직교 확산을 위한 채널 확산 코드 할당 장치 및 방법
김재흥, 김정임, 심재용, 김태중, 방승찬, 채종석, 이혁재, 이남희
- 7586973 (2009.09.08)
- 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.
- KSP 제안 키워드
- Average Power, Communication system, Data Message, In-phase, Mobile station(MS), Modulated signal, Orthogonal Variable Spreading Factor(OVSF), Peak-to-Average-Power-Ratio(PAPR), Power Efficiency, Spreading factor, data rate, mobile communication, mobile communication system, phase domain, power ratio, spreading code, zero point