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    • 1. 发明申请
    • IMPROVED FREQUENCY CHANGER CIRCUITS
    • 改进的变频器电路
    • WO2008064262A2
    • 2008-05-29
    • PCT/US2007/085296
    • 2007-11-20
    • QUALCOMM INCORPORATEDFILIPOVIC, Daniel, F.KANG, Inyup
    • FILIPOVIC, Daniel, F.KANG, Inyup
    • H04B15/00H04B1/109
    • In accordance with one aspect of the disclosure, apparatus are provided. A filter is provided to receive from an antenna a receive signal of a given type and a low noise amplifier is provided to amplify the received signal. A translator down translates the receive signal carried at a radio frequency to be carried at an intermediate frequency. An I/Q channel separator is provided to separate the receive signal carried at the intermediate frequency into an analog in-phase (I) signal in an I channel and an analog quadrature-phase (Q) in a Q channel. An analog-to-digital (A/D) converter is provided to respectively convert the I signal and the Q signal to digital domain representations of the I signal and the Q signal. An intermodulation (IM) distortion avoider is provided to avoid IM distortion in the receive signal. The IM distortion avoider includes a carrier frequency exchanger to exchange an IM carrier frequency of IM distortion contained in the receive signal with a carrier frequency of the receive signal.
    • 根据本公开的一个方面,提供了一种装置。 提供滤波器以从天线接收给定类型的接收信号,并且提供低噪声放大器来放大接收到的信号。 翻译器将在射频下携带的接收信号转换为中频。 提供I / Q信道分离器以将在中频处承载的接收信号分离成I信道中的模拟同相(I)信号和Q信道中的模拟正交相位(Q)。 提供模数(A / D)转换器以分别将I信号和Q信号转换为I信号和Q信号的数字域表示。 提供互调(IM)失真避免器以避免接收信号中的IM失真。 IM失真避免器包括载波频率交换器,以将接收信号中包含的IM失真的IM载波频率与接收信号的载波频率进行交换。
    • 3. 发明申请
    • INTERFERENCE DETECTION AND MITIGATION
    • 干扰检测和缓解
    • WO2009088788A1
    • 2009-07-16
    • PCT/US2008/088261
    • 2008-12-23
    • QUALCOMM INCORPORATEDKOMNINAKIS, ChristosFILIPOVIC, Daniel, F.
    • KOMNINAKIS, ChristosFILIPOVIC, Daniel, F.
    • H04B1/10H04B1/52
    • 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。
    • 6. 发明申请
    • INTERMODULATION DISTORTION DETECTION AND MITIGATION
    • 互变异常检测和缓解
    • WO2008021815A1
    • 2008-02-21
    • PCT/US2007/075337
    • 2007-08-07
    • QUALCOMM INCORPORATEDFILIPOVIC, Daniel, F.KOMNINAKIS, Christos
    • FILIPOVIC, Daniel, F.KOMNINAKIS, Christos
    • H04B1/10H04B1/12
    • H04B1/109H04B1/123H04B1/525
    • Techniques for detecting and mitigating intermodulation distortion (IMD) are described. A device (e.g., a cellular phone) obtains digital intermodulation distortion and digitally determines intermodulation distortion in an input signal based on the digital intermodulation distortion. The device may correlate the digital intermodulation distortion with the input signal and determine intermodulation distortion in the input 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 intermodulation distortion in the input signal. Alternatively or additionally, the device may condition the digital intermodulation distortion to obtain conditioned intermodulation distortion matching intermodulation distortion in the input signal and may then subtract the conditioned intermodulation distortion from the input signal.
