Patent ID: 7426528
Filing Date: 2008-09-16
Classification: H04B

Abstract:
1. A method for determining a final state, comprising n bits and iterated N times, for a shift register arrangement from a given initial state, comprising n bits, for the shift register arrangement, the iteration rule for the shift register arrangement being given by the characteristic polynomial  with c a) determining a tap mask which is characteristic of N′ shift register operations; and b) performing n shift register operations, as a result of which the tap mask is used for each shift register operation to obtain one bit from n bits of an N′-fold iterated state of the shift register arrangement, wherein step a) comprises:  splitting N′ on the basis of  and determining the tap mask which is characteristic of N′ shift register operations using k′ tap masks m wherein the method is used in CDMA transmission systems in order to produce a spreading sequence with an offset of N bits.