Design and Developers Forum: Application and
Design of In-Building RF Distribution Systems
Part 1
by Leo Holzenthal Jr., PE, M S Benbow & Associates
Ahmed Hminy, Andrew Wireless Solutions
Ali Nemati, Dallas-Fort Worth International Airport
Copyright 2008
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1. Agenda – Part 1
1. Wireless Communications Spectrum 101
1.
2.
3.
4.
Introduction
Paging Spectrum
TwoTwo-Way Radio Spectrum
Commercial (Franchise) Wireless Telephone
Carrier Spectrum
• New Spectrum opening for twotwo-way
operation
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1.
Agenda
2. What is DAS?
1. A system designed to put signal inside of structures
where it cannot penetrate from outside sources, or
where outdoor sources do not exist
2. Distributed antenna system
3. In building wireless system
4. BDA system
5. many other trade names
3. Why?
1. Better Quality of service
2. Continunity of Service
3. Public Safety
Safety-- Reduced human exposure to RF
radiation
4. Increased commercial revenue
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There is much spectrum available for use in
the US that provides connectivity to the public
and commercial market. Differences in the
bandplans for each spectum allocation create
difficulties in the design of RF distribution
systems. Some of these differences are:
•Channel Bandwidth
•Channel Guard Band width
•Frequency propagation
• Transmit / Receive frequency spacing
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Wireless Paging
Paging Radio Frequency Spectrum of Interest:
•
•
•
•
•
35 Mhz
43 Mhz
152-159 Mhz (two-way)
454 Mhz (two-way)
935 Mhz
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Two - Way Radio
Two-Way Radio Frequency Spectrum of Interest:
•
•
•
•
•
•
•
34-39 MHz
150 MHz Band
220 MHz Band
430-512 MHz Band
700 MHz Band (under construction)
806-869 MHz Band
896-935 MHz Band
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Franchised Wireless Telephone Services
Common Carrier Wireless Telephone Services
•Protected by the Wireless Communications Act of 1996
•Cellular Wireless
•Personal Communications Services - Broadband and
Narrowband
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Example: Franchised Wireless Telephone Services
Mobile Common Carrier License Operators in New Orleans Area
PCS Broadband (CW)
A
B
C
D
E
F
Cellular (CL)
A
Licensee
Sprint PCS
Verizon Wireless
T-Mobile
AT&T Wireless
AT&T Wireless
AT&T Wireless
Licensee
AllTel
Spectrum Pairs (MHZ)
1850-1865
1930-1945
1870-1885
1950-1965
1895-1910
1975-1990
1865-1870
1945-1950
1885-1890
1965-1970
1890-1895
1970-1975
Spectrum Pairs (MHZ)
824.04-834.99 869.04-879-99
845.01-846.48 890.01-891.48
B
Cingular Wireless
835.02-844.98 880.02-889.98
846.51-848.97 891.51-893.97
Specialized Mobile Radio
Licensee
Spectrum Pairs (MHZ)
N/A
Nextel Communications
806-821
855-866
Bandwidth
15
15
15
5
5
5
Bandwidth
11
1.5
10
1.5
Bandwidth
25kHz each
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Go to Part Two – thanks!
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