Login| Sign Up| Help| Contact|

Patent Searching and Data


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:
Click for automatic bibliography generation   Help
Assignee:
QUALCOMM INC
International Classes:
H04J11/00; H04B1/692; H04B1/713; H04J1/00; H04J3/00; H04J4/00; H04L27/26; H04L5/02
Domestic Patent References:
JP2000201134A2000-07-18
Foreign References:
WO2003034645A12003-04-24
WO2002073831A12002-09-19
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