第26届中国飞行器测控学术会议论文集

章节摘录

版权页：   插图：   13.3.2.1 Synchronization Technology Signal synchronization is vital, because it directly affects whether subsequentsignals could be processed normally and the acquisition of measurement infor-mation. The synchronization of MC-2D-SS includes the carrier synchronization,symbol timing synchronization and clock synchronization. Carrier synchronizationis to provide a coherent carrier which is the same frequency and phase withreceived signal. Symbol timing synchronization is to determine the beginning andending time of each OFDM symbol, which also mean determining the accurateFFT position of the window. Clock synchronization is to ensure that the receivingterminal and the sending terminal have the same sampling frequency. Amongthem, Carrier and symbol timing synchronization methods are generally dividedinto three types: 1. data aided algorithm: estimation based on the specific training information which was embedded in a transmitted signal. 2. un-data aided algorithm （or blind algorithm）: The synchronization relies entirely on OFDM signal itself or its spectral characteristics. 3. algorithm based on the cyclic prefix: estimation by using the signal's cyclic prefix. In the three algorithms, data aided algorithm is fast, accurate and highly reli-able, which could extend the estimation range by appropriate select samplenumber between training symbols, but the transmission of auxiliary symboloccupies system resources and reduces the utilization efficiency of spectrum resources. Blind synchronization only applies to some cases whose estimation performance is general and complexity is high. The merits of the algorithm based on cyclic prefix are that the calculation amount is small and the algorithm is simple, but the frequency estimation range is small and the time estimation is rougher. In addition, because the received signal is a spread spectrum signal and we know the received signal spread spectrum sequence, so we could adopt the related method to estimate the carrier frequency and symbol time. In aerospace TT&C, because of the high relative velocity between spacecraft and ground station, there exists large Doppler frequency offset, which will destroy the orthogonality between sub-carriers of MC-2D-SS and lead to the mutual interference between the sub-channels. So how to realize the carrier synchroni- zation of MC-2D-SS signal with large Doppler frequency offset is the priority among priorities.

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《第26届中国飞行器测控学术会议论文集——共享灵活的测控系统》
part i spacecraft tt&c system design and research
1 space-based ma tt&c system and technologies
jianping hu, hongjun yang and maoge xu
2 the investigation of a novel reentry telemetry system
xingwen ding, ming chen, xifu huang and ling wu
3 research on united tracking schemes based on a new information
frame format
haitao nan, zhiqiang li, wenming zhu, peng jia and feilong li
4 a research on the architecture design of space tracking,
telemetry and control networks
xiangyang lu, lijuan jla, jin hu, jianguang wu and shiyong du
5 discussion on integration management of tt&c
information
yunsheng hao and linfeng shang
6 informatization maintenance of tt&c system based on cbm
meng ren, weijing zhou, jianhua guo and zhongkai guo
7 preliminary research on management of crosslinks of navigation
constellations and their security system
kunmei cao, taoming chen and bo wang
8 study on threats to security of space tt&c systems
qi wang, bo wang and bin wu
9 construction strategy research on new generation central computer
system of launch centre
shijie song, zhe wang, liping zhang and yongliang yang
.10 the application of
ofdm in uav telemetry
hailong zhao, jian zhang and jie zhou
11 tt&c system design based on protocols and master-slave
structure
feng xu, xiaofang wang and jianhong zhao
12 study on the application of lt code technology in deep space
communications
tong guo, daheng zhao and xudong li
13 application of multicarrier 2-dimension spread spectrum in
aerospace tt&c
jinbao wang, wenge yang and dong liu
14 parameter estimation of frequency hopping signals based on time
frequency analysis
wenge yang, meng li, libin wang and hao zhang
part ii instrumentation and control technology
15 flexible hemispherical simultaneous multi-beam tt&c
technology
pengyi wang, yongfei kong and haizhou wu
16 fast identification and modification of angle error based on
prior information of velocity-measurement radar
jianping pan, bo qiang, zongwei liu, yanan hu and shengxi
wang
17 optimized simulation analysis of netted ground-based radars for
near space vehicle
daqing chen, dan liu, rongchun wang and zhe zhang
18 techniques of high efficiency and linearity transmitter
tao cao, rong zeng and youjiang liu
19 analysis of feed defocus's effects on a ka-band parabolic
antenna
guolong he
20 study on isar imaging of stepped-frequency chirp signal
haotian yuan, shuliang wen and zhen cheng
21 a carrier acquisition and tracking algorithm for high-dynamic
weak signal
ruifeng duan, rongke liu, you zhou, qingping song and zhiqiang
li
22 an acquisition algorithm for ds/fh tt&c signal using
subband-accumulation method
xiao chen, zhiqiang li, wenming zhu and dekan lou
23 anti-fading analysis of diversity-synthesized technology
mingxin kou and jun yan
24 analysis on the application of feed-forward technology for space
tracking, telemetering and control ships
dingxin yang and ting yuan
25 a telemetry data fusion method based on optimal weighted
ping jiang, yangwei dong and xuemei zou
26 a data fusion method of multi-sources measurement data based on
federated ukf filter
hong chen, jian jiang and lin wang
27 dim and weak target detection technology based on
multi-characteristic fusion
jia tang, xin gao and gang jin
28 distortion correction for optical measurement systems in a test
range
rujie wang, liangliang wang, lei zhang and jia tang
part iii information transfer and processing
29 research on multi-path qos routing strategy for the satellite
network
guanghua song, mengyuan chao, bowei yang, hua zhong and yao
zheng
30 constant modulus blind equalization analysis for high speed
implementation
dalong yang, dahai chen and wen kuang
31 study on space mission ip network qos technologies
yunjun chen, yan liu and shengwang xu
32 system level design of address allocation for a private ip
network
yalin huang, zongyin zhao, yan liu and xu yao
33 research on the qos guaranteed mechanism for the private ip
network
lihua liu, tun wu, zongyin zhao and qian zhang
34 distributed data service platform based on narrowband network
environment
xu yan, guoping hu and dahai zhai
35 impact analysis of the leap second to the computer system in
beijing aerospace control center
tonghua li, yuqiu liang and xia wang
36 the exploration and practice of itinerant testing for tt&c
device software at the launch range
peng fu, wei li, liang zhao, wei zhang and jing zhang
37 research on quality assurance method based on software defect
analysis
qianran si and guoying yan
part iv trajectory, orbits and navigation
38 single-station orbit determination with astrometric positioning
and slr techniques
guoping chen, xiaogong hu, yong huang, yong yu, zhenghong tang,
zhongping zhang and yezhi song
39 on nominal formation flying orbit with a small solar system
body
yuhui zhao, shoucun hu, xiyun hou and lin liu
40 on orbit control utilizing solar sails around asteroids
shengxian yu, xiyun hou and lin liu
41 orbit determination of lunar probe brake course based on
compensation to dynamic parameters
shijie chen, lan du, zhongkai zhang, quying danzeng, ruopu wang, he
wang and qifu zhang
42 a modified iae algorithm for gnss and imu integration.
peng li, chan li, xiangjun wu and zhonggui chen

作者简介

《第26届中国飞行器测控学术会议论文集:共享灵活的测控系统》精选并收录了第26届中国飞行器测控学术会议的优秀论文42篇。内容覆盖了测控总体技术、测量与控制技术、信息传输与处理技术、弹道轨道与导航技术等4个方面，反映了我国航天测控领域的最新科研进展。

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