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(Not Translated)
| 5K004 | Digital transmission methods that use modulated carrier waves | |
| H04L27/00 -27/38,100 | ||
| H04L27/00-27/30 | AA | AA00 MODULATION SYSTEMS |
AA01 | AA02 | AA03 | AA04 | AA05 | AA06 | AA07 | AA08 | ||
| . General modulation systems | . Single frequency systems | . Amplitude shift keying or ASK systems | . Frequency shift keying or FSK systems | . Phase shift keying or PSK systems | . Multiple-frequency or MF systems | . Composite modulation systems | . . Amplitude phase keying or APK systems | |||||
| BA | BA00 TRANSMISSION SYSTEMS BY GENERAL MODULATION |
BA01 | BA02 | |||||||||
| . using signal conversion | . using wireless systems | |||||||||||
| BB | BB00 RELIABILITY IMPROVEMENT IN GENERAL MODULATION |
BB01 | BB02 | BB03 | BB04 | BB05 | BB06 | |||||
| . Monitoring or experimentation | . . during transmission. | . . during non-transmission. | . Measuring | . Error detection correction or prevention | . . Removal of noise | |||||||
| BC | BC00 TRANSMITTERS USING GENERAL MODULATION. |
BC01 | ||||||||||
| . using digital operation process | ||||||||||||
| BD | BD00 RECEIVERS USING GENERAL MODULATION |
BD01 | BD02 | |||||||||
| . Shaping of wave forms | . Mode identification | |||||||||||
| CA | CA00 RECEIVERS IN SINGLE FREQUENCY SYSTEMS |
CA01 | CA02 | CA03 | CA04 | CA05 | CA06 | CA07 | CA08 | CA09 | CA10 | |
| . Detectors | . . counting the number of received signal pulses in a fixed time | . . . using integrated circuits | . . directly measuring pulse widths | . . . using counters | . . . using integrated circuits | . . comparing amplitudes with thresholds | . . . Threshold control | . . . . making hysteresis properties carried | . . using re-trigger type circuits | |||
| CA11 | CA12 | CA13 | CA14 | CA15 | CA16 | |||||||
| . . using phase-locked loops or PLL | . . using digital operation process | . . . using the Fourier conversion | . Attached circuits | . . Input signal level control | . Speed acceleration of receiver operation | |||||||
| CB | CB00 RELIABILITY IMPROVEMENT IN SINGLE FREQUENCY SYSTEMS |
CB01 | CB02 | CB03 | CB04 | |||||||
| . Countermeasures against instantaneous cutoff | . by results of plural times detections | . by monitoring signal duration time | . preventing interferences from other frequencies | |||||||||
| DA | DA00 SYSTEMS CHARACTERISED BY THE FORM OF MODULATED SIGNALS IN ASK SYSTEMS |
DA01 | DA02 | DA03 | DA04 | DA05 | DA06 | DA07 | DA08 | DA09 | DA10 | |
| . characterised by time regions | . . constant in modulation signal phases | . . . Level shifts of two amplification levels | . . . Continuation of two amplification levels | . . . having three or more amplification levels | . . changed in modulated signal phases | . . . having one amplification level | . . . having two amplification levels | . . . having three or more amplification levels | . . code-converting before modulation | |||
| DA11 | DA12 | DA13 | DA14 | DA15 | ||||||||
| . . in burst | . . synchronised in modulation signals with carrier waves | . characterised by frequency regions | . . in single-sideband or SSB | . . in vestigial sideband or VSB | ||||||||
| DB | DB00 SYSTEMS TRANSMITTING TRANSMISSION CONTROL SIGNALS |
DB01 | DB02 | DB03 | ||||||||
| . transmitting warning signals | . transmitting automatic gain control or AGC signals | . transmitting strobe signals | ||||||||||
| DC | DC00 RELIABILITY IMPROVEMENT IN ASK SYSTEMS |
DC01 | DC02 | DC03 | DC04 | DC05 | DC06 | |||||
| . Monitoring or experimentation | . . during communication | . . during non-communication | . Measuring | . Error detection correction or prevention | . . Removal of noise | |||||||
