TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

A multibeam, spherical-reflector satellite antenna for the 20-and 30-GHz bands. A multibeam antenna for satellite communication affords reuse of frequency allocations and flexibility in traffic routing. A multibeam satellite antenna is described that employs a spheroidal reflector in a compact periscope design. The aperture is 1. 5 meters in diameter radiating six beams in the 20-and 30-GHz satellite frequency bands. Electrical measurements indicate that this antenna is suitable for multibeam satellite use.  2, record 1, English, - spherical%20reflector%20satellite

Record 1,  Textual support,  French

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

The ability to reuse channels on the same frequency which is possible due to the attenuation of the signals by distance.  4, record 2, English, - frequency%20reuse

Record number: 2, Textual support number: 1 CONT

Frequency reuse allows the discrete channels assigned to a specific cell(for example cell 1) to be used again in any cell which is separated from cell 1 by enough distance to prevent cochannel interference from deteriorating the quality of the service.  5, record 2, English, - frequency%20reuse

Record number: 2, Textual support number: 1 OBS

The frequency reuse concept is not only used in cellular radio telephone service but also in the television and radio industries.  5, record 2, English, - frequency%20reuse

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Emploi d'une même bande de fréquences pour transmettre simultanément des informations indépendantes, dans une station radioélectrique ou dans un système de radiocommunication, en vue d'améliorer l'utilisation du spectre radioélectrique.  3, record 2, French, - r%C3%A9utilisation%20des%20fr%C3%A9quences

Record number: 2, Textual support number: 1 CONT

La réutilisation de fréquences entre émetteurs distants qui permet de maximiser l'utilisation des fréquences tout en limitant les interférences. La zone de service est donc divisée en cellules adjacentes, chacune caractérisée par un émetteur- récepteur et un certain nombre de fréquences qui seront réutilisées dans des cellules distantes.  4, record 2, French, - r%C3%A9utilisation%20des%20fr%C3%A9quences

Record number: 2, Textual support number: 1 OBS

Dans les réseaux cellulaires de radiocommunication avec les mobiles, les mêmes bandes de fréquences sont employées dans des cellules suffisamment éloignées. Dans les radiocommunications spatiales, on emploie, par exemple, des polarisations orthogonales, la séparation angulaire de faisceaux étroits, ou l'espacement de plusieurs satellites au voisinage d'une même position orbitale.  3, record 2, French, - r%C3%A9utilisation%20des%20fr%C3%A9quences

Record 2,  Textual support,  Spanish

Record number: 2, Textual support number: 1 DEF

Capacidad de reutilizar canales en la misma frecuencia, lo cual es posible gracias a la atenuación de las señales por la distancia.  1, record 2, Spanish, - reutilizaci%C3%B3n%20de%20frecuencia

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

The signal is filtered after the correlator so that the interfering signals are reduced by the ratio of the bandwidth before and after the correlator. This signal improvement is called the processing gain and is a major factor in determining the CDMA [code division multiple access] digital cellular system capacity. Other important parameters are the... efficiency of frequency reuse, number of cell sectors, and voice duty cycle.  2, record 3, English, - voice%20duty%20cycle

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

The creation of narrow satellite beams permits not only the effective use of satellite power, but also allows the reuse of the frequency band and provides a means of overcoming the self-interference limit in CDMA.... Today's mobile satellites have onboard processors which connect an uplink band to a downlink beam. Processors use A/D conversion and digital filtering. The A/D converters quantize the signal and produce quantisation noise. The combined signal to quantization noise ratio is(N/C) q=(L2-1)/p2pa.  2, record 4, English, - signal%2Dto%2Dquantization%20noise

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

An antenna capable of producing multiple beams in order to provide either space diversity, polarization diversity or variable-shaped beams.  2, record 5, English, - multibeam%20antenna

Record number: 5, Textual support number: 1 OBS

In satellite communications, space diversity allows for users geographically separated to reuse the same frequency band by accessing the satellite through a different antenna beam; polarization diversity allows the same frequency band to be reused by employing orthogonal polarizations. In a variable-shaped multibeam antenna, the beams are interconnected to a single common part. A receive-only earth station antenna may also be a multibeam antenna in order to accommodate satellites in the orbital arc.  2, record 5, English, - multibeam%20antenna

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 DEF

Antenne à plusieurs accès indépendants, ayant simultanément plusieurs diagrammes de rayonnement différents, chaque diagramme correspondant à un accès.  4, record 5, French, - antenne%20multidiagramme

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 CONT

cellular mobile radio differs from previous mobile radio designs in two critical areas :frequency reuse and cell splitting.  1, record 6, English, - cellular%20mobile%20radio

Record 6,  Textual support,  French

Record 6,  Textual support,  Spanish