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    • 32. 发明申请
    • Zero-crossing detector for receivers
    • 用于接收器的过零检测器
    • US20050201490A1
    • 2005-09-15
    • US10783063
    • 2004-02-20
    • Tobias ScholandPeter Jung
    • Tobias ScholandPeter Jung
    • H03D3/00
    • H03D3/006H03D2200/0064
    • A system and method of demodulating digital phase-modulated signals using zero-crossing detection at an appropriate intermediate frequency (IF). The input signal is filtered with an analog bandpass filter. The IF is chosen so that an appropriate linear digital filter applied to the output results in significantly improved Bit Error Rate (BER) of the recovered data signal. A microprocessor may be used to sample the incoming signal with its Timer Input. A Zero-Crossing-Detector detects the change of the sign of the signal with a one bit AD-converter. An effective low bit resolution, given by the timer frequency, is demanded. A resolution of only 2 to 5 bits for the time variation values of the zero-crossing intervals (spaces) δ is necessary for the digital filters to operate with high accuracy. The receiver can use either a linear or non-linear system model for its digital filter.
    • 一种使用适当中频(IF)的过零检测来解调数字相位调制信号的系统和方法。 输入信号用模拟带通滤波器滤波。 选择IF,使得应用于输出的适当的线性数字滤波器显着地改善了恢复的数据信号的误码率(BER)。 可以使用微处理器用其定时器输入采样输入信号。 零交叉检测器用一位AD转换器检测信号符号的变化。 需要由定时器频率给出的有效低位分辨率。 对于数字滤波器以高精度进行操作,对于过零间隔(空位)delta的时间变化值仅需要2至5位的分辨率是必需的。 接收机可以使用线性或非线性系统模型进行数字滤波。
    • 33. 发明授权
    • Coding method and coding apparatus for coding a serial data stream
    • 用于编码串行数据流的编码方法和编码装置
    • US06829742B1
    • 2004-12-07
    • US09979192
    • 2002-02-19
    • Peter JungJoerg Plechinger
    • Peter JungJoerg Plechinger
    • H03M1303
    • H04L1/0069H03M13/2957H04L1/007H04L1/0071
    • An initial data stream is coded using a first set of n coders to form n coded data streams, which are subsequently punctured by combining the n coded data streams with a first puncturing data field to form a first punctured data stream. The initial data stream is also interleaved using k interleaving circuits to produce k interleaved data streams, which are subsequently coded using a set of m coders to form m coded interleaved data streams. In addition, a second puncturing data field is interleaved to form an interleaved puncturing data field. The m coded interleaved data streams are subsequently punctured by combining the m coded interleaved data streams with the interleaved puncturing data field to form a second punctured data stream. The initial data stream, the first punctured data stream and the second punctured data stream are multiplexed to form a transmission data stream.
    • 使用第一组n个编码器对初始数据流进行编码,以形成n个编码数据流,随后通过将n个编码数据流与第一穿孔数据字段组合而形成第一穿孔数据流来进行打孔。 初始数据流也使用k个交织电路进行交织,以产生k个交错数据流,随后使用一组m个编码器编码以形成m个编码的交错数据流。 此外,第二删截数据字段被交织以形成交织的删截数据字段。 随后通过将m个经编码的交错数据流与交织的打孔数据字段组合来对m个编码的交错数据流进行穿孔,以形成第二穿孔数据流。 初始数据流,第一穿孔数据流和第二打孔数据流被多路复用以形成传输数据流。