Frequency Hopping

Some articles on frequency, frequency hopping:

DMX512 - DMX in Practice - Wireless Operation
... The first commercially marketed wireless DMX512 system was based on frequency-hopping spread spectrum (FHSS) technology using commercial wireless modems ... Other later-generation systems still used frequency-hopping spread spectrum (FHSS) technology, but at higher bandwidth ... This has been solved in newer wireless DMX systems by using adaptive frequency hopping and cognitive coexistence, a technique to detect and avoid surrounding wireless systems, to avoid ...
Electronic Counter-countermeasures - Specific ECCM Techniques - Frequency Hopping
... Frequency agility ('frequency hopping') may be used to rapidly switch the frequency of the transmitted energy, and receiving only that frequency during the receiving time window ... This foils jammers which cannot detect this frequency switch quickly enough nor predict the next hop frequency, and switch their own jamming frequency accordingly during the receiving time window ... the jammer to spread its jamming power across multiple frequencies in the jammed system's frequency range, reducing its power in the actual frequency used by the equipment at any one time ...
List of Channel Access Methods - Circuit Mode and Channelization Methods
... The following are common circuit mode and channelization channel access methods Frequency division multiple access (FDMA), based on frequency-division multiplex (FDM) Wavelength ... linearly-precoded OFDMA (LP-OFDMA), based on single-carrier frequency-domain-equalization (SC-FDE) ... Time-division multiple access (TDMA), based on time-division multiplex (TDM) Multi-Frequency Time Division Multiple Access (MF-TDMA) Code division multiple access (CDMA), a.k.a ...
Bluetooth Low Energy - Technical Details
... Bluetooth low energy technology uses a different frequency hopping scheme to Classic Bluetooth technology as a result, while both FCC and ETSI classify Bluetooth ... user defined Robustness Adaptive fast frequency hopping, FEC, fast ACK Adaptive frequency hopping, Lazy Acknowledgement, 24-bit CRC, 32-bit Message Integrity Check ...
HAVE QUICK
... HAVE QUICK is a frequency-hopping system used to protect military UHF radio traffic ... in the 1970s reached a point where anyone with an inexpensive radio frequency scanner or receiver set could intercept military communications ... Once the target frequencies were identified, radio frequency jamming could easily be employed to degrade or completely disable communications ...

Famous quotes containing the word frequency:

    The frequency of personal questions grows in direct proportion to your increasing girth. . . . No one would ask a man such a personally invasive question as “Is your wife having natural childbirth or is she planning to be knocked out?” But someone might ask that of you. No matter how much you wish for privacy, your pregnancy is a public event to which everyone feels invited.
    Jean Marzollo (20th century)