Wireless relay apparatus, wireless receiving apparatus, and decoding method
First Claim
1. A wireless apparatus comprising:
- a first decoder to perform a first decoding process of calculating a first a posteriori value using a first a priori value and a first frame transmitted from a first apparatus, and output a hard decision value of the first a posteriori value and a first external value;
a second decoder to perform a second decoding process of calculating a second a posteriori value using a second a priori value and a second frame transmitted from a second apparatus, and output a hard decision value of the second a posteriori value and a second external value, the second apparatus having received the first frame, the second frame containing re-encoded data of the first frame containing an error;
an error rate estimator to estimate an error rate of one of the first frame or the second frame;
a first a priori value calculator to calculate the second a priori value by correcting the first external value based on the error rate; and
a second a priori value calculator to calculate the first a priori value by correcting the second external value based on the error rate.
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Abstract
In one embodiment, a wireless relay apparatus for replaying a signal processed by first encoding from a transmitting apparatus to a receiving apparatus is disclosed. The apparatus includes a demodulation unit, a decoding unit, a detection unit, an extraction unit, and an encoding unit. The demodulation unit demodulates a received signal. The decoding unit performs error correction decoding corresponding to the first encoding on the demodulated signal. The detection unit detects an error in a decoded signal. The extraction unit extracts a portion pertaining to information data from the demodulated signal by hard decision, if the detection unit detects an error. The encoding unit performs error correcting coding on the extracted portion pertaining to the information data with an error. The information data encoded by the encoding unit is transmitted.
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Citations
13 Claims
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1. A wireless apparatus comprising:
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a first decoder to perform a first decoding process of calculating a first a posteriori value using a first a priori value and a first frame transmitted from a first apparatus, and output a hard decision value of the first a posteriori value and a first external value; a second decoder to perform a second decoding process of calculating a second a posteriori value using a second a priori value and a second frame transmitted from a second apparatus, and output a hard decision value of the second a posteriori value and a second external value, the second apparatus having received the first frame, the second frame containing re-encoded data of the first frame containing an error; an error rate estimator to estimate an error rate of one of the first frame or the second frame; a first a priori value calculator to calculate the second a priori value by correcting the first external value based on the error rate; and a second a priori value calculator to calculate the first a priori value by correcting the second external value based on the error rate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of a wireless apparatus comprising:
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performing a first decoding process of calculating a first a posteriori value using a first a priori value and a first a first frame transmitted from a first apparatus, and outputting a hard decision value of the first a posteriori value and a first external value; performing a second decoding process of calculating a second a posteriori value using a second a priori value and a second frame transmitted from a second apparatus, and outputting a hard decision value of the second a posteriori value and a second external value, the second apparatus having received the first frame, the second frame containing re-encoded data of the first frame containing an error; estimating an error rate of one of the first frame or the second frame; calculating the second a priori value by correcting the first external value based on the error rate; and calculating the first a priori value by correcting the second external value based on the error rate. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification