Procedure for the estimation of parameters of a CDMA-signal

Details Procedure for the estimation of parameters of a CDMA-signal Procedure for the estimation of parameters of a CDMA-signal

2007-05-08

2007-05-08

Kizou, Hassan (Department: 2616)

Multiplex communications

Diagnostic testing

Determination of communication parameters

C370S342000, C370S470000, C370S479000

Reexamination Certificate

active

10209708

ABSTRACT:
The invention concerns a procedure for the estimation of unknown parameters (Δω, Δφ, ε,gasync,gbcode) of a received CDMA-signal (rdesc(v)) which is transmitted by means of a transmission channel (11), in which the CDMA-signal has experienced changes to the parameters (Δω,Δφ,ε,gbsync,gbcode) with the following steps: (a) formation of a cost function (L), which is dependent on the estimated values (Δ{tilde over (ω)},Δ{tilde over (φ)},{tilde over (ε)}, . . . ) of combined unknown parameters (Δω,Δφ,ε, . . . ); (b) partial differentiation of the cost function in respect to the said estimate values (Δ{tilde over (ω)},Δ{tilde over (φ)},{tilde over (ε)}, . . . ) of the unknown parameters (Δω,Δφ,ε, . . . ); (c) formation of a matrix-vector-equationfrom the presupposition that all partial differentials of the cost function are zero and thus a minimum of the cost function exists, and (d) computation of at least some of the matrix elements of the matrix elements of the matrix-vector-equation with the use of the Fast-Hadamard-Transformation.

REFERENCES:
patent: 7133394 (2006-11-01), De et al.
patent: 43 02 679 (1994-08-01), None

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