1、 TIA TELECOMMUNICATIONS SYSTEMS BULLETIN Wireless Communications System Performance In Noise And Interference Limited Situations Recommended Methods for Technology- Independent Modeling, Simulation, And Verification TSB-88-B-1 (Addendum No. 1 to TSB-88-B) May 2005 TELECOMMUNICATIONS INDUSTRY ASSOCIA
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7、 determine the applicability of regulatory limitations before its use. (From Standards Proposal No. 3-4744-RV2-AD1, formulated under the cognizance of the TIA TR-8.18 Subcommittee on Wireless Systems, Compatibility). Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION Standards and Technology Depar
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21、cations Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TSB-88-B-1 1 SCOPE This document is an addendum to TIA Telecommunications Service Bulletin TSB-88-B. It is intended to clarify the default ENBW of ana
22、log FM receivers that are deployed in the VHF and UHF bands as indicated in Annex A and Table 2. Radios in the VHF (high band) that utilize 5 kHz deviation often use an IF bandwidth of 16 kHz Radios in the UHF (380 - 512 MHz) that utilize 5 kHz deviation often use an IF bandwidth of 16 kHz. Radios i
23、n the 800 MHz band but not the NPSPAC band that utilize 5 kHz deviation often use an IF bandwidth of 16 kHz Radios in the 800 MHz band that operate in the NPSPAC band with 4 kHz deviation require a narrower IF bandwidth to achieve a 20 dB ACRR. Narrow analog FM radios do not provide 60 dB ACRR unles
24、s a very narrow ENBW in utilized. Some manufacturers do not provide this capability as it is not required by TIA/ANSI 603C. Various editorial errors are also corrected. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking
25、 permitted without license from IHS-,-,-TSB-88-B-1 2 5.5.1 BER vs. Eb/No The 16 kHz ENBW used with the Butterworth 4p-3c model provides over 70 dB ACRR at 25 kHz. However the 800 MHz band involving the NPSPAC channels necessitates a narrower ENBW to meet the 20 dB Offset channel requirement. Using r
26、educed deviation analog modulation, 4 kHz deviation, calculates that a 12.6kHz ENBW is needed to provide 20 dB ACRR. To achieve this value against 5 kHz deviations necessitates an even narrower ENBW, 11.1 kHz. To clarify these cases, replace Table 2 and its footnotes. New Table 2 Table 2. IF Filter
27、Specifications for Simulating Receivers Modulation Type1ENBW (kHz) IF Filter Simulation2,3Analog FM (25 kHz) 5 kHz 16.0/12.64Butterworth 4 - 3 Analog FM (25 kHz) 4 kHz (NPSPAC) 12.6/11.14Butterworth 4 - 3 Analog FM (12.5 kHz) 2.5 kHz 7.85Butterworth 4 - 3 C4FM / Analog FM (12.5 kHz) 2.5 kHz 5.55 RRC
28、, =0.2 CQPSK 5.5 RRC, =0.2 CVSD (25 kHz) 4 kHz 12.6 Butterworth 4 - 3 CVSD (25 kHz) 3 kHz NPSPAC 10.1 Butterworth 4 - 3 DIMRS-iDEN18.0 RRC, =0.2 EDACS(IMBE) (25 kHz) 8.0 / 6.96Butterworth 5 - 4/ 4 - 3 EDACS(IMBE) (25 kHz NPSPAC) 7.5 / 6.26Butterworth 5 - 4/ 4 - 3 EDACS(IMBE) (12.5 kHz) 6.7 / 5.46But
29、terworth 5 - 4/ 4 - 3 F4FM TDMA-2 9.6 Butterworth, 10 - 4 OPENSKYF4GFSK (AMBE) 12.4 Butterworth, 10 - 4 /4 DQPSK (IMBE) TDMA (12.5 kHz) 9.5 Butterworth 4 - 3 TETRA 18.0 RRC, =0.2 Tetrapol 7.2 Butterworth, 10 - 4 SAM Wideband Digital 50 kHz 38.4 RRC, =0.2 SAM Wideband Digital 100 kHz 76.8 RRC, =0.2 S
30、AM Wideband Digital150 kHz 115.2 RRC, =0.2 Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TSB-88-B-1 3 1Annex A contains additional information on the various modulation types.
