Optimizing reliability and power efficiency in embedded wireless systems
Last Updated: 08/03/2010
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The use of wireless technology in embedded-system applications, such as industrial monitoring and control, home automation, remote control, and medical equipment, continues to grow rapidly, and the number of new applications that are adopting wireless is growing even faster. These wireless systems are currently demonstrating a trend of adopting 2.4-GHz technologies because of worldwide unlicensed operation, faster data rates, and other inherent benefits over less-than-1-GHz technologies. The drawback is that these systems will all be competing with each other for airspace, as well as with other prevalent 2.4-GHz systems, such as Wi-Fi, cordless phones, and Bluetooth. It is inevitable that all of these 2.4-GHz wireless systems will eventually interfere with each other and increase the chance of communication failures. Thus, it is no longer sufficient for RF engineers to build a radio and protocol stack that can just wirelessly transmit and receive data without any defense mechanisms for interference. Designers must implement intelligent techniques so that embedded wireless systems are in fact reliable in the increasingly congested 2.4-GHz spectrum. To read more, visit EDN.
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