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CN101188589B - Synchronization adaptation method and device for broadcast data in satellite synchronization distribution network - Google Patents

Synchronization adaptation method and device for broadcast data in satellite synchronization distribution network Download PDF

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CN101188589B
CN101188589B CN 200610118367 CN200610118367A CN101188589B CN 101188589 B CN101188589 B CN 101188589B CN 200610118367 CN200610118367 CN 200610118367 CN 200610118367 A CN200610118367 A CN 200610118367A CN 101188589 B CN101188589 B CN 101188589B
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satellite
band
wave
broadcast
ku
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CN 200610118367
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CN101188589A (en )
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宋伯伟
封斌
张震宁
王虎
顾伟峰
龚飙
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上海瑞高信息技术有限公司
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Abstract

The invention discloses a synchronous adapting device for broadcast data in a satellite synchronous distribution network and a method thereof. The device comprises an information source multiplexer, a Stimi stimulator, an OFDM modulator and a TDM modulator, wherein, the information source multiplexer outputs the broadcast service data; the Stimi stimulator is connected with the information sourcemultiplexer, and the Stimi stimulator performs channel encoding to the broadcast service data output from the information source multiplexer, and symbols after the channel encoding are output in two ways; the OFDM modulator receives the symbols of the first way and performs outputting after the OFDM modulation; the OFDM signal is sent to a synchronous orbit satellite through a Ku wave band groundtransmitter in Ku wave band after passing through a time delay module, and is transmitted after being transduced to the S wave band through a satellite; the TDM modulator receives the symbols of the second way, ordered TS flow is formed on the basis of the frequency point and the time slot of the symbols, DVB-S encoding and QPSK modulation are performed to the TS flow, a synchronizing sequence isinserted into the TS flow, and then the TS flow is output; the QPSK signal is sent to the synchronous orbit satellite in a time division multiplex TDM way when passing through the Ku wave band groundtransmitter, and is directly transmitted in Ku wave band through the satellite.

Description

广播数据在卫星同步分配网中的同步适配方法及装置 Adapting broadcast data synchronization method and apparatus of the synchronous satellite distribution network

技术领域 FIELD

[0001] 本发明涉及卫星同步分配网中的同步技术,更具体地说,涉及一种卫星同步分配网中广播数据的同步适配装置。 [0001] The present invention relates to synchronization technology synchronous satellite distribution network, and more particularly, to a network adapter device synchronous satellite broadcast data synchronization distribution.

[0002] 背景技术 [0002] BACKGROUND OF THE INVENTION

[0003] 数字卫星广播系统主要利用卫星S波段OFDM信号直接广播提供全国范围内的业务覆盖;而对于城市中地面电波环境比较复杂、或者室内无法方便接收卫星广播信号的地区,采用地面转发器的形式,将卫星传输的Ku波段的TDM信号转换成S波段OFDM信号广播出去,作为卫星S波段直接广播OFDM信号的补充。 [0003] The main digital satellite broadcasting system using a satellite S band OFDM signal provides a direct broadcast nationwide service coverage; for urban ground wave environment is complex, not easily or interior region receiving a satellite broadcast signal, terrestrial repeaters using form, converts the Ku-band satellite transmission TDM signal to the S-band OFDM signal is broadcast out as a direct broadcast satellite S band OFDM signal is added. 这种方案可以兼顾用户对广播业务覆盖范围和接收质量的要求,在全国范围内迅速有效地建立起数字多媒体广播网络。 This scheme may take into account the user's requirements for coverage and broadcast service reception quality, quickly and efficiently establish a digital multimedia broadcasting network in the country.

[0004] 我国幅员辽阔、卫星信号到达各地的传输延迟相差很大(例如卫星信号到达北京和上海将具有相差毫秒级的传输延迟),这种延迟将严重影响整个系统的性能,因此,如何克服传输延迟,做到传输同步是一个十分受到关注的问题。 [0004] China has a vast, satellite transmission signals arrive from all over the delays vary widely (eg satellite signal reaches Beijing and Shanghai will have a difference of milliseconds propagation delay), this delay will seriously affect the overall system performance, therefore, how to overcome transmission delay, so that synchronous transmission is a matter of great concern.

[0005] 发明内容 [0005] SUMMARY OF THE INVENTION

[0006] 本发明的目的旨在提供一种卫星同步分配网中广播数据的同步适配装置,用于在卫星同步分配网中的发射端进行同步适配。 [0006] The object of the present invention is to provide an adapter device synchronous satellite broadcast network synchronization data allocated at the transmitting end for a satellite distribution network synchronization adaptation of synchronization.

[0007] 根据本发明的一方面,提供一种卫星同步分配网中广播数据的同步适配装置,包括:信源复用器,输出广播业务数据;Stimi激励器,连接到信源复用器,将信源复用器输出的广播业务数据进行信道编码,信道编码后的符号分为两路输出;OFDM调制器,接收第一路符号并进行OFDM调制后输出;该OFDM信号通过一延时模块后经由Ku波段地面发射机以Ku波段发送给同步轨道卫星,并由卫星将该信号变频到S波段后转发;还包括TDM调制器,接收第二路符号,基于符号的频点和时隙形成有序的TS流,对TS流进行DVB-S编码,再进行QPSK调制并插入同步序列后输出;该QPSK信号经由Ku波段地面发射机以时分复用TDM的方式发送给同步轨道卫星,并由卫星将QPSK信号直接以Ku波段转发。 [0007] According to an aspect of the present invention, there is provided apparatus adapted to synchronize a network synchronous satellite broadcast data distribution, comprising: a source multiplexer, the output of the broadcasting service data; Seimei actuator, connected to the source multiplexer , the broadcast service data source output from the multiplexer channel coding, channel encoded symbols into two outputs; the OFDM modulator, receiving the first OFDM symbol and the modulated output; the OFDM signal by a delay after the transmission module via the Ku-band to Ku band terrestrial transmitters to geosynchronous satellite, the satellite signal by the frequency conversion to S band forward; TDM modulator further comprising, receiving a second channel symbols, and the symbols based on the frequency slot an ordered stream TS, the TS stream DVB-S coding, QPSK modulation, and then insert the synchronization sequence output; the transmitted QPSK signal to a time multiplexed TDM manner via a Ku-band geosynchronous satellite terrestrial transmitters, and the QPSK signal is directly forwarded by the Ku band satellites.

