Patents
Sitemap › H04 - Electric communication technique › H04J - Multiplex communication › H04J 13 - Code division multiplex systems
Patents for H04J 13 - Code division multiplex systems (21,510)
12/1990
12/12/1990EP0292487A4 Spread-spectrum multiplexed transmission system
12/11/1990US4977578 Spread spectrum communication system
12/05/1990EP0400755A1 Digital transmission system using subband coding of a digital signal
12/05/1990EP0400314A2 Spread spectrum communication system
12/05/1990EP0400222A1 Digital transmission system using subband coding of a digital signal
11/1990
11/30/1990CA2014323A1 Spread spectrum communication system
11/22/1990EP0398329A2 Spread spectrum signal demodulation circuit
11/20/1990US4972430 Spread spectrum signal detector
11/18/1990CA2017188A1 Correlation processing device using a surface acoustic wave convolver
11/14/1990EP0397094A2 Spread spectrum communication system
11/06/1990US4969159 Spread spectrum communication system employing composite spreading codes with matched filter demodulator
10/1990
10/23/1990US4965808 Code tracking apparatus with improved resolution for spread spectrum receiver
10/18/1990WO1990012463A1 Spread spectrum-time diversity communications systems and transceivers for multidrop local area networks
10/16/1990US4964138 Differential correlator for spread spectrum communication system
10/16/1990US4963998 Apparatus for marking a recorded signal
10/09/1990US4962507 Feed forward spread spectrum signal processor
10/03/1990EP0390417A2 Spread-spectrum identification signal for communications systems
09/1990
09/24/1990CA2012183A1 Spread spectrum communication device
09/20/1990WO1990010982A1 Spread spectrum communications system with randomizing signal
09/18/1990US4958359 Communication apparatus
09/12/1990EP0386985A2 Spread spectrum signal detector
09/12/1990EP0386029A1 Demodulation method.
09/05/1990EP0385636A2 Code tracking apparatus with improved resolution for spread spectrum receiver
08/1990
08/28/1990US4953178 Spread spectrum communication system
08/23/1990DE4005322A1 Pseudo-random noise code generator - has bit reverses with code data and mirror image code data and shift register for pseudo-random noise code delivery
08/09/1990DE4003671A1 Spread spectrum communication system - uses convolver as correlator for pseudo-random code signals
08/07/1990CA2008969A1 Spread spectrum communication device
07/1990
07/24/1990US4943977 Correlation pulse generating circuit in a spread spectrum receiver
07/24/1990US4943976 Spread spectrum communication system
07/24/1990US4943973 Spread-spectrum identification signal for communications system
07/18/1990EP0378417A2 Code division multiplex system
07/17/1990US4942590 Optimum clock generator in data communication
07/13/1990CA2007554A1 Code division multiplex system using selectable length spreading code sequence
07/10/1990US4941150 Spread spectrum communication system
07/04/1990EP0376335A2 Digital transmission system
07/03/1990US4939745 Apparatus for generating orthogonal sequences
07/03/1990US4939472 Integrating circuit
06/1990
06/28/1990CA2005790A1 Digital transmission system
06/26/1990US4937822 Skywave adaptable communication apparatus
06/12/1990US4933953 Initial synchronization in spread spectrum receiver
06/12/1990US4933952 Asynchronous digital correlator and demodulators including a correlator of this type
05/1990
05/29/1990US4930140 Code division multiplex system using selectable length spreading code sequences
05/29/1990US4930139 Spread spectrum communication system
05/23/1990EP0369703A2 Spread spectrum communication system
05/15/1990US4926440 Spread-spectrum communication apparatus
05/15/1990CA2002883A1 Differential correlator for spread spectrum communication system
05/02/1990EP0366086A2 Code shift keying (csk) apparatus and method for spectrum spread communication
05/02/1990CN1007864B Code devision multiplexer using direct sequence spread spectrum signal processing
04/1990
04/17/1990US4918707 Spread spectrum demodulating device for spread spectrum communication system
04/17/1990US4918689 Asynchronous communication system
04/04/1990EP0361299A2 Digital radio transmission system for a cellular network using the spread spectrum technique
03/1990
03/28/1990EP0360476A2 Homodyne-type spread spectrum transmitter/receiver
03/27/1990US4912722 Self-synchronous spread spectrum transmitter/receiver
03/14/1990EP0358466A2 A direct sequence modulation apparatus
02/1990
02/27/1990US4905221 Earth station capable of effectively using a frequency band of a satellite
02/13/1990US4901307 Spread spectrum multiple access communication system using satellite or terrestrial repeaters
01/1990
01/23/1990CA1264812A1 Spread spectrum communications system
01/17/1990EP0351008A2 Transmission system for sending two signals simultaneously on the same communications channel
01/10/1990EP0349603A1 Process and arrangement for equalizing dispersive, linear or approximately linear channels for transmitting digital signals.