31、 2Butterworth filters. The first number indicates the number of poles, the second number, indicates the number of cascaded sections. The 4p-3c configurations are limited to older analog type radios. 3 See Table 4 and Table 5 for additional information. 4 Wideband analog radios can achieve 70 dB ACRR
32、 25 kHz spacing with the 16 kHz ENBW IF in the 150, 450 and 800 MHz bands. The narrower ENBW is appropriate for 800 MHz band radios that also operate in the NPSPAC portion of the 800 MHz band where an Offset Channel Selectivity of 20 dB 603 is produced by 4 kHz deviation interferers. The 11.1 ENBW i
33、s appropriate for radios providing 20 dB from 5 kHz interferers offset by 12.5 kHz. 5Narrow analog receivers can achieve 45 dB ACRR (Class A 603) with an ENBW of 7.8 kHz. To achieve an ACRR 60 dB as might be applicable where narrow analog and C4FM are intermixed on adjacent channels, the IF similar
34、to the C4FM digital radios is more appropriate.6The EDACSuses the wider ENBW for specifications, and the narrower ENBW for ACCPR determination using the 4p-3c model. Note 5 points out the concern of mixing narrow analog FM and digital C4FM using only the analog requirement that is satisfied by the 7
35、.8 kHz ENBW model. The analog radio 45 dB Class A and 40 dB Class B ACRR values 603 are low compared to the 60 dB Class A and 50 dB Class B digital requirements 102. In addition, comments are added in A.4.2.2 and A.4.3.2 pointing out the different ENBW requirements. A.4.2.2 Typical Receiver Characte
36、ristics 12K6B0403, to achieve 20 dB offset channel selectivity in the 800 MHz NPSPAC band 11K1B0403, to achieve 20 dB offset channel selectivity in the entire 800 MHz band for 12.5 kHz channel spacing. A.4.3.2 Typical Receiver Characteristics Use 16K0B0403 for high band (150 MHz) and UHF (460 MHz) r
37、eceivers and 800 MHz receivers in the 800 MHz band that do not operate in the 800 MHz NPSPAC band. Use 12K6B0403 for receivers that operate in the 800 MHz NPSPAC band. Use 11K1B0403, for receivers claiming 20 dB offset channel selectivity from 5 kHz modulation at 12.5 kHz channel spacing in the non
38、NPSPAC portion of the 800 MHz band. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TSB-88-B-1 4 7.6 Terrain Elevation Dataset Last paragraph, first sentence. Delete “Despite th
39、ese uncertainties”. This is a carry over comment from TSB-88-A and is no longer applicable. 8.7.5.4 Inbound vs. Outbound Measurements Replace Table 26 with the corrected Table 26 below. Incorrect footnote 4 for Undefined test should be footnote 5. Table 26 CATP Metric Objective Test Subjective Test
40、Digital (Single Site) BER% & SSI1)OK Analog (Single Site) SSI OK Digital (Simulcast) BER% & SSI1)OK Talk-Out Test Analog (Simulcast) N/A (data for info only) Recommended Digital (Single Site) BER% & SSI 2) OK Analog (Single Site) SSI 2)OK Digital (Multi-Site) 3,4)BER% & SSI 2)OK Analog (Multi-Site)
