EP 0058318 B1 19840808 - SUB-BAND PERMUTATION METHOD
Title (en)
SUB-BAND PERMUTATION METHOD
Publication
Application
Priority
DE 3105214 A 19810213
Abstract (en)
[origin: EP0058318A1] 1. Method for the interchanging of equally wide partial bands of a signal frequency band by means of modulators (X), behind which are connected like band pass filters (BP 1 to BP 5) as well as further modulators (X), wherein certain carrier frequencies (f 1 to f 4) are fixedly associated with the modulators (X) and a coupling matrix (scrambling matrix), which is controllable by a random generator, for the scrambling of the partial bands is provided between the band pass filters (BP 1 to BP 5) and the modulators (X) connected therebehind, characterised thereby, that the carrier frequencies display the values fnu = (nnu - i/l) . B with nu = 1, 2 ... partial bands of the bandwith B and i, l and nnu epsilon ¦ N = 1, 2 ... (elements epsilon from the mass of natural numbers) as freely selectable parameters, wherein i and nnu can also assume the value 0, and that the modulators (X) operate discretely in time and the relationship fS = 2m nu . fnu , mnu epsilon ¦ N = 1, 2 ... applies for the scanning frequency of the carrier oscillations.
IPC 1-7
IPC 8 full level
H04K 1/04 (2006.01)
CPC (source: EP)
H04K 1/04 (2013.01)
Citation (examination)
Designated contracting state (EPC)
BE CH DE FR GB IT LI LU NL
DOCDB simple family (publication)
EP 0058318 A1 19820825; EP 0058318 B1 19840808; CA 1186380 A 19850430; DE 3105214 A1 19820909; DE 3260506 D1 19840913; DK 52682 A 19820814; ES 509565 A0 19821216; ES 8302387 A1 19821216; FI 820393 L 19820814; PT 74410 A 19820301; PT 74410 B 19831028
DOCDB simple family (application)
EP 82100607 A 19820129; CA 395659 A 19820205; DE 3105214 A 19810213; DE 3260506 T 19820129; DK 52682 A 19820208; ES 509565 A 19820212; FI 820393 A 19820208; PT 7441082 A 19820210