1、 ETSI EN 300 395-4 V1.3.1 (2005-06)European Standard (Telecommunications series) Terrestrial Trunked Radio (TETRA);Speech codec for full-rate traffic channel;Part 4: Codec conformance testingfloppy3 ETSI ETSI EN 300 395-4 V1.3.1 (2005-06) 2 Reference REN/TETRA-05115-4 Keywords TETRA, codec ETSI 650
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6、 copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2005. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTMand the TIPHON logo are Trade Marks curre
7、ntly being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI EN 300 395-4 V1.3.1 (2005-06) 3 Contents Intellectual Property Rights4 Foreword.4 1 Scope 5 2 References 5 3 Defin
8、itions and abbreviations.5 3.1 Definitions5 3.2 Abbreviations .5 4 General .6 5 Radio test configuration, test signals and test modes.6 6 TCH/S channel codec.7 6.1 Objectives.7 6.2 Conformance test methodology7 6.3 Test decoding mode7 6.3.1 General7 6.3.2 TCH/S reference sensitivity performance.8 6.
9、3.3 Methods of measurement for TCH/S testing 8 7 TCH/S speech codec 9 7.1 Objectives.9 7.2 Conformance test methodology9 7.3 Option 1: Internal link method .10 7.3.1 Definition and applicability 10 7.3.2 Conformance requirement and purpose 11 7.3.3 Method of test .11 7.3.3.1 Initial conditions .11 7
10、.3.3.2 Procedure 11 7.3.3.3 Internal link method requirements 12 7.3.3.4 Test requirements13 7.4 Option 2: Baseband method .13 7.4.1 Definition and applicability 13 7.4.2 Conformance requirement and purpose 13 7.4.3 Method of test .14 7.4.3.1 Initial conditions .14 7.4.3.2 Procedure 14 7.4.3.3 Test
11、requirements14 Annex A (normative): TCH/S test cases and conditions for BS and MS receivers 15 Annex B (normative): Codec conformance test vector sequences .17 Annex C (informative): Codec reference test vector sequences .18 Annex D (informative): Bibliography.19 History 20 ETSI ETSI EN 300 395-4 V1
12、.3.1 (2005-06) 4 Intellectual 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 000 314: “Inte
13、llectual 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 (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no inves
14、tigation, 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 European Standar
15、d (Telecommunications series) has been produced by ETSI Project Terrestrial Trunked Radio (TETRA). The present document is part 4 of a multi-part deliverable covering speech codec for full-rate traffic channel, as identified below: Part 1: “General description of speech functions“; Part 2: “TETRA co
16、dec“; Part 3: “Specific operating features“; Part 4: “Codec conformance testing“. National transposition dates Date of adoption of this EN: 24 June 2005 Date of latest announcement of this EN (doa): 30 September 2005 Date of latest publication of new National Standard or endorsement of this EN (dop/
17、e): 31 March 2006 Date of withdrawal of any conflicting National Standard (dow): 31 March 2006 ETSI ETSI EN 300 395-4 V1.3.1 (2005-06) 5 1 Scope The objective of the present document is to define the conformance bounds for the TETRA speech and channel codec as deployed in the TETRA Speech Traffic Ch
18、annel (TCH/S) channel type used in the TETRA Voice plus Data (V+D) equipment. For the speech part of the TCH/S codec, the conformance testing (clause 7 of the present document) consists of a bit-exact test where the reference is pre-computed and fixed. For the TCH/S channel encoding a bit exact conf
