Abstract: There is provided a channel estimation apparatus for estimating a radio channel environment by multiplying a currently received bit signal of a pilot signal and previously received bit signals by weights, and summing the weighted currently received bit signal and the weighted previously received bit signals in a CDMA mobile communication system receiving the pilot signal comprised of a stream of bits having given bit values, and a power control signal comprised of power control bits. In the channel estimation, a predictor predicts a next bit signal succeeding the currently received bit signal, multiplies the predicted next bit signal by a weight, and generates a weighted next bit signal. A summer sums the weighted next bit signal from the predictor, the weighted currently received bit signal and the previously received bit signals.

Abstract: There is provided a channel estimation apparatus for estimating a radio channel environment by multiplying a currently received bit signal of a pilot signal and previously received bit signals by weights, and summing the weighted currently received bit signal and the weighted previously received bit signals in a CDMA mobile communication system receiving the pilot signal comprised of a stream of bits having given bit values, and a power control signal comprised of power control bits. In the channel estimation, a predictor predicts a next bit signal succeeding the currently received bit signal, multiplies the predicted next bit signal by a weight, and generates a weighted next bit signal. A summer sums the weighted next bit signal from the predictor, the weighted currently received bit signal and the previously received bit signals.

Abstract: A thermal printer head (TPH) heating method for minimizing the change of temperature and voltage of the TPH and an apparatus adopting the same, including the steps of: generating successive gradation values which oscillate between the minimum and the maximum gradation values and converges on a medium value M; comparing the gradation value generated in the gradation value generating step with the pixel value; and providing the result of the comparing step to the TPH. Therefore, the heat accumulation phenomenon is reduced by uniformly distributing the heat amount of the TPH over the time and space axes so that the TPH function is improved.