公开(公告)号：US20050228604A1

公开(公告)日：2005-10-13

申请号：US11034676

申请日：2005-01-13

Applicant: Joshua Niedzwiecki ,  Matthew Taylor ,  Mark Lande

Inventor： Joshua Niedzwiecki ,  Matthew Taylor ,  Mark Lande

IPC: G01N33/48 ,  G01N33/50 ,  G01R23/16 ,  G01R27/04 ,  G01R27/32 ,  G01R35/00 ,  G06F19/00 ,  H04B3/46 ,  H04B3/56

CPC classification number: G01R31/31717 ,  G01R27/04 ,  G01R27/32 ,  G01R31/11 ,  G01R35/005 ,  H04B3/46 ,  H04B3/493 ,  H04B3/56 ,  H04B2203/5425 ,  H04B2203/5483 ,  H04B2203/5491 ,  H04B2203/5495

Abstract: A calibration system is provided for calibrating frequency domain reflectometers in the field by using both the scattering parameters of the multi-port junction determined at the factory and changing the offset and gain terms used in generating a complex reflection coefficient by using internal calibrated loads so that heavy, cumbersome external calibrated transmission lines are not required. In one embodiment the internal calibrated loads include RLC circuits and in another embodiment the internal calibrated loads include attenuators. Further, retesting or recalibration does not necessitate reconnecting the cable under test, which may remain connected to the reflectometer's test port throughout the procedure.

公开(公告)号：US07254511B2

公开(公告)日：2007-08-07

申请号：US11110264

申请日：2005-04-20

Applicant: Joshua D. Niedzwiecki ,  Matthew A. Taylor ,  Mark Lande

Inventor： Joshua D. Niedzwiecki ,  Matthew A. Taylor ,  Mark Lande

IPC: G06F19/00 ,  G01R35/00

CPC classification number: H04B3/46 ,  G01R27/04 ,  G01R35/005

Abstract: A calibration system is provided for calibrating frequency domain reflectometers in the field by using both the scattering parameters of the multi-port junction determined at the factory and changing the offset and gain terms used in generating a complex reflection coefficient by using internal calibrated loads so that heavy, cumbersome external calibrated transmission lines are not required. In one embodiment the internal calibrated loads include RLC circuits and in another embodiment the internal calibrated loads include attenuators. Further, retesting or recalibration does not necessitate reconnecting the cable under test, which may remain connected to the reflectometer's test port throughout the procedure.

Abstract translation: 提供了一种校准系统，用于通过使用出厂时确定的多端口结的散射参数和通过使用内部校准负载来改变用于产生复反射系数的偏移和增益项来校准现场的频域反射计，使得 不需要繁重繁琐的外部校准传输线。 在一个实施例中，内部校准负载包括RLC电路，在另​​一个实施例中，内部校准负载包括衰减器。 此外，重新测试或重新校准不需要重新连接被测电缆，这可能在整个过程中保持连接到反射计的测试端口。

公开(公告)号：US20050234662A1

公开(公告)日：2005-10-20

申请号：US11110264

申请日：2005-04-20

Applicant: Joshua Niedzwiecki ,  Matthew Taylor ,  Mark Lande

Inventor： Joshua Niedzwiecki ,  Matthew Taylor ,  Mark Lande

IPC: G01R27/04 ,  G01R35/00 ,  G06F19/00 ,  H04B3/46

CPC classification number: H04B3/46 ,  G01R27/04 ,  G01R35/005

Abstract: A calibration system is provided for calibrating frequency domain reflectometers in the field by using both the scattering parameters of the multi-port junction determined at the factory and changing the offset and gain terms used in generating a complex reflection coefficient by using internal calibrated loads so that heavy, cumbersome external calibrated transmission lines are not required. In one embodiment the internal calibrated loads include RLC circuits and in another embodiment the internal calibrated loads include attenuators. Further, retesting or recalibration does not necessitate reconnecting the cable under test, which may remain connected to the reflectometer's test port throughout the procedure.

Abstract translation: 提供了一种校准系统，用于通过使用出厂时确定的多端口结的散射参数和通过使用内部校准负载来改变用于产生复反射系数的偏移和增益项来校准现场的频域反射计，使得 不需要繁重繁琐的外部校准传输线。 在一个实施例中，内部校准负载包括RLC电路，在另​​一个实施例中，内部校准负载包括衰减器。 此外，重新测试或重新校准不需要重新连接被测电缆，这可能在整个过程中保持连接到反射计的测试端口。

公开(公告)号：US07593492B1

公开(公告)日：2009-09-22

申请号：US11532125

申请日：2006-09-15

Applicant: Mark Lande

Inventor： Mark Lande

IPC: H03D1/04

CPC classification number: H04B1/7103

Abstract: A high quality real-time Turbo-Mud processing system that chooses between a high complexity multi-user detectors that results in better estimates of the bit streams and computationally low linear-based-MUD/Turbo-MUD at each MUD window in each Turbo Iteration. In one embodiment this technique optimizes both the BER and the computational complexity of the receiver by using low complexity MUDs to reduce the number of symbols that the high complexity MUDs need to process. The present invention also provides an efficient means of estimating symbols transmitted in a multi-user environment in overloaded or super-saturated conditions.

Abstract translation: 高质量的实时Turbo-Mud处理系统，在高复杂度的多用户检测器之间进行选择，在每个Turbo迭代的每个MUD窗口中，可以更好地估计位流和基于线性的MUD / Turbo-MUD 。 在一个实施例中，该技术通过使用低复杂度MUD来优化接收机的BER和计算复杂度，以减少高复杂性MUD需要处理的符号数量。 本发明还提供了一种估计在多用户环境中在过载或超饱和条件下发送的符号的有效手段。