公开(公告)号：US10931496B2

公开(公告)日：2021-02-23

申请号：US16848744

申请日：2020-04-14

Applicant: Parallel Wireless, Inc.

Inventor： Ajay Sharma ,  Somasekhar Pemmasani

IPC: H01L27/26 ,  H04L27/26 ,  H04J11/00 ,  H04L25/02 ,  H04W72/12 ,  H04L5/00

Abstract: A method for measuring channel quality in a wireless transceiver is disclosed, comprising: receiving, at a wireless transceiver, an analog signal from a user equipment (UE); converting the analog signal to a plurality of digital samples at an analog to digital converter (ADC); performing a fast Fourier transform (FFT) on the plurality of digital samples to generate frequency domain samples; identifying an uplink demodulation reference signal (DMRS) symbol; performing channel estimation on the DMRS symbol to identify an estimate of channels; creating a noise covariance matrix from the estimate of channels; and deriving an interference measure from the noise covariance matrix.

公开(公告)号：US10763996B2

公开(公告)日：2020-09-01

申请号：US16196763

申请日：2018-11-20

Applicant: Parallel Wireless, Inc.

Inventor： Mudassar Khan ,  Ajay Sharma ,  Somasekhar Pemmasani

IPC: H04L1/18 ,  H04W80/02 ,  H04L1/00 ,  H04W80/08 ,  H04W80/04

Abstract: This disclosure introduces an advancement to the error indication message to provide detailed information about errors in configurations that are arriving from the Layer 2 to the Layer 1. A method is disclosed, comprising: performing physical layer control (PHY) of a wireless signal at a Layer 1 (L1) software module; performing medium access control (MAC) of the wireless signal at a Layer 2 (L2) software module; providing an application programming interface between the L1 software module and the L2 software module for receiving L1 configuration messages and providing error codes to the L2 software module; receiving a L1 configuration message at a Layer 1 software module; and providing an enhanced error code progressively from a L1 software module to the Layer 2 (L2) software module.

公开(公告)号：US20200099565A1

公开(公告)日：2020-03-26

申请号：US16582811

申请日：2019-09-25

Applicant: Parallel Wireless, Inc.

Inventor： Hemanth Palally ,  Saikat Senapati ,  Somasekhar Pemmasani ,  Ramesh Annavajjala

IPC: H04L27/26 ,  H04W64/00

Abstract: Systems, methods and computer software are disclosed for providing high resolution timing advance estimation based on Physical Random Access Channel (PRACH). An example method includes receiving a preamble signal r(n); performing signal conditioning on r(n); down sampling the signal and performing antialiasing filtering to provide a y(n) signal; correlating y(n) with a reference preamble with a reference preamble sequence c(n) to provide correlation output Ryc; using a peak value P of the correlation output Ryc to detect a preamble ID and a timing advance; constructing a sequence s(n) by segmenting r_centered(n) for length L around an index P*24; performing time domain interpolation of c(n) around index P to obtain a sequence c_interpolated(n); performing time domain interpolation between sequences s(n) and c_interpolated(n); detecting a peak position Q of the correlation; and deriving TA as P*24−L/2+q in terms of Ts.

公开(公告)号：US10135570B2

公开(公告)日：2018-11-20

申请号：US15479273

申请日：2017-04-04

Applicant: Parallel Wireless, Inc.

Inventor： Mudassar Khan ,  Ajay Sharma ,  Somasekhar Pemmasani

IPC: H04L1/18 ,  H04L1/00 ,  H04W80/08 ,  H04W80/02 ,  H04W80/04

Abstract: This disclosure introduces an advancement to the error indication message to provide detailed information about errors in configurations that are arriving from the Layer 2 to the Layer 1. A method is disclosed, comprising: performing physical layer control (PHY) of a wireless signal at a Layer 1 (L1) software module; performing medium access control (MAC) of the wireless signal at a Layer 2 (L2) software module; providing an application programming interface between the L1 software module and the L2 software module for receiving L1 configuration messages and providing error codes to the L2 software module; receiving a L1 configuration message at a Layer 1 software module; and providing an enhanced error code progressively from a L1 software module to the Layer 2 (L2) software module.

公开(公告)号：US20170303163A1

公开(公告)日：2017-10-19

申请号：US15489722

申请日：2017-04-17

Applicant: Parallel Wireless, Inc.

Inventor： Ajay Sharma ,  Somasekhar Pemmasani

IPC: H04W28/04 ,  H04L27/26 ,  H04L25/02

CPC classification number: H04W28/04 ,  H04L5/0007 ,  H04L25/0202 ,  H04L27/2607 ,  H04L27/2665 ,  H04L27/2678 ,  H04L27/2691

Abstract: A Long Term Evolution (LTE) receiver performing a half cyclic prefix (CP) shift on received subframes is disclosed, comprising: an analog to digital conversion (ADC) module; a cyclic prefix (CP) removal module coupled to the ADC module configured to retain a portion of cyclic prefix samples; a fast Fourier transform (FFT) module configured to receive samples from the cyclic prefix removal module, and to perform a FFT procedure on the received samples using a FFT window, the FFT window being shifted ahead based on the retained portion of cyclic prefix samples, to output an orthogonal frequency division multiplexed (OFDM) symbol; and a rotation compensation module coupled to the FFT module, the rotation compensation module configured to perform phase de-rotation of the OFDM symbol.