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    PAYLOAD SIZE AMBIGUITY AND FALSE ALARM RATE REDUCTION FOR POLAR CODES
    72.
    发明申请
    PAYLOAD SIZE AMBIGUITY AND FALSE ALARM RATE REDUCTION FOR POLAR CODES 审中-公开

    公开(公告)号：US20180331693A1

    公开(公告)日：2018-11-15

    申请号：US15953239

    申请日：2018-04-13

    Applicant: QUALCOMM Incorporated

    Inventor： Huang Lou ,  Jing Jiang ,  Enoch Shiao-Kuang Lu ,  Gabi Sarkis ,  Yang Yang ,  Hari Sankar

    IPC: H03M13/09 ,  H03M13/15

    Abstract: Size ambiguity and false alarm rate reduction for polar codes. A user equipment (UE) may determine a decoding candidate bit sequence for a polar-encoded codeword having a codeword size based on a decoding hypothesis for control information having a particular bit length of multiple different bit lengths for the codeword size. The UE may calculate an error detection code (EDC) value for a payload portion of the decoding candidate bit sequence using an EDC algorithm, and may initialize an EDC variable state with at least one non-zero bit value. Scrambling or interleaving of bits may also be performed prior to, or after, polar encoding and may depend on the bit length. In examples, information bits may be bit-reversed prior to generating an EDC value. In examples, the encoded bits may include multiple EDC values to assist the UE in performing early termination and to reduce a false alarm rate.

    FROZEN BITS BASED PRUNING AND EARLY TERMINATION FOR POLAR DECODING
    73.
    发明申请
    FROZEN BITS BASED PRUNING AND EARLY TERMINATION FOR POLAR DECODING 审中-公开

    公开(公告)号：US20180323809A1

    公开(公告)日：2018-11-08

    申请号：US15967592

    申请日：2018-04-30

    Applicant: QUALCOMM Incorporated

    Inventor： Jamie Menjay Lin ,  Gabi Sarkis ,  Yang Yang

    IPC: H03M13/37 ,  H03M13/13 ,  H04L1/00

    Abstract: Methods, systems, and devices for wireless communication are described. The examples described herein may enable a decoder to determine path metrics for various decoding paths based on identified frozen bit locations of a polar code. The path metric for a decoding path may be based on bit metrics determined for the identified frozen bit locations along the decoding path. Once the path metrics and bit metrics are determined, the decoder may compare these metrics to threshold criteria and determine whether to discard decoding paths based on the comparison. The techniques described herein for discarding decoding paths may allow the decoder to discard, prune, or disqualify certain decoding paths that are unlikely to provide an accurate representation of bits received from another device. Consequently, the decoder may be able to save power by terminating a decoding process early (i.e., early termination) if all paths are discarded, pruned, or disqualified.

    TRACKING REFERENCE SIGNAL FOR NEW RADIO
    74.
    发明申请
    TRACKING REFERENCE SIGNAL FOR NEW RADIO 审中-公开

    公开(公告)号：US20180227848A1

    公开(公告)日：2018-08-09

    申请号：US15888980

    申请日：2018-02-05

    Applicant: QUALCOMM Incorporated

    Inventor： Heechoon Lee ,  Yang Yang ,  Tingfang Ji ,  Alexei Yurievitch Gorokhov

    IPC: H04W52/02 ,  H04L5/00 ,  H04W72/04

    Abstract: Tracking reference signal designs for deployments without continuous reference signal transmission are described. The tracking reference signals may be extended in the frequency domain from a synchronization signal block and may occupy a subset or all of the symbol periods of the synchronization signal block. The tracking reference signals may have the same subcarrier spacing as synchronization signals and may be punctured in the frequency domain. Alternatively, the tracking reference signals may include common control reference signals transmitted periodically with paired reference signals in a data channel. The common control reference signals and paired reference signals may be transmitted regardless of the presence of control or data. For improved tracking after a transition to a connected mode or a long discontinuous reception (DRX) cycle, a slot including tracking reference signals may be repeated or an additional tracking reference signal pattern may be transmitted.

