中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

36 records (took 0.024 seconds)

    Channel estimation using soft-decision feedback
    32.
    发明专利
    Channel estimation using soft-decision feedback 未知

    公开(公告)号：AU722419B2

    公开(公告)日：2000-08-03

    申请号：AU2400899

    申请日：1999-04-27

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： LUSCHI CARLO ,  MUJTABA SYED AON ,  SANDELL MAGNUS ,  STRAUCH PAUL EDWARD ,  YAN RAN-HONG ,  BRINK STEPHAN TEN

    IPC: H04L27/01 ,  H04L25/02 ,  H04B1/10 ,  H04B7/005

    Abstract: A method of estimating channel impulse response in a signal transmitted over a channel in a communication system is described. The channel estimator obtains a priori knowledge about the transmitted signal, and then uses the transmitted signal and the a priori knowledge to choose an estimate of channel impulse response which minimizes the expected distance between the transmitted signal and a reconstructed signal. The expected distance that is minimized is a cost function, represented by E{∥r-Bh∥2r}. By using soft decision feedback, the invention minimizes erroneous decision feedback which can cause error propagation. The decisions are usually in the form of log likelihood ratios (LLR).

    CHANNEL ESTIMATION USING SOFT-DECISION FEEDBACK
    34.
    发明专利
    CHANNEL ESTIMATION USING SOFT-DECISION FEEDBACK 未知

    公开(公告)号：CA2269580A1

    公开(公告)日：1999-10-30

    申请号：CA2269580

    申请日：1999-04-20

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： STRAUCH PAUL EDWARD ,  YAN RAN-HONG ,  MUJTABA SYED AON ,  SANDELL MAGNUS ,  TEN BRINK STEPHAN ,  LUSCHI CARLO

    IPC: H04L27/01 ,  H04L25/02 ,  H04L1/20 ,  H04Q7/34

    Abstract: A method of estimating channel impulse response in a signal transmitted over a channel in a communication system is described. The channel estimator obtains a priori knowledge about the transmitted signal and then use the transmitted signal and the a priori knowledge to choose an estimate of channel impulse response which minimises the expected distance between the transmitted signal and a reconstructed signal. The expected distance that is minimised is a cost function; represented by E{¦¦r-Bh¦¦2r).. By using soft decision feedback, the invention minimises erroneous decision feedback which can cause error propagation. The decision are usually in the form of log likelihood ratios (LLR).

Patent Agency Ranking