DTTB System Impulse Noise Character

0

3

15

30

15

19

35

Multipath Level ( - dB)

(Single Echo)

8VSB

COFDM

(64QAM,2/3,1/8)

C/N Threshold (dB)

Indoor Antenna

Outdoor Antenna

W.T.Dickson 29 March 98

(Conditions: Static multipath, Equal Rx NF, No Co-channel, but with impulse interference)

COFDM

With impulse noise

Dependent upon

level and character

of impulse noise

(up to 10 dB higher

than 8VSB)

Picture

No Picture

(above curve)

(Below curve)

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