Results 11 to 20 of about 292,760 (265)

Investigation of pattern division multiple access technique in wireless communication networks

Indonesian Journal of Electrical Engineering and Computer Science, 2022
Recently, <span>pattern division multiple access (PDMA) is a non-orthogonal multiple access system that is now being developed in next-generation telecoms to address the requirement for mass connectivity. The core premise of non-orthogonal multiple access is to simultaneously serve multiple users with varying power levels across the same spectrum
Yonis, Aws Zuheer, Mohammed, Khalid Khalil   +1 more
openaire   +4 more sources

Uplink grant‐free pattern division multiple access transmission scheme by exploiting poly complementary sequence [PDF]

Transactions on Emerging Telecommunications Technologies, 2021
AbstractNon‐orthogonal multiple access (NOMA) technology is a key technology of the future cellular mobile communication system. It provides services for users under different channel conditions through signal superposition transmission and spectrum multiplexing.
Li, Shufeng, Su, Baoxin, Sun, Yao, Sun, Sanshan, Jin, Libiao   +4 more
openaire   +2 more sources

Investigating power scaling factor for pattern division multiple access

Indonesian Journal of Electrical Engineering and Computer Science
Pattern division multiple access (PDMA) is a one type of multi-domain non-orthogonal multiple access (NOMA) that support massive connectivity and can improve spectral efficiency. The unique pattern is used by each user to map its transmitting data into a group of resource, which consist of frequency, code and spatial domain or combination of these ...
Linda Meylani, Vinsensius Sigit Widhi Prabowo, Iswahyudi Hidayat, Nisa Alwiyah   +3 more
openaire   +4 more sources

Investigation on Evolving Single-Carrier NOMA Into Multi-Carrier NOMA in 5G [PDF]

IEEE Access, 2018
Non-orthogonal multiple access (NOMA) is one promising technology, which provides high system capacity, low latency, and massive connectivity, to address several challenges in the fifth-generation wireless systems. In this paper, we first reveal that the
Jie Zeng, Tiejun Lv, Ren Ping Liu, Xin Su, Mingyao Peng, Chang Wang, Jiajia Mei   +6 more
doaj   +2 more sources

Progressive Pattern Interleaver with Multi-Carrier Modulation Schemes and Iterative Multi-User Detection in IoT 6G Environments with Multipath Channels

Sensors
Sixth-generation (6G) wireless networks demand a more efficient implementation of non-orthogonal multiple access (NOMA) schemes for severe multipath fading environments to serve multiple users.
Shivani Dixit, Varun Shukla, Manoj Kumar Misra, Jose M. Jimenez, Jaime Lloret   +4 more
doaj   +2 more sources

A Wide Dynamics and Fast Scan Interrogating Method for a Fiber Bragg Grating Sensor Network Implemented Using Code Division Multiple Access

Sensors, 2012
We propose and demonstrate a fiber Bragg grating (FBG) sensor network employing the code division multiple access (CDMA) technique to identify information from individual sensors.
Chang-Soo Park, Youngbok Kim, Sie-Wook Jeon, Won-Bae Kwon   +3 more
doaj   +2 more sources

Same rate and pattern recognition search of orthogonal variable spreading factor code tree for wideband code division multiple access networks

IET Communications, 2014
Orthogonal variable spreading factor‐based code division multiple access systems allocate vacant codes when new call(s) arrive. This study proposes a same rate assignment scheme which allocates a new call to most favourable code in the region crowded by same rate calls. This does not add to blocked codes because of previous calls but utilise the unused
Vipin Balyan, Davinder S Saini
exaly   +2 more sources

Optimal Power Allocation for Cooperative Pattern Division Multiple Access Systems

Mathematical Problems in Engineering, 2021
This study focuses on the power allocation (PA) problem in code division multiple access (PDMA) networks with amplify-and-forward (AF) relays. We provide two wireless communication technical performance indexes, which are system throughput and outage probability.
Xiurong Zhang, Shaoli Kang, Xueqian Fu
openaire   +1 more source

Pattern division random access (PDRA) scheme for mMIMO systems

Dianxin kexue, 2022
To enhance the massive machine-type communications (mMTC) random access (RA) performance, a pattern division random access (PDRA) scheme was proposed for massive multiple-input multiple-output (mMIMO) systems.In this scheme, the pilot contention space ...
Xiaoming DAI, Lizhuo PANG, Zheng CHANG, Xinyue ZHANG, Yiran XING, Xiyuan WANG   +5 more
doaj   +2 more sources

New multiple access and waveform technology for 6G

Dianxin kexue, 2022
With the explosive growth of Internet devices, the 5G new radio (NR) system faces congestion and high latency issues due to the low access efficiency of traditional orthogonal multiple access (OMA).Besides this, the performance of the orthogonal ...
Hua LI, Shiya HAO, Caihong GONG, Qianqian LI, Xiaoming DAI   +4 more
doaj   +2 more sources