IPC Definitions - January 01, 2012

H04B 1/69 - Definition fr

Definition statement

This group covers:

Spread-spectrum techniques representing methods by which communication energy generated in a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth.

Relationship between large subject matter areas

With regard to code multiplexing, the borderline between H04B 1/69 and H04J 13/00 should be determined based on whether the features relevant for classification are focused on the code multiplexing aspects or the implementation of the spread-spectrum technique (e.g. details of how the signals are physically transmitted, received and processed).

Documents classified in H04B 1/69 containing aspects of code multiplexing of interest for search, may also be classified in group H04J 13/00.

Informative references

Attention is drawn to the following places, which may be of interest for search:

Code multiplexing

H04J 13/00

Glossary of terms

In this group, the following terms or expressions are used with the meaning indicated:

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.

Synonyms and Keywords

UWB

ultra-wideband