Specifications

ETSI

Final draft ETSI EN 300 328 V1.8.1 (2012

04)

3 Definitions, symbols and abbreviations

3.1 Definitions

For the purposes of the present document, the terms and definitions given in the R&TTE Directive [i.1] and the

following apply:

adaptive equipment: equipment operating in an adaptive mode

adaptive frequency hopping: mechanism that allows a frequency hopping equipment to adapt to its environment by

identifying channels that are being used and excluding them from the list of available channels

adaptive mode: mechanism by which equipment can adapt to its environment by identifying other transmissions

present in the band

adjacent hopping frequency: neighbouring hopping frequency which is separated by the minimum hopping frequency

separation

antenna assembly: combination of the antenna (integral or dedicated), its feeder (e.g. coaxial cable) and if applicable,

its antenna connector and associated switching components

NOTE: The gain of an antenna assembly (G) in dBi, does not include the additional gain that may result out of

beamforming. This term (antenna assembly) refers to an antenna connected to one transmit chain.

beamforming gain: additional (antenna) gain realized by using beamforming techniques in smart antenna systems

NOTE: Beamforming gain as used in the present document, does not include the gain of the antenna assembly.

clear channel assessment: mechanism used by an equipment to identify other transmissions in the channel

combined equipment: any combination of non-radio equipment that requires a plug-in radio equipment to offer full

functionality

dedicated antenna: antenna external to the equipment, using an antenna connector with a cable and which has been

designed or developed for one or more specific types of equipment

NOTE: It is the combination of dedicated antenna and radio equipment that is expected to be compliant with the

regulations.

detect and avoid: mechanism which mitigates interference potential by avoiding use of frequencies upon detection of

other transmissions on those frequencies

direct sequence spread spectrum: form of modulation where a combination of data to be transmitted and a known

code sequence (chip sequence) is used to directly modulate a carrier, e.g. by phase shift keying

NOTE: The transmitted bandwidth is determined by the chip rate and the modulation scheme.

energy detect: mechanism used by an LBT based adaptive equipment to determine the presence of other devices

operating on the channel based on detecting the signal level of that other device

environmental profile: range of environmental conditions under which equipment within the scope of the present

document is required to comply with the provisions of the present document

frame based equipment: equipment where the transmit/receive structure is not directly demand-driven, i.e. it may be

altered by configuration changes but there is always a minimum Idle Period following a transmit period

frequency hopping spread spectrum: spread spectrum technique in which the equipment occupies a number of

frequencies in time, each for some period of time, referred to as the dwell time

NOTE: Transmitter and receiver follow the same frequency hop pattern. The frequency range is determined by

the lowest and highest hop positions and the bandwidth per hop position.

hopping frequency: any of the (centre) frequencies defined within the hopping sequence of a FHSS system