Frequency-Hopping Spread-Spectrum (FHSS) is radio mechanism that transmit data to a receiver over numerous "hop frequencies" (79 total) in a random pattern.

Frequency hopping, spread spectrum. Frequency hopping is one of two basic modulation techniques used in spread spectrum signal transmission. It is the repeated switching of frequencies during radio transmission, often to minimize the effectiveness of "electronic warfare" - that is, the unauthorized interception or jamming of telecommunications. It also is known as frequency- hopping code division multiple access.

Frequency hopping spread spectrum. FHSS is a transmission technology that uses a narrowband carrier signal that changes frequency (hops) in a random but predictable pattern as a function of time over a band of frequencies that is known by both the transmitter and receiver. http://murray.newcastle.edu.au/users/staff/eemf/ ELEC351/SProjects/Morris/project.htm http://sssmag.com/ss.html http://cas.et.tudelft.nl/~glas/ssc/techn/techniques.html http://www.metricsystems.com/technology.html

Frequency Hopping Spread Spectrum. A type of spread spectrum radio technology where the sender and receiver "hop" together from one frequency to another to avoid detection or jamming.

Frequency Hopping Spread Spectrum. FHSS is a spread spectrum technique in which the frequency of an already modulated signal is modulated again. FHSS is used in Bluetooth with GFSK (Gaussian Frequency Shift Keying) as its modulation technique. Bluetooth signal hops from one frequency channel to another within the specified spectrum 1600 times per second to avoid interference from other wireless systems. Therefore, each Bluetooth time slot is 1/1600 second or 625 μs long. Compare with DSSS. Also see spread spectrum and Bluetooth.

Frequency Hopping Spread Spectrum:. A type of radio communications in which the transmitter and receiver hop in synchronization through a pre-arranged pattern of frequencies. This reduces the effect of narrow band noise. FHSS modulates information onto a narrowband carrier signal that "hops" in a pseudo-random but predictable sequence from frequency to frequency. This technique reduces interference because a signal from a narrowband system will only affect part of the spectrum. Transmission frequencies are determined by a so-called spreading, or hopping, code. Receivers must be set to the same hopping code and must listen to the incoming signal at the right time and correct frequency in order to properly decode the signal. FCC regulations require manufacturers to use 75 or more frequencies per transmission channel with a maximum dwell time (the time spent at a particular frequency) of 400 ms.

Short for Frequency-Hopping Spread Spectrum. FHSS is where the data signal is modulated with a narrow carrier signal that "hops" in a random but predictable sequence from frequency to frequency. FHSS is less widely used but can have some advantages in areas of high interference or reflections.

Frequency Hopping Spread Spectrum. A type of spread-spectrum radio transmission in which the transmitter and receiver hop in synchronization from one frequency to another according to a prearranged pattern.

Frequency Hoping Spread Spectrum. A modulation scheme where both transmitter and receiver dwell on a one channel for a period of time and then hop from that channel to another one. The time spent on each channel is called a chip. The pattern of channel usage is usually based upon a pseudorandom binary sequence. The ratio between the chipping (or hopping) rate and the user data rate differentiates the two types of FHSS schemes. Systems where the chipping rate is higher than the user data rate are known as fast frequency hopper systems, while systems where the chipping rate is lower than the user data rate are known as slow frequency hopper systems.

(Frequency Hopping Spread Spectrum) A technology employed by Wi-Fi devices whereby the wireless signal changes frequency to avoid interference and to offer greater security.

Frequency Hopping Spread Spectrum, transmitting on one frequency for a certain time, then randomly jumping to another, and transmitting again.

See Frequency Hopping Spread Spectrum.

Wireless LAN products are available in three different technologies: direct-sequencing spread-spectrum (DSSS), frequency-hopping spread-spectrum (FHSS), and infrared. DSSS and FHSS are spread-spectrum techniques that operate over the radio airwaves in the unlicensed ISM band (industrial, scientific, and medical). FHSS uses a technique by which the signal transmitted hops among several frequencies at a specific rate and sequence as a way of avoiding interference.

FHSS is one of two types of spread spectrum radio, the other being direct-sequence spread spectrum. FHSS is a transmission technology used in LAWN transmissions where the data signal is modulated with a narrowband carrier signal that "hops" in a random but predictable sequence from frequency to frequency as a function of time over a wide band of frequencies. The signal energy is spread in time domain rather than chopping each bit into small pieces in the frequency domain. This technique reduces interference because a signal from a narrowband system will only affect the spread spectrum signal if both are transmitting at the same frequency at the same time. If synchronized properly, a single logical channel is maintained.

Frequency Hopping Spread Spectrum - A method of data transmission in which the radio signal "hops" between frequencies within a narrow band from 2.40GHz to 2.483GHz as it sends data packets.

Edit / Frequency Hopping Spread Spectrum - A commonly used method of spread spectrum radio data transmission which transmits small chunks or packets of data over a wide number of different frequencies. It hops from frequency to frequency in a predicable but non-sequential pattern. It transmits one packet of data on each hop. FHSS is one of two types of spread spectrum radio transmission techniques. The other is DSSS or Direct Sequence Spread Spectrum See Also: DSSS 802.11a HomeRF

Frequency Hopping Spread Spectrum - Wireless Radio Mode

(Frequency Hopping Spread Spectrum) IEEE 802.11 Wireless LAN Standards Committee approval for Lannair Ltd.’s concept for at least 2 Mbps transmission rate with dynamic data rate switching.

Frequency Hopping Spread Spectrum. A technique used in radio transmission systems, such as wireless local area networks (WLAN) and select mobile networks. FHSS converts a data stream into a stream of packets which are then sent in short bursts via transmitters and receivers that move or “hop” from one frequency to another.

Frequency Hopping Spread Spectrum, the other technology used in 2.4-GHz radio frequency wireless LANs.

Frequency-Hopping Spread Spectrum changes, or hops, frequencies in a pattern known to both sender and receiver. Contrast to DSSS. FHSS is little influenced by radio stations, reflections, or other environmental factors, but it is much slower than DSSS. Bluetooth uses this technology.

Frequency Hopping Spread Spectrum. A technique used in radio transmission systems, such as in WLANs and in some PCS systems. FHSS involves the conversion of a data stream into a stream of packets in which short bursts of packets are transmitted over a range of 75 or more frequencies. The data is sent via transmitters and receivers that move from one frequency to another in a “hop” sequence. See also 802.11, WLAN and PCS.

(Wireless) Frequency Hopping Spread Spectrum. A method for generating spread spectrum transmissions where the signal is switched between different frequency channels in a pseudorandom sequence known by both the transmitter and the receiver pair. FHSS is useful for sending small, redundant packets of data in a high interference environment.