Apparatus and method for detecting code of direct sequence spread spectrum signal
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorYoungha Cho
Life of this patent
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Abstract
Provided is an apparatus and method for detecting a code of a direct sequence spread spectrum signal obtained by spreading data in a direct sequence spread spectrum method with a predetermined code to despread the direct sequence spread spectrum signal. The apparatus includes an analog-digital (AD) converter, a serial-to-parallel converter, a triple correlator, a data dependency remover, and a mean value calculator. Herein, the code used for the spreading of the spread spectrum signal is detected by using a set of discrete time delay sequence pairs that the mean correlation function value outputted from the mean value calculator becomes a maximum.
Claims15
An apparatus for detecting a code from a direct sequence spread spectrum signal obtained by spreading data in a direct sequence spread spectrum method with a predetermined code to despread the direct sequence spread spectrum signal, comprising:
- an analog-digital (AD) converter for converting the direct sequence spread spectrum signal into a discrete signal at a predetermined sampling rate;
- a serial-to-parallel converter for windowing the discrete signal into signals of a predetermined length at least once;
- a triple correlator for calculating triple correlation function values of the windowed discrete signals by using an arbitrary discrete time delay;
- a data dependency remover for removing data dependency caused by the data from the multiple triple correlation function values outputted from the triple correlator;
- and
- a mean value calculator for calculating a mean value of the multiple correlation function values without data dependency outputted from the data dependency remover,
- wherein the code used for the spreading of the spread spectrum signal is detected by using a set of discrete time delay sequence pairs that the mean correlation function value outputted from the mean value calculator becomes a maximum.
A method for detecting a code from a direct sequence spread spectrum signal obtained by spreading data in a direct sequence spread spectrum method with a predetermined code to despread the direct sequence spread spectrum signal, comprising the steps of:
- a) converting the direct sequence spread spectrum signal into a discrete signal at a predetermined sampling rate;
- b) windowing the discrete signal into signals of a predetermined length at least once;
- c) calculating triple correlation function values of the windowed discrete signals by using an arbitrary discrete time delay;
- d) removing data dependency caused by the data from the multiple triple correlation function values;
- and
- e) calculating a mean value of the multiple correlation function values without data dependency,
- wherein the code used for the spreading of the spread spectrum signal is detected by using a set of discrete time delay sequence pairs that the mean correlation function value becomes a maximum.
Dependencies are inferred from the claim text.