IPC Definitions - January 01, 2012
H04B 1/69 - Definition
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.
Attention is drawn to the following places, which may be of interest for search:
Code multiplexing | H04J 13/00 |
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. |
UWB | ultra-wideband |