Receiving method and receiver

Multiplex communications – Communication over free space – Combining or distributing information via code word channels...

Reexamination Certificate

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C370S335000

Reexamination Certificate

active

06865172

ABSTRACT:
The invention relates to a receiving method and a receiver to be used in a cellular radio system. The received signal is FFT transformed and the spreading code of the receiver is FFT transformed in transform means (30). A transformed signal (36) and spreading code (37) are multiplied to provide a product (38) whose phase is shifted by the propagation delay of the signal in shift means (33). After this, a shifted product (39) is IFFT transformed in inverse transform means (34) at the same time as the components of the transmitted signals that have propagated on different paths are combined, whereby the information of the signal can be detected.

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patent: 5629929 (1997-05-01), Blanchard et al.
patent: 5796775 (1998-08-01), Aoyama
patent: 6205166 (2001-03-01), Maruta et al.
patent: 97505 (1996-05-01), None
patent: WO 9524086 (1995-09-01), None
patent: WO 9617446 (1996-06-01), None
“On Multi-Carrier Code Division Multiple Access (MC-CDMA) Modem Design”, IEEE 44th Vehicular Technology Conference, vol. 3, pp. 1670-1674, Jun. 1994.
“Acquisition Performance of a DS/CDMA System in a Mobile Satellite Environment”, IEICE TRANS. COMMUN. vol. E80-B, No. 1, pp. 40-48, Jan. 1997.
Copy of International Search Report for PCT/FI97/00544.

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