H
ELECTRICITY
H
ELECTRICITY
H04
ELECTRIC COMMUNICATION TECHNIQUE
H04
ELECTRIC COMMUNICATION TECHNIQUE
H04L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
27/00
Modulated-carrier systems
27/00
Modulated-carrier systems
H04L27/26
Systems using multi-frequency codes
H04L27/26
Systems using multi-frequency codes
H04L27/2601
Multicarrier modulation systems
H04L27/2601
Multicarrier modulation systems