CPC Main Group
H04B 1/00 Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
14 direct subcodes
Child Classifications
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- H04B 1/02 Transmitters
- H04B 1/06 Receivers
- H04B 1/38 Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B 1/59 Responders; Transponders
- H04B 1/60 Supervising unattended repeaters
- H04B 1/62 for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
- H04B 1/66 for reducing bandwidth of signals; for improving efficiency of transmission (H04B1/68 takes precedence)
- H04B 1/68 for wholly or partially suppressing the carrier or one side band
- H04B 1/69 Spread spectrum techniques
- H04B 1/72 Circuits or components for simulating antennas, e.g. dummy antennas
- H04B 1/74 for increasing reliability, e.g. using redundant or spare channels or apparatus
- H04B 1/76 Pilot transmitters or receivers for control of transmission or for equalising