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    • 1. 发明授权
    • Channel estimating method and device
    • 信道估计方法及装置
    • US08711914B2
    • 2014-04-29
    • US13463452
    • 2012-05-03
    • Gengshi WuMeng HuaChunling ZhangShurong JiaoXiuqin Peng
    • Gengshi WuMeng HuaChunling ZhangShurong JiaoXiuqin Peng
    • H04B3/46
    • H04L27/3863H04B1/7113H04L25/0216H04L25/0234
    • A channel estimating method and device are provided. The method includes: performing multi-path searching on a pilot channel, and performing interpolation on a channel estimation value at a radial position of the multi-path searching (101); performing raised cosine de-convolution on the channel estimation value that undergoes the interpolation (102); acquiring the channel estimation value at each radial position in the pilot channel according to the channel estimation value that undergoes the raised cosine de-convolution and a sample deviation acquired by performing the multi-path searching (103). The channel estimating method and device eliminate the sample deviation of the channel estimation value, improve the demodulation performance, and evidently reduce the operation workload.
    • 提供了一种信道估计方法和装置。 该方法包括:在导频信道上进行多路径搜索,并对多路径搜索的径向位置处的信道估计值进行内插(101); 对经历内插的信道估计值执行升余弦去卷积(102); 根据经历升余弦去卷积的信道估计值和通过执行多路径搜索获得的采样偏差,获取导频信道中每个径向位置处的信道估计值(103)。 信道估计方法和设备消除了信道估计值的采样偏差,提高了解调性能,显着降低了操作工作量。
    • 2. 发明申请
    • CHANNEL ESTIMATING METHOD AND DEVICE
    • 信道估计方法和设备
    • US20120213264A1
    • 2012-08-23
    • US13463452
    • 2012-05-03
    • Gengshi WuMeng HuaChunling ZhangShurong JiaoXiuqin Peng
    • Gengshi WuMeng HuaChunling ZhangShurong JiaoXiuqin Peng
    • H04B3/46
    • H04L27/3863H04B1/7113H04L25/0216H04L25/0234
    • A channel estimating method and device are provided. The method includes: performing multi-path searching on a pilot channel, and performing interpolation on a channel estimation value at a radial position of the multi-path searching (101); performing raised cosine de-convolution on the channel estimation value that undergoes the interpolation (102); acquiring the channel estimation value at each radial position in the pilot channel according to the channel estimation value that undergoes the raised cosine de-convolution and a sample deviation acquired by performing the multi-path searching (103). The channel estimating method and device eliminate the sample deviation of the channel estimation value, improve the demodulation performance, and evidently reduce the operation workload.
    • 提供了一种信道估计方法和装置。 该方法包括:在导频信道上进行多路径搜索,并对多路径搜索的径向位置处的信道估计值进行内插(101); 对经历内插的信道估计值执行升余弦去卷积(102); 根据经历升余弦去卷积的信道估计值和通过执行多路径搜索获得的采样偏差,获取导频信道中每个径向位置处的信道估计值(103)。 信道估计方法和设备消除了信道估计值的采样偏差,提高了解调性能,显着降低了操作工作量。
    • 3. 发明授权
    • Signal detecting method and device for multi-codeword MIMO system
    • 用于多码字MIMO系统的信号检测方法和装置
    • US08300677B2
    • 2012-10-30
    • US12981878
    • 2010-12-30
    • Meng HuaGengshi WuChunling ZhangShurong Jiao
    • Meng HuaGengshi WuChunling ZhangShurong Jiao
    • H04B1/00
    • H04L1/06H04L25/0242
    • A signal detecting method and device for a multi-codeword multi-input multi-output (MIMO) system are provided, which are used in the field of communication and solve the problem that it is complex to implement a signal detecting method in the multi-codeword MIMO system and the error between the signal obtained through detection and the signal actually transmitted from the transmitting end is large. The method includes: converting a received complex number signal into a real number signal; performing channel estimation to obtain a channel matrix; correcting the channel matrix to obtain an equivalent corrected matrix; generating an equivalent detecting signal according to the equivalent corrected matrix and the real number signal obtained through conversion; quantizing the equivalent detecting signal to obtain an equivalent quantized detecting signal; and generating a signal transmitted from a transmitting end according to the equivalent quantized detecting signal. The method and device can be applied in a receiving device of a multi-codeword MIMO system.