[0008] 根据本发明的一实施例,经信道编码后的第二路符号通过一接口发送给TDM调制器,其中,所述接口码流数据的发放顺序为:首先依次发送第一时隙的第一频点内的所有OFDM点,然后发送第一时隙的第二频点内的所有OFDM点,再发送第一时隙的第三频点内的所有OFDM点,至此完成第一时隙的符号发送,之后发送第二时隙的符号,直至完成所有时隙的符号的发送。 [0008] According to one embodiment of the present invention, the transmission path via the second channel encoded symbols via an interface to the TDM modulator, wherein the release order for the interface to the code stream data: first sequentially transmitting a first slot All points in the first OFDM frequency, then all points within the second OFDM frequency of the first transmission slot, all the points in the third OFDM frequency retransmission of the first slot, thereby completing the first slot transmission symbols, symbols of the second slot after the transmission until completion of transmission of all symbols in a slot.

[0009] 根据本发明的一实施例,TDM调制器将所述每一时隙的每一频点的符号打包成一数据段,所述数据段包括头部字段和内容字段,所述头部字段包括分别指示频点、映射模式、以及信息传输指示的字段;TDM调制器还将每一数据段转换成TS流,其中每一数据段转换成一系列的TS包,每一个所述TS包包括同步字段、传输错误标识字段、时隙标识、传输优先级字段、PID号字段、可变字段、传输加扰控制字段、自适应填充控制字段、连续性指示计数器字段、传输信息字段以及数据载荷字段;所述TS包内码流数据的发放顺序为:首先依次发送第一时隙的第一OFDM点的第一频点,然后发送第一时隙的第一OFDM点的第二频点, 再发送第一时隙的第一OFDM点的所有频点,至此完成第一时隙的第一OFDM点的发送,之后发送第一时隙的第二OFDM点,直至完成第一时隙所有的OFDM点 [0009] According to one embodiment of the present invention, the TDM modulator of the symbols of each time slot in each frequency is packed into a data segment, the data segment comprises a header field and a content field, the header field comprises respectively indicate the frequency points, mapping mode, and a field indicating the information transmission; the TDM modulator also convert each segment into a TS stream, wherein each data segment converted into a series of TS packets, each of said TS packet includes a synchronization field , transmission error identification field, a time slot identifier, transport priority field, the PID number field, a variable field, a transport scrambling control field, the control field is filled adaptation, indicating the continuity counter field, information field, and a data transmission payload field; the said sequence of TS packets distributed stream data: first transmitting a first order a first time slot of the first OFDM frequency point, the first and second OFDM frequency point sent a first time slot, and then transmits the first All the first OFDM frequency point for a slot, thereby completing a first OFDM transmission point of the first slot, after transmitting the second OFDM point of the first slot, the first slot until the completion of all the OFDM points 的发送,再进行第二时隙所有OFDM点所有频点的发送,直至最后一个时隙的所有OFDM点所有频点的发送。 Transmission, then the transmission frequency of all the points of the second time slot on all OFDM, OFDM transmitting all points until the last time slot for all frequency bins.

[0010] 根据本发明的一实施例,所述传输信息字段为MX8比特,其中包含M比特的时间同步信息,所述时间同步信息在每个时隙的第一个频点符号的第一个TS包中插入当前时刻的同步计数器值,其余TS包中的相应字段保留。 [0010] According to one embodiment of the present invention, the transmission of information field bit MX8, which contains M bits, time synchronization information, the time information of the first synchronization point of a first pilot symbol in each slot TS packet sync counter value into the current time, remaining TS packets corresponding field reserved.

[0011] 根据本发明的一实施例,根据OFDM映射模式,确定对应的单个频点传输数据率、 卫星可传输的OFDM频点数;其中,BPSK对应单个频点传输数据率为> 8Mbps,卫星可传输的OFDM频点数为3 ;QPSK对应单个频点传输数据率为> 16Mbps,卫星可传输的OFDM频点数为2 ; 16QAM对应单个频点传输数据率为> 32Mbps,卫星可传输的OFDM频点数为1 ; [0011] According to one embodiment of the present invention, according to the OFDM mapping mode, a single frequency corresponding to the determined transmission data rate, the satellite may transmit the OFDM frequency points; wherein, a single frequency corresponding to the BPSK data transmission rate> 8Mbps, satellites OFDM transmission frequency points is 3; QPSK single frequency corresponding to the transmission data rate> 16Mbps, the satellite may transmit the OFDM frequency points is 2; 16QAM single frequency corresponding to the transmission data rate> 32Mbps, the satellite may be transmitted as the OFDM frequency points 1 ;

[0012] 根据传输模式,确定QPSK传输数据率;其中,3个BPSK频点传输模式对应的QPSK 传输数据率为> 24Mbps ;2个QPSK频点传输模式对应的QPSK传输数据率为> 32Mbps ;1个16QAM频点传输模式对应的QPSK传输数据率为> 32Mbps ; 1个BPSK频点,1个QPSK频点传输模式对应的QPSK传输数据率为> 24Mbps ;2个BPSK频点,1个QPSK频点传输模式对应的QPSK传输数据率为> 32Mbps。 [0012] The transmission mode determining QPSK transmission data rate; wherein three frequency points BPSK QPSK transmission mode corresponding to the transmission data rate> 24Mbps; 2 QPSK-frequency points corresponding to QPSK transmission mode data transmission rate> 32Mbps; 1 a frequency 16QAM QPSK transmission mode corresponding to the transmission data rate> 32Mbps; 1 BPSK-frequency, a frequency point QPSK QPSK transmission mode corresponding to the transmission data rate> 24Mbps; 2 BPSK-frequency, a frequency point QPSK QPSK transmission mode corresponding to the transmission data rate> 32Mbps.

