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    Detection, avoidance and/or correction of problematic puncturing patterns in parity bit streams used when implementing turbo codes
    31.
    发明专利
    Detection, avoidance and/or correction of problematic puncturing patterns in parity bit streams used when implementing turbo codes 未知

    公开(公告)号：AU2008258196B2

    公开(公告)日：2009-08-13

    申请号：AU2008258196

    申请日：2008-12-17

    Applicant: INTERDIGITAL TECH CORP

    Inventor： PIETRASKI PHILIP J ,  STERNBERG GREGORY S

    IPC: H03M13/00 ,  H03M13/29

    Abstract: Detecting, avoiding and/or correcting problematic puncturing patterns in parity bit streams used when implementing punctured Turbo codes is achieved without having to avoid desirable code rates. This enables identification/avoidance of regions of relatively poor Turbo code performance. Forward error correction comprising Turbo coding and puncturing achieves a smooth functional relationship between any measure of performance and the effective coding rate resulting from combining the lower rate code generated by the Turbo encoder (600) with puncturing of the parity bits. In one embodiment, methods to correct/avoid degradations due to Turbo coding are implemented by puncturing interactions when two or more stages of rate matching (610, 620) are employed.

    Detection, avoidance and/or correction of problematic puncturing patterns in parity bit streams used when implementing turbo codes
    32.
    发明专利
    Detection, avoidance and/or correction of problematic puncturing patterns in parity bit streams used when implementing turbo codes 未知

    公开(公告)号：AU2007200808A1

    公开(公告)日：2007-03-15

    申请号：AU2007200808

    申请日：2007-02-23

    Applicant: INTERDIGITAL TECH CORP

    Inventor： STERNBERG GREGORY S ,  PIETRASKI PHILIP J

    IPC: H03M13/00 ,  H03M13/29

    Abstract: Detecting, avoiding and/or correcting problematic puncturing patterns in parity bit streams used when implementing punctured Turbo codes is achieved without having to avoid desirable code rates. This enables identification/avoidance of regions of relatively poor Turbo code performance. Forward error correction comprising Turbo coding and puncturing achieves a smooth functional relationship between any measure of performance and the effective coding rate resulting from combining the lower rate code generated by the Turbo encoder (600) with puncturing of the parity bits. In one embodiment, methods to correct/avoid degradations due to Turbo coding are implemented by puncturing interactions when two or more stages of rate matching (610, 620) are employed.

    DETECTION, AVOIDANCE AND/OR CORRECTION OF PROBLEMATIC PUNCTURING PATTERNS IN PARITY BIT STREAMS USED WHEN IMPLEMENTING TURBO CODES
    34.
    发明专利
    DETECTION, AVOIDANCE AND/OR CORRECTION OF PROBLEMATIC PUNCTURING PATTERNS IN PARITY BIT STREAMS USED WHEN IMPLEMENTING TURBO CODES 未知

    公开(公告)号：HK1085852A1

    公开(公告)日：2006-09-01

    申请号：HK06103200

    申请日：2006-03-13

    Applicant: INTERDIGITAL TECH CORP

    Inventor： PIETRASKI PHILIP J ,  STERNBERG GREGORY S

    IPC: H03M20090101 ,  H03M13/00 ,  H03M13/29

    Abstract: Detecting, avoiding and/or correcting problematic puncturing patterns in parity bit streams used when implementing punctured Turbo codes is achieved without having to avoid desirable code rates. This enables identification/avoidance of regions of relatively poor Turbo code performance. Forward error correction comprising Turbo coding and puncturing achieves a smooth functional relationship between any measure of performance and the effective coding rate resulting from combining the lower rate code generated by the Turbo encoder (600) with puncturing of the parity bits. In one embodiment, methods to correct/avoid degradations due to Turbo coding are implemented by puncturing interactions when two or more stages of rate matching (610, 620) are employed.

