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    • 1. 发明申请
    • RECEIVING APPARATUS WITH FREQUENCY DOMAIN EQUALIZER
    • 接收具有频域均衡器的设备
    • US20100195710A1
    • 2010-08-05
    • US12619847
    • 2009-11-17
    • Richard STIRLING-GALLACHERRalf BoehnkeZhaocheng Wang
    • Richard STIRLING-GALLACHERRalf BoehnkeZhaocheng Wang
    • H04B1/10H03K5/159
    • H04L25/03159H04L25/0212H04L25/0224
    • The present invention relates to a receiving apparatus (1) for receiving signals in a wireless communication system, in which the signals comprise a dedicated channel estimation sequence, comprising a channel estimation means (6) adapted to perform a channel estimation on a dedicated channel estimation sequence comprised in a received signal, a noise reduction means (8) adapted to reduce noise in the channel estimation result obtained from the channel estimation means by setting complex samples of the channel estimation result which are below a noise threshold to zero, and a frequency domain equalizing means (12) adapted to perform an equalization on the received signal in the frequency domain on the basis of the noise reduced channel estimation result from the noise reduction means (8). The present invention further relates to corresponding method.The present invention enables an improvement of the equalisation performance.
    • 本发明涉及一种用于在无线通信系统中接收信号的接收装置(1),其中信号包括专用信道估计序列,其包括信道估计装置(6),适用于对专用信道估计进行信道估计 包括在接收信号中的序列,噪声降低装置(8),其适于通过将低于噪声阈值的信道估计结果的复样本设置为零来减少从信道估计装置获得的信道估计结果中的噪声,以及频率 域均衡装置(12),其适于基于来自噪声降低装置(8)的噪声降低的信道估计结果对频域中的接收信号执行均衡。 本发明还涉及相应的方法。 本发明能够提高均衡性能。
    • 4. 发明申请
    • TRANSMITTING DEVICE AND METHOD FOR TRANSMITTING SIGNALS IN A WIRELESS COMMUNICATION SYSTEM, RECEIVING DEVICE AND METHOD FOR RECEIVING SIGNALS IN A WIRELESS COMMUNICATION SYSTEM
    • 用于在无线通信系统中发送信号的发送设备和方法,接收设备和用于在无线通信系统中接收信号的方法
    • US20080227497A1
    • 2008-09-18
    • US12041181
    • 2008-03-03
    • Richard STIRLING-GALLACHERZhaocheng WANG
    • Richard STIRLING-GALLACHERZhaocheng WANG
    • H04M1/00
    • H04B1/0475H04B7/0617H04B7/0669H04B7/0671H04B7/068H04B7/0695H04B7/0697H04B7/086
    • A transmitting device for transmitting signals in a wireless communication system, includes at least two beam antennas, each beam antenna having a main beaming direction at a different angle and generating means for generating a number of signal streams to be transmitted within the wireless communication system, whereby the signal to be transmitted is split into these different streams and said number of signal streams corresponds to the number of beam antennas, whereby each signal stream is transmitted via a different beam antenna. Transmitting device for transmitting signals in a wireless communication system, comprising at least two beam antennas, each beam antenna having a main beaming direction at a different angle and generating means for generating a number of signal streams to be transmitted within the wireless communication system, whereby each of these signal streams comprises a different version of the data, and said number of signal streams corresponds to the number of beam antennas, whereby each signal stream is transmitted via a different beam antenna.
