A code-division switch architecture for satellite applications

摘要

This paper introduces a code-division methodology into switchingnapplications. The proposed method is applied in satellite-switchedncode-division multiple-access (SS/CDMA) systems for routing CDMA trafficnchannels on board the multibeam satellites. We present code-divisionnswitch (CDS) architectures, analyze the CDS performance, and assess itsncomplexity. The CDS has been shown to route CDMA user channels withoutnintroducing interference. The proposed CDS architecture is nonblocking,nand its hardware complexity and speed are proportional to the size ofnthe switch. We also examine the amplitude distribution of the combinednsignal in the CDS bus and the interference evaluation of the end-to-endnlink in the proposed applications. Then we consider the problem ofnswitch control under an optimum or a random algorithm and compare itsncomplexity with the equivalent problem in time-multiplexed switchingnmethods