CSIT-Free Downlink Transmission for mmWave MU-MISO Systems in High-Mobility Scenario
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866909797499011072 |
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| author | Lee, Jeongjae Choi, Wonseok Hong, Songnam |
| author_facet | Lee, Jeongjae Choi, Wonseok Hong, Songnam |
| contents | This paper investigates the downlink (DL) transmission in millimeter-wave (mmWave) multi-user multiple-input single-output (MU-MISO) systems especially focusing on a high speed mobile scenario. To complete the DL transmission within an extremely short channel coherence time, we propose a novel DL transmission framework that eliminates the need for channel state information at the transmitter (CSIT), of which acquisition process requires a substantial overhead, instead fully exploiting the given channel coherence time. Harnessing the characteristic of mmWave channel and uniquely designed CSIT-free unitary precoding, we propose a symbol detection method along with the simultaneous CSI at the receiver (CSIR) and Doppler shift estimation method to completely cancel the interferences while achieving a full combining gain. Via simulations, we demonstrate the effectiveness of the proposed method comparing with the existing baselines. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_15564 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | CSIT-Free Downlink Transmission for mmWave MU-MISO Systems in High-Mobility Scenario Lee, Jeongjae Choi, Wonseok Hong, Songnam Signal Processing This paper investigates the downlink (DL) transmission in millimeter-wave (mmWave) multi-user multiple-input single-output (MU-MISO) systems especially focusing on a high speed mobile scenario. To complete the DL transmission within an extremely short channel coherence time, we propose a novel DL transmission framework that eliminates the need for channel state information at the transmitter (CSIT), of which acquisition process requires a substantial overhead, instead fully exploiting the given channel coherence time. Harnessing the characteristic of mmWave channel and uniquely designed CSIT-free unitary precoding, we propose a symbol detection method along with the simultaneous CSI at the receiver (CSIR) and Doppler shift estimation method to completely cancel the interferences while achieving a full combining gain. Via simulations, we demonstrate the effectiveness of the proposed method comparing with the existing baselines. |
| title | CSIT-Free Downlink Transmission for mmWave MU-MISO Systems in High-Mobility Scenario |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2509.15564 |