Jamming Detection Overview; Application Overview - Quectel WCDMA Application Note

UMTS/HSPA Module Series
WCDMA Jamming Detection Application Note
2

Jamming Detection Overview

Quectel‟s Jamming Detection allows the user to identify active jamming of the GSM/WCDMA network.
Many alarm, security and life critical operations rely on the use of GSM/WCDMA mobile communications.
Criminals and those that intent on preventing time critical messages may use GSM/WCDMA jammers to
interfere with normal network operation. Quectel‟s Jamming Detection can allow Quectel module to detect
jamming signals. When jamming is detected, Quectel module sends a notification to MCU, reporting the
presence of active jamming of the GSM mobile communication network.
Figure 1：Jamming Application Diagram

2.1. Application Overview

Quectel Jamming Detection supports to report the appearance and disappearance of jamming
automatically via URC to notify the MCU. Also you can manually query the jamming status by the QJDR
read command when AT+QJDR=1 was set before (see Chapter 3.2). The following sections describe how
to use these functionalities.
WCDMA_Jamming_Detection_Application_Note Confidential / Released 5 / 13