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METHOD AND APPARATUS FOR MC/MC-DS DUAL-MODE SPREADING FOR ADAPTIVE MULTICARRIER CODE DIVISION MULTIPLE ACCESS SYSTEM
METHOD AND APPARATUS FOR MC/MC-DS DUAL-MODE SPREADING FOR ADAPTIVE MULTICARRIER CODE DIVISION MULTIPLE ACCESS SYSTEM
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机译:自适应多载波码分多址系统MC / MC-DS双模扩频的方法和装置
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摘要
Provided are multi-carrier (MC)/multi-carrier direct sequence (MC-DS) dual-mode adaptable CDMA apparatus, the method thereof, and a computer program that implements the method. The apparatus can vary the user modulation degree and the transmission repetition degree independently, and convert a spreading scheme between the time-based spreading scheme (MC-DS-CDMA) and the frequency-based spreading scheme (MC-CDMA) in a MC-CDMA system. The apparatus includes: a user signal processing unit for performing symbol modulation, repetition and spreading of bit stream for each user based on a transmission mode suitable for channel environment of each user, and generating spread chip streams for the user; a combining unit for adding up all the spread chip streams for the users; a first interleaving unit for interleaving the chip streams added up in the combining unit and generating a first interleaved stream; and a second interleaving unit for optionally performing a second interleaving on the first interleaved stream.
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