| US 7,574,184 B2 | ||
| Method and device for detecting occupation by a signal of an adjacent channel | ||
| Dirk Haentzschel, Duerroehrsdorf-Dittersbach (Germany); Eric Sachse, Dresden (Germany); and Michael Schmidt, Dresden (Germany) | ||
| Assigned to Atmel Germany GmbH, Heilbronn (Germany) | ||
| Filed on Aug. 31, 2006, as Appl. No. 11/513,257. | ||
| Claims priority of application No. 10 2005 041 503 (DE), filed on Sep. 01, 2005. | ||
| Prior Publication US 2007/0047682 A1, Mar. 01, 2007 | ||
| Int. Cl. H04B 1/10 (2006.01) | ||
| U.S. Cl. 455—226.1 [455/296; 375/348] | 26 Claims |
| 1. A method for detecting occupation of an adjacent channel by a signal with a complex-valued bandpass signal having an information
channel component and/or an adjacent channel component, the method comprising the steps of:
deriving a real-valued bandpass signal in that the complex-valued bandpass signal is filtered and a real component is produced
from the filtered signal;
transposing the real-valued bandpass signal into a first baseband signal;
filtering the first baseband signal so spectral components influenced by the information channel component are suppressed
to provide a first filtered signal;
evaluating the first filtered signal; and
generating a binary occupation signal to indicate the occupation of the adjacent channel as a function of the evaluated first
filtered signal.
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