Non-square quadrature amplitude modulation in wireless communication systems

    公开(公告)号:US12294479B2

    公开(公告)日:2025-05-06

    申请号:US17932976

    申请日:2022-09-16

    Abstract: A UE of a wireless communication network first receives a modulation and coding scheme index IMCS for demodulating a physical layer data channel of the network. The UE then demodulates the physical layer data channel with a non-square quadrature amplitude modulation (NS-QAM) having a modulation order and code rate corresponding to a spectral efficiency (SPEFF) substantially equal to a SPEFF of a square QAM (S-QAM) SPEFF indicted by the IMCS, where the NS-QAM has an effective channel code rate no larger than the code rate for which the UE may skip decoding a transport block in an initial received transmission.

    MIRS re-transmission optimization for groupcast utilizing network coding

    公开(公告)号:US12289167B2

    公开(公告)日:2025-04-29

    申请号:US17571321

    申请日:2022-01-07

    Abstract: Methods, systems, and devices for wireless communications are described. A base station may transmit a set of code blocks to multiple user equipments (UEs). The base station may receive feedback pertaining to reception of each of the set of code blocks at each of the multiple UEs. The base station may generate, based on the feedback, a retransmission message that includes encoded data representative of a subset of code blocks of the set of code blocks and additional redundancy with respect to the subset of code blocks. The multiple UEs may receive the retransmission message and extract a portion corresponding the set of code blocks that were previously unsuccessfully decoded. The UEs may combine the portion of the set of code blocks with the unsuccessfully decoded code blocks to create an updated combined versions of the code blocks. The UEs may decode the combined versions of the code blocks.

    Local oscillator leakage reporting

    公开(公告)号:US12191898B2

    公开(公告)日:2025-01-07

    申请号:US17664573

    申请日:2022-05-23

    Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network entity may transmit a signal generated using a mixer, wherein the signal is subject to local oscillator (LO) leakage in connection with the generation using the mixer. The network entity may transmit an LO leakage estimate indicator based at least in part on the LO leakage of the signal in connection with the generation using the mixer. Numerous other aspects are described.

    Blind common phase error and residual carrier frequency offset mitigation

    公开(公告)号:US12120050B2

    公开(公告)日:2024-10-15

    申请号:US17717682

    申请日:2022-04-11

    CPC classification number: H04L5/0048 H04L25/0238 H04L27/2601 H04W72/1263

    Abstract: Methods, systems, and devices for wireless communications are described. The described techniques support blind common phase error (CPE) and residual carrier frequency offset mitigation. Generally, the described techniques provide for blind CPE mitigation at a receiving device without a phase tracking reference signal (PTRS) associated with less overhead and improved performance as compared to use of a PTRS to mitigate CPE. A receiving device may receive a shared channel message in a scheduled shared channel allocation in accordance with a PTRS configuration that omits a PTRS allocation based on a capability of the receiving device to apply blind CPE mitigation for shared channel receptions. In some examples, with a single DMRS symbol allocation, blind CPE mitigation for each subsequent data symbol of a shared channel message may be based on the blind CPE estimation for the previous symbol, which may enable robust mitigation of a residual carrier frequency offset.

    Signal reconstruction for dynamic analog-to-digital converters

    公开(公告)号:US12113621B2

    公开(公告)日:2024-10-08

    申请号:US17124245

    申请日:2020-12-16

    CPC classification number: H04L1/1657 H04L1/1819 H04L27/2624 H04W72/0446

    Abstract: Methods, systems, and devices for wireless communication are described. A transmitting device may determine reconstruction information for a time-domain signal and may transmit the reconstruction information with the time-domain signal to a receiving device. The transmitting device may generate the reconstruction information based on estimates of how the receiving device may process the time-domain signal. For example, the transmitting device may apply a channel estimate to samples of the time-domain signal, and further perform clipping and quantization of the samples based on an estimated dynamic analog-to-digital converter (ADC) resolution of the receiving device. The transmitting device may generate the reconstruction information (e.g., using machine learning or other techniques) based on samples having the channel estimate applied and the clipped and quantized samples. The receiving device may process the received time-domain signal and use the reconstruction information to reconstruct the processed time-domain signal.

    Dynamic analog-to-digital converter capability

    公开(公告)号:US12028087B2

    公开(公告)日:2024-07-02

    申请号:US17124159

    申请日:2020-12-16

    CPC classification number: H03M1/20 H04W52/0229 H04W76/10

    Abstract: Methods, systems, and devices for wireless communication are described for one or more aspects of dynamically configuring an analog-to-digital converter (ADC). A user equipment (UE) may determine a set of supported ADC resolution sizes including one or more dynamically configurable bit quantities. The UE may transmit a capability message including an indication of the set of ADC resolution sizes to a base station. The UE may indicate, to the base station, a power consumption factor or a table of signal-to-quantization noise ratios (SQNR) per bit quantity supported by the UE's ADC. In some cases, the base station may enable, based on the set of ADC resolution sizes, clipping of a power amplifier and one or more associated precoding parameters, and may indicate the precoding parameters to the UE. The UE may select an ADC resolution size for processing received messages.

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