Radio transmission timing calibrator
    1.
    发明授权
    Radio transmission timing calibrator 有权
    无线传输定时校准器

    公开(公告)号:US06829229B1

    公开(公告)日:2004-12-07

    申请号:US09570129

    申请日:2000-05-12

    IPC分类号: H04J7500

    CPC分类号: H04B1/406 H04J3/0682

    摘要: A signal calibrator (14) for a software-defined communications device (10) that enables device communications signals to be transmitted in a manner that maximally decouples the calibrator (14) from the device hardware (40), and that simplifies the design and reduces the cost of the communications device (10). The calibrator (14) includes a software modulator (16) for generating a nonstop stream of samples including zero valued samples and non-zero valued waveform bursts, and a software demodulator (18) connected to the software modulator (16) via a closed loop feedback path (20) that receives a nonstop stream of samples. The non-zero valued samples create radio emissions. The software demodulator (18) is for determining a timing error of the transmission sample and for transmitting a timing error correction value to the software modulator (16) via the closed loop feedback path (20). The timing error correction value enables the software modulator (16) to adjust a transmission time of a subsequent waveform burst to compensate for both unknown hardware delays and RF signal propagation delays.

    摘要翻译: 一种用于软件定义的通信设备(10)的信号校准器(14),其使设备通信信号能够以最大程度地将校准器(14)与设备硬件(40)去耦的方式传输,并且简化了设计并减少了 通信设备(10)的成本。 校准器(14)包括软件调制器(16),用于产生包括零值样本和非零值波形突发的不间断样本流,以及软件解调器(18),其通过闭环连接到软件调制器(16) 反馈路径(20),其接收不间断的样本流。 非零值样本产生无线电发射。 软件解调器(18)用于确定发送样本的定时误差,并且用于经由闭环反馈路径(20)向软件调制器(16)发送定时误差校正值。 定时误差校正值使得软件调制器(16)能够调整后续波形脉冲串的传输时间以补偿未知硬件延迟和RF信号传播延迟。