Back to results
US 7,609,903 B2Granted
Spread spectrum signal demodulating method and apparatus
AssigneeSony Corporation
InventorKatsuyuki Tanaka
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeSony Corporation
InventorKatsuyuki Tanaka
Estimating the term…
A spread spectrum signal demodulating method whereby spread-code synchronous acquisition and carrier synchronous acquisition are performed using FFT at high speed, wherein a received signal, of which the carrier wave is modulated with a signal obtained by spectrum-spreading data with a spread code, is subjected to the FFT and the result of the FFT is stored in a first memory. The FFT result of the received signal stored in the first memory and the result of FFT of the spread code stored in a second memory are read out and multiplied to detect the correlation between the received signal and the spread code. A readout address of either the FFT result of the received signal or the FFT result of the spread code is shifted by an amount corresponding to a carrier frequency of the received signal.
A spread spectrum signal demodulating method comprising the steps of:
A spread spectrum signal demodulating method comprising the steps of:
A spread spectrum signal demodulating apparatus comprising:
A spread spectrum signal demodulating apparatus comprising:
Dependencies are inferred from the claim text.