The Journal of the Acoustical Society of Korea
- Volume 16 Issue 2E
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- Pages.47-54
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- 1997
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- 1225-4428(pISSN)
Intersymbol Interferences Due to Mismatched Roll-off Factors and Sampling-Time Jitter in a Gaussian Noise Channel
- Park, Seung Keun (Department Korea electronics and Telecomunications Research Institute) ;
- Mok, Jin Dam (Department Korea electronics and Telecomunications Research Institute) ;
- Na, Sang Sin (School of Electrical and Electronics Engineering, Ajou Univ.)
- Published : 1997.09.01
Abstract
This paper presents two results on intersymbol interferences in baseband digital communication over an additive white Gaussian noise channel-the interferences due to mismatched square-root raised-cosine filters, in which the filters have different roll-off factors, and / or due to sampling-time jitter. The result for the mismatched filters is that even the jitter-free sampling causes intersymbol interference and it is negligibly small for a wide range of signal-to-noise ratio up to 10dB, for the roll-off factor ranging from 0.2 to 0.5, the mismatch loss being within 0.1dB from the optimum at around 10-6 .For jitter interference an approximation formula for the bit error probability is derived in case of the matched filters, which shows how the roll-off factors and the amount of jitter affect the system performance. The formula is reasonably accurate.
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