| DD | DD00 MODULATORS IN ASK SYSTEMS |
DD01 | DD02 | DD03 | DD04 | DD05 | ||||||
| . attenuating outputs of oscillators | . stopping operations of oscillators | . using exclusive OR gates | . using microwave elements | . using digital operation process | ||||||||
| DE | DE00 MODULATOR-ATTACHED CIRCUITS IN ASK SYSTEMS |
DE01 | ||||||||||
| . Offset voltage removal circuits | ||||||||||||
| DF | DF00 DEMODULATORS IN ASK SYSTEMS |
DF01 | DF02 | DF03 | DF04 | |||||||
| . using repeat trigger circuits | . using digital operation process | . using synchronous phase detection | . using envelope phase detection. | |||||||||
| DG | DG00 DEMODULATOR-ATTACHED CIRCUITS IN ASK SYSTEMS |
DG01 | DG02 | DG03 | DG04 | |||||||
| . Equalization circuits or automatic gain control circuits | . Threshold control circuits | . Hump-removing circuits | . Carrier regeneration circuits | |||||||||
| EA | EA00 SYSTEMS CHARACTERISED BY THE FORM OF MODULATION SIGNALS IN FSK SYSTEMS. |
EA01 | EA02 | EA03 | EA04 | EA05 | EA06 | EA07 | EA08 | EA09 | EA10 | |
| . characterised by time regions | . . in burst | . . continued in phases | . . . having minimum phase shifts or MSK | . . using three or more frequencies | . . using frequency patterns or FPK | . . . using chirp signals | . . making the rear part of one bit zero level | . . synchronised in carrier waves with modulation signals | . characterised by frequency regions | |||
| EA11 | ||||||||||||
| . . Band-narrowing | EB | EB00 SYSTEMS TRANSMITTING TRANSMISSION CONTROL SIGNALS |
||||||||||
| EC | EC00 REMOVAL OF FREQUENCY VARIATIONS IN FSK SYSTEMS |
EC01 | ||||||||||
| . Return of frequency deviation signals | ||||||||||||
| ED | ED00 RELIABILITY IMPROVEMENT IN FSK SYSTEMS |
ED01 | ED02 | ED03 | ED04 | ED05 | ED06 | |||||
| . Monitoring or experimentation | . . performing during communication | . . performing during non-communication | . Measuring | . Error detection correction or prevention | . . Removal of static noise | |||||||
| EE | EE00 MODULATORS IN FSK SYSTEMS |
EE01 | EE02 | EE03 | EE04 | EE05 | EE06 | EE07 | EE08 | EE09 | EE10 | |
| . by switching two or more frequency outputs | . . by switching oscillators | . changing time constants | . . variable in capacities | . . variable in resistance | . variable in frequency dividing | . using phase-locked loops | . using digital operation process | . synthesised in vectors | . by inserting and removing pulses | |||
| EF | EF00 MODULATOR-ATTACHED CIRCUITS IN FSK SYSTEMS |
EF01 | EF02 | |||||||||
| . Transmission filters | . AGC circuits | |||||||||||
| EG | EG00 DEMODULATORS IN FSK SYSTEMS |
EG01 | EG02 | EG03 | EG04 | EG05 | EG06 | EG07 | EG08 | EG09 | EG10 | |
| . counting the number of received signal pulses in a fixed time | . directly measuring pulse widths | . . using counters | . . using integrated circuits | . compared with reference pulse widths | . . using mono multivibrators | . using repeat trigger circuits | . by PLL. | . using delayed phase detection | . using filters | |||
| EG11 | EG12 | |||||||||||
| . using digital operation process | . by orthogonal phase detection | |||||||||||
| EH | EH00 MODULATOR-ATTACHED CIRCUITS IN FSK SYSTEMS |
EH01 | EH02 | EH03 | EH04 | EH05 | EH06 | EH07 | ||||
| . Receiving filters | . Equalizing circuits | . Unstable point removal circuits | . Zero cross detection circuits of receiving signals | . Threshold control circuits | . Circuits magnifying frequency shifts | . using frequency conversions | EJ | EJ00 RELAYS IN FSK SYSTEMS |
||||
| FA | FA00 SYSTEMS CHARACTERISED BY MODULATED SIGNALS IN PSK SYSTEMS. |
