Pulse or digital communications – Synchronizers
Reexamination Certificate
2007-04-02
2010-11-23
Tran, Khai (Department: 2611)
Pulse or digital communications
Synchronizers
C375S365000
Reexamination Certificate
active
07839962
ABSTRACT:
The present invention relates to a method for synchronizing a signal frame transmitted by a transmitter of a telecommunication system to a receiver adapted to synchronize said signal frame from a synchronization sequence included in said signal frame. The method is characterized in that it includes:a synchronization sequence generation step (100) intended to be executed by the transmitter in the course of which the synchronization sequence (xi(k)) is formed by the concatenation of a first and a second bursts of L complementary sequences, said first burst of L sequences being obtained by the concatenation of L times a first N pulses complementary sequence (A) of a pair of complementary sequences ((A,B)), said second burst of L sequences being obtained by the concatenation of L times a second N pulses complementary sequence (B) of said pair of complementary sequences, anda sequence weighting step (200) intended to be executed by the transmitter in the course of which the pulses of each complementary sequence (A) of rank q of the first burst of L sequences are multiplied by the component of rank q of a L components long weighting code (MCi) belonging to a set of I weighting codes known by the receiver (RCD) beforehand, and the pulses of each sequence of rank q of the second burst of L sequences are multiplied by the same component of rank q of said weighting code (MCi).
REFERENCES:
patent: 2002/0165003 (2002-11-01), Rudolf et al.
patent: WO 00/54424 (2000-09-01), None
S.L. Maskara, et al., “Concatenated Sequences for Spread Spectrum Systems”, IEEE Transactions on Aerospace and Electronic Systems, IEEE Service Center, vol. AES-17, No. 3, XP-000791008, ISSN: 0018-9251, May 1981, pp. 342-350.
S. Z. Budisin, “New Complementary Pairs of Sequences”, 8030 Electronics Letters, Stevenage, Herts.. GB, vol. 26, No. 13, XP 000107922, ISSN: 0013-5194, Jun. 21, 1990, 4 Pages.
“New RACH Preambles with Low Auto-Correlation Sidelobes And Reduced Detector Complexity”,Ericsson, 0 TSG-RAN Working Group 1 Meeting No. 3, XP002901242, Mar. 22-26, 1999, pp. 1-8.
Brunel Loic
Jechoux Bruno
Mitsubishi Electric Corporation
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Tran Khai
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