| Presentation | 2003/2/28 Implementation of Approximately Synchronized CDMA Modem on Digital LSI Suguru KAMEDA, Hiroki KOBAYASHI, Hiroyuki NAKASE, Kazuo TSUBOUCHI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have proposed an intracell uplink of a spread-spectrum code-division multiple-access (SS-CDMA) flexible wireless network based on approximately synchronized (AS) CDMA. Since the AS-CDMA has no co-channel interference, complicated transmission power control (TPC) is not required. In this paper, the AS-CDMA modem on field-programmable gate-arrays has been designed and implemented for the Japanese 2.4 GHz industrial, scientific and medical band. Using the implemented modem, the degradation of E_b/N_0 from the theoretical limit is 0.9dB at a bit error rate (BER) of 10^<-3>. Under 2-user environment, the E_b/N_0 penalty is 0.3dB at a BER of 10^<-3> when the desired-to-undesired signal ratio is -40dB and the carrier frequency offset of the undesired signal is 0.3ppm. Using the AS-CDMA with a 2-step open-loop TPC technique, the design of intracell uplink is available. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | SS-CDMA flexible wireless network / uplink / near-far problem / transmission power control (TPC) / approximately synchronized CDMA |
| Paper # | SST2002-146,A・P2002-245,RCS2002-362,MoMuC2002-171,MW2002-253 |
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| Conference Information | |
| Committee | AP |
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| Conference Date | 2003/2/28(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Antennas and Propagation (A・P) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Implementation of Approximately Synchronized CDMA Modem on Digital LSI |
| Sub Title (in English) | |
| Keyword(1) | SS-CDMA flexible wireless network |
| Keyword(2) | uplink |
| Keyword(3) | near-far problem |
| Keyword(4) | transmission power control (TPC) |
| Keyword(5) | approximately synchronized CDMA |
| 1st Author's Name | Suguru KAMEDA |
| 1st Author's Affiliation | Research Institute of Electrical Communication, Tohoku University() |
| 2nd Author's Name | Hiroki KOBAYASHI |
| 2nd Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| 3rd Author's Name | Hiroyuki NAKASE |
| 3rd Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| 4th Author's Name | Kazuo TSUBOUCHI |
| 4th Author's Affiliation | Research Institute of Electrical Communication, Tohoku University |
| Date | 2003/2/28 |
| Paper # | SST2002-146,A・P2002-245,RCS2002-362,MoMuC2002-171,MW2002-253 |
| Volume (vol) | vol.102 |
| Number (no) | 673 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |