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1. 发明公开

KR1020000047248A 멀티미디어 위성통신시스템에서 억세스버스트전송방법 및그 장치 无效
标题翻译：在多媒体卫星通信系统中传输接入冲突的方法和装置
公开(公告)号：KR1020000047248A
公开(公告)日：2000-07-25
申请号：KR1019980064041
申请日：1998-12-31
申请人： 주식회사 머큐리 , 한국전자통신연구원
发明人： 최종오 , 조용훈 , 성낙선
IPC分类号： H04B7/185
CPC分类号： H04B7/18513 , H04B7/216
摘要： PURPOSE: A method and an apparatus for transmitting an access burst in the multimedia satellite communication system are provided to transmit an access burst to a central station by using an access CDMA code selected after selectively switching access CDMA codes assigned from the central station. CONSTITUTION: A CDMA channel transmitting unit(47) consists of a CDMA code data storage part(471), a multiplexer(472) and a CDMA modulation part(473). The CDMA code data storage part(471) is composed of a plurality of shift registers(SR10-SRN). The multiplexer(472) outputs the CDMA code data of the CDMA code data storage part(471) selectively according to a control signal supplied from a processor(53). The CDMA modulation part(473) modulates an access burst supplied from a transmitting frame generation part(46) using the CDMA code data provided from the multiplexer(472).
摘要翻译：目的：提供一种用于在多媒体卫星通信系统中发送接入脉冲串的方法和装置，用于通过使用在选择性地切换接入从中心站分配的CDMA代码之后所选择的接入CDMA码向中心站发送接入脉冲串。构成：CDMA信道发送单元（47）由CDMA码数据存储部（471），多路复用器（472）和CDMA调制部（473）构成。 CDMA码数据存储部分（471）由多个移位寄存器（SR10-SRN）组成。复用器（472）根据从处理器（53）提供的控制信号有选择地输出CDMA码数据存储部分（471）的CDMA码数据。 CDMA调制部分（473）使用从复用器（472）提供的CDMA码数据来调制从发送帧生成部分（46）提供的接入脉冲串。

2. 发明公开

KR1020000047243A 멀티미디어 위성통신시스템용 셋톱박스에서의 송신데이터처리방법 无效
标题翻译：用于多媒体卫星通信系统的发送数据的处理方法
公开(公告)号：KR1020000047243A
公开(公告)日：2000-07-25
申请号：KR1019980064036
申请日：1998-12-31
申请人： 주식회사 머큐리 , 한국전자통신연구원
发明人： 최종오 , 신현수 , 조용훈 , 성낙선
IPC分类号： H04L12/28
摘要： PURPOSE: A processing method for transmitting data in a set top box for the multimedia satellite communication system is provided to prevent a system error generated by the transfer speed difference between input data and output data. CONSTITUTION: A memory(461) storing data temporarily stores data inputted in parallel from a processor(53) at a high speed and outputs the stored data to a data frame generation unit(463) in serial. A status storage unit(462) stores information for the data storage states of the memory(461). The data frame generation unit(463), searching the state of the memory(461) periodically, reads stored data in the form of a serial in case that data exist in the memory, generates a required data frame(461) and sends the data frame to a CDMA channel transmitting unit(47) according to a transmitting synchronization signal supplied from a transmitting timing generation unit(50).
摘要翻译：目的：提供一种用于在多媒体卫星通信系统的机顶盒中发送数据的处理方法，以防止由输入数据和输出数据之间的传输速度差产生的系统错误。构成：存储数据的存储器（461）临时存储从处理器（53）以高速并行输入的数据，并将所存储的数据串行输出到数据帧生成单元（463）。状态存储单元（462）存储用于存储器（461）的数据存储状态的信息。数据帧生成单元（463）周期性地搜索存储器（461）的状态，在存储器中存在数据的情况下以串行的形式读取存储的数据，生成所需数据帧（461）并发送数据根据从发送定时生成单元（50）提供的发送同步信号，向CDMA信道发送单元（47）发送帧。