19、ormance test is also defined (see clause 6.4). For the TCH/S channel decoding, a non-bit exact test is employed with the specifications designed such that a sufficient quality of performance is met by the TETRA equipment (see clause 6.3). 2 References The following documents contain provisions which
20、, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the
21、latest version applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. 1 ETSI EN 300 394-1: “Terrestrial Trunked Radio (TETRA); Conformance testing specification; Part 1: Radio“. 2 ETSI EN 300 395-2: “Terr
22、estrial Trunked Radio (TETRA); Speech codec for full-rate traffic channel; Part 2: TETRA codec“. 3 ETSI EN 300 395-3: “Terrestrial Trunked Radio (TETRA); Speech codec for full-rate traffic channel; Part 3: Specific operating features“. 3 Definitions and abbreviations 3.1 Definitions For the purposes
23、 of the present document, the terms and definitions given in EN 300 392-2 (see bibliography) and EN 300 394-1 1 apply. 3.2 Abbreviations For the purposes of the present document, the abbreviations given in EN 300 394-1 1 and the following apply: AACH Access Assignment CHannel ACELP Algebraic Code Ex
24、cited Linear Predictive AMR Adaptive Multi-Rate BER Bit Error Rate BS Base Station DAI Digital Audio Interface dBm deciBels relative to one milliWatt ETSI ETSI EN 300 395-4 V1.3.1 (2005-06) 6 MER Message Erasure Rate MS Mobile Station PCM Pulse Coded Modulation PDO Packet Data Optimized PRBS Pseudo
25、Random Bit Sequence PUEM Probability of Undetected Erroneous Message RF Radio Frequency RX ReceiveSTCH STealing CHannel TCH/S full rate Speech Traffic CHannel TDM Time Division Multiplexing TE Terminal Equipment TSS TETRA System Simulator TTCI TETRA Test Connector Interface TX Transmit VAD Voice Act
26、ivity Detector 4 General The conformance testing of the TCH/S channel shall be conducted in identical or similar methodology as specified in EN 300 394-1 1. However, as EN 300 394-1 1 is specified for both the TETRA V+D and TETRA Packet Data Optimized (PDO), only the TETRA V+D part of EN 300 394-1 1
27、 shall be applicable to the present document. Therefore, all references to EN 300 394-1 1 clauses shall refer to the TETRA V+D sections only. For the purpose of the present document, the following where applicable shall apply: - presentation of equipment for testing purposes shall be as specified in
28、 EN 300 394-1 1, clause 4.1; - facilities and information required for testing shall be as specified in EN 300 394-1 1, clause 4.1.1; - choice of radio frequency channels to be tested shall be as specified in EN 300 394-1 1, clause 4.1.2; - interpretation of the measurement results shall be as speci
29、fied in EN 300 394-1 1, clause 4.1.3; - mechanical and electrical design shall be as specified in EN 300 394-1 1, clause 4.2. 5 Radio test configuration, test signals and test modes In order to perform the conformance testing specified in the present document, the Terminal Equipment (TE) shall have
30、been tested to, and passed, the relevant specifications as given in EN 300 394-1 1. Thus, all appropriate logical channel types apart from the TCH/S shall have been tested. In the present document, the TETRA speech and channel codec as specified in EN 300 395-2 2, shall be conformance tested under s
31、tandard TETRA specified configurations. All unspecified or informative parts of the TETRA speech and channel codec shall be disabled and not tested. For example, sub-systems such as the Voice Activity Detector (VAD) as given in EN 300 395-3 3 shall be excluded from the tests in the present document.