[0013] 根据本发明的一实施例,所述TDM调制器对TS流进行TS空包插入进行速率匹配, 所述TDM调制器包括DVB-S编码器,进行DVB-S编码,包括进行RS (204,188)编码和3/4卷积编码;所述TDM调制器还包括QPSK调制模块,对TS流进行QPSK调制。 [0013] According to one embodiment of the present invention, the TDM modulator stream TS to TS packet inserting null rate matched, the TDM modulator encoder comprises a DVB-S, DVB-S for encoding, including RS ( 204,188) coding, and 3/4 convolutional encoding; the TDM modulator module further comprises a QPSK modulation, QPSK modulation is performed on the TS stream.

[0014] 根据本发明的一实施例,所述TDM调制器还包括时间同步模块,生成时间标记并加入到TS流的时隙指示TS包中。 [0014] According to one embodiment of the present invention, the TDM modulator further includes a time synchronization module, and added to generate a time stamp indicating the time slot TS packet TS stream.

[0015] 根据本发明的一实施例,所述时间同步模块生成伪随机序列作为同步序列;所述TDM调制器还包括同步信号插入模块,将同步序列插入QPSK信号中,其中I、Q两路信号插入同相的同步序列。 [0015] According to one embodiment of the present invention, the time synchronization module generates a pseudo-random sequence as a synchronization sequence; the TDM modulator further comprises a sync signal insertion module, the synchronization sequence is inserted in a QPSK signal, wherein the I, Q two-way signal synchronization sequence is inserted in phase.

[0016] 根据本发明的第二方面,提供一种卫星同步分配网中广播数据的同步适配方法, 包括:通过信源复用器输出广播业务数据;用Stimi激励器将信源复用器输出的广播业务数据进行信道编码,信道编码后的符号分为两路输出;接收第一路符号并进行OFDM调制后输出;该OFDM信号通过一延时模块后经由Ku波段地面发射机以Ku波段发送给同步轨道卫星,并由卫星将该信号变频到S波段后转发;接收第二路符号,基于符号的频点和时隙形成有序的TS流,对TS流进行DVB-S编码,再进行QPSK调制并插入同步序列后输出;该QPSK 信号经由Ku波段地面发射机以时分复用TDM的方式发送给同步轨道卫星,并由卫星将QPSK 信号直接以Ku波段转发。 [0016] According to a second aspect of the present invention, there is provided a method of adapting synchronous satellite broadcast network synchronization distribution data, comprising: outputting a broadcast service data through multiplexer sources; Stimi actuator with the source multiplexer broadcast service data output from the channel coding, the channel encoded symbols into two outputs; after receiving the first OFDM symbol and the modulated output; the OFDM signal via the delay module by a Ku-band to Ku band terrestrial transmitters to a geosynchronous satellite, the satellite signal by conversion to the S-band transponder; receiving a second channel symbols form an ordered stream TS based on frequency and time slot symbol of the DVB-S streams TS coding again QPSK modulation is performed and the output synchronization sequence is inserted; the QPSK signal transmitter TDM time division multiplexed manner to a Ku-band geosynchronous satellite via ground, by the satellite directly to Ku-band transponders QPSK signal.

[0017] 采用本发明的技术方案,能在卫星同步分配网的发射端进行严格的同步控制,以利于实现卫星同步分配网中广播数据的同步适配。 [0017] The technical solution of the present invention can be performed in strict synchronization control transmitter synchronous satellite distribution network, in order to facilitate the synchronization adaptation to achieve synchronous satellite distribution network broadcast data.

[0018] 附图说明 [0018] BRIEF DESCRIPTION OF DRAWINGS

[0019] 在本发明中,相同的附图标记始终表示相同的特征,其中, [0019] In the present invention, like reference numerals refer to like features, wherein

[0020] 图1是用于实现本发明的卫星同步分配网的结构框图; [0020] FIG. 1 is a satellite of the present invention to achieve a structural block diagram of the synchronization distribution network;

[0021] 图2是根据本发明的实施例的卫星同步分配网中广播数据的同步适配装置的结构框图; [0021] FIG. 2 is a block diagram of the network adapter device synchronized broadcast data satellite embodiment of the present invention according to the synchronization distribution;

[0022] 图3是根据本发明的实施例形成TS流过程中每一时隙的每一频点的符号打包成一数据段的示意图;[0023] 图4是根据本发明的实施例的形成TS流过程中进行数据转换的时序格式; [0022] FIG. 3 is a TS stream formed during each symbol of each slot frequency diagram of a packaged into data segments in accordance with an embodiment of the present invention; [0023] FIG. 4 is a TS stream is formed according to an embodiment of the present invention. during timing data conversion format;

[0024] 图5是根据本发明的实施例的形成TS流过程中数据转换的过程示意图; [0024] FIG. 5 is a schematic diagram of the process of forming an embodiment of the present invention the TS stream data conversion process;

[0025] 图6是根据本发明的实施例的QPSK调制的过程示意图; [0025] FIG. 6 is a schematic view of an embodiment of the process according to the present invention is QPSK modulated;

[0026] 图7是根据本发明的实施例的同步序列的结构示意图; [0026] FIG. 7 is a diagram showing the structure of an embodiment of the synchronization sequence of the present invention;

[0027] 图8是根据本发明的实施例的接口码流数据和TS包内码流数据的示意图。 [0027] FIG. 8 is a schematic view of the interface according to the embodiment of the present invention, the code stream and data stream data TS packet.

[0028] 具体实施方式 [0028] DETAILED DESCRIPTION

[0029] 下面结合附图和实施例进一步描述本发明的技术方案。 [0029] The following figures and examples further describe the technical solutions of the invention bind.

