Apparatus for estimating phase error and phase error...

Details Apparatus for estimating phase error and phase error... Apparatus for estimating phase error and phase error...

2006-09-11

2011-10-25

Ha, Dac (Department: 2611)

Pulse or digital communications

Receivers

C375S226000, C375S326000, C375S340000, C714S780000, C702S181000, C704S240000

Reexamination Certificate

active

08045646

ABSTRACT:
Provided are an apparatus for estimating a phase error and a phase error correcting system using the phase error estimating apparatus. The apparatus includes: a probability value estimating unit for estimating a negative log probability value for each transmission symbol by transforming a soft output information transferred from the outside to a log A posterior probability ratio (LAPPR) value; an APP value calculating unit for calculating a posterior probability (APP) value by applying a negative exponential function to the transmission symbol; an average value deciding unit for deciding an average value for each transmission symbol using the probability information entirely, partially, or selectively according to a probability information type; and a symbol phase estimating unit for estimating a phase of a symbol based on the decided average value.

REFERENCES:
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patent: 2002/0150168 (2002-10-01), Crawford
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patent: 10-2006-0072096 (2006-06-01), None
Vincenzo Lottici et al., “Embedding Carrier Phase Recovery Into Iterative Decoding of Turbo-Coded Linear Modulations”, IEEE Transactions on Communications, vol. 52, No. 4, Apr. 2004, pp. 661-669.
International Search Report for PCT/KR2006/003601 dated Dec. 26, 2006.

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