Code allocation for radiocommunication systems
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United States of America Patent
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Apr 1, 2003
Grant Date -
N/A
app pub date -
May 15, 1998
filing date -
May 15, 1998
priority date (Note) -
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Abstract
Multiple code sets are introduced in the downlink of a CDMA system to allow for more connections in each cell. The codes are then allocated to different users taking into account the interference therebetween. The interference depends on the antenna gains, transmission powers used and cross-correlations between codes. By estimating these parameters the interference can be minimized in the code allocation process. Since the allocation of codes and code sets to geographical areas within a cell may change over time, code handoff is supported.
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