Gardner 算法原文

4.6 Gardner Algorithm

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Figure 4.10: Self-noise in two-point difference algorithm.

4.6 Gardner Algorithm

The algorithmis based on delay differencing betweenthe currentsample and another

sample delayed by half the symbol period, i.e.

x

d

(t)=p

r

(t)

becomes independent of the carrier phase. Substituting the early sampling time,

t

e

= nT +

τ

, and the late sampling time, t

l

= nT +

τ

+ T / 2 in (4.38) gives

p

2

r

(

τ

+[n

1]T)