    • 一种用于在无线通信系统中发送信号的发送装置,包括至少两个波束天线,每个波束天线具有不同角度的主发射方向,以及生成装置,用于生成将在无线通信系统内发送的多个信号流, 由此将待传输的信号分成这些不同的流,并且所述信号流的数量对应于波束天线的数量,由此每个信号流经由不同的波束天线发射。 用于在无线通信系统中传输信号的发射装置,包括至少两个波束天线,每个波束天线具有不同角度的主发射方向,以及产生装置,用于产生将在无线通信系统内传输的多个信号流,由此 这些信号流中的每一个包括数据的不同版本,并且信号流的数量对应于波束天线的数量,由此每个信号流经由不同的波束天线发射。
    • 5. 发明申请
    • MINIMUM MEAN SQUARE ERROR EQUALISER WITH REDUCED COMPLEXITY
    • 最小平均误差均衡器具有降低的复杂性
    • US20090219981A1
    • 2009-09-03
    • US12327205
    • 2008-12-03
    • Zhaocheng WANGRichard STIRLING-GALLACHER
    • Zhaocheng WANGRichard STIRLING-GALLACHER
    • H04L27/01
    • H04L25/03159H04L2025/03414H04L2025/03426H04L2025/03522H04L2025/03535H04L2025/03726
    • The present invention relates to the field of communication devices, e.g. wireless communication devices. More particularly, the present invention relates to the field of signal equalisation, especially minimum mean square error equalisation. The present invention especially relates to an equaliser for a communication device, a method of equalising one or more received signals and a software program product for carrying out the method. The present invention reduces the size of a look-up table needed for a division operation and, generally, provides for a reduced complexity of the equaliser and receiver. The equaliser for a communication device comprises a filter calculator for determining a channel power value based on one or more channel response values and selecting one of two or more equaliser structures based on said channel power value and based on at least one threshold value for separating the channel power values into at least two ranges; and a filter for equalising one or more received signals according to the selected equaliser structure. Advantageously, at least one of said equaliser structures corresponds to an, at least approximated, minimum mean square error equaliser structure or to an, at least approximated, suboptimal minimum mean square error equaliser structure.
    • 本发明涉及通信设备的领域,例如, 无线通信设备。 更具体地说,本发明涉及信号均衡领域,特别是最小均方误差均衡。 本发明特别涉及一种用于通信设备的均衡器,一种均衡一个或多个接收信号的方法和用于执行该方法的软件程序产品。 本发明减小了划分操作所需的查找表的大小,并且通常提供了均衡器和接收机的复杂度降低。 用于通信设备的均衡器包括滤波器计算器,用于基于一个或多个信道响应值来确定信道功率值,并且基于所述信道功率值选择两个或多个均衡器结构中的一个,并且基于至少一个阈值来分离 通道功率值至少两个范围; 以及用于根据所选择的均衡器结构对一个或多个接收信号进行均衡的滤波器。 有利地,所述均衡器结构中的至少一个对应于至少近似的最小均方误差均衡器结构或至少近似的次优最小均方误差均衡器结构。
    • 6. 发明申请
    • ACTIVE IMAGING DEVICE AND METHOD FOR SPECKLE NOISE REDUCTION
    • 主动成像装置和减少噪声的方法
    • US20120019690A1
    • 2012-01-26
    • US13185061
    • 2011-07-18
    • Richard STIRLING-GALLACHER
    • Richard STIRLING-GALLACHER
    • H04N5/217
    • G06T5/002G01S7/2923G01S7/354G01S7/4876G01S7/493G01S7/52077G01S13/89G01S15/89G06T5/10G06T2207/10044G06T2207/10132G06T2207/20064
    • The present invention relates to an active imaging device and a corresponding device for imaging a scene, in particular for effectively reducing speckle noise. The proposed device comprises an illuminator that illuminates said scene with radiation, a radiation detector that detects radiation received from said scene in response to said illumination and that generates detection data from said detected radiation, an image constructor that constructs an image of said scene or one or more parts of said scene from the detection data, a noise reduction unit that processes said image by applying a one- or multi-dimensional transform to the complete image, to one or more parts of the image or to selected features in said image, and a transform selector that selects for the complete image, for one or more parts of the image or for selected features in said image a selected transform for application by said noise reduction unit resulting in the minimum speckle noise in the image, the respective part or the respective feature of the image.
