DEVICE USED FOR MOBILE USER UNIT OF SPREAD-SPECTRUM MULTIPLE ACCESS WIRELESS SYSTEM BASED UPON ORTHOGONAL FREQUENCY-DIVISION MULTIPLEX(OFDM) SYSTEM

Japanese Patent JP2001358694

A

To enable a mobile user device to seedily discriminate and synchronize with a downlink of the base station sending the intensest signal through an orthogonal frequency-division multiplex(OFDM) system, based upon a spread- spectrum multiple access(SSMA) system.

The base station discrimination is actualized by finding the gradient of the most intense received pilot signal (having maximum energy). A pilot tone hopping series is based upon a Latin square series. With the pilot tone hopping series based upon Latin square, the need that the mobile user device has in only for determining the frequency of a pilot tone at a certain time. The gradient and initial frequency shift of the pilot tone hopping series having the highest reception power are determined, by using a natural maximum energy detector. The natural gradient of the pilot hopping series is used to discriminate the base station having the most intense down-link signal.

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LAROIA RAJIV
LI JUNYI
RANGAN SUNDEEP
VISWANATH PRAMOD

JP2001116607A

December 26, 2001

April 16, 2001

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LUCENT TECHNOLOGIES INC

H04B1/713; H04B1/7143; H04B1/7156; H04B7/26; H04J11/00; H04L5/02; H04L27/26; (IPC1-7): H04J11/00; H04B7/26; H04J13/00

JP2000503494A

2000-03-21

Hirofumi Mimata

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