[0030] 根据本发明,提供一种卫星同步分配网中广播数据的同步适配装置的发射机,参考图1,图1是用于实现本发明的卫星同步分配网的结构框图。 [0030] According to the present invention, there is provided a device adapted satellite transmitter synchronized network broadcast data synchronization distribution, with reference to FIG. 1, FIG. 1 is a satellite of the present invention to achieve a structural block diagram of the synchronization distribution network. 图1中的卫星300接收来自同步适配装置100的信号,并转发给具有卫星天线302的地面转发器304和用户接收终端306。 300 in FIG. 1 receives satellite signals from the synchronization adaptation unit 100, and transmitted to the satellite antenna 302 having a transponder 304 and the ground terminal 306 receives the user. 继续参考图1,该发射机100包括: With continued reference to FIG 1, the transmitter 100 comprises:

[0031] 信源复用器102,输出广播业务数据; [0031] source multiplexer 102 outputs the broadcasting service data;

[0032] Stimi激励器104,连接到信源复用器102,将信源复用器102输出的广播业务数据进行信道编码,信道编码后的符号分为两路输出;OFDM调制器(图中包括在Mimi激励器104中),接收第一路符号并进行OFDM调制后输出; [0032] Stimi actuator 104, the multiplexer 102 is connected to the source, the broadcast service data source multiplexer 102 outputs the channel coding, the channel encoded symbols into two outputs; the OFDM modulator (FIG. Mimi comprising excitation 104), after receiving the first OFDM symbol and the modulated output;

[0033] 第一Ku波段地面发射机106,连接Mimi激励器104,将经延时的OFDM信号以Ku 波段发送给同步轨道卫星300,并由卫星300将该信号变频到S波段后转发; [0033] The first ground Ku-band transmitter 106, the actuator 104 is connected Mimi, to send to the Ku-band geosynchronous orbit satellites OFDM signal by the delay 300, the signal is downconverted by the satellite 300 to the S-band forward;

[0034] TDM调制器108,接收第二路符号,基于符号的频点和时隙形成有序的TS流,对TS 流进行DVB-S编码,再进行QPSK调制并插入同步序列后输出; [0034] TDM modulator 108, a second reception path symbols form an ordered stream TS based on frequency and time slot symbol of the DVB-S streams TS coding, QPSK modulation, and then insert the synchronization sequence output;

[0035] 第二Ku波段地面发射机110,连接到TDM调制器108,采用时分复用TDM的方式将QPSK数据以Ku波段发送给同步轨道卫星300,并由卫星将QPSK信号直接以Ku波段转发。 [0035] The second ground Ku-band transmitter 110, modulator 108 is connected to TDM, TDM time division multiplexing manner to QPSK data transmission to a Ku-band geosynchronous satellite 300 by the satellite in the Ku-band transponders QPSK signal directly .

[0036] 参考图2,图2是根据本发明的实施例的卫星同步分配网中广播数据的同步适配装置的结构框图,进一步示出了本发明的两个主要部件Mimi激励器104(包括OFDM调制器)和TDM调制器108的结构图。 [0036] Referring to FIG 2, FIG. 2 is a block diagram of the network adapter device synchronized broadcast data satellite embodiment of the present invention according to the synchronization distribution, further shows two main actuator parts 104 Mimi invention (including OFDM modulator structure of FIG.) and the TDM modulator 108.

[0037] 该Stimi激励器104包括: [0037] The actuator 104 Stimi comprising:

[0038] A接口,是Mimi激励器104的输入接口; [0038] A interfaces, the input interface 104 of the actuator Mimi;

[0039] 信源接口模块140,连接到信源复用器102接收广播业务数据; [0039] Source interface module 140, a multiplexer 102 connected to the source receiving broadcast service data;

[0040] 信道编码模块142,对从信源接口模块接收的广播业务数据进行信道编码,并将经信道编码后的符号分两路输出; [0040] The channel coding module 142, the broadcast service data received from the source interface module performs channel coding and channel-coded by the two routes of output symbols;

[0041 ] OFDM调制模块144,接收来自信道编码模块142的第一路输出,进行OFDM调制; [0041] OFDM modulation module 144, from the channel coding module receives a first output 142, performs OFDM modulation;

[0042] 第一数据格式转换模块146,接收自信道编码模块的第二路输出,进行数据格式转换后通过C接口输出给TDM调制器108 ; [0042] a first data format conversion module 146, a second reception path output from the channel encoding module, via the C interface to the TDM modulator 108 outputs the data format conversion;

[0043] 延时模块148,将OFDM调制模块144输出的OFDM信号进行延时; [0043] The delay module 148, the OFDM signal output from OFDM modulation module 144 to delay;

[0044] B接口,将所述延时模块148的输出作为Mimi激励器104的输出。 [0044] B interfaces, the output of the delay module 148 as the output 104 of the actuator Mimi.

[0045] 根据图2所示,B接口的输出通过第一变频放大器141变频放大后输出,其中,B接口输出的是70MHz中频,而第一变频放大器141输出的是IlGHz高频。 [0045] According to FIG. 2, the output interface outputs B frequency amplifier 141 is amplified by the first inverter, wherein, B is a 70MHz IF interface output, and the output of the first inverter amplifier 141 is IlGHz frequency.

