Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Wooncheol Hwang"'
Publikováno v:
IEEE Transactions on Consumer Electronics. 46:363-367
We deal with the carrier frequency synchronization of the orthogonal frequency division multiplexing (OFDM) system and propose a multiple guard interval based frequency error detector (GIB FED) using a set of consecutive guard interval data for OFDM
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e46829394f2b6845094478ba8366aedb
https://doi.org/10.1109/30.846671
https://doi.org/10.1109/30.846671
Publikováno v:
IEEE Transactions on Consumer Electronics. 46:1021-1025
This paper deals with the synchronization scheme for wireless LAN systems using OFDM. We propose an improved frequency synchronization scheme which uses a modified burst format and a dual window to find the frame timing and frequency offset. We compa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af7400f41579d6d09c530a714c6c1d33
https://doi.org/10.1109/30.920456
https://doi.org/10.1109/30.920456
Autor:
Wooncheol Hwang, Kiseon Kim
Publikováno v:
IEEE Transactions on Consumer Electronics. 44:1323-1328
Orthogonal frequency division multiplexing (OFDM) is a very popular scheme for signaling at high data rates over the time-dispersive multipath channel. We analyze the symbol error probability of OFDM on the shadowed multipath channels, and present th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d6684524b510476b97553e72963f14e
https://doi.org/10.1109/30.735833
https://doi.org/10.1109/30.735833
Publikováno v:
IEEE Communications Letters. 7:581-583
We derive an approximate expression for signal-to-noise ratio (SNR) degradation of orthogonal frequency division multiplexing due to carrier frequency offset over a shadowed multipath channel, to explicitly show the effects of system and channel para
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1dc2e7c7491243acc81ecc3a0e12d656
https://doi.org/10.1109/lcomm.2003.821333
https://doi.org/10.1109/lcomm.2003.821333
Publikováno v:
Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324).
This paper presents a case of design and implementation of a high-speed burst QPSK (quaternary phase shift keying) receiver. Since the PSK modulation transmits its information within the phase, the baseband digital receiver can recover the transmitte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a44c97d99fee6e7f72f5492102add1c6
https://doi.org/10.1109/vetecf.1999.798459
https://doi.org/10.1109/vetecf.1999.798459
Publikováno v:
The 5th International Symposium on Wireless Personal Multimedia Communications.
We evaluate the BER performance of the subchannel power controlled OFDM system considering more practical cases including the limitation in word length in subchannel power control tap-weights and the time-varying multipath channel. According to simul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f8faa970e49c5991ce9decae069e1e61
https://doi.org/10.1109/wpmc.2002.1088331
https://doi.org/10.1109/wpmc.2002.1088331
Publikováno v:
The 5th International Symposium on Wireless Personal Multimedia Communications.
The performance of orthogonal frequency division multiplexing (OFDM) using postdetection-combining-based macrodiversity is analyzed on a shadowed multipath channel, and the effects of correlated shadowing are investigated. We show that the postdetect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de61b3a99402c4198bc5d7bfd18ec610
https://doi.org/10.1109/wpmc.2002.1088214
https://doi.org/10.1109/wpmc.2002.1088214
Performance analysis of the OFDM system with one tap equalizer against the two-ray multipath channel
Publikováno v:
Proceedings of IEEE. IEEE Region 10 Conference. TENCON 99. 'Multimedia Technology for Asia-Pacific Information Infrastructure' (Cat. No.99CH37030).
Orthogonal frequency division multiplexing (OFDM) is a suitable transmission scheme for high-speed transmissions in a multipath environment. It is well known that a guard interval (GI) reduces the inter-symbol interference (ISI) and inter-channel int
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b7f7d1e5758a65fbb677a897213fc6d
https://doi.org/10.1109/tencon.1999.818345
https://doi.org/10.1109/tencon.1999.818345
Publikováno v:
ICCE. International Conference on Consumer Electronics (IEEE Cat. No.01CH37182).
We propose a subchannel power controlled COFDM system for wireless-LAN to support multimedia services. The proposed system gives about 3.1 dB gain in E/sub b//N/sub 0/ to support the required packet error rate, 10/sup -2/, compared with the conventio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5971fa1124ed904f352cdb10a1f68f70
https://doi.org/10.1109/icce.2001.935210
https://doi.org/10.1109/icce.2001.935210
Publikováno v:
ICC
We propose the OFDM system with a subchannel power control, which transmits data with a variable power for each subchannel based on the received SNR. The OFDM system, employing a subchannel power control with a grouping coefficient equal to 3, gives
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53bea19f8d8f51adf56a39e01fb4b7df
https://doi.org/10.1109/icc.2001.937112
https://doi.org/10.1109/icc.2001.937112