EP 0629059 A1 19941214 - Spread spectrum digital transmission system with low frequency pseudorandom coding of the useful information and method for spectrum spreading and compressing used in such a system.
Title (en)
Spread spectrum digital transmission system with low frequency pseudorandom coding of the useful information and method for spectrum spreading and compressing used in such a system.
Title (de)
Digitales Spreizspektrumübertragungssystem mit Niederfrequenz-Pseudozufallkodierung von Nutzinformation und Verfahren zur Spektrumsspreizung und Spektrumskomprimierung zur Verwendung in einem solchen System.
Title (fr)
Système de transmission numérique à étalement de spectre obtenu par codage pseudo-aléatoire basse fréquence de l'information utile et procédé d'étalement et de compression de spectre utilisé un tel système.
Publication
Application
Priority
FR 9306936 A 19930609
Abstract (en)
System and method for combining, within a transmitter, each block of a digital signal to be transmitted with a sample originating from a pseudo-random generator operating at low frequency. The results of the various combinations are converted into orthogonal or quasi-orthogonal sequences, modulated and transmitted to the receiver. The receiver performs demodulation of the signal received and combines each sequence with a sample identical to that used for the low-frequency coding within the transmitter in order to reconstitute the various blocks. Makes it possible to carry out low-frequency spectral spreading of a signal to be transmitted. <IMAGE>
IPC 1-7
IPC 8 full level
H04K 1/02 (2006.01)
CPC (source: EP US)
H04K 1/02 (2013.01 - EP US)
Citation (search report)
- [A] US 4972474 A 19901120 - SABIN MICHAEL J [US]
- [A] GB 2233860 A 19910116 - STC PLC [GB]
- [A] US 4685132 A 19870804 - BISHOP F AVERY [US], et al
- [A] DE 2110468 C1 19780427 - SIEMENS AG
Designated contracting state (EPC)
DE ES FR GB IT NL SE
DOCDB simple family (publication)
EP 0629059 A1 19941214; EP 0629059 B1 20010905; CA 2125444 A1 19941210; DE 69428155 D1 20011011; ES 2162846 T3 20020116; FR 2706704 A1 19941223; FR 2706704 B1 19950713; US 5546423 A 19960813
DOCDB simple family (application)
EP 94401282 A 19940608; CA 2125444 A 19940608; DE 69428155 T 19940608; ES 94401282 T 19940608; FR 9306936 A 19930609; US 25705794 A 19940608