RF通信系設計標準 - JAXA

1 JERG-2-411 JAXA JAXA Disclaimer The information contained herein is for general informational purposes only. JAXA makes no warranty, express or implied, including as to the accuracy, usefulness or timeliness of any information herein. JAXA will not be liable for any losses relating to the use of the information. 305-8505 2-1-1 JAXA Japan Aerospace Exploration Agency JERG-2-411 ii 1.

2 1 .. 1 .. 1 .. 1 .. 1 .. 2 .. 2 2 ..9 3 ..9 4 RF .. 10 .. 10 .. 11 .. 11 .. 13 .. 27 .. 28 .. 33 .. 33 .. 40 .. 49 .. 50 .. 59 .. 59 .. 63 .. 63 JERG-2-411 1 1 ( JAXA ) TT&C(Tracking, Telemetry & Command) JAXA TT&C S Ka A 2 10^6km B 2 10^6km (4) A (4) (1) (2) Radio Regulations (3) (4) CCSDS Recommended Standards, CCSDS , Radio Frequency and Modulation Systems - Part1.

3 Earth Stations and Spacecraft. (5) CCSDS Recommended Standards, CCSDS , TM synchronization and channel coding . (6) CCSDS Recommended Standards, CCSDS , TC synchronization and channel coding . (7) ITU Recommendations, ITU-R RA769-2, Protection criteria used for radio astronomical measurements JERG-2-411 2 (8) ITU Recommendations, ITU-R SA1157-1, Protection criteria for deep-space research (9) SFCG Recommendations, REC 21-2R4, "Efficient Spectrum Utilization for Space Research Service (Category A) on Space-to-Earth Links (10) SFCG Recommendations, REC 21-3R1, "Use of Sub-Carriers for Space Science Services on Space-to-Earth Links; Category A (11) JERG-2-420C RF (1) JERG-2-400A (2) Phase Lock Techniques F.

4 M. Gardnar (1) TT&C Tracking, Telemetry and Command) (2) (3) (4) Tracking) (5) (6) tele( )+command( ) ( ) (7) tele( )+metry( ) ( ) HK JERG-2-411 3 (8) ( ) (9) (10) (Ranging) Range) Range-Rate) RARR Range And Range-Rate (11) Mission Categories) 2 10^6km A 2 10^6km B (4) (12)

5 Circular Polarization Linear Polarization (13) Residual Carrier System (14) PN (15) 2n n=1 BPSK n=2 QPSK n=4 16 QAM JERG-2-411 4 (16) Necessary Bandwidth (17) Occupied Bandwidth 99% (18) Frequency Sweep Range PLL (19) Frequency Sweep Rate 1 (20) Frequency Stability (21) Modulation Scheme) AM FM PM (22)

6 Modulation Index (rad) (23) Carrier Frequency Subcarrier Frequency) RF RF (24) RF RF JERG-2-411 5 (25) Code Type) NRZ-L Bi-phase-L (26) Bit synchronization Time) (27) Acquisition Sequence 1 0 (28) Bit Rate , Symbol Rate bps /sec NRZ-L, NRZ-M, 4 Bi-phase-L (i) (ii) (i) (ii) QPSK I Q 2 1 (29) Bit and Symbol Transition Rate 1 0 (4) 1,000 1 0 0 1 125 (30) (Best Lock Frequency)

7 (31) , (32) Doppler Compensation JERG-2-411 6 (33) Coherent (34) (Forward Link) (35) (Return Link) (36) (False Lock) RF PN PN PN (37) (38) PN PN Code Characteristics) PN (39) Gold Code)

8 PN mod-2 JERG-2-411 7 (40) mod-2 modulo-2 addition 2 mod2(0,0)=0, mod2(0,1)=1, mod2(1,0)=1, mod2(1,1)=0 (41) Convolutional Code (42) mark-to-space ratio (43) Differential Encoding) QPSK n+1 S(n) S(n+1) 0 S(n)=S(n+1) n 1 S(n) S(n+1) (44) Ambiguity (45) Phase Noise JERG-2-411 8 No.

9 1 AOS Acquisition of Signal 2 Bi-phase-L, M, S Bi-phase-Level, Mark, Space 3 bps bit per second 4 BPSK Binary Phase Shift Keying 2 5 CCSDS Consultative Committee for Space Data System ) 6 Eb N 0 Energy per data bit to Noise ratio in a 1Hz bandwidth (1 [dB]) 7 8 ITU International Telecommunication Union 9 10 NRZ Non Return to Zero PCM 11 NRZ L, M, S Non Return to Zero - Level, Mark, Space 12 OQPSK Offset Quadra-Phase Shift Keying ( 4 ) 13 PCM Pulse Code Modulation 144 PLL Phase Lock Loop 15 PN Pseudo Noise 16 PSK Phase Shift Keying 17 QAM Quadrature Amplitude Modulation 18 16 QAM 16 Quadrature Amplitude Modulation 19 QPSK Quadra-Phase Shift Keying 4 20 21 RSS Root Sum Square 2 22 SFCG Space Frequency Coordination Group 23 24 sps symbol per second 25 26 27 TT&C Tracking Telemetry and Command 28 29 30 JERG-2-411 9 2 3

10 RARR RARR RF ( (11)) JERG-2-411 10 4 RF TT&C (1) (2) (3) (1) (2) (3) JERG.