3. 发明公开

KR1020000047241A 멀티미디어 위성통신시스템에서의 억세스프레임 생성방법 및그 장치 无效
标题翻译：用于在多媒体卫星通信系统中生成接入帧的方法
公开(公告)号：KR1020000047241A
公开(公告)日：2000-07-25
申请号：KR1019980064034
申请日：1998-12-31
申请人： 주식회사 머큐리 , 한국전자통신연구원
发明人： 최종오 , 김원호 , 안재영
IPC分类号： H04B7/14
CPC分类号： H04B7/18526 , H04H20/51 , H04H40/90
摘要： PURPOSE: A method for generating access frames in the multimedia satellite communication system is provided to generate access frames by inserting the length of preamble data variably. CONSTITUTION: An RF unit(31) executes frequency down conversion for high frequency signals transmitted from a central station(1) and frequency up conversion for the intermediate frequency signals output from an intermediate frequency generation unit(39). A tuner(32) converts the high frequency signals output from the RF unit(31) into intermediate frequency signals. A demodulation unit(33) demodulates the intermediate frequency signals of the tuner(32). A demultiplexer(34) extracts a TS packet from the TS packet data output from the demodulation unit(33). A network interface card(35) executes interfacing with a personal computer(5). A transmitting frame generation unit(36) generates and outputs serial transmitting access frames. A CDMA channel transmitting unit(37) executes CDMA modulation, mixing CDMA codes supplied from a processor(43). A modulation unit(38) carries out QPSK modulation for the data output from the CDMA channel transmitting unit(37). The intermediate frequency generation unit(39) modulates the modulation signals output from the modulation unit(38) into intermediate frequency signals.
摘要翻译：目的：提供一种在多媒体卫星通信系统中产生接入帧的方法，通过可变地插入前导码数据的长度来产生接入帧。构成：RF单元（31）对从中心站（1）发送的高频信号和从中频生成单元（39）输出的中频信号进行升频转换，执行降频转换。调谐器（32）将从RF单元（31）输出的高频信号转换为中频信号。解调单元（33）对调谐器（32）的中频信号进行解调。解复用器（34）从从解调单元（33）输出的TS分组数据中提取TS分组。网络接口卡（35）执行与个人计算机（5）的接口。发送帧生成部（36）生成并输出串行发送接收帧。 CDMA信道发送单元（37）执行CDMA调制，混合从处理器（43）提供的CDMA码。调制单元（38）对从CDMA信道发送单元（37）输出的数据进行QPSK调制。中频生成单元（39）将从调制单元（38）输出的调制信号调制成中频信号。

4. 发明公开

KR1020000047245A 멀티미디어위성통신시스템의셋톱박스에서송신타이밍동기 无效
标题翻译：多媒体卫星通信系统设置顶盒中传输时序同步信号的生成方法
公开(公告)号：KR1020000047245A
公开(公告)日：2000-07-25
申请号：KR1019980064038
申请日：1998-12-31
申请人： 주식회사 머큐리 , 한국전자통신연구원
发明人： 최종오 , 신현수 , 안재영 , 이성팔
IPC分类号： H04B7/15
CPC分类号： H04N21/4305 , H04N7/20 , H04W84/06
摘要： PURPOSE: A generating method of transmission timing synchronous signals in set top box of multimedia satellite communication system is provided to easily match the data transmission time between respective set top box. CONSTITUTION: A generating method of transmission timing synchronous signals in set top box of multimedia satellite communication system comprises: an offset calculation step calculating offsets on the basis of PCR/OPCR data received from a central station; an offset comparison step comparing the offsets calculated in the offset calculation step with a previous offset; an offset storing step updating the calculated offsets if a current offset and the previous offset are different; a transmission timing synchronous value generating step generating a transmission timing synchronous value on the basis of the offset updated in the offset storing step; and a transmission timing generating step generating a transmission timing on the basis of the value generated in the transmission timing synchronous value generating step.
摘要翻译：目的：提供多媒体卫星通信系统机顶盒中发送定时同步信号的生成方法，以便于各机顶盒之间的数据传输时间匹配。构成：多媒体卫星通信系统的机顶盒中的发送定时同步信号的产生方法包括：基于从中心站接收的PCR / OPCR数据计算偏移量的偏移计算步骤; 偏移比较步骤，将在偏移计算步骤中计算的偏移与先前偏移进行比较; 偏移存储步骤，如果当前偏移和前一偏移量不同，则更新所计算的偏移量; 发送定时同步值生成步骤，基于在所述偏移存储步骤中更新的偏移量，生成发送定时同步值; 以及发送定时生成步骤，基于在发送定时同步值生成步骤中生成的值，生成发送定时。

5. 发明公开

KR1020000047183A 위상고정루프 락검출방법 및 그 장치 无效
标题翻译：锁相环锁定检测装置及其方法
公开(公告)号：KR1020000047183A
公开(公告)日：2000-07-25
申请号：KR1019980063976
申请日：1998-12-31
申请人： 주식회사 머큐리
发明人： 김대현 , 최종오
IPC分类号： H03L7/00
摘要： PURPOSE: A lock detect apparatus for a phase lock loop and method therefor are provided to prevent efficiency deterioration due to erroneous lock detect of a phase lock loop by determining whether lock of a phase lock loop is detected under unstable condition and setting a point of time when lock of the phase lock loop is continuously detected as a lock condition of the phase lock loop. CONSTITUTION: Method for detecting a lock signal of a phase lock loop comprises the steps of: detecting lock condition based on output level of a phase lock loop (20); storing information of the condition according to the result of lock detect; counting a crossing cycle of the un-lock and the lock condition; and setting a lock condition of the phase lock loop when calculation in lock condition before and calculation in lock condition at present are identical after confirming a calculation by means of the lock detect means during the lock storage.
摘要翻译：目的：提供一种用于锁相环的锁定检测装置及其方法，用于通过确定在不稳定状态下是否检测到锁相环是否被锁定并设定时间点来防止由于锁相环的错误锁定检测而导致的效率劣化当锁相环锁定被连续检测为锁相环的锁定状态时。构成：检测锁相环的锁定信号的方法包括以下步骤：基于锁相环（20）的输出电平检测锁定状态; 根据锁定检测结果存储条件的信息; 计数非锁定和锁定条件的交叉循环; 并且当在锁定状态之前的计算和目前的锁定状态下的计算处于相同状态时，在锁定存储期间通过锁定检测装置确认计算之后，设置锁相环的锁定状态。

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