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    • 6. 发明授权
    • Apparatus and method for transmitting data in multi-input multi-output system
    • 用于在多输入多输出系统中传输数据的装置和方法
    • US07738843B2
    • 2010-06-15
    • US11739175
    • 2007-04-24
    • Tae Joon KimIk Soo EoHyoun Kuk KimHyun Chul Park
    • Tae Joon KimIk Soo EoHyoun Kuk KimHyun Chul Park
    • H04B1/02H04B1/04H01Q11/12H04M1/00
    • H04W52/42
    • Provided is a transmitter for a multi-input multi-output system including: a memory for storing a modulation system and power allocation coefficient for each antenna; a modulating unit for modulating data to be transmitted using the modulation system for each antenna stored in the memory when the data to be transmitted is input; and a power adjusting unit for adjusting the power according to the power allocation coefficient for each antenna stored in the memory to transmit the data to be transmitted, modulated at the modulating unit, via a corresponding antenna. A higher performance gain can be provided compared to a conventional open loop V-BLAST system by using a different modulation system and power for each antenna of a transmitter.
    • 提供一种用于多输入多输出系统的发射机,包括:存储器,用于存储每个天线的调制系统和功率分配系数; 调制单元,用于当输入要发送的数据时,使用存储在存储器中的每个天线的调制系统调制要发送的数据; 以及功率调整单元,用于根据存储在存储器中的每个天线的功率分配系数来调整功率,以经由相应的天线发送在调制单元调制的要发送的数据。 与传统的开环V-BLAST系统相比,通过使用不同的调制系统和发射机的每个天线的功率,可以提供更高的性能增益。
    • 8. 发明授权
    • Blind channel estimation in an orthogonal frequency division multiplexing system
    • 正交频分复用系统盲信道估计
    • US07929620B2
    • 2011-04-19
    • US11634276
    • 2006-12-05
    • Tae Joon KimIk Soo EoHee Bum Jung
    • Tae Joon KimIk Soo EoHee Bum Jung
    • H04L27/28H04J11/00
    • H04L25/0238H04L25/0212H04L25/0248
    • A method for stable channel estimation to increase frequency band efficiency that is lost by using a pilot, and to reduce the complexity and the sensitivity to channel zero. The method includes generating an i-th symbol block Si including N carriers, performing an inverse fast Fourier transform (IFFT) operation on the i-th symbol block, and forming an orthogonal frequency division multiplexing (OFDM) symbol block. The method also includes attaching a guard interval sample in front of the i-th OFDM symbol block Ui and forming at least one OFDM symbol block Ui,cp. The method further includes modeling the formed OFDM symbol block Ui,cp with a channel finite impulse response (FIR) filter and estimating channel impulse response using signals yi received through a channel.
    • 一种用于稳定信道估计的方法,以增加使用导频丢失的频带效率,并降低对信道零的复杂度和灵敏度。 该方法包括生成包括N个载波的第i个符号块Si,对第i个符号块执行快速傅里叶逆变换(IFFT),并形成正交频分复用(OFDM)符号块。 该方法还包括在第i个OFDM符号块Ui的前面附加保护间隔样本并形成至少一个OFDM符号块U 1,c p。 该方法还包括使用信道有限脉冲响应(FIR)滤波器对形成的OFDM符号块Ui,cp进行建模,并且使用通过信道接收的信号y i来估计信道脉冲响应。
    • 9. 发明授权
    • Multi-input multi-output system and method for demodulating a transmitting vector in a receiver of the system
    • 用于解调系统的接收机中的发射矢量的多输入多输出系统和方法
    • US07787555B2
    • 2010-08-31
    • US11739209
    • 2007-04-24
    • Tae Joon KimIk Soo EoHyoun Kuk KimHyun Cheol Park
    • Tae Joon KimIk Soo EoHyoun Kuk KimHyun Cheol Park
    • H04K1/10H04L27/28H04L1/02H04B7/02H04B7/08
    • H04B7/0434
    • Provided is a receiver of a multi-input multi-output system using multiple antennas, the receiver including: a first multiplying unit for multiplying a vector r received via the antenna by a Hermitian matrix Q; a candidate transmitting vector generating unit for detecting a signal on a lowest modulation order transmitting antenna from the received vector y output from the first multiplying unit, creating as many symbol candidates as the modulation order of the detected signal, and generating a candidate transmitting vector using each symbol candidate; a transmitting vector determining unit for obtaining a distance between each candidate transmitting vector generated by the candidate transmitting vector generating unit and the received vector y to determine a final transmitting vector; and a demodulating unit for demodulating the final transmitting vector determined by the transmitting vector determining unit. Since the receiver detects a transmitting vector with reference to a signal on a lowest modulation order transmitting antenna, the receiver can have a simpler structure.
    • 提供了一种使用多个天线的多输入多输出系统的接收机,所述接收机包括:第一乘法单元,用于将通过所述天线接收的矢量r乘以Hermitian矩阵Q; 候选发射矢量产生单元,用于从从第一乘法单元输出的接收矢量y中检测最低调制阶发射天线上的信号,创建与检测信号的调制阶数一样多的符号候选,并使用 每个符号候选人; 发送矢量确定单元,用于获得由候选发射矢量生成单元生成的每个候选发射矢量与接收矢量y之间的距离,以确定最终发射矢量; 以及解调单元,用于解调由发送矢量确定单元确定的最终发送矢量。 由于接收机参考最低调制阶发射天线上的信号检测发射矢量,所以接收机可以具有更简单的结构。