초록 ▼

A technique for spreading information signals in a spread spectrum communication system to provide increased signal acquisition speed. A first PN spreading code or code set is used to spread information signals along with a second PN spreading code sequence or function. The second PN code is synchro

A technique for spreading information signals in a spread spectrum communication system to provide increased signal acquisition speed. A first PN spreading code or code set is used to spread information signals along with a second PN spreading code sequence or function. The second PN code is synchronized with the first PN spreading code, but has a larger code period so that each code chip of the second PN code extends over the entire period of the first PN code. The longer period spreading code forms an outer code which helps provide unambiguous beam identification and easily acquired frame timing in the presence of dynamically changing signal path delay, improving signal acquisition.

대표청구항 ▼

1. An apparatus for spreading an information signal in a spread spectrum communication system in which digital information signals are bandwidth spread using at least one preselected pseudorandom noise (PN) spreading code to produce spread spectrum signals, comprising:means for generating said digit

1. An apparatus for spreading an information signal in a spread spectrum communication system in which digital information signals are bandwidth spread using at least one preselected pseudorandom noise (PN) spreading code to produce spread spectrum signals, comprising:means for generating said digital information signals; spreading means for receiving and combining at least one first predetermined PN spreading code having a first code length and first code period, a second predetermined PN code sequence having a second code length and second code period, and said digital information signals to provide said spread spectrum signals, said first code length being substantially longer than said second code length and said second code period being substantially longer than said first code period.