32、 If these and other speech related sub-systems are standardized in future phases of TETRA then a separate conformance test may be generated to test these new additions. The present document also covers testing of the AMR 4,75 kb/s speech and channel codec. In the present document, only the standard
33、un-encrypted TCH/S shall be tested. Thus the TEs encryption capability, if implemented by the TE, shall be disabled for the duration of the tests specified in the present document. Similarly, all parts related to the STealing CHannel (STCH) and the eventually associated half slot containing encoded
34、speech shall not be tested and shall not be activated in the test. The test signal T1 shall be as specified in EN 300 394-1 1, clause 5.3.2. ETSI ETSI EN 300 395-4 V1.3.1 (2005-06) 7 In accordance to EN 300 394-1 1, the channel type tested under the present document shall be designated as channel ty
35、pe 15 and 16 for TCH/S channel codec testing and 19 and 20 for TCH/S speech codec testing. For Mobile Station (MS) testing, on frame 1 to 17, table 1 shall apply. For Base Station (BS) testing, on frame 1 to 17, table 2 shall apply. Table 1: Channel type for MS testing Channel type Burst type Block
36、1 Block 2 Broadcast block 15 normal TCH/S PRBS Access Assignment Channel (AACH) 19 normal TCH/S speech codec test Access Assignment Channel (AACH) Table 2: Channel type for BS testing Channel type Burst type Sub slot 1 Sub slot 2 16 normal TCH/S PRBS 20 normal TCH/S speech codec test 6 TCH/S channel
37、 codec 6.1 Objectives The objective of this clause is to specify and present performance limits for the TCH/S channel encoding and decoding sub-system. The TCH/S channel encoder is specified in bit exact terms and is given in EN 300 395-2 2, clause 5, and all TE shall operate according to it. The TC
38、H/S channel decoder is specified in non-bit exact terms and is given in EN 300 395-2 2, clause 6, while an informative example implementation is given in EN 300 395-2 2, annex A. The performance of the TCH/S channel decoder is specified in this clause. 6.2 Conformance test methodology The presentati
39、on of the conformance testing procedures for the TCH/S shall be the same as for the other logical channel types as specified in EN 300 394-1 1. Therefore, as described in EN 300 394-1 1, all conformance test data between the TETRA System Simulator (TSS) and the TE shall be via two ports, namely the
40、antenna port and the test connector. The type tests described in the present document shall be performed under normal test conditions as specified in EN 300 394-1 1, clauses 6.2 and 6.2.1. 6.3 Test decoding mode For the TCH/S channel decoding test mode, the TE under test shall perform the test in a
41、similar manner as other channel coded channels as specified in EN 300 394-1 1, clause 5.2.1. 6.3.1 General The test set up, procedures and measurement methods detailed in EN 300 394-1 1 shall be used in testing TETRA V+D equipment TCH/S performance. The required minimum number of samples and test li
42、mit error rates used in the following TCH/S receiver test are defined such that: a) the probability of passing a bad unit is lower than 0,3 %; b) the probability of passing a good unit, operating on the limit of performance, is at least 99,5 %. ETSI ETSI EN 300 395-4 V1.3.1 (2005-06) 8 The Bit Error
43、 Ratio/Message Erasure Rate (BER/MER) test limits adopted have been selected in order not to pass a unit with a sensitivity performance 1 dB worse than that of a unit which just meets the specification. NOTE: The above definition does not apply to Probability of Undetected Erroneous Message (PUEM) m
44、easurements. 6.3.2 TCH/S reference sensitivity performance The minimum required reference sensitivity performance for V+D equipment is specified in annex A according to test condition, propagation condition and receiver class. The maximum dynamic and static reference sensitivity levels for a BS rece
45、iver under normal test conditions shall not exceed the signal levels shown in table 3. Table 3: BS receiver minimum reference sensitivity Test condition Dynamic reference sensitivity Static reference sensitivity Normal -106 dBm -115 dBm The maximum dynamic and static reference sensitivity levels for
46、 a MS receiver under normal test conditions shall not exceed the signal levels shown in table 4. Table 4: MS receiver minimum reference sensitivity Test condition Dynamic reference sensitivity Static reference sensitivity Normal -103 dBm -112 dBm The TCH/S cases to be tested and the corresponding li
47、mit values for BER and MER are given in tables A.1 to A.5. All MS equipment shall achieve a PUEM on TCH/S class 2 bits of 0,01 % measured in static channel conditions. The test cases, number of required samples and test limit values are given in table A.6. All TCH/S receiver tests shall be carried o
48、ut under normal conditions only. 6.3.3 Methods of measurement for TCH/S testing The test system, test conditions and test configuration used in TCH/S testing are detailed in EN 300 394-1 1, clauses 4 and 5 with the following exceptions: - unlike other protected logical channels, the TCH/S channel sp
49、lits the data bits from the TETRA speech codec into three classes of bits, the lowest priority designated class 0, medium priority designated class 1, and highest priority designated class 2. The assignment of the bits of the TETRA speech parameters to its sensitivity classification shall be as given in EN 300 395-2 2, clause 5.4.1, table 4; - in the case of BS V+D receiver testing the test system shall transmit in T1 time-slot 1 on frames 1 to 17 an uplink channel type 16 burst (see table 5). Table 5: TCH/S uplin
