公开(公告)号：US20210135915A1

公开(公告)日：2021-05-06

申请号：US17041490

申请日：2018-06-07

Applicant: INTEL IP CORPORATION

Inventor： Placido MURSIA ,  Stefan FECHTEL

IPC: H04L27/26 ,  H04L25/02 ,  H04L5/00 ,  H04L12/26

Abstract: A method of generating channel estimates of a communication channel in an OFDM system includes receiving reference symbols from at least one time-frequency observation block of a predetermined block size infrequency and time. Subspace-transformed reference symbols are generated from the received reference symbols. The subspace-transformed reference symbols are subspace filtered to generate a channel estimate for a communication channel target time. A latency between a communication channel time instant of a currently received reference symbol and the communication channel target time is smaller than the observation block size in time.

公开(公告)号：US20200052931A1

公开(公告)日：2020-02-13

申请号：US16485799

申请日：2018-02-05

Applicant: Intel IP Corporation

Inventor： Stefan FECHTEL

IPC: H04L25/02 ,  H04L5/00 ,  H04L25/03

Abstract: A channel estimation circuit (100) includes an input interface (110). The input interface (110) is configured to receive a plurality of pilot symbols from a communication channel. Furthermore, the channel estimation circuit (100) includes processing circuitry (120). The processing circuitry (120) is configured to generate a channel autocorrelation matrix and at least one channel cross-correlation vector. The generating of the channel autocorrelation matrix and the channel cross-correlation vector can be based on predetermined statistical information on the communication channel. Additionally, the processing circuitry (120) is configured to generate a subspace mapping for a subspace transformation based on the channel autocorrelation matrix. Additionally, the processing circuitry (120) is configured to generate a subspace transformed channel autocorrelation matrix, at least one subspace trans-formed channel cross-correlation vector, and a plurality of subspace transformed pilot sym¬bols, by applying the subspace mapping to the channel autocorrelation matrix, the channel cross-correlation vector, and to the plurality of pilot symbols. Additionally, the processing circuitry (120) is configured to generate a plurality of subspace channel estimation filter coefficients based on the subspace transformed channel autocorrelation matrix and the sub-space transformed channel cross-correlation vector. Additionally, the processing circuitry (120) is configured to generate an estimate of at least one channel coefficient of the com¬munication channel based on the subspace transformed pilot symbols and the subspace channel estimation filter coefficients. Furthermore, the channel estimation circuit (100) in¬cludes an output interface (150) configured to provide the estimate of the at least one chan-nel coefficient.

公开(公告)号：US20180175959A1

公开(公告)日：2018-06-21

申请号：US15738599

申请日：2016-05-24

Applicant: Intel IP Corporation

Inventor： Manoj RAVICHANDRAN ,  Andrey CHERVYAKOV ,  Franz EDER ,  Stefan FECHTEL ,  Sabine ROESSEL

IPC: H04J11/00 ,  H04W48/16

CPC classification number: H04J11/005 ,  H04J11/0079 ,  H04W48/16

Abstract: A method for detecting a transmission from an interfering radio cell includes: receiving a signal comprising transmissions from a serving radio cell and from a plurality of interfering radio cells, wherein a reference symbol of a transmission from at least one interfering radio cell of the plurality of interfering radio cells is colliding with a reference symbol of a transmission from the serving radio cell; generating a set of transmission signal hypotheses, each of which is dependent on at least one interferer parameter of the at least one interfering radio cell; obtaining at least one interferer radio cell identifier; and detecting a transmission from at least one interfering radio cell of the plurality of interfering radio cells in the received signal based on the at least one interferer radio cell identifier and the set of transmission signal hypotheses.