[0046] 该TDM调制器108包括: [0046] The TDM modulator 108 comprises:

[0047] 从C接口接收第一数据格式转换模块146的输出; [0047] receives the output of the first data from the format converting module 146 C interface;

[0048] 第二数据格式转换模块180,通过C接口接收第一数据转换模块146的输出,第一数据格式转换模块146和第二数据格式转换模块180共同实现形成TS流过程中的数据转换,输出TS流; [0048] The second data format conversion module 180 receives the output of the first data conversion module 146 via the C interface, the first data format conversion module 146 and a second data format conversion module 180 is implemented together form a TS stream data conversion process, TS stream output;

[0049] DVB-S信道编码模块182,对从第二数据格式转换模块输出的TS流进行DVB-S信道编码; [0049] DVB-S channel coding module 182, the second data format conversion module output stream TS DVB-S channel coding;

[0050] QPSK调制模块184,对经QPSK信道编码的数据进行QPSK调制并插入同步序列后输出; [0050] QPSK modulation module 184, a QPSK-channel QPSK modulation encoded data and outputs the synchronization sequence is inserted;

[0051] 时间同步模块186,生成时间标记提供给第二数据格式转换模块182,还生成同步序列; [0051] The time synchronization module 186 generates a time stamp is supplied to the second data format conversion module 182, also generates a synchronization sequence;

[0052] 同步信号插入模块188,将时间同步模块186产生的同步码插入到QPSK调制模块184产生的QPSK信号中; [0052] The sync signal insertion module 188, the time synchronization module 186 is inserted into the preamble QPSK QPSK modulation signal generated by module 184 generated;

[0053] D接口,将同步信号插入模块188的输出作为TDM调制器108的输出。 [0053] D interfaces, and outputs a synchronization signal inserting module 188 as the output of the TDM modulator 108.

[0054] 根据图2所示,D接口的输出通过第二变频放大器181变频放大后输出,D接口输出的是70MHz中频,而第二变频放大器181输出的是IlGHz高频 [0054] According to FIG. 2, the output interface outputs D conversion is amplified by a second inverter amplifier 181, the output of the D interface is 70MHz IF, the output of the second inverter amplifier 181 is a high frequency IlGHz

[0055] 其中,上述第一数据格式转换模块和第二数据格式转换模块共同实现数据转换, 通过基于LDVS的25针SPI接口实现第一数据格式转换模块和第二数据格式转换模块之间的数据传输。 [0055] wherein said first data format conversion module and a second common data format conversion module for data conversion, data interface between the first data format conversion module and a second data format conversion module based on the 25-pin SPI LDVS transmission. 根据本发明的实施例,TDM调制器将每一时隙的每一频点的符号打包成一数据段,数据段包括头部字段和内容字段,头部字段包括分别指示频点、映射模式、以及信息传输指示的字段。 According to an embodiment of the present invention, the TDM modulator of each symbol of each slot frequency packed into a data segment, the data segment comprises a header field and a content field, a header field including respectively indicate the frequency points, mapping pattern information and field indicates the transmission. 参考图3,图3是根据本发明的实施例形成TS流过程中每一时隙的每一频点的符号打包成一数据段的示意图。 Referring to FIG 3, FIG. 3 is a schematic symbol for each TS stream during each time slot of frequency packed into a data segment is formed according to embodiments of the present invention.

[0056] 其中头部Head的第0字节为Freq字段,表示频点,如表1所示。 [0056] wherein the first head Head Freq 0 byte field indicating the frequency, as shown in Table 1.

[0057] 表IFreq字段定义 [0057] The field definition table IFreq

Figure CN101188589BD00071

[0059] Head第2字节为Map字段,表示后续数据的星座点映射模式。 [0059] Head Map field is the second byte, represents constellation points subsequent data mapping mode. 由于星座点映射模式不同,后续Data的长度也会不同,如表2所示。 Due to the different mode of mapping constellation points, the length of a subsequent Data will be different, as shown in Table 2.

[0060] 表2Map字段定义及Data长度 [0060] Table Definition Data length field 2Map

Figure CN101188589BD00072

[0062] Head第3字节和第4字节为广播信道传输指示信息,其定义参见《移动多媒体广播第1部分:广播信道帧结构、信道编码和调制》。 [0062] Head 3rd byte and 4-byte information indicating a broadcast channel transmission, defined See "Mobile Multimedia Broadcasting Part 1: a broadcast channel frame structure, channel coding and modulation."

[0063] C接口通过SPI的PSYNC信号指示Type字段的位置。 [0063] C Interface Type field position by the PSYNC signal indicative of the SPI. C接口同时通过CLK传送时钟,时钟为系统IOMHz时钟, C interface simultaneously transmitted through the CLK clock, the system clock IOMHz clock,

[0064] 接口时序如图4所示,图4是根据本发明的实施例的形成TS流过程中进行数据转换的时序格式。 [0064] As shown in FIG interface timing, FIG. 4 is a timing data conversion format 4 According to TS stream forming processes of the embodiments of the present invention. [0065] 在本发明中,根据OFDM映射模式,确定对应的单个频点传输数据率、卫星可传输的OFDM频点数; [0065] In the present invention, according to the OFDM mapping mode, determining a single frequency corresponding to the transmission data rate, the satellite may transmit the OFDM frequency points;

[0066] 根据《移动多媒体广播第1部分:广播信道帧结构、信道编码和调制》中的定义,物理层信号1秒钟是一帧,每帧由40个时隙组成。 [0066] The "Mobile Multimedia Broadcasting Part 1: a broadcast channel frame structure, channel coding and modulation" in the definition of the physical layer signal is a 1 second, each frame consisting of 40 slots. 一个时隙是25个ms。 It is a slot 25 ms. OFDM调制方式不同, 25个ms中需要传输的信息bit也不同。 Different OFDM modulation mode, 25 ms in information bit to be transmitted is different. 表2中给出了不同的OFDM调制模式下,一个时隙中需要从接口C中传输的信息字节长度。 Table 2 gives a different OFDM modulation mode, the byte length of a time slot requires information from the interface C is transmitted.

[0067] 卫星的QPSK符号速率为20M,卫星带宽为25. 6M。 QPSK Symbol Rate [0067] satellite is 20M, the bandwidth of the satellite 25. 6M. 卫星信道支持的最高传输速率是40Mbps,每个OFDM频点信号需要卫星信道提供传输的速率如表3中所示。 Satellite channel supports a maximum transmission rate is 40Mbps, each OFDM signal frequency required to provide a satellite transmission rate as shown in Table 3.

