초록 ▼

The disclosure relates to wireless communications such as cdma systems where variable orthogonal spreading factors are employed. Code words are selected from a representation known as the orthogonal variable spreading factor (OVSF) tree, which allows code words of different length to be mixed yet re

The disclosure relates to wireless communications such as cdma systems where variable orthogonal spreading factors are employed. Code words are selected from a representation known as the orthogonal variable spreading factor (OVSF) tree, which allows code words of different length to be mixed yet remain orthogonal. The present invention provides a system whereby a subset of codes are employed whereby the bit rate can be reduced. This is of particular advantage under poor propagation conditions. Mutual interference between users is reduced.

대표청구항 ▼

The disclosure relates to wireless communications such as cdma systems where variable orthogonal spreading factors are employed. Code words are selected from a representation known as the orthogonal variable spreading factor (OVSF) tree, which allows code words of different length to be mixed yet re

The disclosure relates to wireless communications such as cdma systems where variable orthogonal spreading factors are employed. Code words are selected from a representation known as the orthogonal variable spreading factor (OVSF) tree, which allows code words of different length to be mixed yet remain orthogonal. The present invention provides a system whereby a subset of codes are employed whereby the bit rate can be reduced. This is of particular advantage under poor propagation conditions. Mutual interference between users is reduced. located in the open region between the first and second outer stationary portions; and a gap separating the stationary section and the moving section, the gap having a first gap portion separating the first outer stationary portion from the inner moving portion and a second gap portion separating the second outer stationary portion from the inner moving portion; a flexure at the distal end of the load beam and configured for receiving and supporting a read/write head; a first pair of resilient members extending from the first outer stationary portion across the gap to couple the stationary section to the moving section; a second pair of resilient members extending from the second outer stationary portion across the gap to couple the stationary section to the moving section; a third resilient member spaced laterally inward from the first and second resilient members and longitudinally located between the first and second resilient members and the proximal end of the load beam; and any one of the piezoelectric devices according to claims 1-2 and 3-6 and 10-12 extending across the gap along the extending direction of the third resilient member and coupling the stationary section to the inner moving portion for deflecting the moving section and the slider thereon along a tracking axis with respect to the stationary section in response to tracking control voltage signals.