Methods and apparatuses for signaling with geometric constellations

    公开(公告)号:US11902078B2

    公开(公告)日:2024-02-13

    申请号:US17328993

    申请日:2021-05-24

    CPC classification number: H04L27/3405 H04B14/023 H04L1/0003 H04L1/0009

    Abstract: Communication systems are described that use signal constellations, which have unequally spaced (i.e. ‘geometrically’ shaped) points. In many embodiments, the communication systems use specific geometric constellations that are capacity optimized at a specific SNR. In addition, ranges within which the constellation points of a capacity optimized constellation can be perturbed and are still likely to achieve a given percentage of the optimal capacity increase compared to a constellation that maximizes dmin, are also described. Capacity measures that are used in the selection of the location of constellation points include, but are not limited to, parallel decode (PD) capacity and joint capacity.

    NON-LINEARITY ESTIMATION TECHNIQUES FOR DIGITAL POST DISTORTION (DPOD) IN A WIRELESS SYSTEM

    公开(公告)号:US20240039775A1

    公开(公告)日:2024-02-01

    申请号:US17877722

    申请日:2022-07-29

    CPC classification number: H04L27/2614 H04L5/0051 H04L1/0003

    Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for non-linearity estimation techniques for digital post distortion (DPoD) in a wireless system. In some aspects, a first wireless device may estimate a power amplifier (PA) non-linearity associated with a second wireless device using select signaling from the second wireless device. For example, the first wireless device may use a received signal to estimate the PA non-linearity if a dynamic power range associated with the signal triggers the estimation of the PA non-linearity (such as if the dynamic power range associated with the signal satisfies, or is expected to satisfy, a threshold dynamic power range). If the dynamic power range of the signal triggers the estimation of the PA non-linearity, the first wireless device may introduce DPoD to signaling received from the second wireless device in accordance with the estimation of the PA non-linearity.

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