    • 描述了用于检测和减轻互调失真(IMD)的技术。 设备(例如,蜂窝电话)基于数字互调失真获得数字互调失真并且数字地确定输入信号中的互调失真。 该装置可以将数字互调失真与输入信号相关联,并且基于相关结果确定输入信号中的互调失真。 该装置可以基于检测到的输入信号中的互调失真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。 或者或另外,设备可以调节数字互调失真以获得输入信号中的调制互调失真匹配互调失真,然后可以从输入信号中减去调节的互调失真。
    • 7. 发明申请
    • ADAPTIVE MULTI-CHANNEL MODEM
    • 自适应多信道调制解调器
    • WO2007002414A2
    • 2007-01-04
    • PCT/US2006/024499
    • 2006-06-23
    • QUALCOMM INCORPORATEDFILIPOVIC, Daniel, F.
    • FILIPOVIC, Daniel, F.
    • H04B1/71H04B1/0035H04B1/0071H04B1/406
    • An adaptive multi-channel (AMC) modem that can receive one or multiple spread spectrum signals simultaneously includes an adjustable filter, a ΔΣ ADC, and a digital processor. The adjustable filter filters an input signal with an adjustable bandwidth and provides an output signal comprised of a selected number of spread spectrum signals. The ΔΣ ADC digitizes the output signal and provides data samples. The sampling rate and/or the reference voltage of the ΔΣ ADC may be varied to obtain the desired performance. The digital processor processes the data samples for each spread spectrum signal to recover data sent in that signal. A controller ascertains the operating conditions (e.g., the desired signal level, the undesired signal level, and so on) and selects the number of spread spectrum signals to receive based on the operating conditions, user requirements, and possibly other factors.
    • 可同时接收一个或多个扩频信号的自适应多信道(AMC)调制解调器包括可调滤波器,ΔΣADC和数字处理器。 可调滤波器以可调整的带宽对输入信号进行滤波,并提供由选定数量的扩频信号组成的输出信号。 ΔΣADC将输出信号数字化并提供数据采样。 ΔΣADC的采样速率和/或参考电压可以变化以获得期望的性能。 数字处理器处理每个扩频信号的数据采样以恢复在该信号中发送的数据。 控制器确定操作条件(例如,期望的信号电平,非期望的信号电平等),并基于操作条件,用户要求和可能的其他因素选择要接收的扩频信号的数量。
    • 10. 发明申请
    • CONVERSION OF MULTIPLE ANALOG SIGNALS IN AN ANALOG TO DIGITAL CONVERTER
    • 多模式信号在数字转换器中的转换
    • WO2007095475A1
    • 2007-08-23
    • PCT/US2007/061953
    • 2007-02-09
    • QUALCOMM IncorporatedFILIPOVIC, Daniel, F.
    • FILIPOVIC, Daniel, F.
    • H03M1/12H03M3/00
    • H03M3/472H03M1/122
    • A multiple analog signal converter (100) simultaneously converts multiple analog signals (104,106) to digital signals (112, 114) using a single analog to digital converter (ADC) 102. A first analog signal (104) at a first center frequency and a second analog signal (106) at a second center frequency are processed by the ADC (102) to generate a composite digital signal (110) comprising a first digital signal (112) corresponding to the first analog signal (104) and a second digital signal (114) corresponding to the second analog signal (106). The composite digital signal (110) is digitally frequency shifted to recover the second digital signal (106). The first digital signal (104) is recovered by digitally filtering the composite digital signal (110). In some circumstances, a first radio frequency (RF) signal (118) and a second RF signal (122) are frequency shifted to generate the first analog signal (104) and second analog signal (106).
    • 多模拟信号转换器(100)使用单个模数转换器(ADC)102同时将多个模拟信号(104,106)转换为数字信号(112,114)。第一中心频率的第一模拟信号(104) 在第二中心频率处的第二模拟信号(106)由ADC(102)处理以产生包括对应于第一模拟信号(104)的第一数字信号(112)和第二数字信号(104)的复合数字信号 (114)对应于第二模拟信号(106)。 复合数字信号(110)被数字频移以恢复第二数字信号(106)。 通过数字滤波复合数字信号(110)来恢复第一数字信号(104)。 在一些情况下,对第一射频(RF)信号(118)和第二RF信号(122)进行频移,以产生第一模拟信号(104)和第二模拟信号(106)。