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    • 3. 发明申请
    • Non-coherent synchronous direct-conversion receiving apparatus for compensating frequency offset
    • 用于补偿频偏的非相干同步直接转换接收装置
    • US20070127611A1
    • 2007-06-07
    • US11521739
    • 2006-09-15
    • Young-Jun ChongMin-Soo KangSung-Jin YouTae-Jin Chung
    • Young-Jun ChongMin-Soo KangSung-Jin YouTae-Jin Chung
    • H04L7/00H04L27/22
    • H04L27/0014H04B1/30H04L2027/003H04L2027/0055H04L2027/0067
    • A non-coherent synchronous direct-conversion receiving apparatus is provided. The apparatus includes a RF receiving unit, an I/Q ADC unit, and a digital signal processing unit for analyzing the digital signal received from the I/Q ADC unit to adjust a bandwidth of a variable receiving filtering unit according to the analyzing result, compensating a frequency offset to be correspondent with a symbol transmitting rate by extracting frequency offset information from the digital signal, compensating a frequency offset using the analyzing result, and applying a voltage corresponding to a sum of compensating values to the RF receiving unit. Therefore, the apparatus can compensate a frequency offset regardless of the magnitude of a frequency offset and performs a stable AFC operation through varying the bandwidth of a receiving filter by estimating the frequency offset with only data information, and adjusting a reference frequency twice through an interface signal.
    • 提供了非相干同步直接转换接收装置。 该装置包括RF接收单元,I / Q ADC单元和数字信号处理单元,用于分析从I / Q ADC单元接收的数字信号,以根据分析结果调整可变接收滤波单元的带宽, 通过从数字信号中提取频率偏移信息来补偿与符号发送速率相对应的频率偏移,使用分析结果补偿频率偏移,以及将对应于补偿值的和的电压施加到RF接收单元。 因此,无论频偏的大小如何,该装置可以补偿频率偏移,并且通过仅利用数据信息估计频偏,并通过接口调整参考频率两次来改变接收滤波器的带宽来执行稳定的AFC操作 信号。
    • 5. 发明授权
    • Non-coherent synchronous direct-conversion receiving apparatus for compensating frequency offset
    • 用于补偿频偏的非相干同步直接转换接收装置
    • US07664210B2
    • 2010-02-16
    • US11521739
    • 2006-09-15
    • Young-Jun ChongMin-Soo KangSung-Jin YouTae-Jin Chung
    • Young-Jun ChongMin-Soo KangSung-Jin YouTae-Jin Chung
    • H04L27/06H04L27/00H04B1/26H04B1/18
    • H04L27/0014H04B1/30H04L2027/003H04L2027/0055H04L2027/0067
    • A non-coherent synchronous direct-conversion receiving apparatus is provided. The apparatus includes a RF receiving unit, an I/Q ADC unit, and a digital signal processing unit for analyzing the digital signal received from the I/Q ADC unit to adjust a bandwidth of a variable receiving filtering unit according to the analyzing result, compensating a frequency offset to be correspondent with a symbol transmitting rate by extracting frequency offset information from the digital signal, compensating a frequency offset using the analyzing result, and applying a voltage corresponding to a sum of compensating values to the RF receiving unit. Therefore, the apparatus can compensate a frequency offset regardless of the magnitude of a frequency offset and performs a stable AFC operation through varying the bandwidth of a receiving filter by estimating the frequency offset with only data information, and adjusting a reference frequency twice through an interface signal.
    • 提供了非相干同步直接转换接收装置。 该装置包括RF接收单元,I / Q ADC单元和数字信号处理单元,用于分析从I / Q ADC单元接收的数字信号,以根据分析结果调整可变接收滤波单元的带宽, 通过从数字信号中提取频率偏移信息来补偿与符号发送速率相对应的频率偏移,使用分析结果补偿频率偏移,以及将对应于补偿值的和的电压施加到RF接收单元。 因此,无论频偏的大小如何,该装置可以补偿频率偏移,并且通过仅利用数据信息估计频偏,并通过接口调整参考频率两次来改变接收滤波器的带宽来执行稳定的AFC操作 信号。
    • 6. 发明申请
    • ENVELOPE DETECTOR
    • 环境检测器
    • US20130113551A1
    • 2013-05-09
    • US13613335
    • 2012-09-13
    • Tae-Jin CHUNG
    • Tae-Jin CHUNG
    • H03D1/00
    • H03D1/10H03D2200/0023H03D2200/0066H04L27/06
    • The envelope detector for detecting an envelope of a digital modulation signal in accordance with an embodiment of the present invention, includes: a mixer configured to receive the digital modulation signal and output a square signal squaring the digital modulation signal when being applied with bias voltage; a bias voltage applying unit configured to apply the bias voltage to the mixer; and a DC blocking capacitor configured to be connected to the mixer to block DC component included in the square signal. In accordance with the embodiment of the present invention, it is possible to provide the envelope detector having the simple structure while having the good receiving sensitivity and the wide dynamic range characteristics and detect the envelope of the modulated signal without transmitting the carrier signal in the transmitter and generating the separate signal in the receiver, thereby saving the costs consumed to implement the transceiver.
    • 根据本发明实施例的用于检测数字调制信号的包络的包络检测器包括:混合器,被配置为在施加偏置电压时接收数字调制信号并输出​​平方数字调制信号的平方信号; 偏置电压施加单元,被配置为将偏置电压施加到混合器; 以及分压电容器,被配置为连接到混频器以阻止包括在方波信号中的DC分量。 根据本发明的实施例,可以提供具有简单结构的包络检测器,同时具有良好的接收灵敏度和宽的动态范围特性,并且检测调制信号的包络而不在发射机中发送载波信号 并在接收机中产生单独的信号,从而节省实现收发器所消耗的成本。