Pulse or digital communications – Equalizers – Automatic
Patent
1993-05-17
1995-05-09
Chin, Stephen
Pulse or digital communications
Equalizers
Automatic
36472419, 3647242, 375229, 375230, 375231, 375235, H03H 730, H03H 740
Patent
active
054147328
ABSTRACT:
Adaptive equalizers and processing methods wherein data required to implement an adaptation algorithm is sampled at a rate that is significantly lower than the symbol rate. The adaptation algorithm is processed at this reduced rate, in that updated tap coefficients, sample timing errors and symbol clock error signals are computed at this reduced rate. An advantage of the adaptive equalizer and processing method of the present invention is that the adaptation algorithm may be implemented in equipment that operates at a clock rate that is much less then the symbol rate. In particular, the adaptation algorithm may be computed using software that is resident in inexpensive general purpose digital processor, such as a personal computer, for example. A benefit of the adaptive equalizer and processing method of the present invention is that more sophisticated and more effective adaptation algorithms are practical when compared to adaptive equalizers using algorithms that are constrained to operate at higher symbol rates.
REFERENCES:
patent: 4635276 (1987-01-01), Karabinis
Chin Stephen
Float Kenneth W.
Karambelas Anthony W.
Loral Aerospace Corp.
Luu Huong
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