Presentation | 2003/11/13 Multiple Access Interference in Frequency-Selective Fading Channels on Uplink MC-CDMA Takashi SHONO, Tomoyuki YAMADA, Kiyoshi KOBAYASHI, Katsuhiko ARAKI, Iwao SASASE, |
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Abstract(in Japanese) | (See Japanese page) |
Abstract(in English) | MC-CDMA has been attracting considerable attention for future broadband mobile communications due to its robustness against delay and its high bandwidth efficiency in the multi-cell environment. In the uplink, however, the asynchronous reception of each user's OFDM symbols and the inter-code interference (ICI) caused by the independent frequency-selective fading channel of each user result in multiple access interference (MAI). In this report, we evaluate the ICI in frequency-selective fading channels on uplink MC-CDMA. At first, we derive theoretical expressions for the desired-to-undesired signal power ratio (DUR) as ICI for arbitrary spreading sequences and validate them by comparison with computer simulations using a Walsh-Hadamard code. Based on the results of a theoretical analysis, we calculate the optimum spreading sequence that maximizes the performance of uplink MC-CDMA. Two symbol combining methods are examined : equal gain combining (EGC) and maximum ratio combining (MRC). |
Keyword(in Japanese) | (See Japanese page) |
Keyword(in English) | MC-CDMA / OFDM / inter-code interference / desired-to-undesired signal power ratio |
Paper # | A・P2003-174,RCS2003-180 |
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Committee | RCS |
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Conference Date | 2003/11/13(1days) |
Place (in Japanese) | (See Japanese page) |
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Topics (in Japanese) | (See Japanese page) |
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Paper Information | |
Registration To | Radio Communication Systems (RCS) |
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Language | ENG |
Title (in Japanese) | (See Japanese page) |
Sub Title (in Japanese) | (See Japanese page) |
Title (in English) | Multiple Access Interference in Frequency-Selective Fading Channels on Uplink MC-CDMA |
Sub Title (in English) | |
Keyword(1) | MC-CDMA |
Keyword(2) | OFDM |
Keyword(3) | inter-code interference |
Keyword(4) | desired-to-undesired signal power ratio |
1st Author's Name | Takashi SHONO |
1st Author's Affiliation | NTT Network Innovation Laboratories, NTT Corporation() |
2nd Author's Name | Tomoyuki YAMADA |
2nd Author's Affiliation | NTT Network Innovation Laboratories, NTT Corporation |
3rd Author's Name | Kiyoshi KOBAYASHI |
3rd Author's Affiliation | NTT Network Innovation Laboratories, NTT Corporation |
4th Author's Name | Katsuhiko ARAKI |
4th Author's Affiliation | NTT Network Innovation Laboratories, NTT Corporation |
5th Author's Name | Iwao SASASE |
5th Author's Affiliation | NTT Network Innovation Laboratories, NTT Corporation |
Date | 2003/11/13 |
Paper # | A・P2003-174,RCS2003-180 |
Volume (vol) | vol.103 |
Number (no) | 459 |
Page | pp.pp.- |
#Pages | 8 |
Date of Issue |