Method and apparatus for acquiring synchronization in code division multiple access system

Method and apparatus for acquiring synchronization in code division multiple access system

A method and an apparatus for acquiring downlink frame synchronization are provided. The method includes phase-rotating a mid-amble of a first Time Slot (TS) of a received sub-frame within an area and estimating a Channel Impulse Response (CIR), calculating a Maximum Likelihood (ML) between a downli...

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Hauptverfasser: CHOI SANG-WON, MOON JONG-GUN, WON SEUNG-HWAN, SHIM MYUNG-JOON, HWANG JONG-YOON
Format: Patent
Sprache:eng
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ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
WIRELESS COMMUNICATIONS NETWORKS
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creator CHOI SANG-WON
MOON JONG-GUN
WON SEUNG-HWAN
SHIM MYUNG-JOON
HWANG JONG-YOON
description A method and an apparatus for acquiring downlink frame synchronization are provided. The method includes phase-rotating a mid-amble of a first Time Slot (TS) of a received sub-frame within an area and estimating a Channel Impulse Response (CIR), calculating a Maximum Likelihood (ML) between a downlink synchronization code of the received sub-frame and a downlink synchronization code generated in a terminal by using the estimated CIR, correlating downlink synchronization codes of a plurality of sub-frames and the downlink synchronization code generated and calculating ML values of the plurality of sub-frames with respect to the plurality of sub-frames corresponding to M Transmission Time Intervals (TTIs), and calculating hypothesis values of hypotheses according to a frequency interval and a phase offset of the generated downlink synchronization code based on the calculated ML values of the plurality of sub-frames and drawing a frequency offset and a hypothesis corresponding to a maximum value.
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
WIRELESS COMMUNICATIONS NETWORKS
title Method and apparatus for acquiring synchronization in code division multiple access system
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