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    • 77. 发明授权
    • Method and system for a second order input intercept point (IIP2) calibration scheme
    • 二阶输入截点(IIP2)校准方案的方法和系统
    • US08019309B2
    • 2011-09-13
    • US10976976
    • 2004-10-29
    • Hooman DarabiBrima IbrahimHea Joung Kim
    • Hooman DarabiBrima IbrahimHea Joung Kim
    • H04B1/10
    • H04L25/061H03D3/008H04B1/30H04L25/0272H04L25/0294H04L25/0296
    • In RF transceivers, a method and system for a second order input intercept point (IIP2) calibration scheme are provided. Transceiver calibration schemes to compensate for DC offsets produced by interfering signals may be performed during production testing or field operation. During production testing, an external source may inject a blocker signal that produces DC offsets in the receiver portion of the transceiver. A transceiver switch may be set to receive mode in this scheme. During field operation, a power amplifier in the transmitter portion of the transceiver may inject the blocker signal. In this scheme, the switch may be set to transmit mode and the DC offsets are produced by the portion of the injected blocker signal that leaks through the switch. In both schemes, a DC offset sensor detects DC offsets in the I/Q signal paths and may determine compensation currents which may be applied by injection circuits.
    • 在RF收发器中,提供了用于二阶输入截点(IIP2)校准方案的方法和系统。 可以在生产测试或现场操作期间执行用于补偿由干扰信号产生的直流偏移的收发器校准方案。 在生产测试期间,外部源可以注入在收发器的接收器部分中产生DC偏移的阻塞信号。 可以在该方案中将收发器开关设置为接收模式。 在场操作期间,收发器的发射器部分中的功率放大器可以注入阻塞信号。 在该方案中,开关可以被设置为发送模式,并且DC偏移由注入的阻塞信号的部分通过开关泄漏产生。 在两种方案中,DC偏移传感器检测I / Q信号路径中的直流偏移,并且可以确定可由注入电路施加的补偿电流。
    • 80. 发明申请
    • METHOD AND SYSTEM FOR BLUETOOTH LOW POWER LINK LAYER CONNECTION SETUP
    • BLUETOOTH低功率连接层连接设置方法与系统
    • US20100317289A1
    • 2010-12-16
    • US12483958
    • 2009-06-12
    • Prasanna DesaiBrima Ibrahim
    • Prasanna DesaiBrima Ibrahim
    • H04B7/00
    • H04B17/318H04W24/10H04W48/08H04W52/322H04W76/10H04W84/18
    • A mobile device such as a Bluetooth low energy (BLE) device detects out-of-band blocking signals and manages packet transmission in associated BLE link layer connections based on the detected out-of-band blocking signals. The BLE device is operable to measure out-of-band RSSI to detect out-of-band transmission interferences. The BLE device compares the measured out-of-band RSSI with an out-of-band energy profile such as a LTE energy profile or a WiMAX energy profile to determine the out-of-band blocking signals indicating cadence or periodic out-of-band traffic activities. A remote BLE deice (advertiser) aperiodically or periodically transmits an advertising packet to the BLE device for a specific link layer connection. If not connected within a determined time period, the remote BLE device (advertiser) reduces transmission power for transmitting the advertising packet. The BLE device receives the advertising packet and sends a connection request packet to the remote BLE device (advertiser).
    • 诸如蓝牙低能量(BLE)设备的移动设备基于检测到的带外阻断信号来检测带外阻塞信号并管理相关联的BLE链路层连接中的分组传输。 BLE设备可操作以测量带外RSSI以检测带外传输干扰。 BLE设备将所测量的带外RSSI与诸如LTE能量曲线或WiMAX能量曲线之类的带外能量曲线进行比较,以确定指示节奏或周期性的频带外阻塞信号, 乐队交通活动。 远程BLE设备(广告商)不定期地或周期地向BLE设备发送广告分组用于特定的链路层连接。 如果在确定的时间段内没有连接,则远程BLE设备(广告商)降低了用于发送广告分组的传输功率。 BLE设备接收广告分组并向远程BLE设备(广告商)发送连接请求分组。