Novel direct sequence spread spectrum multiple access technique
C.N. Pateros · 2002
Code reuse multiple access (CRMA) is a new communication technique (patent pending) that employs direct sequence spread spectrum signaling for the access channel. It is similar to the spread ALOHA CDMA (SA/CDMA) and spread ALOHA multiple access (SAMA) multiple access techniques. The value of CRMA is that it improves on the multiple access collision performance of SAMA without the additional complexity required for SA/CDMA. It also removes some of the limitations of SAMA, since the spreading codes are not required to be maximal length codes of data symbol length. We compare the network throughput of CRMA to SAMA and to an equivalent multi-channel ALOHA system. We also discuss the combination of CRMA with ViaSat's patented paired carrier multiple access (PCMA) technique.