Smart City Gnosys
Smart city article details
| Title | Mimo-Noma With Mmwave Transmission |
|---|---|
| ID_Doc | 37047 |
| Authors | Khichar S.; Sasithong P.; Aung H.L.; Sharma A.; Chaudhary S.; Santipach W.; Wuttisittikulkij L. |
| Year | 2023 |
| Published | Applications of 5G and Beyond in Smart Cities |
| DOI | http://dx.doi.org/10.1201/9781003227861-10 |
| Abstract | For the next generation of wireless communication, Non Orthogonal Multiple Access (NOMA) is playing an important role. It is not only one of the most capable radio access techniques but also provides many aids like enhanced spectrum efficiency, reduced latency with high reliability, and massive connectivity. NOMA is a multiple access technique in which users can be served using the same sources; here sources refer to time, frequency, and space. NOMA is generally divided into two types: code domain (CD) and power domain (PD). Code domain NOMA provides different sequences to each user, known as the spreading sequence. The advantage of NOMA over other Multiple Access (MAs) is grant-free access. In the NOMA power domain, each user is allocated different power levels at the same time, frequency, and space, which is then multiplexed. PD is employed at the transmission side and performs superposition coding, power allocation, and user grouping to distinguish users. At the reception side, a joint detection algorithm, such as successive interference cancelation (SIC) or message-passing algorithm (MPA), is used. SIC is also used in multi-hop wireless rechargeable sensor networks and internet of things (IoT) networks for smart cities. NOMA with multiple-input multiple-output (MIMO) transmission in which base stations and mobile users are equipped with multiple antennas has been introduced to improve efficiency, energy, and spectrum efficiency. MIMO-NOMA provides a more directive beam with improved beam gain due to a large number of antennas. In the new-generation network setup, the spectrum in a millimeter-wave (mmWave) range will be utilized due to the availability of large bandwidth and the ability to deploy a large antenna array. The large array will reduce the effect of path loss and provide a highly directional beam. We will discuss the performance of NOMA and its role in smart city deployment. © 2023 selection and editorial matter, Ambar Bajpai and Arun Balodi; individual chapters, the contributors. |
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