    • 本发明涉及一种用于对场景成像的有源成像装置和相应的装置,特别是用于有效地减少斑点噪声。 所提出的装置包括用辐射照射所述场景的照明器;辐射检测器,其响应于所述照明检测从所述场景接收的辐射,并且从所述检测到的辐射产生检测数据;构建所述场景的图像的图像构造器或一个 或更多部分的所述场景;噪声降低单元,其通过对所述图像的一个或多个部分或所述图像中的所选特征对所述图像施加一维或多维变换来对所述图像进行处理, 以及变换选择器,为所述图像的一个或多个部分或所述图像中的所选特征选择所述完整图像,以由所述降噪单元施加所选择的变换,导致图像中的最小散斑噪声,相应部分或 图像的相应特征。
    • 8. 发明申请
    • MULTIPLE-INPUT MULTIPLE-OUTPUT SPATIAL MULTIPLEXING SYSTEM WITH DYNAMIC ANTENNA BEAM COMBINATION SELECTION CAPABILITY
    • US20070230639A1
    • 2007-10-04
    • US11682489
    • 2007-03-06
    • Richard STIRLING-GALLACHER
    • Richard STIRLING-GALLACHER
    • H04L1/02
    • H04L27/00H04B7/0408H04B7/0691H04B7/0695H04B7/0857H04B7/0874H04B7/088
    • The present invention generally relates to the field of wireless communication systems. It particularly refers to a spatial diversity transmitter (110) and a spatial diversity receiver (120) in a wireless multiple-input multiple-output (MIMO) spatial multiplexing system as well as a corresponding method for wirelessly transmitting and receiving modulated RF signals via multiple wireless signal propagation paths (Pl) of a multipath fading channel in a way that correlation between the MEMO channel components are reduced and/or the signal to interference plus noise ratio (SINR) is increased which hence result in an improved bit error rate (BER) or packet error rate (PER) performance of said wireless MIMO spatial multiplexing system. On the receiver side, for example, this is achieved by controlling at least one antenna switching and/or combining means (121a′+b′) to select a specific combination of different fixed beam antennas (121a+b) from each receiver-resident antenna array. According to the invention, said selection is based on estimated values of the channel impulse responses (hl(τl, t)) for said signal propagation paths (Pl). An antenna beam selection control means (129) is configured for selecting a specific antenna beam combination so as to maximize the average signal-to-interference-plus-noise ratios ( γl) of RF signals (rl(τl, t, φl)) received via said multiple wireless signal propagation paths (Pl) and/or to minimize the correlation coefficients (ρrl1rl2(t)) indicating the correlations of different pairs of these RF signals (rl1(τl1, t, φl1) and rl2(τl2, t, φl2)).Thereby, each fixed beam antenna (121a+b) of the receiver-resident antenna arrays has a distinct radiation pattern with a different beam center and/or beam width in the azimuth and/or elevation plane, wherein a superposition of all these radiation patterns may cover all possible azimuthal (φ) and/or elevational angles of arrival (θ) of an RF signal (s(t)).For compensating detected multipath fades in the channel amplitude response (|Hl(f, t)|) of at least one signal propagation path (Pl) between the spatial diversity transmitter (110) and the spatial diversity receiver (120), a receiver-resident channel estimation and/or equalization circuitry (124, 128) is applied.
    • 9. 发明申请
    • ACTIVE IMAGING DEVICE AND METHOD FOR SPECKLE NOISE REDUCTION
    • 主动成像装置和减少噪声的方法
    • US20110273585A1
    • 2011-11-10
    • US13087813
    • 2011-04-15
    • Richard STIRLING-GALLACHER
    • Richard STIRLING-GALLACHER
    • H04N9/73
    • G01S7/52046G01S7/411G01S7/4802G01S7/52077G01S13/89G01S15/8906G01S17/89G06T5/002G06T5/50G06T2207/10152G06T2207/20221
    • The present invention relates to an active imaging device for imaging a scene, comprising a scene illuminator that illuminates said scene with radiation at multiple illumination frequencies or an illumination frequency range covering multiple illumination frequencies, a radiation detector that detects radiation received from said scene in response to said illumination and that generates detection data from said detected radiation, a feature identifier that analyses said detection data and identifies different features in said scene, a frequency selector that separately selects for the identified features one or more selected illumination frequencies resulting in the minimum speckle noise in an image of the respective feature constructed from the detection data, which have been generated from radiation received in response to the illumination of the scene with radiation at said one or more selected illumination frequencies, and an image constructor that constructs a final image from the detection data, wherein the image portions of the identified features are constructed from the detection data, which have been generated from radiation received in response to the illumination of the scene with radiation at said one or more selected illumination frequencies, and wherein said image portions are combined into the final image.
    • 本发明涉及一种用于对场景成像的主动成像装置,包括:以多个照明频率的辐射或覆盖多个照明频率的照明频率范围照射所述场景的场景照明器;响应于从所述场景接收的辐射检测的辐射检测器 到所述照明并且从所述检测到的辐射产生检测数据,分析所述检测数据并识别所述场景中的不同特征的特征标识符;频率选择器,其分别选择所识别的特征一个或多个选择的照射频率,导致最小斑点 根据从由所述一个或多个所选照射频率的辐射响应场景的照明而接收的辐射产生的检测数据构成的各个特征的图像中的噪声,以及从所述一个或多个所选照射频率构建最终图像的图像构造器 的 检测数据,其中所识别的特征的图像部分是根据由所述一个或多个所选照射频率的辐射响应场景的照明而接收的辐射产生的检测数据构成的,其中所述图像部分是 结合成最终形象。