公开(公告)号：US10014904B1

公开(公告)日：2018-07-03

申请号：US15700342

申请日：2017-09-11

Applicant: Saankhya Labs Pvt. Ltd.

Inventor： Sudeep Mirpadi Anand ,  Shrinivas Subramania Bhat ,  Anindya Saha

IPC: H04B17/00 ,  H04B1/525 ,  H04L5/14 ,  H04L1/00 ,  H04L5/00 ,  H04B1/10

CPC classification number: H04B1/525 ,  H04B1/1027 ,  H04B1/1036 ,  H04B2001/1045 ,  H04B2001/1063 ,  H04L1/0006 ,  H04L1/0009 ,  H04L1/0054 ,  H04L1/0071 ,  H04L5/0007 ,  H04L5/143 ,  H04L5/1461

Abstract: Disclosed is a system for mitigating co-channel interference (CCI) caused due to narrow multiband signal in white space (WS) modems. The system includes a base-station that includes a base-station transmitter and a base-station receiver. The base-station receiver receives an orthogonal frequency division multiplexing signal (OFDM) from one or more customer premises equipment (CPE) transmitters. An interference detection module detects a presence of co-channel interference in carriers of the OFDM signal and determines co-channel interference affected carriers. A dynamic notch filter module receives the central interference carriers from interference detection module and mitigates the co-channel interference of co-channel interference affected carriers without affecting frame detection capability of the system. The base-station transmitter includes an interference aware frequency interleaver that spreads co-channel interference affected carriers based on interference specific interleaving parameters and frequency de-interleaving is performed corresponding to frequency interleaving in the base-station receiver.

公开(公告)号：US09949277B1

公开(公告)日：2018-04-17

申请号：US15700357

申请日：2017-09-11

Applicant: Saankhya Labs Pvt. Ltd.

Inventor： Sudeep Mirpadi Anand ,  Shrinivas Subramania Bhat ,  Anindya Saha

IPC: H04B1/00 ,  H04W72/08 ,  H04J11/00 ,  H04W16/14

CPC classification number: H04W72/082 ,  H04J11/0023 ,  H04W16/14

Abstract: Disclosed is a system for mitigating co-channel interference (CCI) in white space (WS) modems. The system includes a base-station that includes a base-station transmitter and a base-station receiver. The base-station receiver receives an OFDM signal from one or more CPE transmitters. An interference detection module detects presence of co-channel interference in carriers of the OFDM signal and determines co-channel interference affected carriers. A dynamic notch filter module (i) receives central interference carriers from interference detection module and (ii) mitigates the co-channel interference of co-channel interference affected carriers without affecting frame detection capability of the system. An interference aware signal to noise ratio (SNR) estimation module determines an average signal to noise ratio (SNR) of (i) interference unaffected carriers and (ii) co-channel interference affected carriers. An interference aware de-mapper module processes average signal to noise ratio of (i) interference unaffected carriers and (ii) co-channel interference affected carriers.