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    • 41. 发明申请
    • Methodology for designing high speed receivers below a target bit-error-rate
    • 用于设计低于目标误码率的高速接收机的方法
    • US20050182807A1
    • 2005-08-18
    • US10777238
    • 2004-02-12
    • Sridhar RamaswamySong WuBhavesh Bhakta
    • Sridhar RamaswamySong WuBhavesh Bhakta
    • G06F17/15H04L1/20H04L1/24H04L25/02
    • H04L1/24H04L1/203H04L25/0212
    • A method, and associated storage medium containing software and a system, comprises extracting a time domain impulse response from parameters that characterize a communication channel, generating a probability distribution function (PDF) of an output voltage based on the impulse response; and computing a relationship between bit error rate and voltage margin based on the final probability distribution function. Generating the PDF of the output voltage may comprise one or more of the following acts: quantizing the impulse response into a plurality of quantized levels, assigning taps to the quantized levels and determining a number of taps assigned to each quantized level, determining allowable voltage levels for each quantized level, and determining a probability of occurrence of each allowable voltage level, determining a PDF for each voltage level; and convolving all of the PDFs for the various voltage levels to obtain the PDF of the output voltage.
    • 一种包含软件和系统的方法和相关联的存储介质,包括从表征通信信道的参数中提取时域脉冲响应,基于脉冲响应产生输出电压的概率分布函数(PDF); 并基于最终概率分布函数计算误码率和电压余量之间的关系。 生成输出电压的PDF可以包括以下动作中的一个或多个:将脉冲响应量化为多个量化电平,为量化电平分配抽头并且确定分配给每个量化电平的抽头数量,确定容许电压电平 并且确定每个可允许电压电平的发生概率,确定每个电压电平的PDF; 并卷积所有PDF的各种电压电平,以获得输出电压的PDF。
    • 43. 发明授权
    • Internet phone using a USB interface to transmit signals
    • 网络电话使用USB接口传输信号
    • US06895000B2
    • 2005-05-17
    • US09772914
    • 2001-01-31
    • Cheng-Shing LaiJing-Song Wu
    • Cheng-Shing LaiJing-Song Wu
    • H04L29/06H04M1/253H04M3/533H04M7/00H04L12/66
    • H04M1/2535H04L29/06H04L29/06027H04L65/1059H04M3/533H04M7/0024H04M7/006Y10S379/90
    • The invention discloses an Internet phone transmitting signals through a USB interface, which comprises a thin client and a digital phone. The USB interface connects the thin client and the digital phone. The phone communication is achieved through the online function of the thin client. The voice message sending procedure transmits outgoing message signals to the thin client through the USB interface. The thin client converts the outgoing message signals into an outgoing message VOIP package. The outgoing message VOIP package is then transmitted through a network to a target. The voice message receiving procedure transmits an incoming message VOIP package from the target back to the thin client through the network and converts the incoming message VOIP package into incoming message signals. Further through the USB interface, the incoming message signals are transmitted to the digital phone. Finally, the voice message receiving procedure completes by outputting the incoming message signals through the digital phone.
    • 本发明公开了一种通过USB接口发送信号的因特网电话,该接口包括瘦客户端和数字电话。 USB接口连接瘦客户端和数字电话。 电话通信是通过瘦客户端的在线功能实现的。 语音留言发送程序通过USB接口向瘦客户端发送出站消息信号。 瘦客户端将传出的消息信号转换为传出消息VOIP包。 传出的消息VOIP包然后通过网络传输到目标。 语音消息接收过程通过网络将来自目标的传入消息VOIP包发送到瘦客户端,并将传入消息VOIP包转换为传入消息信号。 此外,通过USB接口,传入的消息信号被传送到数字电话。 最后,语音消息接收过程通过数字电话输出输入消息信号而完成。
    • 44. 发明授权
    • Phase and frequency offset compensation in a telecommunications receiver
    • 电信接收机中的相位和频率偏移补偿
    • US06370188B1
    • 2002-04-09
    • US09282403
    • 1999-03-31
    • Song WuDomingo G. GarciaMichael O. Polley
    • Song WuDomingo G. GarciaMichael O. Polley
    • H04B138
    • H04L27/2675H04L27/2657
    • A modem (55) including receive circuitry (30) implemented by way of a digital signal processor (32, 32′) is disclosed. The receive circuitry (30) operates according to a receive clock (CLKr) that is based upon the output of a free run oscillator (50). An incoming frequency multiplexed signal (f(t)) is sampled by an analog-to-digital converter (31) and demodulated by way of a Fast Fourier Transform function (36). After such demodulation, a phase rotation function (40) applies a phase shift to the demodulated signal corresponding to an estimated phase offset (&tgr;) between the receive clock (CLKr) and a pilot signal (P) transmitted by the transmitting modem; a finite impulse response filter function (42) applies a digital filter to the demodulated signal to correct for phase error based upon an estimated frequency offset (&Dgr;). According to another disclosed embodiment, a pre-emphasis FIR filter function (52) and a pre-emphasis phase rotation function (54) are applied to an upstream singal, based upon the estimated phase offset (&eegr;) and frequency offset (&Dgr;).
