04 | Keysight | DTMB (CTTB) X-Series Measurement Application N6156A & W6156A - Technical Overview

Technology Overview

Digital terrestrial/television multi-

media broadcasting (DTMB), also

known as China terrestrial television

broadcasting (CTTB), is the Chi-

nese national terrestrial digital TV

broadcasting standard which was

announced on August 18, 2006 and

implemented from August 1, 2007.

DTMB supports both multi-carrier

(C=3780) and single-carrier (C=1)

modulation scheme. Both schemes

use low density parity check (LDPC)

coding in forward error correction

(FEC), which can provide superior

error correction capability for a bet-

ter sensitivity especially at higher

code rate. Time domain synchronized

orthogonal frequency division multi-

plexing (TDS-OFDM ) is implemented

to deliver fast system synchronization

and precise channel estimation.

The DTMB (CTTB) measurement ap-

plication gives more convenience to

your DTMB (CTTB) system develop-

ment and manufacturing, including

both multi-carrier and single-carrier

schemes with one-button measure-

ments including standard presets and

remote SCPI programming capabili-

ties on X-Series signal analyzers.

Figure 1. Block diagram of DTMB (CTTB) system

Scrambler

Mapping

and

interleaver

MUX

Frame head

Frame

body

processing

Combine

Baseband

processing

Up

converter

RF

output

System

information

FEC

Data

input