초록 ▼

A set of independent pseudonoise (PN) component codes greater than two are combined in a manner which produces one or more I and Q uncorrelated orthogonal pairs of resulting combined PN sequences. At least two of the component codes in a resulting combined PN sequence are combined in a manner which

A set of independent pseudonoise (PN) component codes greater than two are combined in a manner which produces one or more I and Q uncorrelated orthogonal pairs of resulting combined PN sequences. At least two of the component codes in a resulting combined PN sequence are combined in a manner which produces an overall imbalance of ones and zeros in the binary expression of the resulting combined PN sequence so that the resulting composite code has a partial correlation with a predetermined one of the PN component codes. In the preferred embodiment, three component codes are combined to produce uncorrelated orthogonal pairs of composite codes wherein at least one of the pairs of composite codes is produced to have a partial correlation with one or more of the component codes.

대표청구항 ▼

Apparatus and method for generating a plurality of mutually orthogonal sequence signals, comprising: a clock; a first plurality of PN code generators each clocked by said clock and each producing a PN sequence signal, said resulting first plurality of PN sequence signals being independent of each ot

Apparatus and method for generating a plurality of mutually orthogonal sequence signals, comprising: a clock; a first plurality of PN code generators each clocked by said clock and each producing a PN sequence signal, said resulting first plurality of PN sequence signals being independent of each other, wherein each of said first plurality of PN sequence generators also produces a signal representing the inverse of its PN sequence signal and signal representing another phase of its PN sequence signal; and code combining means, receiving said first plurality of PN sequence signals, said first plurality of inverted PN sequence signals and said first plurality of differently phased PN sequence signals, for producing a second plurality of mutually orthogonal PN sequence signals, wherein each of said second plurality of PN sequence signals represents a PN sequence that is longer than any of the first plurality of PN sequence signals, the first plurality of inverted PN sequence signals and the first plurality of differently phased PN sequence signals.