    DOWNLINK SLOT STRUCTURE, CHANNEL PLACEMENT, AND PROCESSING TIMELINE OPTIONS
    77.
    发明申请
    DOWNLINK SLOT STRUCTURE, CHANNEL PLACEMENT, AND PROCESSING TIMELINE OPTIONS 审中-公开

    公开(公告)号：US20170353947A1

    公开(公告)日：2017-12-07

    申请号：US15613014

    申请日：2017-06-02

    Applicant: QUALCOMM Incorporated

    Inventor： Peter Pui Lok Ang ,  Tao Luo ,  Krishna Kiran Mukkavilli ,  June Namgoong ,  Yang Yang ,  Tingfang Ji

    IPC: H04W72/04 ,  H04B7/0413 ,  H04L5/00 ,  H04W72/12

    Abstract: Aspects of the disclosure provide a slot structure (e.g., the arrangement of channels and pilot signals within a slot) that can relax the processing timeline for a wireless communication device. For example, in the first or initial symbol of a slot, control information may be frequency division multiplexed (FDM) with a demodulation reference signal (DMRS) or with user data. In some cases, delayed-processing data may be sampled, and the samples may be buffered at the receiving device, for processing later, after control information needed to process the data has been received and processed. Further aspects provide for payload pre-tapering. That is, when a device delays the processing of data bits, this can cause a processing bottleneck after that buffering delay. By virtue of various pre-tapering techniques described herein, the processing load needed to process the delayed-processing data can be reduced. Other aspects, embodiments, and features are also claimed and described.

    COMMUNICATION OF BROADCAST REFERENCE SIGNAL
    78.
    发明申请
    COMMUNICATION OF BROADCAST REFERENCE SIGNAL 审中-公开

    公开(公告)号：US20170279647A1

    公开(公告)日：2017-09-28

    申请号：US15251946

    申请日：2016-08-30

    Applicant: QUALCOMM Incorporated

    Inventor： Yang Yang ,  Jing Jiang ,  Tao Luo ,  Hung Ly

    IPC: H04L27/26 ,  H04W56/00

    CPC classification number: H04L27/2613 ,  H04L5/005 ,  H04L5/0053 ,  H04L5/0094 ,  H04L27/2692 ,  H04W56/0035

    Abstract: Various aspects provide for communicating a first set of broadcast reference signals (RSs) in a first subframe that includes a synchronization (SYNC) channel and communicating a second set of broadcast RSs in a second subframe that follows the first subframe. The second subframe may immediately follow the first subframe. A portion of the SYNC channel may include information indicating a configuration of broadcast RSs in one or more other subframes. The broadcast RSs may be configured for timing-error estimation, frequency-error estimation, and/or channel estimation. Additional and alternative aspects, embodiments, and features are also provided herein.

    BACK-TO-BACK REFERENCE SIGNALS
    79.
    发明申请
    BACK-TO-BACK REFERENCE SIGNALS 审中-公开

    公开(公告)号：US20170141896A1

    公开(公告)日：2017-05-18

    申请号：US15231591

    申请日：2016-08-08

    Applicant: QUALCOMM Incorporated

    Inventor： Yang Yang ,  Tao Luo ,  Peter Pui Lok Ang ,  Jing Jiang

    IPC: H04L5/00 ,  H04W28/04

    Abstract: Methods, systems, and devices for wireless communication are described. A base station may select a two sets of reference signal resource elements (REs) for a symbol period, where each RE of the first set is contiguous to an RE of the second set. The base station may also identify resource element groups (REGs) for control signaling, where each REG covers one or more resource blocks (RBs). The base station may then perform interference cancellation, which may be based on an interference covariance matrix for each of the REGs. In some cases, the base station may coordinate with neighboring base stations (directly or through the core network) to ensure that the selected REGs do not partially overlap with reference signal transmissions or REGs of neighboring base stations.

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