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ORTHOGONAL CODE DIVISION MULTIPLE ACCESS COMMUNICAORTHOGONAL CODE DIVISION MULTIPLE ACCESS COMMUNICATION SYSTEM HAVING MULTICARRIER MODULATION TION SYSTEM HAVING MULTICARRIER MODULATION
ORTHOGONAL CODE DIVISION MULTIPLE ACCESS COMMUNICAORTHOGONAL CODE DIVISION MULTIPLE ACCESS COMMUNICATION SYSTEM HAVING MULTICARRIER MODULATION TION SYSTEM HAVING MULTICARRIER MODULATION
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机译：具有多载波调制的正交码划分多路访问通信具有多载波调制的正交码划分多路访问通信系统
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摘要
An orthogonal code division multiple access (OCDMA) communication system having multicarrier modulation. The incoming input data stream is broken into multiple parallel streams through serial to parallel converters (10, 12), each of which modulates its own frequency-division multiplexed carrier. This reduces the chipping rate such that the delay spread does not cause excessive access noise. Particularly robust delay lock loop (DLL) code tracking and particularly robust automatic frequency control (AFC) are provided in the presence of frequency-selective fading.
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