FA01 | FA02 | FA03 | FA04 | FA05 | FA06 | FA07 | FA08 | FA09 | FA10 | |
| . characterised by time regions | . . fixed in the phase number of modulated waves | . . . having two phases | . . . having three phases | . . . having four phases | . . . having eight phases | . . changed in the number of phases of modulated waves | . . continued | . . in burst | . . imbalanced | |||
| FA11 | FA12 | FA13 | FA14 | FA15 | FA16 | FA17 | FA18 | FA19 | FA20 | |||
| . . characterised by states of phase changes | . . . continued in phases | . . . . for stabilizing amplitudes | . . . discontinued in phases | . . . constant in shift directions | . . . using time offsets | . . . dividing phase points into groups | . . characterised by the relationship between modulation signals and carrier waves | . . . having integers in frequency ratios | . . . having non-integers in frequency ratios | |||
| FA21 | FA22 | FA23 | FA24 | FA25 | FA26 | |||||||
| . . . synchronizing | . . . non-synchronizing | . characterised by frequency regions | . . having double-sided wave bands | . . for establishing narrow bands | . . . in SSB | |||||||
| FB | FB00 SYSTEMS TRANSMITTING TRANSMISSION CONTROL SIGNALS |
FB01 | FB02 | FB03 | FB04 | FB05 | FB06 | |||||
| . transmitting frame synchronization signals | . transmitting speed control signals | . transmitting clock signals | . transmitting carrier wave reference signals | . transmitting equalization signals | . transmitting AGC signals | |||||||
| FC | FC00 RELATIONSHIPS BETWEEN MODULATION SIGNALS AND MODULATED SIGNALS |
FC01 | FC02 | |||||||||
| . having absolute phase | . having differential phase | |||||||||||
| FD | FD00 RELIABILITY IMPROVEMENT IN PSK SYSTEMS. |
FD01 | FD02 | FD03 | FD04 | FD05 | FD06 | |||||
| . Monitoring or experimentation | . . during communication | . . during non-communication | . Measuring | . Error detection correction or prevention | . . Removal of static noise | |||||||
| FE | FE00 THIS PLACE COVERS MODULATORS IN PSK SYSTEMS |
FE01 | FE02 | FE03 | FE04 | FE05 | FE06 | FE07 | FE08 | FE09 | FE10 | |
| . controlling carrier wave paths | . . switching carrier wave polarities | . . by switching reflexion points | . . by switching delay lines | . by switching multi-phase waves | . controlling PLL. | . using pulse operations | . . using pulse insertion and removal | . . using pulse logic circuits | . using digital operation process | |||
| FE11 | FE12 | FE13 | FE14 | |||||||||
| . using vector synthesis | . using special elements | . . using microwave elements | . . using surface acoustic waves (SAW) | |||||||||
| FF | FF00 MODULATOR-ATTACHED CIRCUITS IN PSK SYSTEMS |
FF01 | FF02 | FF03 | FF04 | FF05 | FF06 | |||||
| . Transmission filters | . Transmission logic circuits | . . using parallel process | . False signal-insertion circuits | . Modulation distortion removal or equalization circuits | . . Bias control | |||||||
| FG | FG00 DEMODULATORS IN PSK SYSTEMS |
FG01 | FG02 | FG03 | FG04 | FG05 | ||||||
| . using pulse operations | . using digital operation process | . by delayed phase-detection | . using correlations | . using specific elements | ||||||||
| FH | FH00 DEMODULATOR-ATTACHED CIRCUITS IN PSK SYSTEMS EXCEPT CARRIER REGENERATION |
FH01 | FH02 | FH03 | FH04 | FH05 | FH06 | FH07 | FH08 | FH09 | FH10 | |
| . Receiving filters | . Receiving logic (differential) circuits | . Equalization circuits | . AGC circuits | . Jitter correction circuits | . . in base bands | . . in carrier bands | . Clock regeneration circuits and synchronous regeneration circuits | . Phase ambiguity removal circuits | . Region determination circuits | |||
