FAST FREQUENCY HOPPING WITH CODE DIVISION MULTIPLEXED PILOT IN OFDMA SYSTEM

Title:

FAST FREQUENCY HOPPING WITH CODE DIVISION MULTIPLEXED PILOT IN OFDMA SYSTEM

Document Type and Number:

Japanese Patent JP2012178842

Kind Code:

A

Abstract:

To provide techniques of supporting fast frequency hopping with a code division multiplexed pilot in a multi-carrier communication system.

Each transmitter in the system transmits a wideband pilot on all subbands to allow a receiver to estimate the entire channel response at the same time. The wideband pilot for each transmitter is generated using direct sequence spread spectrum processing and based on a pseudo-random number code assigned to that transmitter. This allows the receiver to individually identify and recover multiple wideband pilots transmitted concurrently by multiple transmitters. For a time division multiplexed/code division multiplexed pilot transmission scheme, each transmitter transmits the wideband pilot in bursts. For a continuous code division multiplexed pilot transmission scheme, each transmitter continuously transmits the wideband pilot, albeit at a low transmit power level.

Inventors:

AGRAWAL AVNEESH
TEAGUE EDWARD HARRISON

Application Number:

JP2012000087396

Publication Date:

September 13, 2012

Filing Date:

April 06, 2012

Export Citation:

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Assignee:

QUALCOMM INC

International Classes:

H04J11/00; H04B1/692; H04B1/713; H04J1/00; H04J3/00; H04J4/00; H04L27/26; H04L5/02

Domestic Patent References:

JP2000201134A

2000-07-18

Foreign References:

WO2003034645A1	2003-04-24
WO2002073831A1	2002-09-19

Attorney, Agent or Firm:

蔵田昌俊
高倉成男
河野哲
中村誠
福原淑弘
峰隆司
白根俊郎
村松貞男
野河信久
幸長保次郎
河野直樹
砂川克
井関守三
佐藤立志
岡田貴志
堀内美保子
竹内将訓

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