| Presentation | 2022-08-26 Constant Amplitude Modulation for NOMA-OFDM Wireless Communications Wang Zihan, Yuyuan Chang, Kazuhiko Fukawa, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In wireless communications, non-orthogonal multiple access (NOMA), which combines and transmit multiple user signals, can improve the spectral efficiency drastically. Applying NOMA to orthogonal frequency-division multiplexing (OFDM) yields NOMA-OFDM, which suffers from higher peak-to-average power ratio (PAPR) than that of OFDM owing to the multiplexing. To minimize such PAPR, this report proposes to apply a constant amplitude scheme to NOMA-OFDM. Specifically, one NOMA-OFDM signal is decomposed into two constant amplitude signals, which are transmitted at different timing. Since the decomposition induces out-of-band emission (OOBE), the resultant signal should be passed into a low-pass filter (LPF). On the receiver side, received signals corresponding to the two constant amplitude signals are retrieved and combined to recover the original NOMA-OFDM signal. In the same manner as the conventional NOMA-OFDM, successive interference cancellation (SIC) can be employed for signal detection. Computer simulations demonstrate that the proposed scheme can achieve lower PAPR than the conventional NOMA-OFDM and thus can alleviate signal distortion caused by a non-linear power amplifier following LPF much more than NOMA-OFDM, which results in improving the bit error rate (BER) performance. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Non-orthogonal multiple access (NOMA) / orthogonal frequency-division multiplexing (OFDM) / peak-to-average power ratio / non-linear power amplifier / low-pass filter / out-of-band emission |
| Paper # | RCS2022-115 |
| Date of Issue | 2022-08-18 (RCS) |
| Conference Information | |
| Committee | SAT / RCS |
|---|---|
| Conference Date | 2022/8/25(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Tetsushi Ikegami(Meiji Univ.) / Kenichi Higuchi(Tokyo Univ. of Science) |
| Vice Chair | Masashi Kamei(NHK) / Takana Kaho(Shonan Inst. of Tech.) / Tomoya Tandai(Toshiba) / Fumihide Kojima(NICT) / Osamu Muta(Kyushu Univ.) |
| Secretary | Masashi Kamei(NTT) / Takana Kaho(NICT) / Tomoya Tandai(Panasonic) / Fumihide Kojima(Univ. of Electro-Comm) / Osamu Muta(Sharp) |
| Assistant | Riichiro Nagareda(KDDI Research) / Yuuki Koizumi(NHK) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Issei Kanno(KDDI Research) / Yuyuan Chang(Tokyo Inst. of Tech) |
| Paper Information | |
| Registration To | Technical Committee on Satellite Telecommunications / Technical Committee on Radio Communication Systems |
|---|---|
| Language | ENG-JTITLE |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Constant Amplitude Modulation for NOMA-OFDM Wireless Communications |
| Sub Title (in English) | |
| Keyword(1) | Non-orthogonal multiple access (NOMA) |
| Keyword(2) | orthogonal frequency-division multiplexing (OFDM) |
| Keyword(3) | peak-to-average power ratio |
| Keyword(4) | non-linear power amplifier |
| Keyword(5) | low-pass filter |
| Keyword(6) | out-of-band emission |
| 1st Author's Name | Wang Zihan |
| 1st Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| 2nd Author's Name | Yuyuan Chang |
| 2nd Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| 3rd Author's Name | Kazuhiko Fukawa |
| 3rd Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| Date | 2022-08-26 |
| Paper # | RCS2022-115 |
| Volume (vol) | vol.122 |
| Number (no) | RCS-164 |
| Page | pp.pp.102-107(RCS), |
| #Pages | 6 |
| Date of Issue | 2022-08-18 (RCS) |