W6153A Datasheet, PDF (4/15 Pages) Keysight Technologies – X-Series Measurement Application

04 | Keysight | N6153A & W6153A DVB-T/H with T2 X-Series Measurement Application - Technical Overview
DVB-T/H Standards Overview
Digital video broadcasting-terres-
trial/handheld (DVB-T/H) is the Eu-
ropean-based consortium standard
for broadcast transmission of digital
terrestrial/handheld television.
DVB-T
DVB-T is a flexible system that al-
lows networks to be designed for
the delivery of compressed digital
audio, video, and other data in an
MPEG transport stream using OFDM
modulation with concatenated chan-
nel coding (i.e. COFDM). It is the most
widely adopted digital terrestrial
television broadcasting standard in
the world and is deployed in more
than 30 countries.
In DVB-T, the use of OFDM modula-
tion with appropriate guard interval
allows optimal tradeoff between
network topology and frequency
efficiency. The capacity for hierar-
chical modulation can enable two
completely separate data streams to
transmit in a single signal which can
be used to trade off bit rate versus
ruggedness. DVB-T has the following
technical characteristics that make it
a very flexible system.
DVB-H
DVB-H is an extension of the DVB-T
standard, which takes into account
the handheld receiver’s specific
properties such as the small size,
light weight, portability, and battery
operation.
DVB-H uses a time slicing technique
which results in a large battery power
saving effect, and introduces a multi-
protocol encapsulation forward error
correction (MPE-FEC) scheme for
reliable transmission in poor signal
reception conditions. A transmission
mode of 4k is defined in DVB-H to
offer a tradeoff between the trans-
mission cell size and mobile reception
capabilities.
The complexity of the DVB-T/H stan-
dards demands flexibility and excel-
lent modulation analysis for system
development and evaluation.
DVB-T2
The DVB-T2 standard, defined in
ETSI EN 302 755, is an extension of
the existing DVB-T standard, aim-
ing to provide a minimum of 30%
capacity increase over the DVB-T,
improving single-frequency-network
(SFN) performance, service specific
robustness, better error correction
ability, and bandwidth and frequency
flexibility.
A new technology, called Rotated
Constellation, is used and provides
significant additional robustness in
difficult channels. DVB-T2 defines
two modes: Mode A (single PLP) and
Mode B (multi-PLPs). A multi-PLPs
mechanism is provided to separately
adjust the robustness of each deliv-
ery service within a channel to meet
the required reception conditions.
Furthermore, a receiver can save
power by decoding only a single ser-
vice rather than the entire multiplex
of service.
Table 1. Key parameters in DVB-T, DVB-H, and DVB-T2 standards
DVB-T
DVB-H
Frequency
VHF-III (170 to 230 MHz)
UHF-IV/V (470 to 862 MHz)
VHF-III (170 to 230 MHz)
UHF-IV/V (470 to 862 MHz)
L (1.452 to 1.492 GHz)
Bandwidth
5, 6, 7, 8 MHz
5, 6, 7, 8 MHz
Modulation
OFDM
OFDM
FFT size
2K, 8K
2K, 4K, 8K
Modulation format
QPSK/16QAM/64QAM
QPSK/16QAM/64QAM
Guard interval
1 /4, 1 /8, 1/16, 1/32
1 /4, 1 /8, 1/16, 1/32
FEC
Convolution + Reed Solomon
1 /2, 2/3, 3 /4, 5/6, 7 /8
Constellation rotation
MIMO Support
Stream
Bit rate
Other
No
SISO
MPEG-2 TS
4.976 ~ 31.668 Mb/s
Convolution + Reed Solomon
1 /2, 2/3, 3 /4, 5/6, 7 /8,
and MPE-FEC
No
SISO
DVB-IPDC and MPEG-2 TS
4.976 ~ 31.668 Mb/s
Time slicing
DVB-T2
VHF-III (170 to 230 MHz)
UHF-IV/V (470 to 862 MHz)
1.7, 5, 6, 7, 8, 10 MHz
OFDM
1K, 2K, 4K, 8K, 16K, 32K
QPSK,16/64/256QAM
1 /4, 19/256, 1 /8, 19/128, 1/16,
1/32, 1/128
LDPC+BCH
1 /2, 3/5/, 2/3, 3 /4, 4/5, 5/6
Yes
SISO, MISO
TS, GSE, GCS, or GFPS
Up to 50.34 Mb/s