公开(公告)号：KR1020000047250A

公开(公告)日：2000-07-25

申请号：KR1019980064043

申请日：1998-12-31

Applicant: 주식회사 머큐리 ,  한국전자통신연구원

Inventor： 김선희 ,  최훈 ,  김환철 ,  이성팔

IPC: H04B7/185

CPC classification number: H04W72/0453 ,  H04B7/18528 ,  H04B7/18539 ,  H04W28/0289 ,  H04W84/06

Abstract: PURPOSE: An access channel allotment method in satellite communication system is provided to measure the load of a set access channel and automatically reset an available traffic channel as the access channel in accordance with the load. CONSTITUTION: An access channel allotment method in satellite communication system comprises: a re-transmission times storing step storing re-transmission times in every set access channel; a re-transmission times identifying step identifying whether the re-transmission times of respective access channel is over a predetermined value in the re-transmission times storing step; an idle code searching step searching idle data of code data to be allotted as channel frequency allotted to the access channel if the re-transmission times is over the predetermined value; and an access channel re-allotment step re-allotting the code data searched in the idle code searching step to the access channel.

Abstract translation: 目的：提供卫星通信系统中的接入信道分配方法，以测量设置的接入信道的负载，并根据负载自动重新设置接入信道的可用业务信道。 构成：卫星通信系统中的接入信道分配方法包括：在每一组接入信道中存储重发次数的重发次数存储步骤; 在所述再发送时间存储步骤中识别所述各个接入信道的再发送时间是否超过规定值的再发送时刻识别步骤; 空闲码搜索步骤，如果所述重发时间超过所述预定值，则搜索要被分配为被分配给所述接入信道的频道频率的码数据的空闲数据; 以及接入信道重新分配步骤，将在所述空闲码搜索步骤中搜索的码数据重新分配给所述接入信道。

公开(公告)号：KR1020000047245A

公开(公告)日：2000-07-25

申请号：KR1019980064038

申请日：1998-12-31

Applicant: 주식회사 머큐리 ,  한국전자통신연구원

Inventor： 최종오 ,  신현수 ,  안재영 ,  이성팔

IPC: H04B7/15

CPC classification number: H04N21/4305 ,  H04N7/20 ,  H04W84/06

Abstract: 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.

Abstract translation: 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。

公开(公告)号：KR1020000047244A

公开(公告)日：2000-07-25

申请号：KR1019980064037

申请日：1998-12-31

Applicant: 주식회사 머큐리 ,  한국전자통신연구원

Inventor： 강현곤 ,  김선희 ,  김원호 ,  이성팔

IPC: H04L12/28

Abstract: PURPOSE: An automatic channel selection apparatus in the multimedia satellite communication system is provided to automatically select a channel frequency for a return link which transmits data from a set top box to a central station. CONSTITUTION: An automatic channel selection apparatus(50) is comprised of a frequency down converter(51), a signal distributor(52), a frequency synthesizer(53), a channel selection processor(54) and a data storage unit(55). The frequency down converter(51) converts an intermediate frequency signal of 70 megahertz into a low intermediate frequency signal. The signal distributor(52) outputs inputted signals to a plurality of CDMA receiving unit. The frequency synthesizer(53) supplies a specific frequency signal to the frequency down converter(51) according to a required control signal. The channel selection processor(54) controls the whole operation of the automatic channel selection apparatus(50), based on a control signal supplied from a received data processing unit(26). The data storage unit(55) stores channel frequency information provided from the received data processing unit(26).

Abstract translation: 目的：提供多媒体卫星通信系统中的自动频道选择装置，用于自动选择一个从机顶盒向中心台发送数据的返回链路的频道。 构成：自动频道选择装置（50）包括降频转换器（51），信号分配器（52），频率合成器（53），频道选择处理器（54）和数据存储单元（55） 。 降频转换器（51）将70兆赫兹的中频信号转换成低中频信号。 信号分配器（52）将输入的信号输出到多个CDMA接收单元。 频率合成器（53）根据所需的控制信号向降频转换器（51）提供特定的频率信号。 频道选择处理器（54）基于从接收数据处理单元（26）提供的控制信号来控制自动频道选择设备（50）的整体操作。 数据存储单元（55）存储从接收数据处理单元（26）提供的通道频率信息。

公开(公告)号：KR1020000014912A

公开(公告)日：2000-03-15

申请号：KR1019980034557

申请日：1998-08-26

Applicant: 한국전자통신연구원

Inventor： 김명섭 ,  송윤정 ,  이성팔 ,  채종석

IPC: H04L1/00

CPC classification number: H04L27/0014 ,  H04L2027/003 ,  H04L2027/0055

Abstract: PURPOSE: A device for recovering decision-directed carrier wave is provided to swiftly recover phase and frequency of carrier wave, by processing a baseband signal in a complex domain. CONSTITUTION: A device for recovering carrier wave of a signal inputted from outside comprises: a first conjugate complex number generating section(110) for outputting the first conjugate complex number, after receiving the complex number; a frequency recovering section(120) for recovering carrier frequency of the inputted signal, by compensating carrier wave frequency offset inputted from outside, after receiving the first conjugate complex number; a recovering section(130) for recovering carrier wave phase of a signal, which the frequency is recovered by a frequency recovering device, by compensating the phase offset outputted from the frequency recovering device, after receiving the first conjugate complex number; a complex number deciding section(130) for deciding a predetermined complex number, fit for the output value of the phase recovering device, and outputting the decided predetermined complex number to the conjugate complex number generating section(110).

Abstract translation: 目的：提供一种用于恢复决策载波的设备，通过处理复杂域中的基带信号，快速恢复载波的相位和频率。 构成：用于恢复从外部输入的信号的载波的装置包括：在接收到复数之后，输出第一共轭复数的第一共轭复数产生部分（110） 频率恢复部（120），用于通过在接收到第一共轭复数之后补偿从外部输入的载波频率偏移来恢复输入信号的载波频率; 恢复部分，用于在接收到第一共轭复数之后，通过补偿从频率恢复装置输出的相位偏移来恢复频率由频率恢复装置恢复的信号的载波相位; 用于确定预定复数的复数确定部分（130），适合相位恢复装置的输出值，并将所确定的预定复数输出到共轭复数产生部分（110）。