ARLA/CLUSTER: Kenwood e Icom definem sistema digital PMR conjuntamente.

[João Gonçalves Costa]

[http://tbn0.google.com/images?q=tbn:IeLnSU_iZI3sxM:http://www.mrscomms.co.uk/ICF4029_files/image001.gif]<http://images.google.pt/imgres?imgurl=http://www.mrscomms.co.uk/ICF4029_files/image001.gif&imgrefurl=http://www.mrscomms.co.uk/ICF4029.htm&h=593&w=271&sz=70&hl=pt-PT&start=7&sig2=m477dmV__oevyrT7yDmAFQ&usg=__kPKJpKSd-4N4XDEUnpNtMWZJ7Dc=&tbnid=IeLnSU_iZI3sxM:&tbnh=135&tbnw=62&ei=hDH3SO7dCoW4wQHg8uTPDg&prev=/images%3Fq%3DPMR%2BDigital%2BVoice%26gbv%3D2%26hl%3Dpt-PT%26sa%3DG>[http://tbn0.google.com/images?q=tbn:HM1BpjaifBcW3M:http://www.sepura.com/uploads/products/PartnerLogos/PMR%2520Products.jpg]<http://www.sepura.com/uploads/products/PartnerLogos/PMR%20Products.jpg>[http://tbn0.google.com/images?q=tbn:ndywjS9rEygQEM:http://www.hamradio.co.uk/acatalog/TK-3201_lrg.gif]<http://images.google.pt/imgres?imgurl=http://www.hamradio.co.uk/acatalog/TK-3201_lrg.gif&imgrefurl=http://www.hamradio.co.uk/acatalog/Walkie_Talkies.html&h=335&w=112&sz=22&hl=pt-PT&start=5&sig2=VILx7ILIQTm-DRnq0g37fA&um=1&usg=__eky1IuCvi-qBmZN-tOU4ZMSFjs0=&tbnid=ndywjS9rEygQEM:&tbnh=119&tbnw=40&ei=VjP3SKeOOI2SxAHu2ZzUDg&prev=/images%3Fq%3DTK-3101%2BProTalk%26um%3D1%26hl%3Dpt-PT%26sa%3DG>
PMR Digital Voice

The PMR industry is pressing ahead with VHF and UHF systems providing Digital Voice in 6.25 kHz channel spacing using the NXDN(tm) standard.

The digital standard being adopted by the industry for Digital Voice seems to be NXDN(tm) Digital Modulation with a number of key manufacturers already supplying products.

NXDN(tm) is understood to be a trademark of Icom Incorporated and Kenwood Corporation.

6.25 kHz NXDN(tm) uses FDMA 4-level FSK modulation using the AMBE+2 voice codec and supports both voice and data.

World Intellectual Property Organisation (WIPO) - NXDN
http://www.wipo.int/ipdl/en/madrid/key.jsp?KEY=915521

NXDN(tm) Forum Announces its Formal Establishment
http://www.icom.co.jp/world/news/pdf/080714.pdf

AAR moving forward with 6.25 kHz standard
http://falconinfo.blogspot.com/2008/09/aar-chooses-nxdn-digital-standard.html

FalconDirect
http://www.falcondirect.com/hotnews.htm

Sounds of Digital Voice Formats
http://www.w2sjw.com/radio_sounds.html

Digital Mode Samples
http://www.kb9ukd.com/digital/

Fonte:  the Southgate News website
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