Samsung Electronics Co., Ltd.

Information and Communication University

Jin-Serk Baik

Joon-Oo Kim

Byung-jik Kim

Jeong-rok Park

Yun-Je Oh

Sung-Kweon Park

Sung-kweon Park

Do-Young Ha

Joong-Soo Ma

Myoung-Hwan Seo

Myoung-In Ji

Sung-Chang Choi

Disclosed is a frequency hopping modulation method in a communication system. The method includes: generating a frequency hopping pattern according to a hopping frequency's level; generating a hopping frequency through use of the frequency hopping pattern; modulating an original signal to a frequency hopping spread signal by multiplying the original signal by the hopping frequency; generating a chirp pulse code for diversifying the frequency hopping spread signal; and modulating the frequency hopping spread signal to a chirp pulse signal by multiplying the frequency hopping spread signal by the chirp pulse code.

Frequency hopping modulation apparatus and method in communication system

Provided is a location measurement method of a mobile node using a predictive filter is provided for improving the location measurement accuracy of the mobile node. The location measurement method of a mobile node detects change of movement pattern of the mobile node, corrects weights of a location measurement period and a predictive filter depending on the change of movement pattern, and compensates a location of the mobile node using the corrected weights of the location measurement period and predictive filter.

Location measurement method based on predictive filter

A method and apparatus for measuring a distance in a wireless environment are provided, in which a first device transmits a distance measurement signal to a second device and receives at least one response signal for the distance measurement signal from the second device, matches the received response signal with a reference signal to detect an earliest response signal, and calculates a time taken from the transmission of the distance measurement signal to the second device and the reception of the response signal from the second device using a peak value of the matched reference signal.

Method and apparatus for measuring distance in a wireless environment

Growing community of inventors

Ansan-si, South Korea

Jin-Serk Baik