    35.
    发明专利
    未知

    公开(公告)号：NO20062435L

    公开(公告)日：2006-08-02

    申请号：NO20062435

    申请日：2006-05-29

    Applicant: INTERDIGITAL TECH CORP

    Inventor： STERNBERG GREGORY S ,  YANG RUI ,  LI BIN ,  PIETRASKI PHILIP J

    IPC: H04L25/02 ,  H04L1/00 ,  H04L1/20 ,  H04L12/66 ,  H04Q7/28

    Abstract: A method and apparatus for estimating and reporting the quality of a wireless communication channel between a wireless transmit/receive unit (WTRU) and a Node-B. A modulated signal is received from the Node-B over the communication channel and a channel estimation is performed on the modulated signal to provide a channel estimate. In one embodiment, the modulated signal is demodulated based on the channel estimate to provide a demodulated signal and a signal-to-interference (SIR) estimate based on the demodulated signal is obtained. The quality of the communication channel is estimated based on at least the SIR estimate. In an alternate embodiment, a SIR estimate based on the channel estimate is obtained. The quality of the communication channel is estimated based on the SIR estimate and additional information including at least one of delay spread, transmit power and WTRU velocity information.

    36.
    发明专利
    未知

    公开(公告)号：NO20053329L

    公开(公告)日：2005-09-15

    申请号：NO20053329

    申请日：2005-07-07

    Applicant: INTERDIGITAL TECH CORP

    Inventor： PIETRASKI PHILIP J ,  STERNBERG GREGORY S

    IPC: H03M13/00 ,  H03M13/29 ,  H03M13/35 ,  H03M13/27

    Abstract: Detecting, avoiding and/or correcting problematic puncturing patterns in parity bit streams used when implementing punctured Turbo codes is achieved without having to avoid desirable code rates. This enables identification/avoidance of regions of relatively poor Turbo code performance. Forward error correction comprising Turbo coding and puncturing achieves a smooth functional relationship between any measure of performance and the effective coding rate resulting from combining the lower rate code generated by the Turbo encoder (600) with puncturing of the parity bits. In one embodiment, methods to correct/avoid degradations due to Turbo coding are implemented by puncturing interactions when two or more stages of rate matching (610, 620) are employed.

    METHOD FOR ESTIMATING SIGNAL MAGNITUDE, NOISE POWER, AND SIGNAL-TO-NOISE RATIO OF RECEIVED SIGNALS
    38.
    发明专利
    METHOD FOR ESTIMATING SIGNAL MAGNITUDE, NOISE POWER, AND SIGNAL-TO-NOISE RATIO OF RECEIVED SIGNALS 未知

    公开(公告)号：CA2538144A1

    公开(公告)日：2005-03-31

    申请号：CA2538144

    申请日：2004-08-24

    Applicant: INTERDIGITAL TECH CORP

    Inventor： PIETRASKI PHILIP J ,  LI BIN ,  STERNBERG GREGORY S

    IPC: H04L27/34 ,  H04L1/20 ,  H04L27/38

    Abstract: An improved system and method for estimating one or more parameters, such as amplitude and signal-to-noise ratio, of a received signal, such as an M-QAM or q-ASK signal, is set forth herein. A first embodiment of the invention estimates the amplitude of an M-QAM signal based upon known or ascertainable phase information regarding a plurality of transmitted symbols. A respective set of received symbols corresponding to the plurality of transmitted symbol s is recovered. Each of the plurality of received symbols is multiplied by a complex unit vector with a phase that is opposite in sign to the complex transmitted data symbol to generate a set of products. The set of products i s summed, and the real part of the sum of products is then determined. The absolute values of the known transmitted symbols are summed to generate a total magnitude value. The real part of the sum of products is divided by th e sum of transmitted magnitude values to generate an estimate of the amplitude of the M-QAM signal. Other embodiments of the present invention utilize seco nd- order and fourth-order moments of received samples, a maximum likelihood searching process, or a Kurtosis estimation process to estimate amplitude, noise power, and signal-to-noise ratio of a received signal.

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