Global Patent Index - EP 0980605 A2

EP 0980605 A2 20000223 - MASK GENERATING POLYNOMIALS FOR PSEUDO-RANDOM NOISE GENERATORS

Title (en)

MASK GENERATING POLYNOMIALS FOR PSEUDO-RANDOM NOISE GENERATORS

Title (de)

MASKENGENERIERENDE POLYNOME FÜR PSEUDOZUFALLS-RAUSCHGENERATOREN

Title (fr)

POLYNOMES DE GENERATION DE MASQUES POUR DES GENERATEURS DE BRUIT PSEUDO-ALEATOIRE

Publication

EP 0980605 A2 (EN)

Application

EP 99905117 A

Priority

  • IB 9900366 W
  • US 3543098 A

Abstract (en)

[origin: WO9945670A2] A CDMA baseband modern having a PN generator with significant reduction in stored masks is disclosed. Various performance matrices set forth alternative combinations of sequence generation through three parameters: storage, software, and time. Embodiments of this implementation are presented with corresponding hardware complexities. Masks are used to move to a new phase offset sequence. Instead of storing 2<N> masks, less than N masks are required to be stored in ROM because of mask calculation intelligence carried out in the software/software control. Masks are calculated with a mask generating polynomial based upon any degree of characteristic polynomial of a PN generator. Masks for the mask generator are only stored which result in phase shifts of powers of two. The characteristic polynomial of the pseudo-random noise generator and the mask generator are Galois and Fibonacci polynomials.

IPC 1-7

H04K 1/02

IPC 8 full level

H03K 3/84 (2006.01); G06F 7/58 (2006.01); G09C 1/00 (2006.01); H04B 1/707 (2011.01); H04J 13/00 (2011.01)

CPC (source: EP KR)

G06F 7/584 (2013.01 - EP KR); H04B 1/707 (2013.01 - EP KR); H04J 13/0022 (2013.01 - EP KR); H04J 13/10 (2013.01 - EP KR)

Citation (search report)

See references of WO 9945670A3

Designated contracting state (EPC)

DE ES FR GB IT

DOCDB simple family (publication)

WO 9945670 A2 19990910; WO 9945670 A3 19991118; CN 1307769 A 20010808; EP 0980605 A2 20000223; JP 2001527728 A 20011225; KR 20010012192 A 20010215

DOCDB simple family (application)

IB 9900366 W 19990303; CN 99800653 A 19990303; EP 99905117 A 19990303; JP 54445499 A 19990303; KR 19997010141 A 19990303