公开(公告)号：US20090010347A1

公开(公告)日：2009-01-08

申请号：US12143324

申请日：2008-06-20

Applicant: LIN YANG ,  Qin Liu

Inventor： LIN YANG ,  Qin Liu

IPC: H04L27/28

CPC classification number: H04L27/2605 ,  H04L5/0007 ,  H04W52/146 ,  H04W52/243 ,  H04W52/245 ,  H04W52/246

Abstract: In a TDS-OFDM communications system, within a frame time, a transmitted signal comprising a preamble, a downlink sub-frame, and an uplink sub-frame. Within the downlink sub-frame, interposed between sub-frames are guard intervals comprising known sequences. The known sequences are used for an estimation of a received power. A method comprising the step of using a guard sequence in a guard interval of OFDM symbols of the received TDS-OFDM signals in the downlink to estimate a received signal power or an interference power is provided.

Abstract translation: 在TDS-OFDM通信系统中，在帧时间内，包括前导码，下行链路子帧和上行链路子帧的发送信号。 在下行链路子帧内，插入子帧之间是包括已知序列的保护间隔。 已知的序列用于估计接收功率。 提供了一种在下行链路中接收的TDS-OFDM信号的OFDM符号的保护间隔中使用保护序列来估计接收信号功率或干扰功率的方法。

公开(公告)号：US20090010345A1

公开(公告)日：2009-01-08

申请号：US12143298

申请日：2008-06-20

Applicant: Lin Yang ,  Qin Liu

Inventor： Lin Yang ,  Qin Liu

IPC: H04K1/10

CPC classification number: H04L27/2605 ,  H04B17/327 ,  H04L5/0007 ,  H04L5/0044 ,  H04L27/2613

Abstract: In a TDS-OFDMA communications system, a frame structure comprising: a frame such that within a frame time, a transmitted signal comprising a preamble, a downlink sub-frame, and an uplink sub-frame; and interposed between OFDM symbols are guard intervals comprising known sequences being used for an estimation of a received power.

Abstract translation: 在TDS-OFDMA通信系统中，一种帧结构，包括：帧，使得在帧时间内包括前导码，下行链路子帧和上行链路子帧的发送信号; 并且插入在OFDM符号之间是保护间隔，其包括用于估计接收功率的已知序列。

公开(公告)号：US20080232483A1

公开(公告)日：2008-09-25

申请号：US11689482

申请日：2007-03-21

Applicant: Lin Yang ,  Qin Liu

Inventor： Lin Yang ,  Qin Liu

IPC: H04L27/28

CPC classification number: H04L27/2647 ,  H04L25/0228 ,  H04L25/03159 ,  H04L27/2605 ,  H04L27/261

Abstract: In an OFDM system having pseudo-noise (PN) sequences as guard intervals, a method for channel estimation and equalization is provided. The method comprising the steps of: providing a frequency equalization scheme; providing a time domain filter; and combining the frequency equalization with time-domain filter, thereby a time lag effect is taken into consideration for the channel estimation and equalization.

Abstract translation: 在具有伪噪声（PN）序列作为保护间隔的OFDM系统中，提供了用于信道估计和均衡的方法。 该方法包括以下步骤：提供频率均衡方案; 提供时域过滤器; 并且将频率均衡与时域滤波器组合，从而考虑信道估计和均衡的时滞效应。

公开(公告)号：US20080225968A1

公开(公告)日：2008-09-18

申请号：US12048273

申请日：2008-03-14

Applicant: Lin Yang ,  Qin Liu

Inventor： Lin Yang ,  Qin Liu

IPC: H04J11/00

CPC classification number: H04L25/022 ,  H04J13/0022 ,  H04L25/0204 ,  H04L25/0224

Abstract: In an orthogonal frequency division multiplexing (OFDM) multiple-input multiple-output (MIMO) wireless communication system where both a transmitter and a receiver include a plurality of antennas, a method comprising the steps of: a receiver using at least one pseudo noise (PN) to associate desired information relating to a received symbol; and transforming the correlated information into frequency domain.

