for DC measurement in the frequency domain . 24g3Annex D (informative): Bibliography . 25g3History 26g3ETSI ETSI TS 103 366 V1.1.1 (2016-05)4 Intellectual Property Right
12、s IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential,
13、or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by
14、ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by ETSI Technical Committee
15、 Electromagnetic compatibility and Radio spectrum Matters (ERM). The MATLABcomputations used for the present document are contained in archive ts_103366v010101p0.zip which accompanies the present document. NOTE: MATLABis an example of a suitable product available commercially. This information is gi
16、ven for the convenience of users of the present document and does not constitute an endorsement by ETSI of this product. Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as de
17、scribed in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TS 103 366 V1.1.1 (2016-05)5 1 Scope The present document specifies a time domain procedure for
18、Duty Cycle (DC) measurement. The procedure is applicable to all Ultra Wide Band (UWB) signal types, and it is an alternative to the frequency domain procedure for DC measurement described in ETSI TS 102 883 1. In general, the DC measurement in the time domain will provide more accurate results compa
19、red to the DC measurement in the frequency domain. 2 References 2.1 Normative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, t
20、he latest version of the reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at https:/docbox.etsi.org/Reference/. NOTE: While any hyperlinks included in this clause were valid at the time of
21、 publication, ETSI cannot guarantee their long term validity. The following referenced documents are necessary for the application of the present document. 1 ETSI TS 102 883 (V1.1.1) (08-2012): “Electromagnetic compatibility and Radio spectrum Matters (ERM); Short Range Devices (SRD) using Ultra Wid
22、e Band (UWB); Measurement Techniques“. 2 IEEE Std 802.15.4g4862015: “IEEE Standard for Low-Rate Wireless Personal Area Networks (WPANs)“. IEEE Computer Society Sponsored by the LAN/MAN Standards Committee. 3 ECC/DEC/(06)04: “The harmonised conditions for devices using Ultra-Wideband (UWB) technology
23、 in bands below 10.6 GHz“. 4 ETSI TS 103 060 (V1.1.1) (09-2013): “Electromagnetic compatibility and Radio spectrum Matters (ERM); Short Range Devices (SRD); method for a harmonized definition of Duty Cycle Template (DCT) transmission as a passive mitigation technique used by short range devices and
24、related conformance test methods“. 5 CEPT ECC Report 094: “Technical requirements for UWB LDC devices to ensure the protection of FWA system“, Nicosia, December 2006. 2.2 Informative references References are either specific (identified by date of publication and/or edition number or version number)
25、 or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee the
26、ir long term validity. The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. Not applicable. ETSI ETSI TS 103 366 V1.1.1 (2016-05)6 3 Definitions, symbols and abbreviations 3.1 Definitions F
27、or the purposes of the present document, the following terms definitions apply: burst: A emitted signal whose time duration (Ton) is not related to its bandwidth, as defined in ECC Report 094 5. Duty Cycle: The percentage of the transmitter sum of all burst duration “on“ relative to a given period,
28、as defined in ECC Report 094 5. pulse: A radiated short transient UWB signal whose time duration is nominally the reciprocal of its UWB - 10 dB bandwidth, as defined in ECC Report 094 5. transmission: Sequence of emissions separated by intervals shorter than Tdis“, as defined in ETSI TS 103 060 4. 3
29、.2 Symbols For the purposes of the present document, the following symbols apply: B pulse bandwidth Bursts number of bursts during the acquisition time DC on time (%) Duty Cycle measurement as a percentage of the acquisition time computed considering all the loaded files DC on Tobs(%) Duty Cycle mea
30、surement as a percentage of the whole observation period fcsampling frequency TActiveperiodthe whole active period of the transmission Tdistime interval below which interruptions within a transmission are considered part of Ton(disregard time), as defined in ETSI TS 103 060 4 Time (s) acquisition ti
31、me ToffDefined as “the time interval between two consecutive bursts when the UWB emission is kept idle“ in ECC/DEC/(06)04 3. Defined as “the time duration between two consecutive transmissions“ in ETSI TS 103 060 4. ToffPiTofftime, measured by the Spectrum Analyzer, while sending Packeti(see clause
32、4) Toff (s) sum of the individual Tofftimes during the acquisition time Tobsreference interval of time (observation period), as defined in ETSI TS 103 060 4 TonDefined as “the duration of a burst irrespective of the number of pulses contained“ in ECC/DEC/(06)04 3. Defined as “the duration of a trans
33、mission“ in ETSI TS 103 060 4. Ton(bursts) duration of all the bursts Ton (s) sum of the individual Tontimes during the acquisition time TonPiTontime, measured by the Spectrum Analyzer, while sending Packeti(see clause 4) tPacketisum between the Tontime and the Tofftime while sending Packeti(see cla
