1、 66 GY/T 1972003 Uniform technical specification for digital satellite news gathering 2003-10-29 2003-12-01 G Y GY/T 1972003 . II III 1 1 2 1 3 1 4 DSNG 2 5 3 6 3 7 3 8 6 I GY/T 1972003 ITU-R SNG.1007-1 II GY/T 1972003 DSNG DSNG DSNG III GY/T 1972003 1 2 GB 9159-1988 GB 12638-1990 GB 13615-1992 GB/T
2、 17700-1999 GB/T 17975.1-2000 1 GB/T 17975.2-2000 2 GB/T 17975.3-2002 3 ITU-R BO.1211 11/12GHz ITU-R S.524-7 6GHz 14GHz 30GHz GSO EIRP ITU-R S.580 ITU-R S.726 ITU-R SNG.722-1 ITU-R SNG.770-1 ITU-R SNG.1007-1 ITU-R SNG.1152 ITU-R SNG.1421 ETSI EN 301 210 ETSI TR 101 221 ETSI ETS 300 327 IESS 308 / QP
3、SK 3 3.1 digital satellite news gathering DSNG 3.2 1 GY/T 1972003 8PSK Eight Phase Shift Keying BER Bit Error Ratio DSNG Digital Satellite News Gathering EIRP Equivalent Isotropically Radiated Power GSO Geostationary-Satellite Orbit IF Intermediate Frequency IRD Integrate Receiver Decoder QEF Quasi-
4、Error-Free QPSK Quaternary Phase Shift Keying RF Radio Frequency RS Reed-Solomon - UPS Uninterrupted Power Supply 4 DSNG DSNG 1 IRD DSNG 1 DSNG 2 GY/T 1972003 DSNG IRD 5 5.1 GB 12638-1990 5.2 GB 9159-1988 6 GB 13615-1992 7 7.1 7.1.1 MPEG-2 4:2:0MPML MPEG-2 4:2:2PML GB/T 17975.2-2000 7.1.2 MPEG-2 GB/
5、T 17975.3-2002 7.2 2 (204, 188) 8PSK n 2 1 =0.35 a QPSK (I=12) RS RF MPEG-2 a 8PSK =0.25 2 7.2.1 DSNG GB/T 17700-1999 7.2.2 QPSK 8PSK GB/T 17700-1999 3 GY/T 1972003 QPSK 0.35 8PSK 0.35 0.25 7.2.3 Eb/N0 1 1 bit/symbol Eb/N0 adB 1/2 0.92 4.5 2/3 1.23 5.0 3/4 1.38 5.5 5/6 1.53 6.0 QPSK 7/8 1.61 6.4 2/3
6、 1.84 6.9 5/6 2.30 8.9 8PSK 8/9 b2.46 9.4 a RS BER=2 10 4 , RS QEF Eb/N0 b 8PSK 8/9 7.3 7.3.1 GSO 3 ( 3) 1 20 90% 1 G =29-25Log( ) ( 1 20 ) (1) G (dBi) 14dB 7.3.2 -1dB 30dB 25dB -1dB 1.06 7.4 7.4.1 EIRP 1dB/d 7.4.2 0.025R 3.5kHz R 7.4.3 7.4.4 EIRP GSO 3 3 6GHz EIRP 2 4 GY/T 1972003 2 6GHz EIRP 4kHz
7、EIRP (3225log)dB(W/4kHz) 02.5 87 11dB(W/4kHz) 07 9.2 (3525log)dB(W/4kHz) 09.2 48 7dB(W/4kHz) 48 180 GSO 3 3 14GHz EIRP 3 3 14GHz EIRP 40kHz EIRP (3925log)dB(W/40kHz) 02.5 87 18dB(W/40kHz) 07 9.2 (4225log)dB(W/40kHz) 09.2 48 0dB(W/40kHz) 48 180 GSO 3 EIRP 2 3 3dB 1 3 GSO 7.4.5 EIRP EIRP -1dBW/4kHz 5 GY/T 1972003 8 DSNG -35C 55C 5% 100% 16m/s 3600m 1000W/m 2 220V 10%/50Hz 1Hz UPS 6