| FJ | FJ00 BASE BAND PROCESS PSK CARRIER REGENERATION. |
FJ01 | FJ02 | FJ03 | FJ04 | FJ05 | FJ06 | FJ07 | FJ08 | FJ09 | FJ10 | |
| . Regeneration systems | . . using exclusive OR gates | . . . using differences | . . . using sums | . . using sums and differences | . . . using products | . . using products and differences | . . using squares | . . using eye pattern | . . using negative resistance | |||
| FJ11 | FJ12 | FJ13 | FJ14 | FJ15 | FJ16 | FJ17 | FJ18 | FJ19 | ||||
| . Attached circuits | . . phase-detecting by phase rotation | . . differentiating phase errors | . . Phase slip detection correction and prevention circuits | . . holding PLL control signals | . Stationary phase error removal circuits | . . Phase adjustment circuits of regeneration carriers | . False synchronization prevention circuits | . Unstable phase removal circuits | ||||
| FK | FK00 CARRIER BAND PROCESS PSK CARRIER REGENERATION |
FK01 | FK02 | FK03 | FK04 | FK05 | FK06 | FK07 | FK08 | FK09 | FK10 | |
| . Regeneration systems | . . Reverse modulation systems | . . Repeated modulation systems | . . Multiplication systems | . . . Multiplication circuits | . Attached circuits | . . Band-width variable filters | . . Tracking filters | . . . using frequency conversion. | . . . Core frequency variable filter | |||
| FK11 | FK12 | FK13 | FK14 | FK15 | FK16 | FK17 | FK18 | |||||
| . . Jitter removal circuits | . . Asynchronous state detection circuits | . . Phase slip detection correction and prevention circuits | . . holding PLL control signals | . Stationary phase error removal circuits | . . Phase adjustment circuits of regeneration carriers | . False synchronization prevention circuits | . Unstable phase removal circuits | |||||
| FL | FL00 RELAYS IN PSK SYSTEM |
FL01 | FL02 | |||||||||
| . including base band process | . using carrier band process | |||||||||||
| GA | GA00 TRANSMISSION SYSTEMS IN MF SIMULTANEOUS SYSTEMS |
GA01 | GA02 | GA03 | GA04 | GA05 | ||||||
| . using N frequencies among M frequencies | . . using 2 frequencies among 6 frequencies | . . using 2 frequencies among 7 frequencies | . selecting from a plurality of frequency groups | . using frequency conversion | ||||||||
| GB | GB00 TRANSMITTERS IN MF SIMULTANEOUS SYSTEMS |
GB01 | GB02 | |||||||||
| . variable in dividing | . using digital computing process | |||||||||||
| GC | GC00 RECEIVERS USING MF SIMULTANEOUS SYSTEMS |
GC01 | GC02 | GC03 | GC04 | GC05 | GC06 | GC07 | GC08 | GC09 | GC10 | |
| . Detectors | . . using filters | . . . Detection of predetermined frequencies | . . . . using comb-shaped filters | . . . . using SCF | . . . . using digital operation process filters | . . . Detection of filter outputs | . . . . comparing amplitudes with thresholds | . . . . comparing power with thresholds. | . . . . Threshold control | |||
| GC11 | GC12 | |||||||||||
| . . using Fourier conversion | . Attached circuits | |||||||||||
| GD | GD00 THIS PLACE COVERS TRANSMISSION SYSTEMS IN MF SEQUENTIAL SYSTEMS |
GD01 | GD02 | |||||||||
| . carrying information even in continuous time | . Creation of codes by selecting from different groups | |||||||||||
| GE | GE00 TRANSMITTERS IN MF SEQUENTIAL SYSTEMS |
GE01 | GE02 | |||||||||
| . variable in capacity | . by digital operation process | |||||||||||
| GF | GF00 RECEIVERS IN MF SEQUENTIAL SYSTEMS. |
GF01 | GF02 | GF03 | GF04 | GF05 | GF06 | GF07 | GF08 | GF09 | ||
| . Detectors | . . arranged with one filter | . . . converted in frequencies | . . counting the number of received signal pulses in a fixed time | . . directly measuring pulse widths | . . using PLL. | . . using digital operation process | . . using surface acoustic waves or SAW | . Attached circuits | ||||
