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Method and apparatus for pilot multiplexing in a wireless communication system

A technology of pilot code and pilot sequence, which is applied in the field of communication and can solve problems such as reducing data performance

Active Publication Date: 2014-06-25
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

Examples

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Embodiment Construction

[0022] The techniques described herein may be used in various wireless communication systems, such as multiple-access communication systems, broadcast systems, wireless local area networks (WLANs), and the like. The terms "system" and "network" are often used interchangeably. The multiple access system can be Code Division Multiple Access (CDMA) system, Time Division Multiple Access (TDMA) system, Frequency Division Multiple Access (FDMA) system, Orthogonal FDMA (OFDMA) system, Single Carrier FDMA (SC-FDMA) system, space Division Multiple Access (SDMA) systems, etc. These techniques can also be used in systems that employ different multiple access schemes for the uplink and downlink, eg OFDMA for the downlink and SC-FDMA for the uplink. The downlink (or forward link) refers to the communication link from the base station to the terminal, and the uplink (or reverse link) refers to the communication link from the terminal to the base station.

[0023] OFDMA systems employ Orth...

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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 [0002] 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 [0003] 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 [0004] 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 Patents(China)
IPC IPC(8): H04B7/06H04J13/00H04L5/00H04L25/02H04L27/26
CPCH04L5/0016H04L5/005H04L27/2613H04J13/0062H04L27/2601
Inventor B·金魏永斌A·达巴格
Owner QUALCOMM INC