    • 提供了一种用于多码字多输入多输出(MIMO)系统的信号检测方法和装置,其用于通信领域,并且解决了在多通道中实现信号检测方法复杂的问题, 码字MIMO系统和通过检测获得的信号与从发送端实际发送的信号之间的误差大。 该方法包括:将接收到的复数信号转换为实数信号; 执行信道估计以获得信道矩阵; 校正信道矩阵以获得等效校正矩阵; 根据等效校正矩阵和通过转换获得的实数信号产生等效检测信号; 量化等效检测信号以获得等效量化检测信号; 以及根据等效量化检测信号生成从发送端发送的信号。 该方法和装置可以应用于多码字MIMO系统的接收装置中。
    • 4. 发明授权
    • Method and device for determining smooth window length in channel estimation
    • 用于确定信道估计中平滑窗口长度的方法和装置
    • US08780956B2
    • 2014-07-15
    • US13191151
    • 2011-07-26
    • Gengshi WuFengyu SunMeng HuaChunling ZhangShurong Jiao
    • Gengshi WuFengyu SunMeng HuaChunling ZhangShurong Jiao
    • H04B1/7073H04L25/02
    • H04L25/0228
    • A method and a device for determining a smooth window length in channel estimation is provided. The method includes: obtaining autocorrelation values of pilot signals, where the autocorrelation values include first autocorrelation values and second autocorrelation values, at least two first autocorrelation values exist, and at least one second autocorrelation value exists; determining a speed range according to symbols of the first autocorrelation values or the symbols of the first autocorrelation values and a ratio value between the second autocorrelation value and one of the first autocorrelation values; and determining the smooth window length according to the speed range. Through the method provided in embodiments of the present invention, the problems caused by a fixed smooth window length may be avoided, and this improves system performance.
    • 提供了一种用于确定信道估计中的平滑窗口长度的方法和装置。 该方法包括:获得导频信号的自相关值,其中自相关值包括第一自相关值和第二自相关值,存在至少两个第一自相关值,并且存在至少一个第二自相关值; 根据所述第一自相关值的符号或所述第一自相关值的符号以及所述第二自相关值与所述第一自相关值之一之间的比值确定速度范围; 并根据速度范围确定平滑的窗口长度。 通过本发明实施例提供的方法,可以避免固定平滑窗口长度引起的问题,从而提高系统性能。
    • 5. 发明授权
    • Channel estimation method of an orthogonal frequency division multiplexing system and receiving apparatus
    • 正交频分复用系统和接收装置的信道估计方法
    • US08335270B2
    • 2012-12-18
    • US13151998
    • 2011-06-02
    • Meng HuaGengshi WuBing TangShurong Jiao
    • Meng HuaGengshi WuBing TangShurong Jiao
    • H04K1/10H04J3/12
    • H04L25/0232H04L25/022
    • A channel estimation method of an Orthogonal Frequency Division Multiplexing (OFDM) system and a corresponding receiving apparatus are provided. The technical solutions use the receiving apparatus to firstly perform channel estimation in time dimension on received signals, obtain channel information of pilot points from an effective sub-carrier frequency band on a frequency domain of each OFDM symbol, obtain information of the pilot points on frequency bands outside the effective sub-carrier frequency band by adding the information of the pilot points, and then perform Inverse Fast Fourier Transform (IFFT), windowing, zero-padding, and Fast Fourier Transform (FFT) to obtain a channel frequency response, so as to obtain a channel estimation result. The technical solutions can achieve goals of restraining an edge effect and improving accuracy of the channel estimation.
