Spread spectrum techniques

Introduced: January 1995

Last revised: January 2011

Full Title

Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission > Spread spectrum techniques

Classification Context

Section:: ELECTRICITY
Class:: ELECTRIC COMMUNICATION TECHNIQUE
Subclass:: TRANSMISSION

Additional Content

RAKE A receiver comprising sub-receivers called fingers wherein each finger detects a single multipath component. The contributions of the fingers can be combined at a later stage.

Related Keywords

SPREAD spectrum techniques in general

4 direct subcodes

Child Classifications

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H04B 1/692 Hybrid techniques using combinations of two or more spread spectrum techniques
H04B 1/707 using direct sequence modulation
H04B 1/713 using frequency hopping
H04B 1/7163 using impulse radio

Top Applicants

Top 10 applicants by patent filingsfor class H04, 2013–2023, worldwide · Source: EPO PATSTAT

QUALCOMM US 97,396
HUAWEI TECHNOLOGIES COMPANY CN 96,502
SAMSUNG ELECTRONICS COMPANY KR 86,981
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) SE 55,869
HUAWEI TECHNOLOGIES COMPANY 55,349
LG ELECTRONICS KR 53,649
CANON 33,341
SONY CORPORATION JP 32,761
ZTE CORPORATION CN 32,274
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 28,327