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    • 53. 发明授权
    • Translational loop transmitter architecture employing channel power ratio measurements for modulation accuracy calibration
    • 平移环路发射机架构采用信道功率比测量进行调制精度校准
    • US07499680B2
    • 2009-03-03
    • US11078148
    • 2005-03-11
    • Hong ShiHenrik Tholstrup Jensen
    • Hong ShiHenrik Tholstrup Jensen
    • H04B17/00
    • H04B1/0475
    • A Radio Frequency RF transmitter includes a translational loop architecture that supports non-constant envelope modulation types and includes by adjusting the envelope of the translational loop at the translational loop output. The RF transmitter includes an Intermediate Frequency (IF) modulator, a translational loop, an envelope time delay adjust block, an envelope adjust block, and a time delay calibration block. The IF modulator receives a modulated baseband signal and produces a modulated IF signal having a non-constant envelope. The translational loop receives the modulated IF signal and produces a modulated RF signal having a constant envelope. The envelope time delay adjust block receives an envelope signal corresponding to the original modulated signal and produces a time delayed envelope signal based upon a time delay control signal. The envelope adjust block adjusts the modulated RF signal based upon the time delayed envelope signal to produce an envelope adjusted modulated RF signal. Finally, the time delay calibration block receives the envelope adjusted modulated RF signal and produces the time delay control signal.
    • 射频RF发射机包括支持非恒定包络调制类型的平移环路架构,并且包括通过调整平移环路输出端的平移环路的包络。 RF发射机包括中频(IF)调制器,平移回路,包络时间延迟调整块,包络调整块和时间延迟校准块。 IF调制器接收调制的基带信号并产生具有非恒定包络的调制IF信号。 平移环路接收调制的IF信号并产生具有恒定包络线的调制RF信号。 包络时间延迟调整块接收对应于原始调制信号的包络信号,并且基于时间延迟控制信号产生时间延迟包络信号。 信封调整块基于时间延迟的包络信号来调整调制的RF信号,以产生包络调制的调制的RF信号。 最后,延时校准块接收包络调制的调制RF信号并产生延时控制信号。
    • 56. 发明申请
    • LNA gain adjustment in an RF receiver to compensate for intermodulation interference
    • LNA增益调整在RF接收机中以补偿互调干扰
    • US20070010224A1
    • 2007-01-11
    • US11523332
    • 2006-09-19
    • Hong Shi
    • Hong Shi
    • H04B17/00H04B1/06
    • H03G3/3068H03F1/32H03F2200/294H03F2200/372H03G3/3052H03G3/3078H04B1/109
    • A Radio Frequency (RF) receiver includes a low noise amplifier (LNA) and a mixer coupled to the output of the LNA. The gain of the LNA is adjusted to maximize signal-to-noise ratio of the mixer and to force the mixer to operate well within its linear region when an intermodulation interference component is present. The RF receiver includes a first received signal strength indicator (RSSI_A) coupled to the output of the mixer that measures the strength of the wideband signal at that point. A second received signal strength indicator (RSSI_B) couples after the BPF and measures the strength of the narrowband signal. The LNA gain is set based upon these signal strengths. By altering the gain of the LNA by one step and measuring the difference between a prior RSSI_B reading and a subsequent RSSI_B′ reading will indicate whether intermodulation interference is present.
    • 射频(RF)接收机包括低噪声放大器(LNA)和耦合到LNA的输出的混频器。 调整LNA的增益以使混频器的信噪比最大化,并且当存在互调干涉分量时,迫使混频器在其线性区域内良好地运行。 RF接收机包括耦合到混频器的输出的第一接收信号强度指示符(RSSI_A),该信号强度指示器测量在该点处的宽带信号的强度。 第二接收信号强度指示符(RSSI_B)在BPF之后耦合并测量窄带信号的强度。 基于这些信号强度设置LNA增益。 通过将LNA的增益改变一步并测量先前的RSSI_B读数与随后的RSSI_B读数之间的差异将指示是否存在互调干扰。
    • 58. 发明申请
    • Radio frequency integrated circuit
    • US20060035595A1
    • 2006-02-16
    • US11223170
    • 2005-09-09
    • Hong Shi
    • Hong Shi
    • H04B1/38
    • H04B1/406H03L7/18
    • A radio frequency (RF) integrated circuit (IC) includes a local oscillation module, analog radio receiver, analog radio transmitter, digital receiver module, digital transmitter module, and digital optimization module. The local oscillation module is operably coupled to produce at least one local oscillation. The analog radio receiver is operably coupled to directly convert inbound RF signals into inbound low intermediate frequency signals based on the local oscillation. The digital receiver module is operably coupled to process the inbound low IF signals in accordance with one of a plurality of radio transceiving standards to produce inbound data. The digital transmitter is operably coupled to produce an outbound low intermediate frequency signal by processing outbound data in accordance with the one of the plurality of radio transceiving standards. The analog radio transmitter is operably coupled to directly convert the outbound low IF signals into outbound RF signals based on the local oscillation. The digital optimization module is operably coupled to the local oscillation module, the analog radio receiver and/or the analog radio transmitter to optimize performance of at least one aspect of the local oscillation module, the analog radio receiver and/or the analog radio transmitter for the given radio transceiving standard being implemented.
    • 60. 发明授权
    • Translational loop transmitter architecture employing channel power ratio measurements for modulation accuracy calibration
    • 平移环路发射机架构采用信道功率比测量进行调制精度校准
    • US06882831B2
    • 2005-04-19
    • US10066843
    • 2002-02-04
    • Hong ShiHenrik Tholstrup Jensen
    • Hong ShiHenrik Tholstrup Jensen
    • H04B1/04H01Q11/12
    • H04B1/0475
    • A Radio Frequency RF transmitter includes a translational loop architecture that supports non-constant envelope modulation types and includes by adjusting the envelope of the translational loop at the translational loop output. The RF transmitter includes an Intermediate Frequency (IF) modulator, a translational loop, an envelope time delay adjust block, an envelope adjust block, and a time delay calibration block. The IF modulator receives a modulated baseband signal and produces a modulated IF signal having a non-constant envelope. The translational loop receives the modulated IF signal and produces a modulated RF signal having a constant envelope. The envelope time delay adjust block receives an envelope signal corresponding to the original modulated signal and produces a time delayed envelope signal based upon a time delay control signal. The envelope adjust block adjusts the modulated RF signal based upon the time delayed envelope signal to produce an envelope adjusted modulated RF signal. Finally, the time delay calibration block receives the envelope adjusted modulated RF signal and produces the time delay control signal.
    • 射频RF发射机包括支持非恒定包络调制类型的平移环路架构,并且包括通过调整平移环路输出端的平移环路的包络。 RF发射机包括中频(IF)调制器,平移回路,包络时间延迟调整块,包络调整块和时间延迟校准块。 IF调制器接收调制的基带信号并产生具有非恒定包络的调制IF信号。 平移环路接收调制的IF信号并产生具有恒定包络线的调制RF信号。 包络时间延迟调整块接收对应于原始调制信号的包络信号,并且基于时间延迟控制信号产生时间延迟包络信号。 信封调整块基于时间延迟的包络信号来调整调制的RF信号,以产生包络调制的调制的RF信号。 最后,延时校准块接收包络调制的调制RF信号并产生延时控制信号。