1、 ETSI TS 1Digital cellular telecommGSM(3GPP TS 45.0TECHNICAL SPECIFICATION145 004 V13.4.0 (2017mmunications system (Phase M/EDGE Modulation .004 version 13.4.0 Release 13GLOBAL SYSTEMOBILE COMMUN17-01) e 2+) (GSM); 13) TEM FOR ICATIONSRETSI ETSI TS 145 004 V13.4.0 (2017-01)13GPP TS 45.004 version 13
2、.4.0 Release 13Reference RTS/TSGR-0645004vd40 Keywords GSM ETSI 650 Route des Lucioles 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 Impor
3、tant notice The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written
4、authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. Users of the present document sh
5、ould be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at https:/portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you find errors in the present document, please send your comment to one of the f
6、ollowing services: https:/portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright 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 P
7、DF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2017. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI
8、 registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI 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 145 004 V13.4.0 (2017-01)23GPP TS 45.00
9、4 version 13.4.0 Release 13Intellectual Property Rights 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
10、314: “Intellectual Property Rights (IPRs); Essential, 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 investiga
11、tion, including IPR searches, has been carried out by 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 Specificat
12、ion (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
13、The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. 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
14、 described 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 145 004 V13.4.0 (2017-01)33GPP TS 45.004 version 13.4.0 Release 13Contents Intellectual Pr
15、operty Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g31.1 References 5g31.2 Abbreviations . 5g32 Modulation format for GMSK . 5g32.1 Modulating symbol rate 5g32.2 Start and stop of the burst . 6g32.3 Differential encoding 6g32.4 Filtering 6g32.5 Output phase . 7g32.6 Mod
16、ulation . 7g32.7 Overlaid CDMA . 8g33 Modulation format for 8PSK 8g33.1 Modulating symbol rate 8g33.2 Symbol mapping 8g33.3 Start and stop of the burst . 9g33.4 Symbol rotation 10g33.5 Pulse shaping 10g33.6 Modulation . 10g34 Modulation format for 16QAM and 32QAM at the normal symbol rate . 11g34.1
17、Modulating symbol rate 11g34.2 Symbol mapping 11g34.3 Start and stop of the burst . 12g34.4 Symbol rotation 13g34.5 Pulse shaping 13g34.6 Modulation . 13g35 Modulation format for QPSK, 16QAM and 32QAM at the higher symbol rate 13g35.1 Modulating symbol rate 13g35.2 Symbol mapping 14g35.3 Start and s
18、top of the burst . 14g35.4 Symbol rotation 14g35.5 Pulse shaping 14g35.6 Modulation . 15g36 Modulation format for AQPSK 15g36.1 Modulating symbol rate 15g36.2 Symbol mapping 15g36.3 Start and stop of the burst . 16g36.4 Symbol rotation 17g36.5 Pulse shaping 17g36.6 Modulation . 17g3Annex A (normativ
19、e): Tx filter coefficients for the spectrally wide pulse shape 18g3Annex B (informative): Change history . 19g3History 20g3ETSI ETSI TS 145 004 V13.4.0 (2017-01)43GPP TS 45.004 version 13.4.0 Release 13Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Project (
20、3GPP). The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version
21、number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
22、 updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. ETSI ETSI TS 145 004 V13.4.0 (2017-01)53GPP TS 45.004 version 13.4.0 Release 131 Scope The modulator receives the bits from the encryption unit, see 3GPP TS 45.001, and produces an RF
23、signal. The filtering of the Radio Frequency (RF) signal necessary to obtain the spectral purity is not defined, neither are the tolerances associated with the theoretical filter requirements specified. These are contained in 3GPP TS 45.005. 1.1 References The following documents contain provisions
