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Channel estimation of a receiver multipath CDMA signal

A channel estimation and signal technology, applied in the field of channel estimation, can solve problems such as difficult to obtain channel estimation

Inactive Publication Date: 2010-10-13
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Interference between the multipath components of the wireless signal makes it difficult to obtain accurate channel estimates

Method used

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  • Channel estimation of a receiver multipath CDMA signal
  • Channel estimation of a receiver multipath CDMA signal
  • Channel estimation of a receiver multipath CDMA signal

Examples

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Embodiment Construction

[0059]The word "exemplary" is used herein to mean "serving as an example, instance, or illustration". Any embodiment described herein as "exemplary" should not be construed as preferred or advantageous over other embodiments. While aspects of the embodiments are shown in the drawings, the drawings are not to scale unless otherwise indicated.

[0060] The following description is directed to exemplary embodiments of systems and methods for improved channel estimation, first introducing a spread spectrum wireless communication system. The base station and mobile station and communication between them are then discussed. Next, the components of one embodiment of the subscriber unit are presented. A functional block diagram of wireless signal transmission and reception is shown and described. Details about the enhanced channel estimator are also given. An exemplary method for improving channel estimation in a wireless communication system is then discussed.

[0061] It should...

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Abstract

A method for improving channel estimation in a wireless communication system is disclosed. A wireless signal that includes a plurality of multipath components is received. N channel estimates are then obtained, where N is any positive integer greater than one. Each channel estimate of the N channel estimates corresponds to a different multipath component of the plurality of multipath components. The effects of interference between the plurality of multipath components on the N channel estimates is then reduced.

Description

field of invention [0001] The present invention relates generally to channel estimation in communication systems, and more particularly to systems and methods for improving channel estimation in wireless communication systems. technical background [0002] Communication systems are used to transfer information from one device to another. Prior to transmission, the information is encoded into a format suitable for transmission over the communication channel. Then, via the communication channel, the wireless signal containing the encoded information is transmitted. Communication receivers are used to receive wireless signals. [0003] Typically, a received wireless signal includes multiple multipath components. These multipath components are different versions of the wireless signal produced by reflections from buildings and natural objects. When traversing the communication channel, the different multipath components experience degradation due to noise. Therefore, each m...

Claims

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Application Information

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IPC IPC(8): H04L25/02
CPCH04L25/0242H04B1/711
Inventor 杜尔加·普拉萨德·马拉迪约瑟夫·J·布兰斯魏永斌
Owner QUALCOMM INC
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