41、3,4)SSI 2)OK Digital (Voting) Undefined test 5)Recommended Talk-In Test Analog (Voting) Undefined test 5)Recommended 1.Measured BER% is the preferred method. However, SSI provides additional information about identifying potential interference. See 8.11. 2.Failures due to interference should be agre
42、ed upon prior to testing as to whether they are counted or not. 3.Evaluate difference in link budget and use in conjunction with Talk-Out Testing as applicable, Error! Reference source not found 4.Individual tests per site. 5.Current test signals (Table A-2, O.153) cannot proceed past the base recei
43、ver. Therefore enhancements due to voting cannot be objectively determined until a more elaborate test is developed. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TSB-88-B-1 5
44、 A-1 Projected CPC Requirements for Different DAQs. Under EDACSNarrowband Digital an inadvertent 7 was included in the Cf/(I+N) for DAQ = 3 column. Replace Table A-1 with the corrected Table A-1 below. Table A- 1. Projected CPC Requirements for Different DAQs Modulation Type, (channel spacing) Stati
45、c1. refCNs/DAQ-3.02. ()BERCINf%/+DAQ-3.43. ()BERCINf%/+DAQ-4.04. ()BERCINf%/+Analog FM 5kHz (25 kHz) 12 dBS/4dB N/A/17 dB N/A/20 dB N/A/27 dB Analog FM 4kHz (25 kHz)512 dBS/5dB N/A/19 dB N/A/22 dB N/A/29 dB Analog FM 2.5kHz (12.5 kHz) 12 dBS/7dB N/A/23 dB N/A/26 dB N/A/33 dB C4FM (IMBE) (12.5 kHz)65
46、%/5.4 dB 2.6%/15.2 dB 2.0%/16.2 dB 1.0%/20.0 dB C4FM (IMBE) (12.5 kHz)75%/7.6 dB 2.6%/16.5 dB 2.0%/17.7 dB 1.0%/21.2 dB CQPSK (IMBE) (12.5 kHz)65%/5.4 dB 2.6%/15.2 dB 2.0%/16.2 dB 1.0%/20.0 dB CQPSK (IMBE) (12.5 kHz)75%/7.6 dB 2.6%/16.5 dB 2.0%/17.7 dB 1.0%/21.2 dB CQPSK (IMBE) (6.25 kHz) 5%/7.6 dB
47、2.6%/16.5 dB 2.0%/17.7 dB 1.0%/21.2 dB CVSD “XL” CAE (25 kHz) 8.5%/4.0 dB 5.0%/12.0 dB 3.0%/16.5 dB 1.0%/20.5 dB CVSD “XL” CAE (NPSPAC)88.5%/4.0 dB 5.0%/14.0 dB 3.0%/18.5 dB 1.0%/22.5 dB C4FM (VSELP)* (12.5 kHz)65%/5.4 dB 1.8%/17.4 dB 1.4%/19.0 dB 0.85%/21.6 dB C4FM (VSELP)* (12.5 kHz)75%/7.6 dB 1.8
48、%/17.4 dB 1.4%/19.0 dB 0.85%/21.6 dB DIMRS (25 kHz) 5%/12.5 dB 2.0%/22.0 dB 1.5%/23.0 dB 1%/25.0 dB EDACSWideband Digital (25 kHz) 5%/5.3 dB 2.6%/14.7 dB 2.0%/15.7 dB 1.0%/19.2 dB EDACSNPSPAC8Digital 5%/6.3 dB 2.6%/15.7 dB 2.0%/16.7 dB 1.0%/20.2 dB EDACSNarrowband Digital 5%/7.3 dB 2.6%/16.7dB 2.0%/
49、17.7 dB 1.0%/21.2 dB F4FM (IMBE) TDMA-2 (12.5 kHz) 5%/6.2 dB 2.6%/15.6 dB 2.0%/16.9 dB 1.0%/20.0dB F4GFSK (AMBE) OpenSky5%/9.0 dB 3.5%/15.3 dB 2.5%/16.4 dB 1.3%/20.1 dB /4 DQPSK (IMBE) TDMA (12.5 kHz) 5%/6.9 dB 2.6%/15.2 dB 2.0%/16.4 dB 1.0%/19.5 dB TETRA 5%/8 dB 4%/12.0 dB 2%/16.0 dB 1%/18.0 dB Tetrapol 5%/4.0 dB 1.8%/14.0 dB 1.4%/15.0 dB 0.85%/19.