[0068] 表3卫星QPSK传输速率 [0068] Table 3 QPSK satellite transmission rate

[0069] [0069]

Figure CN101188589BD00081

[0070] 在本发明中,根据传输模式,确定QPSK传输数据率。 [0070] In the present invention, according to a transmission mode to determine the transmission data rate QPSK. 采用25. 6M的卫星带宽,可以支持的传输模式如表4所示。 25. 6M use of satellite bandwidth can support a transmission mode as shown in Table 4.

[0071] 表4卫星QPSK支持的传输模式 [0071] Table 4 QPSK satellite transmission modes supported

[0072] [0072]

Figure CN101188589BD00082

[0073] 为了能够将C接口中传递的数据,严格按照DVB-S卫星传输标准的定义进行速率匹配和QPSK调制,需要对数据接口的数据格式进行转。 [0073] In order to enable a data transfer interface C, strict rate matching and QPSK modulation according to the definition of the standard DVB-S satellite transmission, the need for transfer of data format interface. 本发明中,TDM调制器还将每一数据段转换成TS流,其中每一数据段转换成一系列的TS包,每一个TS包包括同步字段、传输错误标识字段、时隙标识、传输优先级字段、PID号字段、可变字段、传输加扰控制字段、自适应填充控制字段、连续性指示计数器字段、传输信息字段以及数据载荷字段。 In the present invention, the TDM modulator also be converted into each data segment TS stream, wherein each data segment converted into a series of TS packets, each TS packet comprises a synchronization field, a transmission error identification field, identifying the time slot, the transmission priority field, the PID number field, a variable field, a transport scrambling control field, the control field is filled adaptation, indicating the continuity counter field, information field, and a data transmission payload field. 每一个TS包由188个字节组成,其定义如表5所示: Each TS packet of 188 bytes, which is defined as shown in Table 5:

[0074] 表5TS流打包格式定义 [0074] TABLE flow unpacked format defined 5TS

[0075] [0075]

Figure CN101188589BD00083
Figure CN101188589BD00091

[0076] Sync是TS包的同步指示,其取值为47H或取反B8H。 [0076] Sync synchronized TS packet indicates that the value is 47H or negated B8H. 根据DVB-S标准要求,每8 个TS包中,有一个TS包的Sync是B8H,其余TS包的Sync都为47H。 The DVB-S standard, each of the eight TS packets, a TS packet is B8H Sync, Sync TS packet are the remaining 47H.

[0077] 传输错误标识用于指示当前TS包是否存在传输错误。 [0077] The transmission error current TS packet is used to indicate whether there is a transmission error. 一般情况下,由DVB-S接收机的RS解码电路提供这一bit信息。 Normally, this bit to provide information by the RS decoding circuit DVB-S receiver.

[0078] 时隙标识:当前TS包中的数据载荷,正好与一个时隙的第一个TDM频点信号对齐时,此bit置1。 [0078] The slot identifier: the current TS packet payload data, the signal point just aligned with a first TDM time slot frequency, this bit is set.

[0079] 传输优先级:此bit置1。 [0079] The transmission priorities: This bit is set.

[0080] PID号:标识本TS流的种类,用于同其它TS流进行复用操作。 [0080] PID No.: type identifier of the TS stream, for multiplexing operation with other TS stream.

[0081] 可变字段:根据时间同步字段标识的不同,分别传输表6和表7中的定义的内容。 [0081] The variable field: depending on the time synchronization identifier field, respectively, and the contents of the transmission table 6 Table 7 definition. 当时间同步字段标识为O时,传输表6中定义的内容;当时间同步字段标识为1时,传输表7中定义的内容。 When time synchronization identifier field is O, transmission contents defined in Table 6; field identifies the synchronization when the time is 1, the transmission contents defined in Table 7.

[0082] 传输加扰控制:此2bit置零。 [0082] The transport scrambling control: This 2bit zero.

[0083] 自适应填充控制:此2bit置01,表示没有填充。 [0083] Adaptive filling control: This 2bit counter 01, indicating no padding.

[0084] 连续性指示计数器:递增计数器,指示TS包连续性。 [0084] indicates the continuity counter: the counter is incremented, indicating the TS packet continuity.

[0085] 传输信息字段:¾字节,具体定义如表6所示。 [0085] transmitting information fields: ¾ bytes, specifically defined as shown in Table 6.

[0086] 数据载荷:TS包的数据载荷固定为160字节。 [0086] Data Load: load data TS packet is fixed at 160 bytes. 对于BPSK调制的频点信号,一个时隙中需要传输的信息数据量正好是108个TS包;对于QPSK调制的频点信号,一个时隙中需要传输的信息数据量为216个TS包;对于16QAM的频点信号,一个时隙中需要传输的信息数据量为432个TS包。 For BPSK modulation frequency signal, information data to be transmitted in one slot 108 is just TS packet; for QPSK modulated frequency signal, information data to be transmitted in one time slot TS packet 216; for frequency signal is 16QAM, the information amount of data to be transmitted in a slot 432 TS packets.

[0087] 上述的传输信息字段为MX8比特,其中包含M比特的时间同步信息,所述时间同步信息在每个时隙的第一个频点符号的第一个TS包中插入当前时刻的同步计数器值, 其余TS包中的相应字段保留。 [0087] The transmission of information field bit MX8, which contains M bits, time synchronization information, time synchronization information inserting the current time of the first TS packet in a first frequency symbols per time slot synchronization counter value, the corresponding field reserved remaining TS packet.

