公开(公告)号：US11387870B2

公开(公告)日：2022-07-12

申请号：US17518199

申请日：2021-11-03

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Pavan Koteshwar Srinath ,  Jakob Hoydis

IPC: H04B7/0413 ,  H04L25/02

Abstract: Embodiments can include receiving transmissions over a channel at a receiver of a MIMO communication system; the transmissions are received from a plurality of transmitters in communication with the receiver. Each communication is a separate communication having a modulation and coding scheme. An estimate of the channel is converted into an estimate, for each of a plurality of transmitters, of a bit-metric decoding rate for each of a plurality of MIMO detectors. The estimated bit-metric decoding rate for each of the transmitters for each of the MIMO detectors is converted into an estimated bit error rate for each of the MIMO detectors for each of the transmitters. One of the MIMO detectors is selected for use in generating log-likelihood ratios for bits transmitted from the transmitters to the receiver. The one of the MIMO detectors is selected based on the estimated bit-error rates and a target block error rate.

公开(公告)号：US11082264B2

公开(公告)日：2021-08-03

申请号：US17044553

申请日：2018-06-29

Applicant: Nokia Technologies OY

Inventor： Faycal Ait Aoudia ,  Jakob Hoydis

IPC: H04L25/02 ,  G06N3/04 ,  H04L1/00 ,  H04L25/03

Abstract: A method, apparatus and computer program are described includes obtaining or generating a transmitter-training sequence of messages for a first transmitter of a first module of a transmission system, wherein the transmission system includes the first module having the first transmitter and a first receiver, a second module having a second transmitter and a second receiver, and a channel, wherein the first transmitter includes a transmitter algorithm having at least some trainable weights; transmitting a perturbed version of the transmitter-training sequence of messages from the first transmitter to the second receiver over the channel of the transmission system; receiving a first loss function at the first receiver from the second transmitter, wherein the first loss function is based on the transmitted perturbed versions of the transmitter-training sequence of messages as received at the second receiver and knowledge of the transmitter-training sequence of messages for the first transmitter of the transmission system; and training at least some weights of the transmitter algorithm of the first transmitter based on the first loss function.