    • 提供了正交频分复用(OFDM)系统的信道估计方法和相应的接收装置。 技术方案使用接收装置首先对接收信号的时间维度进行信道估计,从​​每个OFDM符号的频域上的有效子载波频带获取导频点的信道信息,获取频率上的导频点的信息 然后进行快速傅立叶逆变换(IFFT),加窗,零填充和快速傅立叶变换(FFT),获得频道响应,从而使有效子载波频带之外的频带被加入 以获得信道估计结果。 技术解决方案可以实现限制边缘效应和提高信道估计精度的目标。
    • 6. 发明申请
    • CHANNEL ESTIMATION METHOD OF AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM AND RECEIVING APPARATUS
    • 正交频分多路复用系统和接收装置的信道估计方法
    • US20110228868A1
    • 2011-09-22
    • US13151998
    • 2011-06-02
    • Meng HuaGengshi WuBing TangShurong Jiao
    • Meng HuaGengshi WuBing TangShurong Jiao
    • H04L27/28H04L27/06
    • H04L25/0232H04L25/022
    • A channel estimation method of an Orthogonal Frequency Division Multiplexing (OFDM) system and a corresponding receiving apparatus are provided. The technical solutions use the receiving apparatus to firstly perform channel estimation in time dimension on received signals, obtain channel information of pilot points from an effective sub-carrier frequency band on a frequency domain of each OFDM symbol, obtain information of the pilot points on frequency bands outside the effective sub-carrier frequency band by adding the information of the pilot points, and then perform Inverse Fast Fourier Transform (IFFT), windowing, zero-padding, and Fast Fourier Transform (FFT) to obtain a channel frequency response, so as to obtain a channel estimation result. The technical solutions can achieve goals of restraining an edge effect and improving accuracy of the channel estimation.
    • 提供了正交频分复用(OFDM)系统的信道估计方法和相应的接收装置。 技术方案使用接收装置首先对接收信号的时间维度进行信道估计,从​​每个OFDM符号的频域上的有效子载波频带获取导频点的信道信息,获取频率上的导频点的信息 然后进行快速傅立叶逆变换(IFFT),加窗,零填充和快速傅立叶变换(FFT),获得频道响应,从而使有效子载波频带之外的频带被加入 以获得信道估计结果。 技术解决方案可以实现限制边缘效应和提高信道估计精度的目标。
    • 10. 发明授权
    • Method and apparatus for eliminating frequency-domain interference signals
    • 消除频域干扰信号的方法和装置
    • US08437412B2
    • 2013-05-07
    • US12636333
    • 2009-12-11
    • Meng HuaYan YangJing YangGengshi Wu
    • Meng HuaYan YangJing YangGengshi Wu
    • H04L27/28H04L27/06H04B1/10
    • H04B1/7107H04B1/7102
    • The present invention discloses a method and an apparatus for eliminating frequency-domain interference signals, and relates to communication technologies. The method includes: multiplying a frequency-domain channel estimation value by a frequency-domain interference signal to obtain a frequency-domain received interference signal; and subtracting the frequency-domain received interference signal from the frequency-domain received signal to obtain the frequency-domain received signal free of interference. The apparatus includes a multiplying module and a subtracting module. A frequency-domain equalizer includes an interference signal obtaining module and an interference signal eliminating module. The technical solution provided herein eliminates interference signals in the frequency domain, and saves the calculation load in contrast with elimination of time-domain interference signals.
    • 本发明公开了一种消除频域干扰信号的方法和装置,涉及通信技术。 该方法包括:将频域信道估计值乘以频域干扰信号以获得频域接收干扰信号; 并从频域接收信号中减去频域接收干扰信号,得到无干扰的频域接收信号。 该装置包括乘法模块和减法模块。 频域均衡器包括干扰信号获取模块和干扰信号消除模块。 这里提供的技术方案消除了频域中的干扰信号,并且与消除时域干扰信号相反,节省了计算负荷。