12/1989
12/06/1989EP0344402A2 Method for the transmission of data by means of optical waveguides
11/1989
11/28/1989US4884284 Spread spectrum receiver
11/21/1989US4882579 Code division multiplexed acknowledge back paging system
11/07/1989US4879726 Spread spectrum communications system
10/1989
10/25/1989EP0338794A2 Apparatus for marking a recorded signal
10/17/1989US4875221 Spread spectrum receiver
10/11/1989EP0336832A1 Asynchronous digital correlator and demodulators comprising such a correlator
10/10/1989US4873699 Method and device for coding and decoding a broadband transmission
10/03/1989US4872200 System of orthogonal code generators, radios provided with a code generator and code generators of such a system
09/1989
09/26/1989CA1260141A1 Decoder for spectrum diffusion signals
09/12/1989US4866735 Spread spectrum communicating method
09/12/1989US4866733 Radio bus system
09/12/1989US4866732 Wireless telephone system
08/1989
08/29/1989US4862479 Spread spectrum communication system
08/22/1989US4860307 Synchronization pulse generator in spread spectrum communication system
07/1989
07/18/1989US4850036 Radio communication system using synchronous frequency hopping transmissions
07/13/1989WO1989006407A1 Code division multiplexed acknowledge back paging system
07/11/1989US4847861 Maximum length linearly occurring code sequence generator in a spread spectrum communication system
07/05/1989EP0322542A1 Method for equalizing dispersive, linear or nearly linear channels for transmitting digital signals, and apparatus for carrying out said method
07/04/1989US4845726 Maximum length linearly recurring sequence generator control device
07/04/1989CA1256946A1 Hidden preamble for frequency hopped synchronization
06/1989
06/29/1989WO1989006073A1 Process and arrangement for equalizing dispersive, linear or approximately linear channels for transmitting digital signals
06/20/1989US4841545 Synchronous tracking device for direct spread spectrum receiver
06/14/1989EP0319973A2 Spread spectrum demodulating device for spread spectrum communication system
05/1989
05/05/1989WO1989004095A1 Demodulation method
05/02/1989CA1253638A1 Satellite communication system
03/1989
03/28/1989CA1251875A1 Method of and arrangement for synchronising the receiver arrangements in a digital multiplex transmission system
03/14/1989CA1251262A1 Rapid anti-jam frequency-hopping time synchronization
03/01/1989EP0304890A2 Earth station capable of effectively using a frequency band of a satellite
02/1989
02/28/1989US4809295 Code lengthening system
01/1989
01/17/1989US4799252 Digital radio transmission system
12/1988
12/20/1988CA1247266A1 Wireless telephone system
12/06/1988CA1246254A1 System for improving signal-to-noise ratio in a direct sequence spread spectrum signal receiver
11/1988
11/30/1988EP0292487A1 Spread-spectrum multiplexed transmission system.
11/29/1988CA1245781A1 Timing signal correction system for use in direct sequence spread spectrum signal receiver
11/15/1988US4785410 Maximum length shift register sequences generator
10/1988
10/19/1988EP0287154A1 System of orthogonal code generators, radios provided with a code generator and code generators of such a system
09/1988
09/28/1988EP0284493A1 Method and device for encoding and decoding a spread-spectrum transmission
09/07/1988EP0280718A1 Hidden preamble for frequency hopped synchronization.
07/1988
07/26/1988US4760586 Spread spectrum communication system
07/14/1988DE3644175A1 Method for transmitting data using satellites
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