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Multipath signal strength indicator

A multipath signal and indicator technology, applied in the direction of using signal quality detectors for error detection/prevention, reducing electrical interference, diversity/multi-antenna systems, etc.

Inactive Publication Date: 2005-10-26
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, conventional SSIs may produce maximum levels from antennas pointing between the direction of one or more strong multipath components and the direction directly transmitting the source of the signal component, rather than at the source of the directly transmitting signal component direction

Method used

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  • Multipath signal strength indicator
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Examples

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Embodiment Construction

[0017] 1 is a block diagram of a portion of a communications receiver including a multipath signal strength indicator in accordance with the principles of the invention. Figure 1 illustrates only those elements necessary to describe and understand the operation of the invention. Those skilled in the art will understand what additional components are necessary, how to design and implement these components, and how to interconnect all the components to form a functioning communication receiver. To simplify the figure, clock signal lines and control lines are not illustrated. Those skilled in the art will understand that these signals are necessary and how to generate them and interconnect them to form the circuit shown in FIG. 1 .

[0018] In FIG. 1 , an antenna 2 , specifically a directional antenna, is connected to an input terminal of a receiver front end 6 . This front end 6 may include a radio frequency (RF) tuner; an intermediate frequency (IF) amplifier; a demodulator; ...

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PUM

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Abstract

A multipath signal strength indicator is included in a communications receiver which is responsive to a communications channel subject to a multipath signal. The multipath signal strength indicator includes circuitry for estimating the characteristics of the communications channel and circuitry for storing nominal characteristics of a communications channel free of the multipath signal. Further circuitry calculates the difference between the nominal characteristic and the estimated channel characteristic as the multipath signal strength.

Description

field of invention [0001] The present invention relates to signal strength indicators and, in particular, to signal strength indicators useful for antenna pointing purposes, especially in terrestrial broadcast applications where multipath interference is severe. Background of the invention [0002] Communication receivers often include a signal strength indicator. The signal strength indicator produces an indication of the combination of all signal components received by the receive antenna. These components include, among other things, a direct transmission signal component, a noise component and possibly one or more multipath signal components which are delayed versions of the direct transmission signal component resulting from reflections from objects. Multipath signals caused by reflections from fixed objects are called static multipath or ghost signals. The multipath signals generated by reflections from moving objects are called dynamic multipath or Doppler signals. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00H04L1/20H04L25/03
CPCH04B17/318H04L1/20H04B17/0057H04L2025/03477H04B1/18H04B7/10H04B15/02H04L1/02
Inventor A·R·布伊莱特M·T·迈尔
Owner THOMSON LICENSING SA
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