F-Term-List

H04J1/00-1/20;4/00-15/00;H04L5/00-5/12

AA00
FREQUENCY-DIVISION MULTIPLEX SYSTEM

AA01

AA02

AA03

AA04

AA05

AA06

AA07

AA08

AA09

AA10

. Transmission systems

. . using amplitude modulation

. . using frequency modulation

. . using phase modulation

. . DSB or double sidebands

. . VSB or vestigial sidebands

. . transmitting control signals

. . of multi-direction multiplexing (1:N)

. . Variable frequency allocation

. . Radio transmission

AA11

AA12

AA13

AA14

AA15

AA16

AA17

AA18

AA19

. Transmitters

. . Multiplexing circuits

. . . by multi-stage frequency-changing

. . . by reduction

. . . by comb-type filters

. . . by numerical processing e.g. Fourier transform

. . Carrier-supply circuits

. . . by division

. . . by harmonics

AA21

AA22

AA23

AA24

AA25

AA26

AA27

AA28

AA29

AA30

. Receivers

. . Demultiplexing circuits

. . . by filters

. . . . using frequency-changing

. . . . by comb-type filters

. . . by numerical processing e.g. Fourier transform

. . Carrier-regeneration circuits

. . Cross-talk reduction circuits

. . AGC circuits or automatic gain control circuits

. . Synchronous circuits

AA31

AA32

AA33

AA34

AA35

. Intermediate station devices or repeaters

. . Branching

. . Insertion

. . by numerical processing e.g. Fourier transform

. . Conversion to time-division systems

AA41

AA42

AA43

. Improvement of reliability

. . Monitoring or testing

. . . during communications

BB00
MULTIPLEX SYSTEM IN WHICH THE AMPLITUDE OR DURATION IS SPECIALLY ADAPTED FOR CHANNEL

BB01

BB02

BB03

. distinguishing channels by amplitudes

. . by polarity

. distinguishing channels by duration

BB11

BB12

BB13

BB15

. Transmission systems

. . transmitting information by pulse width

. . transmitting information by amplitude

. . Each channel being separated in time

BB21

BB22

BB23

. Transmitters

. . Multiplexing circuits

. . . Weighted channels

CC00
MULTIPLEX SYSTEM IN WHICH THE TYPE OF MODULATION DIFFERS BY EACH CHANNEL

CC01

CC02

CC03

CC04

CC05

CC07

CC08

CC09

CC10

. Transmission system

. . using analogue modulation systems excluding pulse modulation

. . . AM or amplitude modulation

. . . FM or frequency modulation

. . . PM or phase modulation

. . using digital modulation

. . . ASK or amplitude shift keying

. . . FSK or frequency-shift keying

. . . PSK or phase shift keying

CC12

CC13

CC14

CC15

CC17

CC19

. . using pulse modulation

. . . PAM or pulse amplitude modulation

. . . PWM or pulse width modulation

. . . PPM or pulse phase modulation

. . using modulation rule violations

. . Each channel being separated in time

DD00
ORTHOGONAL MULTIPLEX SYSTEM

DD01

DD03

DD04

DD05

. Orthogonal phases

. Orthogonal polarisation

. . Linear polarisation

. . Circular polarisation

DD11

DD12

DD13

DD14

DD15

DD16

DD17

DD18

DD19

. Transmission systems

. . the same frequencies

. . Different frequencies

. . unbalanced

. . using time offset

. . VSB or vestigial sidebands

. . transmitting control signals

. . . transmitting pilot signals

. . Digital signal transmission

DD21

DD22

DD23

DD24

DD25

DD26

DD27

DD28

DD29

. Transmitters

. . Multiplexing circuits

. . . by numerical processing e.g. Fourier transform

. . Equalising circuits

. . Cross polarisation compensation circuits including only detection circuits

. . . Antenna-feed-system compensation

. . . Intermediate frequency band compensation

. . . Baseband compensation

. . . Compensation using transversal filters

DD31

DD32

DD33

DD34

DD35

DD36

DD37

DD38

DD39

. Receivers

. . Demultiplexing circuits

. . . by numerical processing e.g. Fourier transform

. . Equalising circuits

. . Cross polarisation compensation circuits including only detection circuits

. . . Antenna-feed-system compensation

. . . Intermediate frequency band compensation

. . . Baseband compensation

. . . Compensation using transversal filters

DD42

DD43

DD44

. . Synchronous circuits

. . Carrier recovery circuits

. . Jitter correction circuits

DD51

DD52

DD53

DD54

. sharing circuits or elements

. . on transmitting side

. . on receiving side

. . between transmitting and receiving

EE00
CODE MULTIPLEX SYSTEM

EE01

EE02

EE03

EE04

EE06

EE08

EE09

. Spread spectrum systems

. . using PN codes or pseudo noise codes

. . . Double spreading

. . . Frequency hopping

. RADA or random access discrete address systems

. by code conversion

. . using code-rule violation

EE11

EE12

EE13

EE14

. Transmission systems

. . Power line carriers

. . transmitting synchronisation signals

. . transmitting digital signals

EE21

EE22

EE23

EE24

EE25

. Transmitters

. . Multiplexing circuits

. . . previously spreading carriers

. . . previously spreading input information

. . Circuits for generating specific code patterns

EE31

EE32

EE33

EE34

EE35

EE36

. Receivers

. . Demultiplexing circuits

. . . by matched filters

. . . previously modulating local oscillator signals by PN or pseudo noise codes

. . Noise rejection circuits

. . Synchronous circuits

FF00
MULTIPLEX SYSTEM NOT OTHERWISE PROVIDED FOR

FF01

FF02

FF03

FF04

FF05

FF06

. Combined multiplex systems

. . combination of FDM and TDM

. . . of bursts

. . . of multi-direction multiplexing

. . . transmitting control signals

. . . Variable allocation

GG00
SYSTEM NOT DESCRIBED AS SPECIFIC MULTIPLEX SYSTEM

GG01

GG02

GG03

GG05

GG06

. Improvement of reliability

. . Monitoring or testing

. . . during communications

. . Counter-measures after faults

. . . Switching between active and standby

5K022	MULTIPLEX COMMUNICATION SYSTEMS OTHER THAN TIME-DIVISION SYSTEMS
	H04B1/69 -1/719;H04J1/00-1/20;4/00-13/22;99/00-99/00,100;H04L5/00-5/12