TELECOMMUNICATIONS SYSTEMS
COMMUNICATION WIRELESS COMPUTING DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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orthogonal frequency division multiplexing
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time division multiplexing
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frequency hopping spread spectrum
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channel division multiplexing
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Detailed explanation-1: -Bluetooth operates in the same 2.4-to 2.483-GHz unlicensed spectrum as Wi-Fi. It uses a technique known as frequency-hopping spread spectrum (FHSS), where the data is divided into chunks and transmitted via a carrier that hops from one random frequency to another. Data is transmitted at a 1-Mbps rate using FSK.
Detailed explanation-2: -Instead of transmitting over one frequency within the 2.4 GHz band, Bluetooth radios use a fast frequency-hopping spread spectrum (FHSS) technique, allowing only synchronized receivers to access the transmitted data.
Detailed explanation-3: -Bluetooth® technology uses the 2.4 GHz ISM spectrum band (2400 to 2483.5 MHz), which enables a good balance between range and throughput. In addition, the 2.4 GHz band is available worldwide, making it a true standard for low-power wireless connectivity.
Detailed explanation-4: -Frequency hopping spread spectrum techniques have been successfully implemented in many space systems and avionics systems for multiple access communications, protection against jamming and interference and various C3 (Communication, Command and Control) applications.