Abstract translation: 在发射机和接收机都包括多个天线的正交频分复用（OFDM）多输入多输出（MIMO）无线通信系统中，一种方法包括以下步骤：使用至少一个伪噪声（ PN）以关联与接收到的符号相关的期望信息; 并将相关信息转换为频域。

公开(公告)号：US07860157B2

公开(公告)日：2010-12-28

申请号：US11876368

申请日：2007-10-22

Applicant: Lin Yang ,  Qin Liu

Inventor： Lin Yang ,  Qin Liu

IPC: H03H7/30

CPC classification number: H04L25/0236 ,  H04L25/03057 ,  H04L2025/03382 ,  H04L2025/03477 ,  H04L2025/03484 ,  H04L2025/03611 ,  H04L2025/0377

Abstract: A circuit structure has a channel estimator adapted to receive an input, an equalizer adapted to receive the input and generate an equalized output, and an equalizer training block adapted to receive estimated channel condition information, and provide a set of trained coefficients to the equalizer. The equalized output is used by the channel estimator for at least one subsequent channel estimation. The channel estimator, the equalizer, and the equalizer training block are looped together.

Abstract translation: 电路结构具有适于接收输入的信道估计器，适于接收输入并产生均衡输出的均衡器，以及适于接收估计信道条件信息的均衡器训练块，以及向均衡器提供一组经过训练的系数。 均衡输出由信道估计器用于至少一个后续信道估计。 信道估计器，均衡器和均衡器训练块循环在一起。

公开(公告)号：US20090316680A1

公开(公告)日：2009-12-24

申请号：US12143344

申请日：2008-06-20

Applicant: LIN YANG ,  Qin Liu

Inventor： LIN YANG ,  Qin Liu

IPC: H04J3/06 ,  H04L27/28 ,  H04Q7/00

CPC classification number: H04L5/0048 ,  H04L5/0007 ,  H04L27/2605

Abstract: In a TDS-OFDM communications system, within a frame time, a transmitted signal comprising a preamble, a downlink sub-frame, and an uplink sub-frame. Within the downlink sub-frame, interposed between sub-frames are guard intervals that have known sequences positioned therein. The known sequences are used for an estimation of a received power. A method comprising the step of using a guard sequence in a guard interval of OFDM symbols of the received TDS-OFDM signals in the downlink or the uplink to estimate a received signal power and using the estimated signal power to calculate a CINR is provided.

Abstract translation: 在TDS-OFDM通信系统中，在帧时间内，包括前导码，下行链路子帧和上行链路子帧的发送信号。 在下行链路子帧之间，插入在子帧之间是具有定位在其中的已知序列的保护间隔。 已知的序列用于估计接收功率。 提供了一种方法，其包括在下行链路或上行链路中接收的TDS-OFDM信号的OFDM符号的保护间隔中使用保护序列来估计接收信号功率并使用估计信号功率来计算CINR的步骤。

公开(公告)号：US06996192B1

公开(公告)日：2006-02-07

申请号：US10359430

申请日：2003-02-05

Applicant: Qin Liu ,  Lin Yang

Inventor： Qin Liu ,  Lin Yang

IPC: H04L27/06

CPC classification number: H04L27/2657 ,  H04L27/2675 ,  H04L27/2695

Abstract: Method and system for adaptively estimating and compensating for phase noise error in a received signal s(t;data). A plurality of transmission parameter symbol (TPS) sets, each with a representative TPS group frequency, are incorporated in the signal before transmission. Received channel response amplitudes are analyzed to select a particular TPS frequency group, and inverse Fourier transforms, N(t) and D(t), are computed for these chosen signals. A complex ratio, r(t)=N(t)/D(t), is computed and used to determine a phase angle φ(t). A phase noise error compensated, time domain signal, equal to exp{−jφ(t)}·s(t−Δt(delay);data) is provided.

