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    • 6. 发明申请
    • APPARATUS AND METHOD OF TRANSMITTING AND RECEIVING RECEPTION ACKNOWLEDGMENT SIGNAL IN MOBILE COMMUNICATION SYSTEM
    • 移动通信系统中发送和接收接收确认信号的装置和方法
    • WO2008069574A1
    • 2008-06-12
    • PCT/KR2007/006285
    • 2007-12-05
    • ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTELEE, HeesooCHUNG, Hyun-Kyu
    • LEE, HeesooCHUNG, Hyun-Kyu
    • H04L1/16
    • H04L1/1607H04L1/20
    • Provided are apparatus and method of transmitting and receiving a reception acknowledgment signal in a mobile communication system. The apparatus and method of receiving the reception acknowledgment signal includes respectively calculating a probability that the received reception acknowledgment signal is a reception success signal and a probability that the reception acknowledgment signal is a reception failure signal, by using an estimated packet error rate predicted based on a pre-set required packet error rate and determining whether the reception acknowledgment signal is the reception success signal or the reception failure signal. The apparatus and method of transmitting a reception acknowledgment signal includes determining transmission powers of a reception success signal and a reception failure signal in order to maximize a difference between a first complex signal and a second complex signal, the first complex signal being modulated for the reception success and the second complex signal being modulated for the reception failure, based on the average transmission power and a pre-set required packet error rate. The apparatus and method of transmitting reception acknowledgment signals transmits a single packet indicating reception successes or failures for a plurality of received data packets by using variable length coding based on a pre-set required packet error rate. According to the present invention, non-uniformity of frequency between the reception success signal and the reception failure signal is considered to increase correct reception rate of the reception acknowledgment signal.
    • 提供了一种在移动通信系统中发送和接收接收确认信号的装置和方法。 接收接收确认信号的装置和方法包括:通过使用基于以下的预测的估计分组错误率,分别计算接收到的接收确认信号是接收成功信号的概率和接收确认信号是接收失败信号的概率 预设所需的分组错误率,并确定接收确认信号是接收成功信号还是接收失败信号。 发送接收确认信号的装置和方法包括确定接收成功信号和接收失败信号的发送功率,以便最大化第一复信号和第二复信号之间的差异,第一复信号被调制用于接收 基于平均发送功率和预设的所需分组错误率,成功和第二复合信号被调制用于接收失败。 发送接收确认信号的装置和方法通过使用基于预设所需分组错误率的可变长度编码来发送指示多个接收数据分组的接收成功或失败的单个分组。 根据本发明,认为接收成功信号与接收失败信号之间的频率不一致会增加接收确认信号的正确接收速率。
    • 7. 发明申请
    • APPARATUS AND METHOD FOR CHANNEL ESTIMATION AND SYNCHRONIZATION IN OFDM/OFDMA RELAY SYSTEM
    • OFDM / OFDMA继电器系统中信道估计和同步的装置和方法
    • WO2008069555A1
    • 2008-06-12
    • PCT/KR2007/006258
    • 2007-12-04
    • ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTECHUNG-ANG UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATIONLEE, HyojinCHUNG, Hyun-KyuCHO, Yong-SooWOO, Kyung-SooYOO, Hyun-IlLEE, Heesoo
    • LEE, HyojinCHUNG, Hyun-KyuCHO, Yong-SooWOO, Kyung-SooYOO, Hyun-IlLEE, Heesoo
    • H04J11/00
    • H04L25/0232H04L5/0023H04L5/0032H04L5/0048H04L25/0226H04L27/2657H04L27/2662
    • Provided are an apparatus and method for channel estimation and synchronization in an orthogonal frequency division multiplexing (OFDM)/ orthogonal frequency division multiplexing access (OFDMA) relay system. When data is received through a relay, channel estimation performance deterioration due to propagation delay can be improved in a transparent relay system or a cooperative relay system by extracting pilot signals based on a signal received from transmitters to a mobile station, estimating propagation delay between each of the transmitters, that transmitted the extracted pilot signals, and the mobile station based on the extracted pilot signals and preset reference pilot signals, and estimating a channel between the corresponding transmitter and the mobile station by estimating propagation delay weight of the corresponding transmitter based on the estimated propagation delay. Also, effects of a carrier frequency offset and timing offset of a link between the corresponding transmitter and the mobile station can be removed by storing the existing carrier frequency offset and timing offset of each transmitter, when the mobile station receives a signal, identifying a transmitter that transmitted the signal, and compensating the signal by using the stored carrier frequency offset and timing offset of the identified transmitter.
    • 提供了一种在正交频分复用(OFDM)/正交频分复用接入(OFDMA)中继系统中的信道估计和同步的装置和方法。 当通过继电器接收数据时,通过基于从发射机接收的信号向移动台提取导频信号,可以在透明中继系统或协作中继系统中改善由于传播延迟引起的信道估计性能恶化,估计每个 基于所提取的导频信号和预置的参考导频信号来发送所提取的导频信号的发射机和移动台,以及基于相应的发射机的传播延迟权重估计相应的发射机与移动台之间的信道,基于 估计的传播延迟。 此外,当移动站接收到信号,识别发射机时,可以通过存储每个发射机的现有载波频率偏移和定时偏移来消除对应的发射机和移动台之间的链路的载波频率偏移和定时偏移的影响 发送信号,并通过使用所存储的载波频率偏移和所识别的发射机的定时偏移来补偿信号。