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Comparison of Two Different Upsampling Methods Used for Interpolation in Symbol Timing Recovery in Digital Receivers

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2 Author(s)
Tao Cheng ; Sch. of Electron. & Inf. Eng., Beijing Jiaotong Univ. ; Liu Liu

The digital method for symbol timing recovery has been used for several years and many scholars have proposed a great deal of methods for it. This paper describes the fundamentals of interpolation for timing recovery, and compares the differences between the two upsampling: zero-insertion expander and zero-order-hold expander used before the symbol timing interpolation. It is shown that, through simulation, zero-order-hold expander performs better than zero-insertion expander in the frequency domain, and has better attenuation for signal images caused by upsampling using the same low band filter.

Published in:

Advanced Communication Technology, The 9th International Conference on  (Volume:2 )

Date of Conference:

12-14 Feb. 2007