SLOTTED MODE CODE USAGE IN A CELLULAR COMMUNICATIONS SYSTEM

摘要

THE DOWNLINK CHANNELIZATION CODE LIMITATION PROBLEM ENCOUNTERED IN SPREAD SPECTRUM OR CDMA CELLULAR SYSTEMS IS RESOLVED BY USING CODES FROM A DIFFERENT,NON-ORTHOGONAL CODE SET WHEN OPERATING IN THE SLOTTED MODE. THE NON-ORTHOGONAL CODE SETS CAN BE CONSTRUCTED BY USING THE SAME CHANNELIZATION CODE TREE, BUT APPLYING A DIFFERENT SCRAMBLING CODE (12, 116).FIGURE 3