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    • 3. 发明授权
    • Frequency spur detection and suppression
    • 频率刺激检测和抑制
    • US08254855B2
    • 2012-08-28
    • US12116539
    • 2008-05-07
    • Daniel Fred FilipovicHelena Deirdre O'SheaChristos KomninakisJifeng Geng
    • Daniel Fred FilipovicHelena Deirdre O'SheaChristos KomninakisJifeng Geng
    • H04B1/04H04B1/10
    • H04B1/1036H04B1/7107
    • Techniques for identifying and suppressing frequency spurs in a signal are disclosed. In an embodiment, an incoming signal is rotated by a frequency related to a spur frequency, and an estimate of the content of the rotated signal is derived. The estimate may be subtracted from the rotated incoming signal, and the result de-rotated by the spur frequency. In an embodiment, the incoming signal may be rotated such that the spur is centered at DC. In an alternative embodiment, the estimate may be de-rotated before being subtracted from the original incoming signal. Techniques for addressing multiple spurs using serial and parallel architectures are disclosed. Further disclosed are techniques for searching for the presence of spurs in an incoming signal, and tracking spur frequencies over time.
    • 公开了用于识别和抑制信号中的频率杂散的技术。 在一个实施例中,输入信号被旋转与杂波频率相关的频率,并且导出旋转信号的内容的估计。 可以从旋转的输入信号中减去估计值,并且结果由杂散频率去旋转。 在一个实施例中,输入信号可以旋转,使得支线以DC为中心。 在替代实施例中,估计可以在从原始输入信号中减去之前被去转动。 公开了使用串行和并行架构寻址多个杂散的技术。 进一步公开的是用于在输入信号中搜索马刺的存在的技术,以及随时间跟踪刺激频率。
    • 4. 发明授权
    • Method and apparatus for generating or utilizing one or more cycle-swallowed clock signals
    • 用于产生或利用一个或多个经周期吞咽的时钟信号的方法和装置
    • US08132041B2
    • 2012-03-06
    • US12053433
    • 2008-03-21
    • Christos KomninakisMing-Chieh Kuo
    • Christos KomninakisMing-Chieh Kuo
    • G06F1/00G06F1/04G06F1/12G06F5/06G06F11/00H04L7/00H04L25/40
    • H03L7/00
    • An electronic device is provided for generating or utilizing one or more cycle-swallowed clock signals derived based on one or more first clock signals. The device includes a module configured to receive a first clock signal having a first frequency. The module is configured to generate a second clock signal having a second frequency and configured to swallow one or more clock cycles of the first clock signal in generating the second clock signal. The first clock signal has even cycles, and the second clock signal has uneven cycles. The first frequency is greater than the second frequency. The module may include a cycle-swallowing counter. A method and a computer-readable medium are also provided.
    • 提供一种电子设备,用于产生或利用一个或多个基于一个或多个第一时钟信号导出的周期吞咽时钟信号。 该设备包括被配置为接收具有第一频率的第一时钟信号的模块。 该模块被配置为产生具有第二频率的第二时钟信号,并且被配置为在生成第二时钟信号时吞咽第一时钟信号的一个或多个时钟周期。 第一个时钟信号具有偶数周期,第二个时钟信号具有不均匀的周期。 第一个频率大于第二个频率。 模块可以包括循环吞咽计数器。 还提供了一种方法和计算机可读介质。
    • 5. 发明申请
    • Baseband transmitter self-jamming and intermodulation cancellation device
    • 基带发射机自动干扰和互调消除装置
    • US20070184782A1
    • 2007-08-09
    • US11346888
    • 2006-02-03
    • Gurkanwal SahotaChristos Komninakis
    • Gurkanwal SahotaChristos Komninakis
    • H04B1/00
    • H04B1/525H04B1/10
    • Some embodiments provide a method, system, and apparatus for interference cancellation at the baseband of a receiver. A wireless communication device, having a transmitter and receiver, is provided with an adaptive circuit that cancels interference caused by transmit signals (or other signals) leaked or bled onto the receiver at baseband to facilitate detection of a received signal of interest. Some implementations provide for a circuit that approximately reconstructs the second and third order components caused by the nonlinear response of the down-conversion chain of a receiver. This reconstructed signal is then subtracted from the composite received signal to obtain a received signal of interest.
