公开(公告)号：US10477587B2

公开(公告)日：2019-11-12

申请号：US15063543

申请日：2016-03-08

Applicant: FREESCALE SEMICONDUCTOR, INC.

Inventor： Matanya Handler ,  Igor Levakov

IPC: H04L1/00 ,  H04W74/08 ,  H04B17/336

Abstract: A method including receiving, by an antenna combiner of a wireless communication system, a set of Random Access Channel (RACH) sequences of a first RACH signal from a first antenna and a set of RACH sequences of a second RACH signal from a second antenna. The method further including selecting, by the antenna combiner, each RACH sequence of the set of RACH sequences of a selected RACH signal from a selected antenna that has a best Signal to Interference plus Noise Ratio (SINR) from each RACH sequence of the set of RACH sequences of the first RACH signal from the first antenna that has a first SINR and each RACH sequence of the set of RACH sequences of the second RACH signal from the second antenna that has a second SINR.

公开(公告)号：US09749161B1

公开(公告)日：2017-08-29

申请号：US15051120

申请日：2016-02-23

Applicant: Freescale Semiconductor, Inc.

Inventor： Avraham D. Gal ,  Roi M. Shor ,  Igor Levakov

IPC: H04B1/62 ,  H04L25/03 ,  H04B1/04

CPC classification number: H04L25/03885 ,  H04B1/0475 ,  H04B2001/0425 ,  H04L25/03057 ,  H04L2025/03681

Abstract: A predistortion method and apparatus are provided which use a DPD actuator (225) to apply a memory polynomial formed with first DPD coefficients to a first input signal x[n], thereby generating a first pre-distorted input signal y[n] which is provided to the non-linear electronic device (253) to produce the output signal, where the memory polynomial may be adaptively modified with a digital predistortion adapter (224) which computes second DPD coefficients u[n] with an iterative fixed-point conjugate gradient method which uses N received digital samples of the first pre-distorted input signal y[n] and a feedback signal z[n] captured from the output signal to process a set of conjugate gradient parameters (u, b, v, r, ω, α, β) at each predetermined interval, thereby updating the first DPD coefficients with the second DPD coefficients u[n] generate a second pre-distorted input signal which is provided to the non-linear electronic device.

公开(公告)号：US20170265228A1

公开(公告)日：2017-09-14

申请号：US15063543

申请日：2016-03-08

Applicant: FREESCALE SEMICONDUCTOR, INC.

Inventor： Matanya Handler ,  Igor Levakov

IPC: H04W74/08 ,  H04B17/336

Abstract: A method including receiving, by an antenna combiner of a wireless communication system, a set of Random Access Channel (RACH) sequences of a first RACH signal from a first antenna and a set of RACH sequences of a second RACH signal from a second antenna. The method further including selecting, by the antenna combiner, each RACH sequence of the set of RACH sequences of a selected RACH signal from a selected antenna that has a best Signal to Interference plus Noise Ratio (SINR) from each RACH sequence of the set of RACH sequences of the first RACH signal from the first antenna that has a first SINR and each RACH sequence of the set of RACH sequences of the second RACH signal from the second antenna that has a second SINR.

公开(公告)号：US20170244582A1

公开(公告)日：2017-08-24

申请号：US15051120

申请日：2016-02-23

Applicant: Freescale Semiconductor, Inc.

Inventor： Avraham D. Gal ,  Roi M. Shor ,  Igor Levakov

IPC: H04L25/03 ,  H04B1/04

CPC classification number: H04L25/03885 ,  H04B1/0475 ,  H04B2001/0425 ,  H04L25/03057 ,  H04L2025/03681

Abstract: A predistortion method and apparatus are provided which use a DPD actuator (225) to apply a memory polynomial formed with first DPD coefficients to a first input signal x[n], thereby generating a first pre-distorted input signal y[n] which is provided to the non-linear electronic device (253) to produce the output signal, where the memory polynomial may be adaptively modified with a digital predistortion adapter (224) which computes second DPD coefficients u[n] with an iterative fixed-point conjugate gradient method which uses N received digital samples of the first pre-distorted input signal y[n] and a feedback signal z[n] captured from the output signal to process a set of conjugate gradient parameters (u, b, v, r, ω, α, β) at each predetermined interval, thereby updating the first DPD coefficients with the second DPD coefficients u[n] generate a second pre-distorted input signal which is provided to the non-linear electronic device.

公开(公告)号：US09667455B1

公开(公告)日：2017-05-30

申请号：US15078021

申请日：2016-03-23

Applicant: FREESCALE SEMICONDUCTOR, INC.

Inventor： Igor Levakov ,  Haim Bareket ,  Roi M. Shor

IPC: H03H7/30 ,  H03H7/40 ,  H03K5/159 ,  H04L25/03 ,  H04B7/0413

CPC classification number: H04L25/03159 ,  H04B7/0413 ,  H04L25/03891 ,  H04L2025/03426 ,  H04L2025/03439 ,  H04L2025/03522

Abstract: An equalizer circuit of a particular equalization stage of a equalizer circuit is omitted, and input signals that would have otherwise been received at the omitted equalization circuit bypass the equalization stage and are instead processed at an equalizer circuit included at the next stage. Thus, a subset of the received frequency-domain signals can be processed by equalizer circuits at a first stage, while the remaining received frequency-domain signals bypass the first stage and are processed at an equalizer circuit included at a second stage.