Invention Grant
- Patent Title: Multipath delay calculator for a decision feedback equalizer
- Patent Title (中): 用于判决反馈均衡器的多径延迟计算器
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Application No.: US13658721Application Date: 2012-10-23
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Publication No.: US08724690B1Publication Date: 2014-05-13
- Inventor: Teren G. Jameson , Zachary C. Bagley , Scott C. Smedley
- Applicant: L-3 Communications Corp.
- Applicant Address: US NY New York
- Assignee: L-3 Communications Corp.
- Current Assignee: L-3 Communications Corp.
- Current Assignee Address: US NY New York
- Agency: Kirton McConkie
- Main IPC: H03H7/40
- IPC: H03H7/40

Abstract:
The present invention is directed to a decision feedback equalizer that implements a multipath delay calculator to determine the delay between a line-of-sight component of a received data signal and a reflection of the line-of-sight component. The determined delay is used to control when decisions are used within the decision feedback equalizer so that the appropriate decisions are delayed until the reflection is received. In this way, the reflection can be substantially removed from the data signal using decisions that were generated when the line-of-sight component was received. Because the correction window is limited to the time when the reflection is received, the number of taps required to perform equalization is greatly reduced resulting in a decision feedback equalizer with less circuitry or logic.
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