    • 一些实施例提供了用于接收机基带处的干扰消除的方法,系统和装置。 具有发射机和接收机的无线通信设备设置有自适应电路,该自适应电路消除由基带泄露或流出到接收机上的发射信号(或其他信号)引起的干扰,以便于检测到所接收到的感兴趣的信号。 一些实施方案提供了近似重建由接收机的下变换链的非线性响应引起的第二和第三阶分量的电路。 然后从复合接收信号中减去该重建的信号,以获得感兴趣的接收信号。
    • 7. 发明授权
    • I-Q mismatch compensation
    • I-Q不匹配补偿
    • US08260229B2
    • 2012-09-04
    • US12468995
    • 2009-05-20
    • Mariam MotamedDaniel F. FilipovicChristos KomninakisChun-Hao HsuChengjin Zhang
    • Mariam MotamedDaniel F. FilipovicChristos KomninakisChun-Hao HsuChengjin Zhang
    • H04B17/02
    • H03D3/009
    • Techniques for compensating for I-Q mismatch in a communications receiver. In an exemplary embodiment, incoming I and Q samples are adjusted by multiplying with certain compensation coefficients to generate mismatch-compensated I and Q samples. The compensation coefficients may themselves be calculated and iteratively refined from the mismatch-compensated I and Q samples. Further techniques for partitioning the adjustment and estimation functions among computational hardware are disclosed. In an exemplary embodiment, estimation may be restricted to only those segments of the incoming I and Q samples that fulfill certain conditions, e.g., segments of the incoming I and Q samples known to be statistically uncorrelated and/or to have equal average energy.
    • 用于补偿通信接收机中的I-Q不匹配的技术。 在示例性实施例中,通过与某些补偿系数相乘来调整输入I和Q样本,以产生失配补偿的I和Q样本。 补偿系数本身可以从不匹配补偿的I和Q样本中计算和迭代地改进。 公开了用于在计算硬件之间划分调整和估计功能的其它技术。 在示例性实施例中,估计可以仅限于满足某些条件的输入I和Q样本的那些段,例如已知在统计学上不相关和/或具有相等平均能量的输入I和Q样本的段。
    • 9. 发明申请
    • INTERFERENCE DETECTION AND MITIGATION
    • 干扰检测和缓解
    • US20090086863A1
    • 2009-04-02
    • US12330798
    • 2008-12-09
    • Christos KomninakisDaniel F. Filipovic
    • Christos KomninakisDaniel F. Filipovic
    • H03D1/04
    • H04B1/10H04B1/109H04B1/525
    • Techniques for detecting and mitigating interference are described. A device (e.g., a cellular phone) senses interference levels and digitally reconstructs the expected interference in the received signal. The device may correlate the reconstructed interference with the received signal and determine interference in the received signal based on correlation results. The device may adjust the operation of one or more circuit blocks (e.g., a mixer, an LNA, etc.) in a receiver based on the detected interference in the received signal. Alternatively or additionally, the device may condition the digital interference to obtain conditioned reconstructed interference matching the interference in the received signal and may then subtract the conditioned interference from the received signal.
    • 描述了用于检测和减轻干扰的技术。 设备(例如,蜂窝电话)感测干扰电平并且数字地重构接收信号中的预期干扰。 该装置可以将重建的干扰与接收到的信号相关联,并且基于相关结果确定接收信号中的干扰。 该装置可以基于接收信号中检测到的干扰来调整接收机中的一个或多个电路块(例如,混频器,LNA等)的操作。 替代地或附加地,设备可以调节数字干扰以获得​​与接收信号中的干扰匹配的经调整的重构干扰,然后可以从接收到的信号中减去经调节的干扰。