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Conference Paper: Effect of fast fading on hybrid detection in VSF-OFCDM systems
Title | Effect of fast fading on hybrid detection in VSF-OFCDM systems |
---|---|
Authors | |
Keywords | Communications |
Issue Date | 2004 |
Publisher | IEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000104 |
Citation | Ieee International Conference On Communications, 2004, v. 6, p. 3294-3298 How to Cite? |
Abstract | This paper presents an analytical study on the variable spreading factor (VSF) orthogonal frequency and code division multiplexing (OFCDM) system over a fast fading channel. Hybrid multi-code interference (MCI) cancellation and minimum mean square error (MMSE) detection is proposed in the system as an efficient way to eliminate MCI. It is shown that the optimum power ratio of pilot channel to one data channel is about 0.25K, where K is the total number of data channels. When the Doppler frequency fD is less than 200Hz, the effect of the Doppler on the system performance is negligible. However, increasing fD from 200Hz degrades the system performance rapidly. Although the gap in BER between the hybrid and pure MMSE detection decreases as fD increases, the gap is still large as long as fD is less than around 800Hz. For a wide range of Doppler shift, a larger frequency domain spreading factor (NF) is expected, whereas a smaller time domain spreading factor (NT) provides better performance when fD increases. |
Persistent Identifier | http://hdl.handle.net/10722/46498 |
ISSN | 2023 SCImago Journal Rankings: 0.861 |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Zhou, Y | en_HK |
dc.date.accessioned | 2007-10-30T06:51:19Z | - |
dc.date.available | 2007-10-30T06:51:19Z | - |
dc.date.issued | 2004 | en_HK |
dc.identifier.citation | Ieee International Conference On Communications, 2004, v. 6, p. 3294-3298 | en_HK |
dc.identifier.issn | 0536-1486 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/46498 | - |
dc.description.abstract | This paper presents an analytical study on the variable spreading factor (VSF) orthogonal frequency and code division multiplexing (OFCDM) system over a fast fading channel. Hybrid multi-code interference (MCI) cancellation and minimum mean square error (MMSE) detection is proposed in the system as an efficient way to eliminate MCI. It is shown that the optimum power ratio of pilot channel to one data channel is about 0.25K, where K is the total number of data channels. When the Doppler frequency fD is less than 200Hz, the effect of the Doppler on the system performance is negligible. However, increasing fD from 200Hz degrades the system performance rapidly. Although the gap in BER between the hybrid and pure MMSE detection decreases as fD increases, the gap is still large as long as fD is less than around 800Hz. For a wide range of Doppler shift, a larger frequency domain spreading factor (NF) is expected, whereas a smaller time domain spreading factor (NT) provides better performance when fD increases. | en_HK |
dc.format.extent | 472779 bytes | - |
dc.format.extent | 1965 bytes | - |
dc.format.mimetype | application/pdf | - |
dc.format.mimetype | text/plain | - |
dc.language | eng | en_HK |
dc.publisher | IEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000104 | en_HK |
dc.relation.ispartof | IEEE International Conference on Communications | en_HK |
dc.rights | ©2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. | - |
dc.subject | Communications | en_HK |
dc.title | Effect of fast fading on hybrid detection in VSF-OFCDM systems | en_HK |
dc.type | Conference_Paper | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1044-4556&volume=6&spage=3294&epage=3298&date=2004&atitle=Effect+of+fast+fading+on+hybrid+detection+in+VSF-OFCDM+systems | en_HK |
dc.description.nature | published_or_final_version | en_HK |
dc.identifier.doi | 10.1109/ICC.2004.1313155 | en_HK |
dc.identifier.scopus | eid_2-s2.0-4143082899 | en_HK |
dc.identifier.hkuros | 93028 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-4143082899&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 6 | en_HK |
dc.identifier.spage | 3294 | en_HK |
dc.identifier.epage | 3298 | en_HK |
dc.identifier.issnl | 0536-1486 | - |