| Presentation | 2003/10/10 Analysis on Tradeoff between Frequency Diversity and Inter-Code Interference Considering Fading Correlation in Forward Link for VSF-OFCDM Wireless Access Tony Q.S. Quek, Noriyuki Maeda, Hiroyuki Atarashi, Mamoru Sawahashi, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper investigates the frequency diversity and inter-code interference tradeoff relationship in Variable Spreading Factor-Orthogonal Frequency and Code Division Multiplexing (VSF-OFCDM) wireless access in the forward frequency-selective (multipath) fading channel. In the paper, we establish the tradeoff relationship based on the numerical analysis considering that the different sub-carriers experience a correlated flat fading channel depending on the spreading factor and delay spread for coherent maximum ratio combining (MRC) and linear minimum mean square error (LMMSE) combining. Then, we derive the instantaneous output signal-to-interference plus noise power ratio (SINK.) and compute the average bit error rate (BER) by using the approach for M-array data modulation such as M-QAM as well as QPSK modulation. We compute the average BER for QPSK and 16QAM numerically and verify the analytical results by computer simulation. Using the average BER, we then numerically investigate the diversity-interference tradeoff relationship for each combiner with respect to different system parameters such as the spreading factor, system load, modulation scheme, and different channel conditions such as the delay spread. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Frequency diversity / Inter-code interference / VSF-OFCDM / MRC / LMMSE combining / QPSK / M-QAM |
| Paper # | RCS2003-143 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2003/10/10(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| 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) | Analysis on Tradeoff between Frequency Diversity and Inter-Code Interference Considering Fading Correlation in Forward Link for VSF-OFCDM Wireless Access |
| Sub Title (in English) | |
| Keyword(1) | Frequency diversity |
| Keyword(2) | Inter-code interference |
| Keyword(3) | VSF-OFCDM |
| Keyword(4) | MRC |
| Keyword(5) | LMMSE combining |
| Keyword(6) | QPSK |
| Keyword(7) | M-QAM |
| 1st Author's Name | Tony Q.S. Quek |
| 1st Author's Affiliation | Laboratory for Information and Decision Systems, Massachusetts Institute of Technology() |
| 2nd Author's Name | Noriyuki Maeda |
| 2nd Author's Affiliation | Wireless Laboratories, NTT DoCoMo, Inc. |
| 3rd Author's Name | Hiroyuki Atarashi |
| 3rd Author's Affiliation | Wireless Laboratories, NTT DoCoMo, Inc. |
| 4th Author's Name | Mamoru Sawahashi |
| 4th Author's Affiliation | Wireless Laboratories, NTT DoCoMo, Inc. |
| Date | 2003/10/10 |
| Paper # | RCS2003-143 |
| Volume (vol) | vol.103 |
| Number (no) | 363 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |