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    • 1. 发明授权
    • Offset compensation in parallel analogue-digital converters
    • 并行模数转换器的偏移补偿
    • US06377195B1
    • 2002-04-23
    • US09544335
    • 2000-04-06
    • Jan-Erik EklundFredrik Gustafsson
    • Jan-Erik EklundFredrik Gustafsson
    • H03M110
    • H03M1/0641H03M1/1215
    • The present invention relates to a method of offset compensating a parallel analogue-digital converter that includes at least two channels (35), where the analogue to digital conversion takes place simultaneously in the various channels but offset relative to respective channels. An analogue input signal (10) to the analogue-digital converter is multiplied by +1 or by −1 in accordance with an arbitrary pattern and the output signal from the analogue-digital converter is multiplied by +1 or by −1 in accordance with the same arbitrary pattern as that by which the input signal was multiplied. The invention also includes a parallel analogue-digital converter for carrying out the method.
    • 本发明涉及一种补偿补偿并行模拟数字转换器的方法,该并行模数转换器包括至少两个通道(35),其中模拟到数字转换同时发生在各种通道中,但相对于各个通道偏移。 模拟数字转换器的模拟输入信号(10)根据任意模式乘以+1或-1,根据模拟数字转换器的输出信号乘以+1或-1 与输入信号相乘的任意图案相同。 本发明还包括用于执行该方法的并行模拟 - 数字转换器。
    • 4. 发明授权
    • Transmit power control time delay compensation in a wireless communications system
    • 在无线通信系统中发送功率控制时间延迟补偿
    • US06493541B1
    • 2002-12-10
    • US09346316
    • 1999-07-02
    • Fredrik GunnarssonNiclas WibergFredrik Gustafsson
    • Fredrik GunnarssonNiclas WibergFredrik Gustafsson
    • H04B100
    • H04W52/221H04W52/223
    • The present invention compensates for transmit power control time delays between a radio transmitter and receiver that adversely affect the transmit power control process. A time delay associated with a power control loop is compensated for by adjusting a detected signal quality value of a received signal, e.g., signal-to-interference ratio (SIR), based on one or more previous power control commands already sent but whose effect has not yet been experienced. Because the determined signal quality value of the received signal is adjusted based on one or more power control commands already sent but yet to take effect, the transmit power level control command is appropriately determined so that it also takes into account a power control loop time delay. The delay compensation value may be determined based on the output power of a single, previously generated transmit power control command, or on plural previously generated transmit power control commands, depending upon the length of the time delay. If the adjusted signal quality parameter exceeds the target signal quality parameter, the generated power control command directs a decrease in transmit power, and the compensation factor causes a decrease in the subsequently determined signal quality parameter. If the adjusted signal quality parameter is less than the target signal quality parameter, the generated power control command directs an increase in transmit power, and the compensation factor causes an increase in the subsequently determined signal quality parameter.
    • 本发明补偿对发射功率控制过程产生不利影响的无线电发射机和接收机之间的发射功率控制时间延迟。 通过基于已经发送的一个或多个先前的功率控制命令来调整接收信号的检测信号质量值,例如信号干扰比(SIR)来补偿与功率控制回路相关联的时间延迟,但其效果 还没有经验。 由于接收信号的确定的信号质量值是基于一个或多个功率控制命令进行了调整而已经发送但尚未起作用的,所以适当确定发射功率电平控制命令,以便也考虑功率控制环路延时 。 延迟补偿值可以基于单个先前生成的发送功率控制命令的输出功率或者根据时间延迟的长度在多个先前生成的发送功率控制命令上确定。 如果调整后的信号质量参数超过了目标信号质量参数,则生成的功率控制命令指示发送功率的降低,并且补偿因子导致随后确定的信号质量参数的降低。 如果调整后的信号质量参数小于目标信号质量参数,则生成的功率控制命令指示发送功率的增加,并且补偿因素导致随后确定的信号质量参数的增加。
    • 6. 发明申请
    • System And Method For Simulation Of Acoustic Feedback
    • 声学反馈仿真系统与方法
    • US20080091393A1
    • 2008-04-17
    • US11667360
    • 2005-11-16
    • Fredrik Gustafsson
    • Fredrik Gustafsson
    • G06G7/48
    • G10H3/26G10H1/125G10H5/007G10H2250/521G10H2250/531
    • The invention describes an apparatus for software or hardware emulation of acoustic feedback effects. The invention comprises an analog to digital interface (200) for the input, whose output is summed (202) with a feedback of this digital signal passing through an amplifier model (204), a room acoustics model (206) and a string model (210). The summed signal (202) is converted from digital to analog (205) and can then be connected to a standard amplifier. The room acoustic model comprises a volume control (208) where the degree of feedback is controlled, while the string model contains a model (212) of which harmonics to feed back, and finally an algorithm (214) that decides which fundamental frequencies that the incoming digital signal contains.
