| Presentation | 2003/11/13 Considerations on new Modulation Methods for Spectram Efficiency Gen-ichiro Ohta, Mitsuru Uesugi, Takuro Sato, Hideyoshi Tominaga, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The various wireless systems require much more frequency resources. We have to cultivate new solutions to settle this issue. The main stream of modulation development has two directions. One is multi-dimensional modulation and another is single side band modulation technology. The authors have tried to make progress on both ways. The common target is to provide orthogonal I-Q planes, which provide four information fields. As for the multi-dimensional modulation approach, the third axis on the I-Q plane is a differential phase. The cosine waves for the carrier should be a higher harmonics of the symbol frequency by 2n+1, here n is an integer. This modulation looks like a doubled QPSK, giving four bits on the same bandwidth of QPSK. A simulation result clarifies the proposed method has better BER than 16QAM. The degradation of BER in comparison with QPSK is less than 0.5dB On the other hand, as for the SSB-QPSk, the third axis on the I-Q plane is the complex frequency. The two QPSK are modulated to a USB and an LSB respectively. These USB and LSB are placed on the same half-band. The demodulator is consisted of two SSB modulators. In an AWGN environment, a simulation result clarifies the proposed method has better BER than 16QAM. The degradation of BER in comparison with QPsk is less than 0.5dB, too. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Spectral Efficiency / Orthogonal QPSK system / Four-phase Orthogonal Modulation / QUadrature-Quadrature Phase-Shift Keying / Nyquist Transmission / Hilbert Transform / Sigle Side Band |
| Paper # | A・P2003-178,RCS2003-184 |
| Date of Issue |
| Conference Information | |
| Committee | RCS |
|---|---|
| Conference Date | 2003/11/13(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Considerations on new Modulation Methods for Spectram Efficiency |
| Sub Title (in English) | |
| Keyword(1) | Spectral Efficiency |
| Keyword(2) | Orthogonal QPSK system |
| Keyword(3) | Four-phase Orthogonal Modulation |
| Keyword(4) | QUadrature-Quadrature Phase-Shift Keying |
| Keyword(5) | Nyquist Transmission |
| Keyword(6) | Hilbert Transform |
| Keyword(7) | Sigle Side Band |
| 1st Author's Name | Gen-ichiro Ohta |
| 1st Author's Affiliation | Corporate Engineering Division, Panasonic Mobile Communications Co., Ltd.() |
| 2nd Author's Name | Mitsuru Uesugi |
| 2nd Author's Affiliation | Corporate Engineering Division, Panasonic Mobile Communications Co., Ltd. |
| 3rd Author's Name | Takuro Sato |
| 3rd Author's Affiliation | Dept. of Information and Electronics Eng., Niigata Institute of Technology:Graduate School of Globa Information and Telecommunication Center, Waseda University |
| 4th Author's Name | Hideyoshi Tominaga |
| 4th Author's Affiliation | Graduate School of Global Information and Telecommunication Center, Waseda University |
| Date | 2003/11/13 |
| Paper # | A・P2003-178,RCS2003-184 |
| Volume (vol) | vol.103 |
| Number (no) | 459 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |