Network Coverage Category
Network topologies and spectrum efficiency of High and Low Tower Broadcast Networks
Posted on June 3, 2014 Leave a Comment
I have made a study, comissioned by Broadcast Networks Europe (BNE), on network topologies and spectrum efficiency of High and Low Tower Broadcast Networks. The study is based on results from computer simulations made in a software that I created specifically for this work. Below follows excerpts from the Executive Summary and Background sections in the final report of […]
The Importance of a Site Survey
Posted on April 13, 2014 Leave a Comment
In radio network planning projects it is more of a rule than an exception that the given site coordinates are inaccurate compared to the resolution of the underlying terrain database. If inaccurate input data is entered into the radio network planning software, the resulting output will also be inaccurate. Garbage in, garbage out! The purpose […]
How do you reach the full potential of your SFNs?
Posted on March 8, 2014 Leave a Comment
In large SFNs, where the transmitter separation distances exceed the selected guard interval length, self–interference zones might occur within the required service area. These zones might have a very strong negative impact on the network coverage probability. The network planner can apply several different approaches to mitigate the negative effect of the self–interference zones. The […]
Four (4) Important News in Rec. ITU-R P.1546-5
Posted on December 15, 2013 Leave a Comment
Rec. ITU‑R P.1546 is a notorious radiowave propagation model, used for point-to-area predictions for frequency and network planning of terrestrial services in the frequency range 30 MHz to 3 000 MHz. The latest version of this recommendation can be found here: http://www.itu.int/dms_pubrec/itu-r/rec/p/R-REC-P.1546-5-201309-I!!PDF-E.pdf The first version of Rec. ITU‑R P.1546 was approved already in October 2001. The recommendation has then been updated continuously and […]
Why the Choice of T2-Frame Length is Essential for DVB-T2
Posted on November 11, 2013 Leave a Comment
You want to use optimal DVB-T2 system parameters. Here’s why the choice of T2-Frame length is important. Before diving into the details of T2-Frame length, let’s directly give the answer to the why in the headline – the choice of frame length is important if one want to optimize the bit rate and the interleaving […]
DVB-T2 FECFRAME – What is it?
Posted on October 28, 2013 Leave a Comment
FECFRAME is a fundamental DVB-T2 system parameter. There are two FECFRAME values: long (64 800 bits) and short (16 200 bits). FEC (Forward Error Correction) is a technique that is used for correcting errors in data transmission over noisy communication channels. The transmitter accomplishes FEC by adding redundant check bits to the input data stream […]
An Introduction to the Whats, Whys, and Hows of DVB-T2 Scattered Pilot Patterns
Posted on October 13, 2013 Leave a Comment
Today’s most popular digital wireless systems – for example WLAN, digital terrestrial broadcast systems, 4G cellular networks, etc. – are all based on Orthogonal Frequency Division Multiplexing (OFDM). In OFDM a large number of closely spaced orthogonal carriers are used to carry data on several parallel channels. A smaller number of the carriers are allocated […]
DVB-T2 and Large SFNs – Some Pros and Cons
Posted on September 17, 2013 Leave a Comment
DVB-T2 is today by far, the most advanced digital terrestrial television (DTT) system. It is much more flexible, robust, and efficient than any other DTT system. DVB-T2 uses OFDM modulation, and offers a wide range of different modes, making it a very flexible standard. Due to the multi-path immunity of OFDM, DVB-T2 allows the possibility […]
Three (3) Types of Reasons to Plan a Broadcast Network
Posted on September 11, 2013 Leave a Comment
Quality Reasons By a careful network planning, operators can provide their customers a robust and quality assured network. In an early stage, long before deployment of the network, problems can be found and solved. Economic Reasons The network must be financially viable. Deployment and operation costs must be weighed against the revenue. By a careful […]
A Simplified Description of Coverage Probability Calculations for OFDM Systems in Radio Network Planning Software
Posted on September 5, 2013 Leave a Comment
Orthogonal Frequency Division Multiplexing (OFDM) is a technique that is used in many popular wireless communication systems, such as digital terrestrial broadcast systems (DVB-T, DVB-T2, ISDB-T, DTMB, CMMB, T-DAB, T-DMB), wireless LAN, WiMAX, and LTE. OFDM works very well in radio channels where multipath propagation is particularly noticeable. Multipath propagation generates mainly two effects: intersymbol […]
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