Sk Telecom Company, Ltd.

Duk-Kyung Kim

Jin-Young Kim

Sang-shin Lee

Jong-Tae Ihm

Sang-Yun Lee

Seong-Soo Park

Dong-Hahk Lee

Yoon-Seok Jung

Ra-Mi Lee

Jae-Hwang Yu

Disclosed is a method and system for estimating an adaptive joint channel in a CDMA system based on TDD. The method includes the steps of a) receiving activity information of a mobile terminal; b) parsing the activity information, and transmitting a midamble sequence to the mobile terminal when a result of the parsing shows that the mobile terminal is in an ON state; c) conducting adaptive joint channel estimation by using the midamble sequence in the mobile terminal; and d) conducting adaptive joint detection by using a channel impulse response of the mobile terminal, obtained as a result of conducting the adaptive joint channel estimation. The method and system decreases the complexity in channel estimation and additionally increases the accuracy of channel estimation by reducing transmission power consumption and eliminating unnecessary interference.

Method and system for estimating adaptive combined channel in CDMA system based on time division duplex system

A method for assigning codes in an uplink of a synchronous code division multiple access (CDMA) telecommunication system is disclosed. The method for assigning a code in a reverse channel of a synchronous wireless telecommunication system, comprising the steps of: a) at a mobile station, receiving time matching information of a scrambling code from a base station; b) at the mobile station, spreading data frame to be transmitted by an orthogonal code, thereby generating a spread data; and c) at the mobile station, multiplying the spread data by a scrambling code based on the time matching information of the scrambling code, thereby generating an encoded data.

Method for assigning codes in uplink of synchronous wireless telecommunication system

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Incheon, South Korea

Duk-Kyung Kim