Patent ID: 7233586

Claim:
A process for determining a length (L preamble ) of a standard code sequence (preamble) transmitted in a CDMA signal in a defined code channel code class (CC preamble ) than the code class (CC data ) and having at least one code channel, in which before and/or after the standard code sequence, data are transmitted, wherein said process has the following steps: a) determination of a chip sequence of the CDMA signal in accord with an assumed hypothetical length (L hyp ) of the standard code sequence, b) generation of a symbol-sequence by decoding of the chip sequence with a code (w 5 CN (v)) of at least one of the standard code sequence non-occupied analysis code channel, which has the same code class (CC preamble ) as the code channel of the standard code sequence; c) determination of an estimated value of a performance ({circumflex over (P)} hyp ) of the symbol sequence, wherein the performance corresponds to the hypothetical length (L hyp ) of the standard code sequence; d) determine, as to whether or not, the estimated value of the performance ({circumflex over (P)} hyp ) of the symbol sequence of the assumed hypothetical length (L hyp ) of the standard code sequence understeps a predetermined threshold value; e) for the case, that the estimated value of the performance ({circumflex over (P)} hyp ) of the symbol sequence of the assumed hypothetical length (L hyp ), of the standard code sequence, understeps the predetermined threshold value, make the decision that the assumed hypothetical length (L hyp ) of the standard code sequence is correct; f) for the case, that the estimated value of the performance ({circumflex over (P)} hyp ) of the symbol sequence of the assumed hypothetical length (L hyp ), of the standard code sequence does not understep the predetermined threshold value, undertake successive repetition of steps a) to e) with successively lesser assumed hypothetical lengths (L hyp ) of the standard code sequence; and g) decoding the CDMA signal based on the determined hypothetical length (L hyp ) of the standard code sequence.