Invention Grant
- Patent Title: Systems and methods for wireless signal classification
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Application No.: US16238337Application Date: 2019-01-02
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Publication No.: US10972202B2Publication Date: 2021-04-06
- Inventor: Wei Zha , Gang Wang
- Applicant: PC-TEL, Inc.
- Applicant Address: US IL Bloomingdale
- Assignee: PC-TEL, Inc.
- Current Assignee: PC-TEL, Inc.
- Current Assignee Address: US IL Bloomingdale
- Agency: Husch Blackwell LLP
- Main IPC: H04L27/22
- IPC: H04L27/22 ; H04B17/336 ; H04J3/06 ; H04L27/26 ; H04L27/36

Abstract:
Systems and methods for classifying a P25 Phase 1 downlink transmission as using either C4FM modulation or CQPSK modulation are provided. Some methods can include calculating a first signal-to-noise ratio (SNR) at or near a middle of a first symbol of a received wireless signal, calculating a second SNR at or near an edge of the first symbol, calculating a difference between the second SNR and the first SNR, determining whether the difference is greater than a threshold, and classifying a modulation technique of the received wireless signal as either C4FM modulation or CQPSK modulation based on whether the difference is greater than the threshold.
Public/Granted literature
- US20200213020A1 SYSTEMS AND METHODS FOR WIRELESS SIGNAL CLASSIFICATION Public/Granted day:2020-07-02
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