Method and apparatus for pilot multiplexing in a wireless communication system

A multiplexing and pilot code technology, applied in the field of communication, can solve the problem of reducing data performance

Active Publication Date: 2009-02-25
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inter-antenna and inter-transmitter interference can adversely affect channel estimation and degrade data performance

Method used

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  • Method and apparatus for pilot multiplexing in a wireless communication system
  • Method and apparatus for pilot multiplexing in a wireless communication system
  • Method and apparatus for pilot multiplexing in a wireless communication system

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Abstract

Techniques for multiplexing pilots in a wireless transmission are described. In one aspect, a transmitter station generates multiple pilot sequences for multiple transmit antennas, with each pilot sequence comprising pilot symbols sent in the time domain on a different set of subcarriers. The transmitter station further generates multiple pilot transmissions for the transmit antennas based on the pilot sequences. In another aspect, a transmitter station generates multiple pilot sequences for multiple transmit antennas based on frequency-domain code division multiplexing (FD-CDM) of a Chu sequence defined by a transmitter-specific value. The transmitter station further generates multiple pilot transmissions for the transmit antennas based on the pilot sequences. In yet another aspect, a transmitter station generates multiple pilot transmissions for multiple transmit antennas based on a first multiplexing scheme and generates multiple data transmissions based on a second multiplexing scheme that is different from the first multiplexing scheme.

Description

[0001] Priority claims under 35 U.S.C. §119 [0001] This patent application claims the priority of provisional application No. 60 / 760,482, filed on January 20, 2006, entitled "METHODAND APPARATUS FOR PILOT MULTIPLEXING IN A WIRELESS COMMUNICATIONS SYSTEM", assigned to the assignee of the present invention, hereby expressly Include it for reference. technical field [0002] Generally, the present invention relates to communications. In particular, the present invention relates to techniques for transmitting pilot signals in wireless communication systems. Background technique [0003] In a wireless communication system, a transmitter station (such as a base station or a terminal) may employ multiple (T) transmit antennas for multiple-input multiple-output (MIMO) transmissions to a receiver station equipped with multiple (R) receive antennas . Multiple transmit and receive antennas form a MIMO channel that can be used to increase throughput and / or increase reliability. Fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04B1/76H04L5/02H04L1/06H04B1/707H04L25/02
CPCH04L5/0016H04L5/005H04L27/2613H04J13/0062H04L27/2601
Inventor B·金魏永斌A·达巴格
Owner QUALCOMM INC
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