Abstract translation: 用于自适应地估计和补偿接收信号s（t;数据）中的相位噪声误差的方法和系统。 具有代表性的TPS组频率的多个传输参数符号（TPS）集合被并入传输之前的信号中。 分析接收的信道响应幅度以选择特定的TPS频率组，并且为这些选择的信号计算反傅立叶变换N（t）和D（t）。 计算复数比r（t）= N（t）/ D（t）并用于确定相位角phi（t）。 提供相位噪声误差补偿，时域信号等于exp {-jphi（t.s（t-Deltat（delay）; data）。

公开(公告)号：US20080225997A1

公开(公告)日：2008-09-18

申请号：US12048353

申请日：2008-03-14

Applicant: Lin Yang ,  Qin Liu

Inventor： Lin Yang ,  Qin Liu

IPC: H04L27/06

CPC classification number: H04L27/2657 ,  H04L27/2613 ,  H04L27/2675

Abstract: In a TDS-OFDM system, frequency offset estimate provided. A method for estimating a frequency offset comprising the step of correlating a known PN sequence with a received signal.

Abstract translation: 在TDS-OFDM系统中，提供频偏估计。 一种用于估计频偏的方法，包括将已知PN序列与接收信号相关的步骤。

公开(公告)号：US20080225969A1

公开(公告)日：2008-09-18

申请号：US12048322

申请日：2008-03-14

Applicant: LIN YANG ,  Qin Liu

Inventor： LIN YANG ,  Qin Liu

IPC: H04K1/10

CPC classification number: H04L27/2605

Abstract: In a TDS-OFDM system, a method for transmission is provided. The method comprises the step of: adjusting a PN sequence length, whereby a required performance is maintained. The adjusting step comprises increasing, decreasing, or keep unchanging the PN sequence length.

Abstract translation: 在TDS-OFDM系统中，提供了一种用于传输的方法。 该方法包括以下步骤：调整PN序列长度，由此保持所需的性能。 调整步骤包括增加，减少或保持不变PN序列长度。

公开(公告)号：US07170944B1

公开(公告)日：2007-01-30

申请号：US10291154

申请日：2002-11-07

Applicant: Qin Liu ,  Lin Yang

Inventor： Qin Liu ,  Lin Yang

IPC: H04L27/28 ,  H04J11/00

CPC classification number: H04L25/03006 ,  H04B1/7113 ,  H04L25/0202 ,  H04L27/261 ,  H04L2025/03598

Abstract: Method and system for determining whether one or more multipath signals is present in a received signal frame that includes a reference symbol (RS) sequence RS(t;m1) as part of the frame, and for iteratively evaluating a multipath signal that is present. The RS sequence index (m1) for the frame is identified, and first and second Fourier transforms Φ(f;m1;ref) and Φ(f;rec) for the received frame are provided for a selected time segment IS that includes the RS sequence of the received frame. An inverse Fourier transform σ(t;m1) of the ratio of the transforms is computed and analyzed. If at least one multipath signal is present, σ(t;m1) is nonlinearly filtered, and the filtered function is convolved with RS(t;m1). This convolution represents a received signal extension, due to multipath signal(s) presence. A refinement procedure analyzes a contribution to multipath signals from the preceding frame(s). The procedure is iteratively driven toward an optimal representation of any multipath signal(s) present.

Abstract translation: 用于确定在包括作为帧的一部分的参考符号（RS）序列RS（t; m 1）的接收信号帧中是否存在一个或多个多径信号的方法和系统，并且用于迭代地评估存在的多径信号 。 识别该帧的RS序列索引（m 1），并且为所选择的时间段IS提供接收帧的第一和第二傅里叶变换Phi（f; m 1; ref）和Phi（f; rec） 接收帧的RS序列。 计算和分析变换比率的傅立叶逆变换Σ（t; m 1）。 如果存在至少一个多径信号，则σ（t; m 1）被非线性滤波，滤波后的函数与RS（t; m 1）卷积。 由于多路径信号存在，该卷积表示接收到的信号扩展。 细化程序分析对来自前一帧的多路径信号的贡献。 该过程被迭代地驱动到存在的任何多径信号的最佳表示。