| GG | GG00 RELIABILITY IMPROVEMENT IN MF SYSTEMS |
GG01 | GG02 | GG03 | GG04 | GG05 | ||||||
| . Monitoring experimentation or measuring | . Error detection correction or prevention | . . using continuous time | . . Removal of interference | . . Check of numbers of waves | ||||||||
| HA | HA00 TRANSMISSION SYSTEMS BY COMPOSITE MODULATION EXCEPT APK |
HA01 | HA02 | HA03 | ||||||||
| . using FSK and PSK | . using ASK and PSK | . using PSK and PSK | ||||||||||
| JA | JA00 SYSTEMS CHARACTERISED BY CONFIGURATIONS OF MODULATED SIGNALS IN APK SYSTEMS |
JA01 | JA02 | JA03 | JA04 | JA05 | JA06 | JA07 | JA08 | JA09 | JA10 | |
| . characterised by time regions | . . formed into lattice shapes | . . . having 16 values | . . concentric | . . in burst | . . not uniform in probability distributions | . . using time offsets. | . . dividing signals into groups | . characterised by frequency regions | . . transmitting carrier components of predetermined levels | |||
| JB | JB00 SYSTEMS TRANSMITTING TRANSMISSION CONTROL SIGNALS |
JB01 | ||||||||||
| . transmitting frame synchronous signals | ||||||||||||
| JC | JC00 RELATIONSHIPS OF MODULATION SIGNALS AND MODULATED SIGNALS |
JC01 | JC02 | |||||||||
| . having absolute phase variants | . having differential phase variants | |||||||||||
| JD | JD00 RELIABILITY IMPROVEMENT IN APK SYSTEMS. |
JD01 | JD02 | JD03 | JD04 | JD05 | JD06 | JD07 | ||||
| . Monitoring or experimentation | . . performing during communication | . . performing during non-communication | . Measuring | . Error detection correction or prevention | . . Removal of static noise | . using code conversion | ||||||
| JE | JE00 MODULATORS IN APK SYSTEMS |
JE01 | JE02 | JE03 | JE04 | JE05 | JE06 | |||||
| . adding two or more phase shift PSK signals | . Cascade connection of PSK and ASK | . using digital operation process | . using vector synthesis | . . having two vectors | . . having three vectors | |||||||
| JF | JF00 MODULATOR-ATTACHED CIRCUITS IN APK SYSTEMS |
JF01 | JF02 | JF03 | JF04 | JF05 | JF06 | |||||
| . Transmission logic circuits | . . Finite sum conversion circuits | . . Phase point allotment conversion circuits | . Modulation distortion removal or equalization circuits | . Temperature compensation circuits | . . Bias control circuits | |||||||
| JG | JG00 DEMODULATORS IN ASK SYSTEMS. |
JG01 | ||||||||||
| . using digital operation process | ||||||||||||
| JH | JH00 DEMODULATOR-ATTACHED CIRCUITS IN APK SYSTEMS EXCEPT CARRIER REGENERATION |
JH01 | JH02 | JH03 | JH04 | JH05 | JH06 | |||||
| . Receiving logic circuits | . Equalization circuits | . AGC circuits | . Jitter correction circuits | . Clock regeneration circuits | . Region determination circuits | |||||||
| JJ | JJ00 CARRIER REGENERATION IN APK SYSTEMS |
JJ01 | JJ02 | JJ03 | JJ04 | JJ05 | JJ06 | JJ07 | JJ08 | JJ09 | JJ10 | |
| . Regeneration systems | . . using base band process | . . . using exclusive OR gates | . . . . using sums | . . . using digital operation process | . . . . using ROM | . . . using only specific signal points | . . . converting to specific phases | . . . discriminating error directions | . . . comparing average values of orthogonal components and the same phase components | |||
| JJ11 | JJ12 | JJ13 | JJ14 | JJ15 | JJ16 | |||||||
| . . by carrier band process | . Attached circuits | . . holding PLL control signals | . . imposing loads on control signals with amplitude differences of receiving signals | . Enlargement of lead-in ranges | . Prevention of false synchronization |