    • 公开了一种包括通过数字信号处理器(32,32')实现的接收电路(30)的调制解调器(55)。 接收电路(30)根据基于自由运行振荡器(50)的输出的接收时钟(CLKr)进行操作。 输入频率复用信号(f(t))由模拟 - 数字转换器(31)采样,并通过快速傅里叶变换功能(36)进行解调。 在这样的解调之后,相位旋转功能(40)对与由发送调制解调器发送的接收时钟(CLKr)和导频信号(P)之间的估计相位偏移(& tgr)相对应的解调信号施加相移; 有限脉冲响应滤波器函数(42)将数字滤波器应用于解调信号,以基于估计的频率偏移(DELTA)校正相位误差。 根据另一公开的实施例,基于估计的相位偏移(eta)和频率偏移(DELTA),将预加重FIR滤波器函数(52)和预加重相位旋转函数(54)应用于上行奇偶校验。
    • 45. 发明授权
    • Digital subscriber line modem initialization
    • 数字用户线调制解调器初始化
    • US06219378B1
    • 2001-04-17
    • US08995256
    • 1997-12-19
    • Song Wu
    • Song Wu
    • H03H730
    • H04L25/03159H04L5/1438H04L27/2623H04L2025/03414H04L2025/03445H04L2025/03522H04L2025/03617H04L2025/037H04L2025/0377H04L2025/03789H04M11/062
    • A method of initializing the operation of a remote modem (10) and central office modem (20k) for asymmetric subscriber line modem communications over a twisted pair wire facility (TWP), using discrete multi-tone technology, is disclosed. The initialization process begins with the remote modem (10) issuing an initialization request, in response to which the central office modem (20k) issues an acknowledgment. The remote modem (10) includes a low-cost analog filter (21) for separating upstream communication echoes from downstream data. This analog filter (21) increases the duration of impulse response over the channel, and thus requires time-domain equalization (TEQ) process (31) performed by the remote modem (10) to filter relatively long circular prefixes, so that intersymbol interference is eliminated. Transceiver training processes (62R, 62C) are carried out, through the generation of a pseudo-random sequence of frames by the central office modem (20k), the receipt of which is used by the remote modem (10) to establish its TEQ coefficients and taps in an optimal manner.
