H04J - CPC Classification

• H04J1/00 » Frequency-division multiplex systems 131
• H04J11/00 » Orthogonal multiplex systems, {e.g. using WALSH codes} 1,2K
• H04J13/00 » Code division multiplex systems 517
• H04J14/00 » Optical multiplex systems 264
• H04J15/00 » Multiplex systems not otherwise provided for 118
• H04J2203/00 » Aspects of optical multiplex systems other than those covered by 4
• H04J2211/00 » Orthogonal indexing scheme relating to orthogonal multiplex systems 2
• H04J3/00 » Time-division multiplex systems 254
• H04J4/00 » Combined time-division and frequency-division multiplex systems 125
• H04J7/00 » Multiplex systems in which the amplitudes or durations of the signals in individual channels are characteristic of those channels 32
• H04J9/00 » Multiplex systems in which each channel is represented by a different type of modulation of the carrier 23