EP 0804840 A2 19971105 - APPARATUS AND METHOD FOR GENERATING PSEUDORANDOM QUANTITIES BASED UPON RADIO CHANNEL CHARACTERISTICS
Title (en)
APPARATUS AND METHOD FOR GENERATING PSEUDORANDOM QUANTITIES BASED UPON RADIO CHANNEL CHARACTERISTICS
Title (de)
EINRICHTUNG UND VERFAHREN ZUE ERZEUGUNG VON PSEUDOZUFALLSGRÖSSEN UNTER VERWENDUNG DER EIGENSCHAFTEN EINES FUNKKANALS
Title (fr)
APPAREIL PERMETTANT LA GENERATION DE QUANTITES PSEUDO-ALEATOIRES EN FONCTION DES CARACTERISTIQUES DU CANAL RADIO ET PROCEDE CORRESPONDANT
Publication
Application
Priority
- US 9600868 W 19960119
- US 37614495 A 19950120
- US 55596895 A 19951113
Abstract (en)
[origin: WO9623376A2] Characteristics of the radio channel are used to establish pseudorandom sequences for use in communicating information. These characteristics are the short-term reciprocity and rapid spatial decorrelation of phase of the radio channel. Due to the reciprocal nature of these radio channel characteristics, the transceivers which are communicating via the radio channel will generally both determine the same sequence. Although the determined sequences are not always sufficiently random for use in pseudorandom functions, a randomness tester can be provided to discard those sequences which are not sufficiently random. Exemplary pseudorandom communication functions include the selection of a spreading sequence in CDMA systems and the selection of a hopping sequence in a TDMA or CDMA system.
IPC 1-7
IPC 8 full level
H04L 9/12 (2006.01); H04B 17/00 (2006.01); H04J 13/00 (2011.01); H04J 13/18 (2011.01); H04K 1/00 (2006.01); H04L 9/08 (2006.01); H04L 9/36 (2006.01)
CPC (source: EP)
H04B 17/0087 (2013.01); H04B 17/391 (2015.01); H04J 13/0022 (2013.01); H04J 13/18 (2013.01); H04K 1/00 (2013.01); H04L 9/0838 (2013.01); H04L 2209/80 (2013.01)
Designated contracting state (EPC)
DE FR GB SE
DOCDB simple family (publication)
WO 9623376 A2 19960801; WO 9623376 A3 19970116; AU 5414896 A 19960814; AU 702129 B2 19990211; CA 2210714 A1 19960801; CN 1153403 C 20040609; CN 1179248 A 19980415; EP 0804840 A2 19971105; FI 973067 A0 19970718; FI 973067 A 19970919; JP H10513317 A 19981215
DOCDB simple family (application)
US 9600868 W 19960119; AU 5414896 A 19960119; CA 2210714 A 19960119; CN 96192658 A 19960119; EP 96911184 A 19960119; FI 973067 A 19970718; JP 52296896 A 19960119