公开(公告)号：US20050270231A1

公开(公告)日：2005-12-08

申请号：US10860268

申请日：2004-06-03

Applicant: James Small

Inventor： James Small

IPC: G01S7/28 ,  G01S7/282 ,  G01S7/285 ,  G01S13/02

CPC classification number: G01S7/285 ,  G01S7/024 ,  G01S7/282 ,  G01S13/0209 ,  G01S2007/2886

Abstract: A general purpose system and method for transmitting and coherently detecting UWB waveforms is predicated on the formation of conjugate pair of UWB waveforms. The in-phase and conjugate quadrature waveforms are orthogonal to each other and have the same power spectrum so that when squared and added they sum to the modulation envelope of the waveforms. By defining the waveform pair in this manner, a relatively simple and inexpensive transceiver can be used to transmit and receive the waveforms and yet preserve maximum range resolution and recover all possible energy in the returned waveforms. The transceiver transmits the in-phase UWB waveform and the conjugate quadrature UWB waveform with either a known time delay or orthogonal polarization relation. The time delay may be varied to suppress aliased return signals. A general purpose receiver detects the return waveforms, aligns them and then processes the waveforms using conventional techniques to extract target information including amplitude, phase, motion, imaging, etc. The transmission and detection of the conjugate waveforms is easily incorporated into a phased array system that comprises a plurality of transceivers.

Abstract translation: 用于发送和相干检测UWB波形的通用系统和方法基于UWB波形的共轭对的形成。 同相和共轭正交波形彼此正交并且具有相同的功率谱，使得当平方和相加时，它们与波形的调制包络相加。 通过以这种方式定义波形对，可以使用相对简单和便宜的收发器来发送和接收波形，并且保持最大范围分辨率并恢复返回波形中的所有可能的能量。 收发器以已知的时间延迟或正交极化关系发送同相UWB波形和共轭正交UWB波形。 可以改变时间延迟以抑制混叠返回信号。 通用接收器检测返回波形，对齐它们，然后使用常规技术处理波形，以提取包括幅度，相位，运动，成像等的目标信息。共轭波形的传输和检测容易地并入相控阵列系统 其包括多个收发器。