[0088] 表6传输信息字段定义 [0088] Table 6 Field Definitions transmitting information

[0089] [0089]

Claims (9)

  1. 1. 一种卫星同步分配网中广播数据的同步适配装置,包括:信源复用器,输出广播业务数据;Stimi激励器,连接到信源复用器,将信源复用器输出的广播业务数据进行信道编码, 信道编码后的符号分为两路输出;OFDM调制器,接收第一路符号并进行OFDM调制后输出;该OFDM信号通过一延时模块后经由Ku波段地面发射机以Ku波段发送给同步轨道卫星,并由卫星将该信号变频到S波段后转发;其特征在于,还包括:TDM调制器,接收第二路符号,基于符号的频点和时隙形成有序的TS流,对TS流进行DVB-S编码,再进行QPSK调制并插入同步序列后输出;该QPSK信号经由Ku波段地面发射机以时分复用TDM的方式发送给同步轨道卫星,并由卫星将QPSK信号直接以Ku波段转发。 Synchronous network adapter device 1. A satellite broadcast data synchronization distribution, comprising: a source multiplexer, the output of the broadcasting service data; Seimei actuator, the source is connected to the multiplexer, the multiplexer output source broadcast channel encoded service data, the channel encoded symbols into two outputs; OFDM modulator receiving the first OFDM-modulated symbol and outputs; OFDM signal after the delay module by a Ku-band via terrestrial transmitters to a Ku-band geosynchronous satellite, the satellite signal by conversion to the S-band transponder; characterized by, further comprising: TDM modulator, receiving a second channel symbols, to form an ordered time slot based on frequency and symbol TS stream, the TS stream DVB-S coding, QPSK modulation, and then insert the synchronization sequence output; the transmitted QPSK signal to a time multiplexed TDM manner via a Ku-band geosynchronous satellite terrestrial transmitters, by the satellite QPSK Ku band signals directly forwarded to.
  2. 2.如权利要求1所述的卫星同步分配网中广播数据的同步适配装置,其特征在于,经信道编码后的第二路符号通过一接口发送给TDM调制器,其中,所述接口码流数据的发放顺序为:首先依次发送第一时隙的第一频点内的所有OFDM点,然后发送第一时隙的第二频点内的所有OFDM点,再发送第一时隙的第三频点内的所有OFDM点,至此完成第一时隙的符号发送,之后发送第二时隙的符号,直至完成所有时隙的符号的发送。 Cable as claimed in claim 1 wherein said interface adapter device code requires a synchronous network broadcast data synchronization distribution, wherein the second path symbols to a channel-coded TDM modulator via an interface, release order for the stream data: first of all successively transmitting a first OFDM frequency points within a first time slot, then all points within the second OFDM frequency transmitting a first slot, the first slot of the retransmission All points within the three OFDM frequency, thereby completing the transmission of the first symbol time slot, the second slot after a transmission symbol, until the completion of transmission of all symbols in a slot.
  3. 3.如权利要求2所述的卫星同步分配网中广播数据的同步适配装置,其特征在于,TDM 调制器将所述每一时隙的每一频点的符号打包成一数据段,所述数据段包括头部字段和内容字段,所述头部字段包括分别指示频点、映射模式、以及信息传输指示的字段;TDM调制器还将每一数据段转换成TS流,其中每一数据段转换成一系列的TS包,每一个所述TS包包括同步字段、传输错误标识字段、时隙标识、传输优先级字段、PID号字段、可变字段、传输加扰控制字段、自适应填充控制字段、连续性指示计数器字段、传输信息字段以及数据载荷字段;所述TS包内码流数据的发放顺序为:首先依次发送第一时隙的第一频点的所有OFDM 符号,然后发送第一时隙的第二频点的所有OFDM符号,再发送第一时隙的第三频点的所有OFDM符号,直至完成第一时隙所有的频点的OFDM符号发送 The satellite as claimed in claim 2, said data synchronization means adapted to broadcast data network synchronization distribution, wherein, the TDM modulator of the frequency of each symbol of each slot packed into a data segment, segment comprises a head field and a content field, the header field comprises an indication frequency, respectively, mapping mode, and a field indicating the information transmission; the TDM modulator also convert each segment into a TS stream, wherein each data segment into a series of TS packets, each of said TS packet includes a synchronization field, a transmission error identification field, a time slot identifier, transport priority field, the PID number field, a variable field, a transport scrambling control field, the control field is filled adaptation, indicating the continuity counter field, information field, and a data transmission payload field; the TS packets in the data stream issuing order: first sequentially transmitted all OFDM symbols of the first slot of a first frequency, a first time slot and then transmits all OFDM symbols of a second frequency, then all OFDM symbols transmitted the first time slot of a third frequency, until the completion of a first OFDM symbol transmission time slot on all the frequency points 再依此顺序进行第二时隙所有频点的所有OFDM符号发送,直至最后一个时隙的所有频点的所有OFDM点发送。 And then make all this order all OFDM symbols transmitted a second time slot frequency until all the frequencies of all point of the last slot of OFDM transmission.
  4. 4.如权利要求3所述的卫星同步分配网中广播数据的同步适配装置,其特征在于,所述传输信息字段为MX8比特,其中包含M比特的时间同步信息,所述时间同步信息在每个时隙的第一个频点符号的第一个TS包中插入当前时刻的同步计数器值,其余TS包中的相应字段保留。 4. A satellite according to claim 3 in a broadcast network synchronization means adapted to synchronize the data distribution, characterized in that the transmission of information field bit MX8, which contains M bits, time synchronization information, the time synchronization information a TS packet of a first frequency symbols per time slot sync counter value into the current time, remaining TS packets corresponding field reserved.
