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    • 6. 发明授权
    • Receiving apparatus and method of high speed digital data communication system
    • 高速数字数据通信系统接收装置及方法
    • US07327782B2
    • 2008-02-05
    • US10674383
    • 2003-10-01
    • Kyung-Ho Min
    • Kyung-Ho Min
    • H04B1/38H04L23/02
    • H04L27/0012
    • A receiving apparatus of a high speed digital data communication system includes: a mobile station modem (MSM) for judging a modulation method according to a data rate of a received signal and a position of a data pointer; a controller for controlling a control signal with respect to a position change of the data pointer on the basis of the information collected by the MSM; and a demodulator for determining a position of the data pointer according to the control signal outputted from the controller and demodulating a signal. By varying a position interval of data pointers according to a data rate, an error probability due to a noise can be reduced and a speech quality can be improved.
    • 高速数字数据通信系统的接收装置包括:移动台调制解调器(MSM),用于根据接收信号的数据速率和数据指针的位置判断调制方法; 控制器,用于根据由MSM收集的信息来控制关于数据指针的位置变化的控制信号; 以及解调器,用于根据从控制器输出的控制信号确定数据指针的位置并解调信号。 通过根据数据速率改变数据指针的位置间隔,可以减少由于噪声引起的错误概率,并且可以提高语音质量。
    • 9. 发明授权
    • Circuit for preventing signal quality degradation in CDMA system and method thereof
    • CDMA系统防止信号质量恶化的电路及其方法
    • US07489660B2
    • 2009-02-10
    • US10392927
    • 2003-03-21
    • Kyung-Ho Min
    • Kyung-Ho Min
    • H04Q7/00
    • H04B1/7097
    • A system for preventing signal quality degradation in a CDMA system includes a phase locking unit for controlling a phase of an oscillating frequency signal by controlling a voltage control oscillation unit, a mixer for mixing a frequency oscillation signal and a radio frequency signal received through an antenna, a demodulator for demodulating a signal output from the mixer, a signal detection unit for detecting a signal demodulated by the demodulator, a comparison unit for calculating a constellation and an error vector of the signal detected by the signal detection unit and comparing the constellation and error vector to a setup reference signal, and a controller means for controlling the phase locking unit, mixer and demodulator selectively in accordance with a comparison result of the comparison unit so as to make the constellation and error vector of the signal coincide with the reference signal. The system, thus, prevents the degradation of signal quality and call disconnection occurring during calling.
    • 用于防止CDMA系统中的信号质量恶化的系统包括:相位锁定单元,用于通过控制电压控制振荡单元来控制振荡频率信号的相位,用于混合频率振荡信号的混频器和通过天线接收的射频信号 用于解调从混频器输出的信号的解调器,用于检测由解调器解调的信号的信号检测单元,用于计算由信号检测单元检测的信号的星座图和误差矢量的比较单元, 误差矢量到设定参考信号,以及控制器装置,用于根据比较单元的比较结果有选择地控制相位锁定单元,混频器和解调器,以使信号的星座和误差矢量与参考信号一致 。 因此,该系统防止信号质量的恶化和呼叫期间发生呼叫断开。