34、use 4) Tspanspan time of the oscilloscope Ttrigtrigger time of the oscilloscope ETSI ETSI TS 103 366 V1.1.1 (2016-05)7 3.3 Abbreviations For the purposes of the present document, the following abbreviations apply: BW Band Width CMOS Complementary metal oxide semi-conductor DC Duty CycleDUT Device Un
35、der Test IC Integrated CircuitLDC Low Duty Cycle MMI Man Machine Interface PHR Physical HeadeR PPDU Physical Protocol Data Unit PRF Pulse Repetition Frequency PSDU Physical Service Data Unit SHR Synchronization HeadeRUWB Ultra Wide Band 4 Motivation for the Duty Cycle measurement in the time domain
36、The frequency domain procedure for DC measurement, described in ETSI TS 102 883 1, relies on the use of a Spectrum Analyzer. The procedure allows calculating the DC through the measurements of the Tonand Toffparameters according to a predefined disregard time Tdis(see Figure C.1 in the present docum
37、ent). Nevertheless the accuracy of the Spectrum Analyzer is generally not sufficient in order to measure “small values“ (typically in the order of magnitude of microseconds) of the Tonand Toffparameters. This may also be the case whenever “small values“ of Tdisare considered. As a consequence, in so
38、me cases, the frequency domain procedure for DC measurement could result in overestimating the actual DC. In order to provide a more accurate measurement of the Tonand Toffparameters, a time domain procedure for DC measurement is described in the present document. The procedure considers the use of
39、an Oscilloscope, in order to capture the transmitted signal, and a Post Processing Tool (see Annex B), in order to calculate the refined DC measurement. To better understand the principle of the DC measurement in the time domain, it is possible to consider a generic Tobsobservation period during whi
40、ch some packets, with different durations, can be sent (see Figure 1): Figure 1: Tonand Toffmeasurement by using a Spectrum Analyzer As illustrated in Figure 1, the Spectrum Analyzer is capable to measure the Tonand Toff parameters related to the sending of Packeti. In particular, in Figure 1: Tobs:
41、 is the observation period; TonPi: is the Tontime, measured by the Spectrum Analyzer, while sending Packeti; ETSI ETSI TS 103 366 V1.1.1 (2016-05)8 ToffPi: is the Tofftime, measured by the Spectrum Analyzer, while sending Packeti; tPacketi: is the sum between the Tontime and the Tofftime while sendi
42、ng Packeti; Tdis: is the disregard time. On the other hand, the Spectrum Analyzer is generally not capable to measure Tonand Toff periods occurring between two consecutive bursts related to the sending of Packeti(see Figure 2). In fact, by considering the transmission of a single packet, it may be t
43、he case that the transmission is composed of several bursts, separated by Toffperiods greater than Tdis, that cannot be measured by the Spectrum Analyzer.Indeed, for small values of Tdis, the measurement can only be done in the time domain with an Oscilloscope,which is capable to detect the individu
44、al bursts occurring during the observation time Tobs. Figure 2: Tonand Toffmeasurement by using an Oscilloscope In the Figure 2 above, for example, during the transmission of Packet3, the Oscilloscope will be able to detect the Toffperiod between the two Ton(burst). Since this Toffperiod is greater
45、than Tdis, it can be considered as an additional Toffperiod occurring during the observation time Tobs. With the use of the Spectrum Analyzer, this Toffperiod would have been considered part of Ton. The principle of the time domain procedure for DC measurement is thus to provide a method for the cal
46、culation of the DC based on the fine-grained analysis of the data acquired by the Oscilloscope during the observation time Tobs. 5 Measurement procedure for UWB systems 5.1 DUT preparation No specific DUT preparations are necessary for performing the DC measurement in the time domain. 5.2 General te
47、st setup 5.2.0 General The following tools shall be used to execute the time domain procedure for DC measurement: One 50 Ohm cable; One Oscilloscope with the following minimum requirements: a) Sampling frequency 2B (where B is the pulse bandwidth): this requirement is enough to detect the envelope o
48、f the signal and ensure the correct operation of the measurement procedure. b) Input bandwidth fmax(where fmaxis the highest frequency, i.e. the upper boundary to the operating bandwidth). One Personal Computer with installed a Post Processing Tool. ETSI ETSI TS 103 366 V1.1.1 (2016-05)9 5.2.1 Condu
49、cted emission Figure 3 illustrates the general test setup to execute the time domain procedure for DC measurement in the case of conducted emission. DUT(50 Ohm connector)50 OhmcableOscilloscopePC(Post Processing Tool)Figure 3: General test setup to execute the time domain procedure for DC measurement in the case of conducted emission 5.2.2 Radiated emission Figure 4 illustrates the general test setup to execute the time domain procedure for DC measurement in the case of radiated emission. DUT(integrated antenna)Oscilloscop
