• The Journal of Korean Institute of Communications and Information Sciences
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• v.23 no.8
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• pp.2052-2063
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• 1998

Various full-scale radio location systems have been developed since ground-based radio navigation systems appeared during World War II, and more recently global positioning systems (GPS) have been widely used as a representative location system. In addition, radio location systems based on cellular systems are intensively being studied as cellular services become more and more popular. However, these studies have been focused mainly on macrocellular systems of which based stations are mutually synchronized. There has been no study about systems of which based stations are asynchronous. In this paper, we proposed two radio location algorithms in microcellular CDMA systems of which base stations are asychronous. The one is to estimate the position of a personal station at the center of rectangular shaped area which approximates the realistic common area. The other, as a method based on road map, is to first find candidate positions, the centers of roads pseudo-range-distant from the base station which the personal station belongs to and then is to estimate the position by monitoring the pilot signal strengths of neighboring base stations. We compare these two algorithms with three wide-spread algorithms through computer simulations and investigate interference effect on measuring pseudo ranges. The proposed algorithms require no recursive calculations and yield smaller position error than the existing algorithms because of less affection of non-line-of-signt propagation in microcellular environments.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.36 no.3
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• pp.37-47
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• 2018

This study was attempted to understand present status and characteristics of landscape components of the domestic Korean Gugokwonlim created by the classical scholars in the Joseon Dynasty. The results are as follows. First, Distribution of Gukokwonlim in Korea shows that 55(51.4%) are located in Daegu and Gyeongsangbuk-do, and 22(20.56%) are located in Chungcheongbuk-do. Concentrated locations of Gugok are on the part of Baekdudaegan, from Sobaeksan mountain to Sokrisan mountain via Wolaksan mountain, and the Nakdong River basin of the Nakdong vein in the right bank. This consideration seems to be closely related to the academy of Yeongnam Confucianism and the their trend of Wonrim enjoyment. Second, according to the result of examining the distribution of Gugok according to the basic local government authority, The biggest number of the Gugok places(10 places, 9.35%) are located in Andong, which is called 'the capital of Korean spiritual culture.' Additionally in order, 9 places(9.45%) is located in Goesan, 8 places(7.48%) in Mungyung, 6 places(5.61%) in Bonghwa, and 5 places(4.67%) in Yeongju. Third, in order to the creating time of Gugokwonlim, 33 (33.0%) were created in $18^{th}$ century, and other 33 (33.0%) were created in $19^{th}$ century. In addition, 14 were created during $20^{th}$ century, while 13 were created in $17^{th}$ century. And 4 were created in $16^{th}$ century. Respectively. great number of $18^{th}$ and $19^{th}$ centuries shows that many(66.0%) Gugokwonrim were created between late 18th to 19th centuries. Fourth, There were 97(90.65%) of 'Gugok' in the form of collecting type, and a total number of bottom-up style Gugok were 99(92.5%) while top-down style Gugok were 8(7.5%). Fifth, Among the contents of Gugok, 67 were found in pome of Gugok(64.49%), 29 caved letters in rock(27.10%), and 16 in painting of Gugok(14.95%). Sixth, The most emerged landscape components of Gugok was Dae(臺) 124(13.05%), followed by Am(巖) 115[11.2%, including of Am(岩)] 115(11.2%), and Dam(潭) 73(7.68%), Jeong(亭) 48(5.05%), Dong(洞) 39(4.10%), San(山) 36(3.78%), Am(岩, rocks) 31(3.26 %), Bong(峯, peaks) 27(2.84%), Yeon(淵) 23(2.42%) and Chun(川) and Tan(灘) 22(2.31%). Mostly, common landscape components of Gugok are entrusted natural things. It is expected that more studies about the analysis of characteristics of Gugok's positioning types considering total distance and a gradient are required to understand more clearly characteristics and location distribution of true Gugok and its landscape components.