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With the aim of understanding the high-speed mobile reception characteristics
of digital terrestrial broadcasting on Shinkansen (bullet train)
super-express railways, reception experiments on a running Shinkansen
were conducted over the distance between Sendai Station and Ichinoseki
Station (70 km). A digital terrestrial broadcasting signal was received
on a Shinkansen running at a speed of approximately 275 km/h, and
data including electric field strength and bit error rate were collected.
This experiment revealed that error-free reception was feasible
approximately 75% of the time when using the 16QAM carrier with
1/2 convolutional code modulation and approximately 90% of the time
when using the QPSK scheme with 1/2 convolutional code modulation
(these figures exclude time spent in tunnels). Further investigation
is scheduled on a diversity reception system and on ways to improve
reception in tunnels by using broadcast wave re-transmission.
Note: This experiment was conducted in cooperation with the East Japan Railway Company Technical Development & Research Department and TAO Research & Development Facilities of Terrestrial Digital Broadcasting System for Cooperative Usage in Sendai.
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