会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 8. 发明公开
    • 다중 안테나 OFDM 송, 수신 방법 및 송, 수신기
    • OFDM发射的方法,使用多个天线和发射机的接收机,其接收机
    • KR1020110095090A
    • 2011-08-24
    • KR1020100034843
    • 2010-04-15
    • 한국전자통신연구원경희대학교 산학협력단
    • 황성현김윤희왕진수박재철
    • H04J11/00H04B7/04
    • H04L27/2614H04L1/0625H04L27/2628H04L27/2649
    • PURPOSE: A method for transmitting and receiving data for the OFDM(Orthogonal Frequency Division Multiplexing) of multiple antenna and an apparatus thereof are provided to reduce the number and the complexity of IFFT(Inverse Fast Fourier Transform), when IFFT wholly is operated, by performing IFFT at each subgroup. CONSTITUTION: A subgroup generating unit(230) divides data symbols into a plurality of subgroups at a frequency domain. An IFFT performing unit(240) individually proceeds IFFT in a plurality of the subgroups to generate partial signals at a time domain which corresponds to a plurality of the subgroups. An OFDM(Orthogonal Frequency Division Multiplexing) signal candidate generation unit(250) generates at least two OFDM signal candidates using the combination of partial signals to transmit each partial signal to one of a plurality of transmission antennas. A selecting unit(260) selects at least one of two OFDM signal candidates.
    • 目的:提供一种用于发送和接收多天线的OFDM(正交频分复用)数据的方法及其装置,以在IFFT完全运行时减少IFFT(快速傅里叶逆变换)的数量和复杂度,通过 在每个子组执行IFFT。 构成:子组生成单元(230)将数据符号划分成频域的多个子组。 IFFT执行单元(240)单独地在多个子组中进行IFFT,以在对应于多个子组的时域生成部分信号。 OFDM(正交频分复用)信号候补生成单元(250)使用部分信号的组合生成至少两个OFDM信号候选,以将每个部分信号发送到多个发送天线之一。 选择单元(260)选择两个OFDM信号候选中的至少一个。
    • 10. 发明公开
    • 무선통신시스템에서의 피드백 전송 및 적응 전송 방법
    • 无线电通信系统中的反馈传输和自适应传输方法
    • KR1020090054694A
    • 2009-06-01
    • KR1020070121504
    • 2007-11-27
    • 한국전자통신연구원경희대학교 산학협력단
    • 김윤희심성보양동화엄중선황성현김창주송명선
    • H04L1/16H04L1/12H04L27/26
    • H04L1/16H04L1/0026H04L27/2602H04L27/2626
    • A method for feedback transmission and adaptive transmission in a wireless communication system is provided to improve data transmission efficiency by supporting a band-AMC mode and a diversity mode in time division or frequency division at the same time. A user terminal extracts the channel quality information from a receiving signal and selects a sub band to perform the feedback of the channel quality information(S10). The user terminal feeds back the channel quality information to a base station according to the selection of the sub band(S20). The base station determines the existence of the sub band channel quality information and detects the channel quality information(S30). The base station transmits an adaptive transmission waveform according to the transmission mode by determining the transmission mode by the channel quality information which is fed back(S50). The user terminal receives the adaptive transmission waveform transmitted from the base station and recovers the received waveform according to the determined transmission mode(S60).
    • 提供了一种用于在无线通信系统中进行反馈传输和自适应传输的方法,以通过同时支持频段AMC模式和分集或分频的分集模式来提高数据传输效率。 用户终端从接收信号中提取信道质量信息,并选择子带来执行信道质量信息的反馈(S10)。 用户终端根据子带的选择将信道质量信息反馈给基站(S20)。 基站确定子带信道质量信息的存在并检测信道质量信息(S30)。 基站通过反馈的信道质量信息确定发送模式,根据发送模式发送自适应发送波形(S50)。 用户终端接收从基站发送的自适应发送波形,并根据确定的发送模式恢复接收到的波形(S60)。