发明名称 |
Apparatus and method for modulating data message by employing orthogonal variable spreading factor (OVSF) codes in mobile communication system |
摘要 |
A method for converting source data to a channel-modulated signal having a plurality of pairs of in-phase (I) and quadrature-phase (Q) data in a mobile station, wherein the mobile station uses at least one channel, includes the steps of: a) encoding the source data to generate at least one data part and a control part; b) generating at least one spreading code to be allocated to the channel, wherein each spreading code is selected on the basis of a data rate of the data part and the control part and spreading codes are selected so that two consecutive pairs of the I and Q data are correspondent to two points located on same point or symmetrical with respect to a zero point on a phase domain; and c) spreading the control part and the data part by using the spreading code, to thereby generate the channel-modulated signal. The method is capable of improving a power efficiency of a mobile station by reducing a peak-to-average power ratio in a mobile communication system. |
申请公布号 |
US7586973(B2) |
申请公布日期 |
2009.09.08 |
申请号 |
US20060618361 |
申请日期 |
2006.12.29 |
申请人 |
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE |
发明人 |
BANG SEUNG-CHAN;KIM TAE-JOONG;KIM JAE-HEUNG;KIM JUNG-IM;CHAE JONG-SUK;LEE HYUCK-JAE;SHIM JAE-RYONG;LEE NARM-HEE |
分类号 |
H04B1/707;H04L27/20;H04J11/00 |
主分类号 |
H04B1/707 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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