  5. 5.如权利要求4所述的卫星同步分配网中广播数据的同步适配装置,其特征在于,根据OFDM映射模式,确定对应的单个频点传输数据率、卫星可传输的OFDM频点数;其中,BPSK对应单个频点传输数据率为> 8Mbps,卫星可传输的OFDM频点数为3 ;QPSK对应单个频点传输数据率为> 16Mbps,卫星可传输的OFDM频点数为2 ;16QAM对应单个频点传输数据率为> 32Mbps,卫星可传输的OFDM频点数为1 ;根据传输模式,确定QPSK传输数据率;其中,3个BPSK频点传输模式对应的QPSK传输数据率为> 24Mbps ;2个QPSK频点传输模式对应的QPSK传输数据率为> 32Mbps ;1个16QAM频点传输模式对应的QPSK传输数据率为> 32Mbps ;1个BPSK频点,1个QPSK频点传输模式对应的QPSK传输数据率为> 24Mbps ; 2个BPSK频点,1个QPSK频点传输模式对应的QPSK传输数据率为> 32Mbps。 5. The satellite of claim 4, wherein the synchronization means adapted to broadcast data network synchronization distribution, wherein, according to OFDM mapping mode, a single frequency corresponding to the determined transmission data rate, the satellite may transmit the OFDM frequency points; wherein , BPSK single frequency corresponding to the transmission data rate of> 8Mbps, a satellite may transmit the OFDM frequency points is 3; QPSK single frequency corresponding to the transmission data rate> 16Mbps, the satellite may transmit the OFDM frequency points is 2; 16QAM corresponding to a single frequency transmission data rate of> 32Mbps, the satellite may transmit the OFDM frequency points is 1; according to a transmission mode to determine the transmission data rate QPSK; wherein three frequency points BPSK QPSK transmission mode corresponding to the transmission data rate> 24Mbps; 2 QPSK-frequency QPSK transmission mode corresponding to the transmission data rate> 32Mbps; 16QAM a frequency corresponding to the transmission mode QPSK transmission data rate of> 32Mbps; 1 BPSK-frequency, a QPSK transmission mode frequency corresponding to the transmission data rate QPSK > 24Mbps; 2 BPSK-frequency, a frequency point QPSK QPSK transmission mode corresponding to the transmission data rate> 32Mbps.
  6. 6.如权利要求5所述的卫星同步分配网中广播数据的同步适配装置,其特征在于, 所述TDM调制器对TS流进行TS空包插入进行速率匹配,所述TDM调制器包括DVB-S编码器,进行DVB-S编码,包括进行RS (204,188)编码和3/4卷积编码;所述TDM调制器还包括QPSK调制模块,对TS流进行QPSK调制。 6. The satellite of claim 5, wherein the synchronization means adapted to broadcast data network synchronization distribution, wherein the modulator modulates the TDM stream TS TS packet inserting null rate matched, the TDM modulator comprises a DVB -S encoder for encoding DVB-S, including RS (204,188) coding, and 3/4 convolutional encoding; the TDM modulator module further comprises a QPSK modulation, QPSK modulation is performed on the TS stream.
  7. 7.如权利要求6所述的卫星同步分配网中广播数据的同步适配装置,其特征在于, 所述TDM调制器还包括时间同步模块,生成时间标记并加入到TS流的时隙指示TS包中。 7. A satellite according to claim 6 in the synchronization network adapter device synchronized distribution of broadcast data, wherein, the TDM modulator further includes a time synchronization module, and added to generate a time stamp indicating the time slot TS stream TS in the bag.
  8. 8.如权利要求7所述的卫星同步分配网中广播数据的同步适配装置,其特征在于, 所述时间同步模块生成伪随机序列作为同步序列;所述TDM调制器还包括同步信号插入模块,将同步序列插入QPSK信号中,其中I、Q两路信号插入同相的同步序列。 8. A satellite according to claim 7 synchronous network adapter device synchronization distribution of broadcast data, wherein the time synchronization module generates a pseudo-random sequence as a synchronization sequence; the TDM modulator further comprises a sync signal insertion module the synchronization sequence is inserted in a QPSK signal, wherein the I, Q two signals in phase synchronization sequence is inserted.
  9. 9. 一种卫星同步分配网中广播数据的同步适配方法,包括: 通过信源复用器输出广播业务数据;用Stimi激励器将信源复用器输出的广播业务数据进行信道编码,信道编码后的符号分为两路输出;接收第一路符号并进行OFDM调制后输出;该OFDM信号通过一延时模块后经由Ku波段地面发射机以Ku波段发送给同步轨道卫星,并由卫星将该信号变频到S波段后转发;接收第二路符号,基于符号的频点和时隙形成有序的TS流,对TS流进行DVB-S编码, 再进行QPSK调制并插入同步序列后输出;该QPSK信号经由Ku波段地面发射机以时分复用TDM的方式发送给同步轨道卫星,并由卫星将QPSK信号直接以Ku波段转发。 A synchronous satellite distribution network synchronization method adapted to broadcasting data, comprising: outputting a broadcast service data through multiplexer sources; Stimi actuator with the broadcast service data source output from the multiplexer channel coding, channel encoded symbols is divided into two outputs; receiving the first OFDM symbol and the modulated output; the OFDM signal is transmitted through a delay module in the Ku-band to Ku-band geosynchronous satellite via terrestrial transmitters, the satellite by after the signal is forwarded to S band frequency conversion; receiving a second channel symbols form an ordered stream TS based on frequency and time slot symbol of the DVB-S streams TS coding, QPSK modulation, and then insert the synchronization sequence output; the QPSK signal transmitter via a Ku-band TDM time division multiplex manner ground to a geosynchronous satellite by the satellite directly to Ku-band transponders QPSK signal.
CN 200610118367 2006-11-15 2006-11-15 Synchronization adaptation method and device for broadcast data in satellite synchronization distribution network CN101188589B (en)

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WO2004100479A1 (en) 2003-05-05 2004-11-18 Thomson Licensing S.A. Method and apparatus for synchronizing a multi-level modulation signal
CN1612557A (en) 2003-10-27 2005-05-04 直视集团公司 Method and apparatus for providing signal acquisition and frame synchronization in a hierarchical modulation scheme

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Publication number Priority date Publication date Assignee Title
WO2004100479A1 (en) 2003-05-05 2004-11-18 Thomson Licensing S.A. Method and apparatus for synchronizing a multi-level modulation signal
CN1612557A (en) 2003-10-27 2005-05-04 直视集团公司 Method and apparatus for providing signal acquisition and frame synchronization in a hierarchical modulation scheme

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