24、which, through reference in this text, constitute provisions of the present document. - References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. - For a specific reference, subsequent revisions do not apply. - For a non-specific refere
25、nce, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document. 1 3GPP TR 21.905: Vocabulary for 3GPP Specifications. 2 3GPP TS 45
26、.001: Physical Layer on the Radio Path (General Description). 3 3GPP TS 45.002: Multiplexing and multiple access on the radio path. 4 3GPP TS 45.005: Radio transmission and reception. 5 3GPP TS 45.010: Radio subsystem synchronization. 6 3GPP TS 44.060: Radio Link Control/ Medium Access Control (RLC/
27、MAC) protocol. 7 3GPP TS 43.064: General Packet Radio Service (GPRS). 8 3GPP TS 45.003: Channel Coding. 1.2 Abbreviations Abbreviations used in this specification are listed in 3GPP TR 21.905. In addition to abbreviations in 3GPP TR 21.905 the following abbreviation apply: AQPSK Adaptive Quadrature
28、Phase Shift Keying EC Extended Coverage 2 Modulation format for GMSK 2.1 Modulating symbol rate The modulating symbol rate is the normal symbol rate which is defined as 1/T = 1 625/6 ksymb/s (i.e. approximately 270.833 ksymb/s), which corresponds to 1 625/6 kbit/s (i.e. 270.833 kbit/s). T is the nor
29、mal symbol period (see 3GPP TS 45.010). ETSI ETSI TS 145 004 V13.4.0 (2017-01)63GPP TS 45.004 version 13.4.0 Release 132.2 Start and stop of the burst Before the first bit of the bursts as defined in 3GPP TS 45.002 enters the modulator, the modulator has an internal state as if a modulating bit stre
30、am consisting of consecutive ones (di = 1) had entered the differential encoder. Also after the last bit of the time slot, the modulator has an internal state as if a modulating bit stream consisting of consecutive ones (di= 1) had continued to enter the differential encoder. These bits are called d
31、ummy bits and define the start and the stop of the active and the useful part of the burst as illustrated in figure 1. Nothing is specified about the actual phase of the modulator output signal outside the useful part of the burst. In case of EC operation, the phase during the useful part of contigu
32、ous bursts, belonging to the same blind physical layer transmissions within a TDMA frame, has a fixed relation, see subclauses 2.6 and 2.7. dummy bitsOutput phaseThe useful partThe active part000. .000 1111111111113 tail bits3 tail bitsdummy bits1/2 bit 1/2 bitFigure 1: Relation between active part
33、of burst, tail bits and dummy bits. For the normal burst the useful part lasts for 147 modulating bits 2.3 Differential encoding Each data value di= 0,1 is differentially encoded. The output of the differential encoder is: $(,)ddd diii i= 101 where denotes modulo 2 addition. The modulating data valu
34、e iinput to the modulator is: iiid= +12 11$(,) 2.4 Filtering The modulating data values ias represented by Dirac pulses excite a linear filter with impulse response defined by: g t h t recttT() ()*= where the function rect(x) is defined by: recttTTfor tT= 6T. A spectrally narrow pulse shape, c0(t),
35、which is the linearised GMSK pulse as defined in subclause 3.5 for the normal symbol period. NOTE: The linearised GMSK pulse is not scaled to the reduced symbol period. Hence its duration in terms of the reduced symbol period is 6T. The base band signal is +=iiTiTtcsty )5.2()(0The time reference t =
36、 0 is the start of the active part of the burst as shown in figure 3. This is also the start of the symbol period of symbol number 0 (containing the first tail bit) as defined in 3GPP TS 45.002. For the uplink, the pulse shape that shall be used when transmitting a burst is dependent on the paramete
37、r Pulse format that is sent during assignment (see 3GPP TS 44.060). For the downlink the spectrally narrow pulse shape shall be used. 5.6 Modulation The modulated RF carrier during the useful part of the burst is: )2(00)(Re2)( +=tfjsetyTEtx where Esis the energy per modulating symbol, f0is the centr
38、e frequency and 0is a random phase and is constant during one burst. 6 Modulation format for AQPSK 6.1 Modulating symbol rate The modulating symbol rate is the normal symbol rate which is defined as 1/T = 1 625/6 ksymb/s (i.e. approximately 270,833 ksymb/s), which corresponds to 2*1 625/6 kbit/s (i.
