SDMA FOR WCDMA HAVING CAPACITY INCREASED BY USE OF MULTIPLE SCRAMBLING CODES

摘要

PROBLEM TO BE SOLVED: To provide systems and methodologies that facilitate increasing system capacity in a code-limited wide-band code-division multiple access wireless communication environment.SOLUTION: A larger code space is defined by introducing multiple code clusters in a sector, each cluster having a unique scrambling code. Codes within a cluster have orthogonal Walsh sequences that can be assigned to user devices to facilitate communicating over a wireless network and can overlap with clusters in another cluster. The unique scrambling code assigned to each cluster ensures that duplicate Walsh sequences in another cluster in the same sector appear as pseudo-noise codes.