公开(公告)号：US20200274576A1

公开(公告)日：2020-08-27

申请号：US16874445

申请日：2020-05-14

Applicant: QUALCOMM Incorporated

Inventor： Seyong Park ,  Pinar Sen ,  Naga Bhushan ,  Tingfang Ji

IPC: H04B1/7103 ,  H04L27/00 ,  H04L1/00 ,  H04L5/00 ,  H04L27/34 ,  H04L25/06

Abstract: Methods, systems, and devices for wireless communications are described. A UE may use different modulation schemes, or different modulators, for a single data stream. The set of modulators may be based on a linear combination of a function of encoded bits to be transmitted. In some cases, the UE may use a different permutation or interleaving of the function of bits with the same linear function to generate a different set of modulators. The UE may use a combination of any one or more of the described techniques for generating a set of modulators. Different modulators may be cyclically repeated over time. The UE may apply a device-specific scrambling sequence and transmit the modulated symbols on an uplink channel. The base station may use matched filters and an element-wise estimator (ESE) to compute log-likelihood ratios (LLRs) for each bit of each UE in a received signal.

公开(公告)号：US20190110295A1

公开(公告)日：2019-04-11

申请号：US16131966

申请日：2018-09-14

Applicant: QUALCOMM Incorporated

Inventor： Seyong Park ,  Pinar Sen ,  Jay Kumar Sundararajan ,  Joseph Binamira Soriaga ,  Tingfang Ji ,  Naga Bhushan

IPC: H04W72/04 ,  H04L25/03 ,  H04L1/00 ,  H04L5/00 ,  H04L27/38 ,  H04L27/26

Abstract: The present disclosure describes the generation of long sequences from short sequences to support concurrent transmissions of large numbers of machine-type communication devices operating in a wireless communication system. These long sequences may be assigned to devices so that the devices can use the long sequences scramble their transmissions. The use of such long sequences permits many machine-type communication devices to transmit during the same time and frequency resource.

公开(公告)号：US20190097677A1

公开(公告)日：2019-03-28

申请号：US16143337

申请日：2018-09-26

Applicant: QUALCOMM Incorporated

Inventor： Pinar Sen ,  Seyong Park ,  Haitong Sun ,  Naga Bhushan ,  Tingfang Ji ,  Tugcan Aktas

IPC: H04B1/7103 ,  H04W72/04 ,  H04J13/18 ,  H04B1/7073

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may use a lower code rate by splitting a data stream into multiple data sub-streams. The UE may split the data stream to synchronously encode, modulate, and spread the data sub-streams at different layers. Then, the UE may superpose or combine the sub-streams together. The UE may scramble the combined data stream with a UE-specific scrambling code. In some examples, the UE may then apply a cyclic prefix to the combined data stream. The UE may then transmit the combined data stream to a base station. The receiving base station may use layer-wise matched filters and element-wise signal estimators (ESE) to obtain soft information such as log-likelihood ratios. Channel decoders may then determine estimated bits for each layer of each user of the combined data stream.