39、e. 541,666 kbit/s). T is the normal symbol period (see 3GPP TS 45.010). 6.2 Symbol mapping The modulating bits are mapped to the quaternary symbols according to Table 5. ETSI ETSI TS 145 004 V13.4.0 (2017-01)163GPP TS 45.004 version 13.4.0 Release 13Table 5: Mapping between modulating bits and quate
40、rnary symbols. Modulating bits for ai, biAQPSK symbol in polar notation si(0,0) je (0,1) je(1,0) je (1,1) je This is illustrated in Figure 5. Figure 5: Mapping of modulating bits to AQPSK symbols The ratio of power between the Q and I channels is defined as the Subchannel Power Imbalance Ratio (SCPI
41、R). The value of the SCPIR is given by ()()dBSCPIR tanlog2010= . The value of shall be chosen such that dBSCPIR 10 . 6.3 Start and stop of the burst Before the first bit of the burst as defined in 3GPP TS 45.002 enters the modulator, the state of the modulator is undefined. Also after the last bit o
42、f the burst, the state of the modulator is undefined. The tail symbols (see 3GPP TS 45.002) define the start and the stop of the active and the useful part of the burst as illustrated in Figure 6. Nothing is specified about the actual phase of the modulator output signal outside the useful part of t
43、he burst. ETSI ETSI TS 145 004 V13.4.0 (2017-01)173GPP TS 45.004 version 13.4.0 Release 13Figure 6: Relation between active part of burst and tail symbols. For the normal burst (see 3GPP TS 45.001) the useful part lasts for 147 modulating symbols. 6.4 Symbol rotation The symbols are continuously rot
44、ated with radians per symbol before pulse shaping, where = pi/2. The rotated symbols are defined as jiiiess = 6.5 Pulse shaping The modulating symbols is as represented by Dirac pulses excite the following linear pulse shaping filter: c0(t), which is the linearised GMSK pulse as defined in subclause
45、 3.5 for the normal symbol period. The base band signal is +=iiTiTtcsty )2()(0The time reference t = 0 is the start of the active part of the burst as shown in figure 6. This is also the start of the symbol period of symbol number 0 (containing the first tail bit) as defined in 3GPP TS 45.002. 6.6 M
46、odulation The modulated RF carrier during the useful part of the burst is: )2(00)(Re2)( +=tfjsetyTEtx where Esis the energy per modulating symbol, f0is the centre frequency and 0is a random phase and is constant during one burst. ETSI ETSI TS 145 004 V13.4.0 (2017-01)183GPP TS 45.004 version 13.4.0
47、Release 13Annex A (normative): Tx filter coefficients for the spectrally wide pulse shape For an oversampling factor of 16, i.e. 5200 ksamples/s, there are 97 Tx filter coefficients c1to c97for the spectrally wide pulse shape. The coefficients are symmetric to c49, i.e. c49k= c49+k. The coefficients
48、 of c1 to c49are listed: 0.00225918460000 0.00419757900000 0.00648420700000 0.00931957020000 0.01259397500000 0.01605878900000 0.01959156100000 0.02292214900000 0.02570190500000 0.02767928100000 0.02852115300000 0.02791904300000 0.02568913000000 0.02166792700000 0.01579963100000 0.00821077000000 -0.
49、00089211394000 -0.01114601700000 -0.02201830600000 -0.03289439200000 -0.04302811700000 -0.05156392200000 -0.05764086800000 -0.06034025400000 -0.05876224400000 -0.05209962100000 -0.03961692000000 -0.02072323500000 0.00496039200000 0.03765364500000 0.07732192300000 0.12369249000000 0.17639444000000 0.23478700000000 0.29768326000000 0.36418213000000 0.43311409000000 0.50316152000000 0.57298225000000 0.64120681000000 0.70645485000000 0.76744762000000 0.8229572
