Adaptive precoding in a MIMO wireless communication system
First Claim
1. A method for compensating hardware impairments and circuit conditions in precoding comprisingstoring Hardware Impairment Parameters (HIPs) of a User Equipment (UE) that describe imperfections and/or nonlinearities in the UE hardware in a database that a Base Station (BS) can access to, wherein the UE has a Unique Device Identity (UDID) and said UE HIPs are associated with the UDID;
- the BS acquiring the UDID of the UE;
the BS obtaining the stored HIPs of the UE from the database using the UDID; and
the BS using the obtained HIPs in the precoding to compensate hardware impairments and circuit conditions in the UE.
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Abstract
This invention presents methods for estimating MU-MIMO channel information using SU-MIMO channel information to choose a modulation and channel coding appropriate for the quality of the MU-MIMO channels, for adaptively selecting MU-MIMO precoding methods based on estimations of a plural of UEs and for compensating hardware impairments in MU-MIMO precoding.
80 Citations
7 Claims
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1. A method for compensating hardware impairments and circuit conditions in precoding comprising
storing Hardware Impairment Parameters (HIPs) of a User Equipment (UE) that describe imperfections and/or nonlinearities in the UE hardware in a database that a Base Station (BS) can access to, wherein the UE has a Unique Device Identity (UDID) and said UE HIPs are associated with the UDID; -
the BS acquiring the UDID of the UE; the BS obtaining the stored HIPs of the UE from the database using the UDID; and the BS using the obtained HIPs in the precoding to compensate hardware impairments and circuit conditions in the UE. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification