H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/66 (2006.01) H04B 1/707 (2006.01)
Patent
CA 2042608
The spread spectrum signal (S1) is converted into a digital binary signal (S2) having one binary character, and this binary signal is applied to several parallel detector circuits (10) each of which detects a distinct code position. Each detector circuit (10) simultaneously receives a phase-shifted version of a binary reference code (CR) and produces a signal (B3) which has a first binary state when the received signal corresponds to the code position of the detector circuit, and has a second binary state when this is not the case. The output signals (B3) are combined and/or coded in order to identify the correct code position for demodulating the received signal. The invention is used in communication systems receivers.
2042608 9106155 PCTABS00105 Le signal à spectre étalé (S1) est converti en signal binaire quantifié (S2) à un élément binaire, et ce signal binaire est appliqué à plusieurs circuits de détection (10) en parallèle, chacun de ces circuits de détection étant destiné à détecter une position de code distincte. Chaque circuit de détection (10) reçoit simultanément une version décalée d'un code de référence binaire (CR) et produit un signal (B3) ayant un premier état binaire lorsque le signal reçu correspond à la position de code du circuit de détection et ayant un second état binaire dans le cas contraire. Les signaux de sortie (B3) sont combinés et/ou codés pour identifier la position de code correcte afin de démoduler le signal reçu. L'invention est utilisée dans les récepteurs des systèmes de communications.
Agence Spatiale Europeenne
Dennison Associates
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