Multicode rake receiver in a mobile station
OwnerFrank Heinleinventor
Life of this patent
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Abstract
It is proposed to reduce the outlay in the case of a reception method of a mobile telephone, in particular having a RAKE receiver, for multicode reception of a signal. For this purpose, the code sums (c0+c1) and the code differences (c0−c1) are received and evaluated in such a way that they are alternately processed with a spread factor (SF), in a fashion controlled by a switching signal (s), to form intermediate signals (s'0+1; s'0−1). The useful signal bits (s'0, s'1) are recovered from these intermediate signals by a cross operation (butterfly operation).
Claims8
A reception method for a mobile telephone, in particular having a RAKE receiver, for multicode reception of a useful signal, wherein the code sums (c0, c1) and the code differences (c0−c1) are received and evaluated in such a way that they are alternately processed with a spread factor (SF), in a fashion controlled by a switching signal (s), to form intermediate signals (s'0+1;
- s−0−1), and wherein the useful signal bits (s'0;
- s'1) are recovered from the intermediate signals by a cross operation.
A reception method as claimed in one of the preceding claims, wherein the switching signal (s) is obtained from the codes (c0, c1) via a negating XOR function.
A reception method as claimed in one of the preceding claims, wherein the received signal (r) containing the useful signal bits is multiplied by a code (c0) and integrated and despread via a switchover function controlled by the switching signal (s).
A reception method as claimed in one of the preceding claims, wherein one RAKE receiver each is provided for two codes each in the case of three or more codes.
Dependencies are inferred from the claim text.