Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Youngpo Lee"'
Publikováno v:
The Journal of Korea Information and Communications Society. :359-364
In this paper, we propose a direct sequence ultra wideband (DS-UWB) radar system based on correlation accumulation in the fields of the ship traffic control and the safe ship operation including docking guidance systems. The proposed DS-UWB radar sys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c293a9b0c00a05f24246a8c5906b8cc
https://doi.org/10.7840/kics.2013.38c.4.359
https://doi.org/10.7840/kics.2013.38c.4.359
Publikováno v:
The Journal of Korean Institute of Communications and Information Sciences. :943-951
In this paper, we propose a novel spectrum sensing scheme based on the order statistic for cooperative cognitive radio network in non-Gaussian noise environments. Specifically, we model the ambient noise as the bivariate isotropic symmetric -stable r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e37889cb755b46a6cb63ef0063f7a870
https://doi.org/10.7840/kics.2012.37a.11.943
https://doi.org/10.7840/kics.2012.37a.11.943
Publikováno v:
The Journal of Korea Information and Communications Society. 37:462-468
In this paper, an adaptive digital automatic gain control(AGC) algorithm with two stages is proposed. AGC technique is crucial for mobile communication equipment because path loss in wireless channel and gain fluctuation in receiver front-end continu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cdd1eef50655df8a0a01d3dcea24da8b
https://doi.org/10.7840/kics.2012.37.6c.462
https://doi.org/10.7840/kics.2012.37.6c.462
Publikováno v:
IEEE Communications Letters. 16:569-572
Based on a combination of the sub-correlation functions composing the autocorrelation of the binary offset carrier (BOC), we propose a novel cancellation scheme of correlation side-peaks to solve the ambiguity problem in the BOC signal tracking. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ccde25902cf760eab389ab0b3c8309c
https://doi.org/10.1109/lcomm.2012.020212.111917
https://doi.org/10.1109/lcomm.2012.020212.111917
Publikováno v:
The Journal of Korea Information and Communications Society. 36:581-588
In this paper, we propose a novel unambiguous code tracking scheme for cosine phased binary offset carrier (BOC) signals. We first obtain the sub-correlation functions composing the BOC autocorrelation function, and then, re-combine the sub-correlati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7b82018998198f8e8b4674221e68334
https://doi.org/10.7840/kics.2011.36c.9.581
https://doi.org/10.7840/kics.2011.36c.9.581
Publikováno v:
The Journal of Korean Institute of Communications and Information Sciences. 36:459-466
This paper addresses the problem in the acquisition of binary offset carrier (BOC) signals employed in global navigation satellite systems, which is caused by the multiple side-peaks of the BOC autocorrelation function. We first observe that the side
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::318cb632a2506f542a6b60ea9700d665
https://doi.org/10.7840/kics.2011.36c.7.459
https://doi.org/10.7840/kics.2011.36c.7.459
Publikováno v:
The Journal of Korea Information and Communications Society. 36:99-104
The chirp spread spectrum (CSS) technique spreads the data signal over a frequency bandwidth wider than minimum required bandwidth. By using time overlapping, the bit rate in CSS can be increased. However, for reliable transmission of data signal, th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71b65f69fc0d1a20cc5b3fcdbaa3686a
https://doi.org/10.7840/kics.2011.36c.2.99
https://doi.org/10.7840/kics.2011.36c.2.99
Publikováno v:
The Journal of Korea Information and Communications Society. 36:105-111
In this paper, we propose a novel Alamouti space-time transmission scheme for orthogonal frequency division multiplexing (OFDM) based asynchronous cooperative communication systems with low relay complexity. The conventional scheme requires an additi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8ba175224af0d5356567b1726f4723d
https://doi.org/10.7840/kics.2011.36c.2.105
https://doi.org/10.7840/kics.2011.36c.2.105
Publikováno v:
The Journal of Korea Information and Communications Society. 36:48-56
Cognitive radio (CR) systems have received significant interest as a promising solution to the spectral shortage problem through efficient use of the frequency spectrum by opportunistically exploiting unlicensed frequency bands. Orthogonal frequency
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d0b58bc1a4bde2536f642d11e5afb64
https://doi.org/10.7840/kics.2011.36c.1.48
https://doi.org/10.7840/kics.2011.36c.1.48
Publikováno v:
The Journal of Korea Information and Communications Society. 36:37-47
In this paper, we propose a novel ML decoding scheme based on the combination of depth- and breadth-first search methods on a partitioned tree for multiple input multiple output systems. The proposed scheme first partitions the searching tree into se
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aab663a6a439d13ba8e6af5a82ebe2cd
https://doi.org/10.7840/kics.2011.36c.1.37
https://doi.org/10.7840/kics.2011.36c.1.37