    • 本发明描述了一种用于声学反馈效应的软件或硬件仿真的装置。 本发明包括用于输入的模拟数字接口(200),其输出与通过放大器模型(204)的数字信号的反馈,房间声学模型(206)和串模型(202)相加 210)。 加法信号(202)从数字转换成模拟(205),然后可以连接到标准放大器。 房间声学模型包括其中控制反馈程度的音量控制(208),而弦模型包含其中要反馈的谐波的模型(212),最后是确定哪个基频 输入数字信号包含。
    • 7. 发明授权
    • Tire pressure estimation
    • 轮胎压力估计
    • US07240542B2
    • 2007-07-10
    • US10257598
    • 2001-04-12
    • Fredrik GustafssonMarcus DrevöNiclas Persson
    • Fredrik GustafssonMarcus DrevöNiclas Persson
    • G01M17/02G01L27/00
    • B60C23/062B60C23/061B60T8/1725B60T8/1755B60T2240/03B60T2250/06
    • A method, computer program product and apparatus for estimating the pneumatic pressure of a tire on a vehicle, comprising the steps of: receiving as an input a vehicle status sensor signal; estimating first parameter values of an adaptive filter based on a predetermined model on the vehicle status dependent on the vehicle status sensor signal; calculating, dependent on said first model parameter values, a first tire pressure indication value (δ) being dependent on and indicative of the pneumatic pressure of the tire. Specifically, the vehicle status signal may be an input a wheel angular velocity signal (1) and a lateral movement indication signal; the adaptive filter is based on a predetermined model on lateral vehicle dynamics dependent on the angular velocity of said wheel and the lateral movement of said vehicle.
    • 一种用于估计车辆上的轮胎的气压的方法,计算机程序产品和装置,包括以下步骤:接收车辆状态传感器信号作为输入; 基于取决于车辆状态传感器信号的车辆状态上的预定模型来估计自适应滤波器的第一参数值; 根据所述第一模型参数值计算依赖于并指示轮胎气动压力的第一轮胎压力指示值(delta)。 具体地,车辆状态信号可以是车轮角速度信号(1)和横向移动指示信号的输入; 自适应滤波器基于取决于所述车轮的角速度和所述车辆的横向运动的侧向车辆动力学的预定模型。
    • 9. 发明授权
    • Method and system for quality-based power control in cellular communications systems
    • 蜂窝通信系统中基于质量的功率控制的方法和系统
    • US06449462B1
    • 2002-09-10
    • US09031635
    • 1998-02-27
    • Fredrik GunnarssonJonas BlomFredrik Gustafsson
    • Fredrik GunnarssonJonas BlomFredrik Gustafsson
    • H04B1700
    • H04W52/248H04W52/06H04W52/223
    • A method and system for quality-based transmission power control in a cellular communications system are disclosed, whereby a network operator can specify the transmission quality requirements using a measurement that better reflects the actual quality perceived by the users. All transmitter power levels in the network can be controlled by identical power regulators, each of which can adapt to individual traffic situations in order to achieve the specified quality. For example, in a GSM frequency-hopping network, the FER together with the parameters estimated from the current traffic situation, are mapped onto a target C/I, which in turn, the power control algorithm strives to achieve. Consequently, the power regulators can adapt to the traffic situation experienced by each receiver.
    • 公开了一种用于蜂窝通信系统中的基于质量的传输功率控制的方法和系统,由此网络运营商可以使用更好地反映用户感知的实际质量的测量来指定传输质量要求。 网络中的所有发射机功率电平可以由相同的功率调节器控制,每个功率调节器可以适应各种业务情况,以达到指定的质量。 例如,在GSM跳频网络中,FER与从当前业务情况估计的参数一起被映射到目标C / I,而目标C / I又是功率控制算法努力实现的。 因此,功率调节器可以适应每个接收机所经历的交通状况。