    • 公开了一种使用离散多音调技术来初始化双绞线设备(TWP)的用于非对称用户线调制解调器通信的远程调制解调器(10)和中心局调制解调器(20k)的操作的方法。 初始化过程从远程调制解调器(10)开始发出初始化请求,响应于该中央局调制解调器(20k)发出确认。 远程调制解调器(10)包括用于将上游通信回波与下游数据分离的低成本模拟滤波器(21)。 该模拟滤波器(21)增加了信道上的脉冲响应的持续时间,因此需要由远程调制解调器(10)执行的时域均衡(TEQ)处理(31)以过滤较长的圆形前缀,使得符号间干扰是 消除了 收发器训练处理(62R,62C)通过由中心局调制解调器(20k)产生帧的伪随机序列来执行,其接收由远程调制解调器(10)用于建立其TEQ系数 并以最佳方式轻拍。
    • 46. 发明授权
    • Fast equalizer training and frame synchronization algorithms for
discrete multi-tone (DMT) system
    • 用于离散多音(DMT)系统的快速均衡器训练和帧同步算法
    • US6021167A
    • 2000-02-01
    • US203054
    • 1998-12-01
    • Song Wu
    • Song Wu
    • H04L1/00H04L5/14H04L25/03H04L25/49H04L27/26H04M11/06H04L7/00
    • H04L1/0059H04L1/0009H04L25/03343H04L25/4921H04L27/2647H04L5/1438H04M11/062
    • A modem selectively operated in the voice and higher frequency band which supports multiple line codes. The modem uses a digital signal processor so that different existing ADSL line codes can be implemented on the same hardware platform. The modem negotiates in real-time for a desired line transmission rate to accommodate line condition and service-cost requirement. The line code and rate negotiation process may be implemented at the beginning of each communication session through the exchange of tones between the modems. A four-step MDSL modem initialization process is provided for line code and rate compatibility. A synchronization startup procedure for DMT based MDSL modems is provided. The handshake protocol and receiver algorithm allow reliable standard telephone twisted-pair wire. The algorithm makes use of a short length sequence to train a synchronizing equalizer at the receiver. After training to this sequence, a matched filter or correlator is used to detect the inverted sync sequence. The detection of the inverted sequence signals the start of the normal reference training of the DMT equalizers. The MDSL line connection management process provides a simple, efficient, and flexible interface to manage the line connection between MDSL-C and MDSL-R in the telecommunication WAN environment. An internal state machine in an MDSL modem records and monitors the line status and notifies the state change to the other MDSL and also to the host processor. The protocol used for exchanging line connection management messages is a simplified LCP for MDSL.
    • 调制解调器选择性地操作在支持多行代码的语音和更高频带中。 调制解调器使用数字信号处理器,以便在同一个硬件平台上实现不同的现有ADSL线路代码。 调制解调器实时协商所需的线路传输速率,以适应线路状况和服务成本要求。 线路码和速率协商过程可以在每个通信会话开始时通过调制解调器之间的音调交换来实现。 提供了四步MDSL调制解调器初始化过程,用于线路代码和速率兼容性。 提供了基于DMT的MDSL调制解调器的同步启动过程。 握手协议和接收机算法允许可靠的标准电话双绞线。 该算法利用短长度序列在接收机上训练同步均衡器。 在训练到该序列之后,使用匹配滤波器或相关器来检测反相同步序列。 反转序列的检测表明DMT均衡器的正常参考训练的开始。 MDSL线路连接管理流程提供了一种简单,高效,灵活的接口,用于管理电信WAN环境中MDSL-C和MDSL-R之间的线路连接。 MDSL调制解调器中的内部状态机记录和监视线路状态,并将状态更改通知给其他MDSL以及主机处理器。 用于交换线路连接管理消息的协议是MDSL的简化LCP。
    • 48. 发明申请
    • ARRAY SUBSTRATE, LIQUID CRYSTAL DISPLAY PANEL AND BROKEN-LINE REPAIRING METHOD THEREOF
    • 阵列基板,液晶显示面板及其线切割方法
    • US20130155342A1
    • 2013-06-20
    • US13698871
    • 2012-08-01
    • Song Wu
    • Song Wu
    • H01L21/66G02F1/1362H01L27/15
    • H01L22/20G02F1/136259G02F2001/136263G02F2201/122H01L27/156H01L2924/0002H01L2924/00
    • According to the present disclosure, there is disclosed an array substrate, a liquid crystal display panel and a broken-line repairing method thereof. The array substrate comprises: signal lines, which includes a plurality of gate lines and a plurality of data lines intersecting with each other; and a plurality of pixel units defined by the gate lines and the data lines, wherein a thin film transistor, a common electrode and a pixel electrode, which is connected to a drain of the thin film transistor, are formed in each of the pixel units, for each of the pixel units, at the positions of two corners which are adjacent to one of the data lines, a first repair area and a second repair area are formed, respectively; within the first repair area and the second repair area, patterns of the pixel electrode and the data line overlap, and there is no pattern of the common electrode.
    • 根据本公开,公开了一种阵列基板,液晶显示面板及其虚线修复方法。 阵列基板包括:信号线,其包括多条栅极线和与彼此相交的多条数据线; 以及由栅极线和数据线限定的多个像素单元,其中连接到薄膜晶体管的漏极的薄膜晶体管,公共电极和像素电极形成在每个像素单元中 对于每个像素单元,在与数据线之一相邻的两个角部的位置处分别形成第一修复区域和第二修复区域; 在第一修复区域和第二修复区域内,像素电极和数据线的图案重叠,并且没有公共电极的图案。