中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

37 records (took 0.028 seconds)

    21.
    发明专利
    未知

    公开(公告)号：DE60319832D1

    公开(公告)日：2008-04-30

    申请号：DE60319832

    申请日：2003-10-13

    Applicant: ST MICROELECTRONICS SRL

    Inventor： VISALLI GIUSEPPE ,  PAPPALARDO FRANCESCO ,  AVELLONE GIUSEPPE ,  RIMI FRANCESCO ,  GALLUZZO AGOSTINO

    IPC: H03M13/25 ,  H04L1/00 ,  H04L25/06 ,  H04L27/00 ,  H04L27/227 ,  H04L27/233

    Abstract: A phase recovery and decoding method for decoding signals (S'(t)) comprising encoded symbols (uk) over a respective symbol interval (T) which modulate a carrier, for example in a TCM system. The method envisages performing (20 to 26) a phase locking of the signal to be decoded so as to obtain a phase-locked signal which can present, during each symbol interval (T), variations induced by disturbances (noise, fading, etc.). The value attributed to the decoded symbol (Uk) is a function of the value assumed by the phase-locked signal on at least one subinterval of the symbol interval (T), for example located at the end of the symbol interval (T). Alternatively, the value assumed by the phase-locked signal on a plurality of subintervals comprised in each symbol interval (T) is detected (24,32), and a respective majority value of said phase-locked signal within said plurality of subintervals is identified (34,36). A suitable phase recovery and decoding circuit comprises a phase comparator (20), hard decision means (24), an encoder circuit (26), an oscillator (22) and a selection unit (28). For determining decoded value (Uk) and updating the state of the encoder circuit.

    28.
    发明专利
    未知

    公开(公告)号：DE60221396D1

    公开(公告)日：2007-09-06

    申请号：DE60221396

    申请日：2002-09-25

    Applicant: ST MICROELECTRONICS SRL

    Inventor： PAPPALARDO FRANCESCO ,  NOTARANGELO GIUSEPPE

    IPC: G06F13/42 ,  G06F13/40

    Abstract: The process involves comparing bit by bit in orderly sequence to identify a set of bits that are not changed and another set of bits that are changed in context of a signal to be transmitted on a bus at an instant and preceding instant. Transmission of signal bus in non-encoded format and in encoded format, and the limitation of bits are decided. Independent claims are also included for the following: (1) an encoder for transmitting digital signals at given instants on a bus (2) a decoder for receiving digital signals transmitting on a bus (3) a computer program product directly loadable into the memory of a computer and comprising a software code portions for implementing digital signal transmitting process.

    30.
    发明专利
    未知

    公开(公告)号：DE60306894T2

    公开(公告)日：2007-02-15

    申请号：DE60306894

    申请日：2003-05-07

    Applicant: ST MICROELECTRONICS SRL

    Inventor： RIMI FRANCESCO ,  PAPPALARDO FRANCESCO ,  AVELLONE GIUSEPPE ,  GALLUZZO AGOSTINO

    IPC: H04B1/707

    Abstract: In order to execute the cell-search procedure in a cellular communication system (such as a system based upon the 3GPP TDD standard), there are available identification codes for the second step (slot synchronization) and for the third step (identification of the scrambling codes). Said identification codes are identified by means of a process of correlation with the received signal and are used for obtaining from a correspondence table the parameters for the execution of the second step (CD) or of the third step (SCR). The correspondence table is stored in a reduced form by means of the identification, according to rules of symmetry and redundancy, of subtables designed to generate the entire table by means of appropriate combination operations. The search procedure in the correspondence table thus reduced is conveniently modified by means of the introduction of said combination operations. A preferential application is in mobile communication systems based upon standards, such as UMTS, CDMA2000, IS95 or WBCDMA.

Patent Agency Ranking