Korea Telecom

Young-Hee Shin

Joon-Ho Lee

Yeon-Soo Kim

Hyun-Meen Jung

An apparatus for detecting the signals of transmission diversity based on space-time coding is disclosed. The apparatus and method for detecting signals of space-time coding performs linear interpolation and linear filtering to calculate the channel estimate of each transmission symbol from the channel estimate of each slot, thus providing the correct channel estimate even in a channel with considerable fluctuation. Further, the output control with estimation of SIR only passes a proper output of the demodulating and detecting circuit to improve the signal to noise ratio, maintaining enough communication quality even in a bad communication environment.

Apparatus and method for detecting signals of space-time coding based on transmission diversity

A method for predicting radio-wave propagation loss values of points located in a service area of a base station, includes the steps of: (a) calculating radio-wave propagation loss values of points located along with initial and next radial lines based on parameters defined by a user; (b) designating one of initial missed points as a target point; (c) searching first and second mapping points; (d) calculating radio-wave propagation loss values of the first and second mapping points; (e) calculating radio-wave propagation loss value of the target point by using the radio-wave propagation loss values of the first and second mapping points; (f) designating another initial missed point as the target point and repeating said steps (c) to (f) until radio-wave propagation loss values for all the initial missed points are calculated; and (g) designating the next radial line as an initial line and repeating said steps (a) to (g) to calculate the radio-wave propagation loss values of the radial points located on the radial lines and the missed points out of the radial lines.

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Seoul, South Korea

Young-Hee Shin