CN1736052A

5G,4G

Title

Synchronisation in multicarrier CDMA systems

Application Number:

CN20028024991

Publication Date:

15-02-2006

Current Assignee:

YANXING BIDEKE CO LTD

Family ID:

27488569

Application Date:

15-10-2002

Declaring Company:

APPLE INC , NORTEL NETWORKS LIMITED

Publication Country:

US

Priority Date:

17-10-2001

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Title

Synchronisation in multicarrier CDMA systems

Application Number:

CN20028024991

Family ID:

27488569

Publication Country:

US

Publication Date:

15-02-2006

Application Date:

15-10-2002

Priority Date:

17-10-2001

Current Assignee:

YANXING BIDEKE CO LTD

Declaring Company:

APPLE INC , NORTEL NETWORKS LIMITED

View on Espacenet goto-link

Abstract  Abstract

providing in a OFDM communication system performs synchronization acquisition and cell selection method and device. coarse synchronization is performed to determine a searching window. and then by measuring a signal sampling point of the associated subset to perform fine synchronization with the known value wherein the first signal sample point in the search window. execute the relative process on the frequency domain of the received signal. In a multiple-output OFDM system each antenna of the OFDM transmitter has a unique known value. The known value as pairs of consecutive pilot symbols form to send each pair of pilot symbols transmitted on the same subset of sub-carrier frequencies within the OFDM frame.

A method and apparatus are provided for performing acquisition synchronization and cell selection within an MIMO-OFDM communication system. A coarse synchronization is performed to determine a searching window. A fine synchronization is then performed by measuring correlations between subsets of signal samples whose first signal sample lies within the searching window and known values. The correlations are performed in the frequency domain of the received signal. In a multiple-output OFDM system each antenna of the OFDM transmitter has a unique known value. The known value is transmitted as pairs of consecutive pilot symbols each pair of pilot symbols being transmitted at the same subset of sub-carrier frequencies within the OFDM frame.

A method and apparatus are provided for performing acquisition synchronization and cell selection within an MIMO-OFDM communication system. A coarse synchronization is performed to determine a searching window. A fine synchronization is then performed by measuring correlations between subsets of signal samples whose first signal sample lies within the searching window and known values. The correlations are performed in the frequency domain of the received signal. In a multiple-output OFDM system each antenna of the OFDM transmitter has a unique known value. The known value is transmitted as pairs of consecutive pilot symbols each pair of pilot symbols being transmitted at the same subset of sub-carrier frequencies within the OFDM frame.

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