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    • 33. 发明授权
    • Receiver and receiving method for scalable bandwith
    • 用于可扩展带宽的接收和接收方法
    • US08340219B2
    • 2012-12-25
    • US12445234
    • 2007-10-10
    • Moon-Sik LeeNam-Il KimHyeong-Geun ParkIl-Gyu KimYoung-Hoon KimSeung-Chan Bang
    • Moon-Sik LeeNam-Il KimHyeong-Geun ParkIl-Gyu KimYoung-Hoon KimSeung-Chan Bang
    • H04L27/00
    • H04W72/0406H04B1/30H04B1/406
    • Provided are a receiver and a receiving method for a scalable bandwidth in a mobile station of an Orthogonal Frequency Division Multiplexing (OFDM) system. The receiving method includes the steps of: (a) filtering a received RF signal; (b) oscillating a frequency according to a center frequency control signal to output a local oscillation frequency; (c) down-converting the filtered RF signal by using the local oscillation frequency; (d) scalable-filtering the down-converted signal while adjusting a bandwidth according to a bandwidth control signal; (e) controlling gain of the scalable-filtered signal; (f) converting the gain-controlled analog signal into a digital signal by using a sampling frequency matching with a corresponding bandwidth according to an ADC control signal; and (g) demodulating the converted digital signal, outputting the center frequency control signal, the bandwidth control signal, and the ADC control signal according to control information received from an upper layer.
    • 提供了一种用于正交频分复用(OFDM)系统的移动台中的可扩展带宽的接收机和接收方法。 接收方法包括以下步骤:(a)对接收到的RF信号进行滤波; (b)根据中心频率控制信号振荡频率以输出本地振荡频率; (c)使用本地振荡频率对滤波的RF信号进行下变频; (d)在根据带宽控制信号调整带宽的同时可缩放滤波下变频信号; (e)控制所述可缩放滤波信号的增益; (f)通过使用根据ADC控制信号的与相应带宽匹配的采样频率将增益控制模拟信号转换成数字信号; 和(g)根据从上层接收到的控制信息解调转换的数字信号,输出中心频率控制信号,带宽控制信号和ADC控制信号。
    • 40. 发明授权
    • Method and apparatus for transmitting by using transmit diversity at DFT spread OFDMA
    • 通过使用DFT扩展OFDMA的发送分集进行发送的方法和装置
    • US08369300B2
    • 2013-02-05
    • US12094238
    • 2006-11-17
    • Il-Gyu KimHyeong-Geun ParkKap-Seok ChangYoung-Hoon KimSeung-Chan BangEun-Jeong ShinHye-Kyung JwaMoon-sik Lee
    • Il-Gyu KimHyeong-Geun ParkKap-Seok ChangYoung-Hoon KimSeung-Chan BangEun-Jeong ShinHye-Kyung JwaMoon-sik Lee
    • H04B7/208
    • H04B7/061H04L1/06H04L1/1893H04L5/0023H04L5/0044
    • The present invention relates to a packet data transmission method in an OFDMA system and an apparatus thereof. The present invention provides a user packet data transmission method including generating a RACH burst for channel information estimation, selecting a first antenna among a plurality of antennas, transmitting the RACH burst through the first antenna to a base station, receiving a data transmission acceptance signal from the base station, in response to the RACH burst, transmitting user packet data through the first antenna when receiving a signal indicating that the data transmission is allowed, and selecting a second antenna that is difference from the first antenna and transmitting a RACH burst through the second antenna when receiving a signal indicating that the data transmission is not allowed, and a transmitting apparatus of a mobile station having the plurality of antennas. According to the present invention, the RACH burst and user packet data are transmitted by using a mobile station having a plurality of antennas in an LTE-applied OFDMA system, and therefore data transmission can be performed with a wide bandwidth and high data rate and a deep fading period that may occur during the data transmission can be reduced, thereby preventing call dropping and improving data transmission performance.
    • 本发明涉及OFDMA系统中的分组数据传输方法及其装置。 本发明提供了一种用户分组数据传输方法,包括:生成用于信道信息估计的RACH脉冲串,选择多个天线中的第一天线,通过第一天线发送RACH脉冲串到基站;从基站接收数据传输接收信号; 所述基站响应于所述RACH突发,当接收到指示允许所述数据传输的信号时,通过所述第一天线发送用户分组数据,并且选择与所述第一天线不同并且通过所述第一天线发送RACH突发的第二天线 在接收到指示不允许数据传输的信号的第二天线以及具有多个天线的移动台的发送装置。 根据本发明,通过在LTE应用的OFDMA系统中使用具有多个天线的移动台来发送RACH突发和用户分组数据,因此可以以宽带宽和高数据速率进行数据传输,并且 可以减少在数据传输期间可能发生的深度衰落周期,从而防止呼叫丢弃并提高数据传输性能。