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    • 11. 发明申请
    • Gain control method and apparatus in receiver of wireless communication system
    • 无线通信系统接收机增益控制方法及装置
    • US20070287400A1
    • 2007-12-13
    • US11729965
    • 2007-03-29
    • Hyun-Seok YuHung-Su ParkHyun-Seok Oh
    • Hyun-Seok YuHung-Su ParkHyun-Seok Oh
    • H04B1/06
    • H03G3/3068
    • Provided is a method and apparatus for controlling a gain of a receiver in a wireless communication system. The method of controlling a gain of a received signal in a receiver using a Low Noise Amplifier (LNA) and a Variable Gain Amplifier (VGA) includes respectively generating first gain control signals for the LNA and the VGA based on a signal received via an antenna and digitized by the LNA and the VGA, measuring a power detection value from power of a low-noise-amplified signal by the LNA, determining offsets for controlling increase and decrease of the first gain control signals based on the power detection value of the LNA output, and respectively providing second gain control signals obtained by adding the offsets to the first gain control signals to the LNA and the VGA.
    • 提供了一种用于控制无线通信系统中的接收机的增益的方法和装置。 使用低噪声放大器(LNA)和可变增益放大器(VGA)在接收机中控制接收信号的增益的方法包括基于经由天线接收的信号分别产生用于LNA和VGA的第一增益控制信号 并由LNA和VGA进行数字化,通过LNA从低噪声放大信号的功率测量功率检测值,根据LNA的功率检测值确定用于控制第一增益控制信号的增减的偏移量 并且分别提供通过将第一增益控制信号的偏移量加到LNA和VGA而获得的第二增益控制信号。
    • 13. 发明授权
    • Apparatus and method for optimally compensating for imbalance between in-phase and quadrature-phase in a zero-IF OFDM receiver
    • 用于最佳地补偿零中频OFDM接收机中的同相和正交相位之间的不平衡的装置和方法
    • US07609772B2
    • 2009-10-27
    • US11148179
    • 2005-06-09
    • Hyun-Seok YuHyun-Seok OhJi-Won HaMin-Goo Kim
    • Hyun-Seok YuHyun-Seok OhJi-Won HaMin-Goo Kim
    • H04L27/28
    • H04L27/2649H04L25/061H04L2027/0016
    • An optimum I/Q imbalance compensating apparatus and method in a zero-IF OFDM receiver. In the apparatus, a first compensator generates a first symbol by removing interference from a second distorted symbol on an (Ns−m+1)th subcarrier from a first distorted symbol on an mth subcarrier by a first compensation coefficient in an OFDM FFT signal of Ns subcarriers. A first hard decider generates a first compensated symbol by hard-decision on the first symbol, an error calculator generates an error symbol by subtracting the first received symbol from the first compensated symbol. A second compensator generates a second symbol by eliminating interference from the first distorted symbol from the second distorted symbol using a second compensation coefficient. A second hard decider generates a second compensated symbol by hard-decision on the second symbol, and an adaptive controller updates the first compensation coefficient using the error symbol and the second compensation symbol.
    • 零中频OFDM接收机中的最佳I / Q不平衡补偿装置和方法。 在该装置中,第一补偿器通过在第(Ns-m + 1)个子载波上从第N个副载波上的第一失真符号中的第二失真符号除去干扰,产生第一符号,第一补偿系数在OFDM FFT信号中的第一补偿系数 Ns副载波。 第一硬判决器通过对第一符号进行硬判决来生成第一补偿符号,误差计算器通过从第一补偿符号减去第一接收符号来生成误差符号。 第二补偿器通过使用第二补偿系数消除来自第二失真符号的来自第一失真符号的干扰来产生第二符号。 第二硬判定器通过第二符号上的硬判决产生第二补偿符号,并且自适应控制器使用误差符号和第二补偿符号来更新第一补偿系数。
    • 16. 发明申请
    • Apparatus and method for optimally compensating for imbalance between in-phase and quadrature-phase in a zero-IF OFDM receiver
    • 用于最佳地补偿零中频OFDM接收机中的同相和正交相位之间的不平衡的装置和方法
    • US20060182189A1
    • 2006-08-17
    • US11148179
    • 2005-06-09
    • Hyun-Seok YuHyun-Seok OhJi-Won HaMin-Goo Kim
    • Hyun-Seok YuHyun-Seok OhJi-Won HaMin-Goo Kim
    • H04K1/10
    • H04L27/2649H04L25/061H04L2027/0016
    • An optimum I/Q imbalance compensating apparatus and method in a zero-IF OFDM receiver. In the apparatus, a first compensator generates a first symbol by removing interference from a second distorted symbol on an (Ns−m+1)th subcarrier from a first distorted symbol on an mth subcarrier by a first compensation coefficient in an OFDM FFT signal of Ns subcarriers. A first hard decider generates a first compensated symbol by hard-decision on the first symbol, an error calculator generates an error symbol by subtracting the first received symbol from the first compensated symbol. A second compensator generates a second symbol by eliminating interference from the first distorted symbol from the second distorted symbol using a second compensation coefficient. A second hard decider generates a second compensated symbol by hard-decision on the second symbol, and an adaptive controller updates the first compensation coefficient using the error symbol and the second compensation symbol.
    • 零中频OFDM接收机中的最佳I / Q不平衡补偿装置和方法。 在该装置中,第一补偿器通过从第一失真符号(N SUB S-m + 1)第(S)个子载波上去除来自第二失真符号的干扰来产生第一符号 在第N个子载波上的OFDM FFT信号中的第一补偿系数。 第一硬判决器通过对第一符号进行硬判决来生成第一补偿符号,误差计算器通过从第一补偿符号减去第一接收符号来生成误差符号。 第二补偿器通过使用第二补偿系数消除来自第二失真符号的来自第一失真符号的干扰来产生第二符号。 第二硬判定器通过第二符号上的硬判决产生第二补偿符号,并且自适应控制器使用误差符号和第二补偿符号来更新第一补偿系数。