scholarly journals Iterative multiuser detection for high spectral efficiency reverse-link of multibeam satellite via expectation propagation

2016 ◽  
Vol 1 (3) ◽  
pp. 32-41 ◽  
Author(s):  
Xincong Lin ◽  
Sheng Wu ◽  
Zuyao Ni ◽  
Linling Kuang ◽  
Defeng Huang ◽  
...  
Keyword(s):  
Multiuser Detection ◽  
Spectral Efficiency ◽  
Expectation Propagation ◽  
Reverse Link ◽  
High Spectral Efficiency ◽  
Iterative Multiuser Detection

scholarly journals Uplink Transmit Power Control for Single-Carrier Grouped FDMA with Iterative Multiuser Detection

2019 ◽  
Vol 10 (1) ◽  
pp. 119
Author(s):  
Yong-Sang Cho ◽  
Yun-Seong Kang ◽  
Moonsik Min
Keyword(s):  
Power Control ◽  
Multiuser Detection ◽  
Spectral Efficiency ◽  
Control Method ◽  
Signal To Noise Ratio ◽  
Transmit Power ◽  
Time Frequency ◽  
Evolution Simulation ◽  
Single Carrier ◽  
Iterative Multiuser Detection

We consider an uplink power allocation scheme for single-carrier frequency-division multiple access (FDMA) with iterative multiuser detection, called single-carrier grouped FDMA (SC-GFDMA). SC-GFDMA is a non-orthogonal scheme in which several users share a single time-frequency resource. Hence, the uplink signal of a user can be regarded as both a signal and a source of interference. The signal power of each user should be sufficiently high to ensure reliable signal detection and sufficiently low to suppress inter-user interference. That is, the transmit power of each user should be adjusted appropriately to achieve high spectral efficiency. In this context, a power control method for an uplink SC-GFDMA system is proposed by analyzing the signal-to-interference-plus-noise ratios of users sharing each time-frequency resource. In particular, the uplink spectral efficiency is improved by limiting the transmit power of each user according to a criterion derived using a semi-analytic method called signal-to-noise ratio-variance density evolution. Simulation results demonstrate that the proposed method can significantly increase the spectral efficiency of the system, even with a considerably reduced total transmit power.

SC-FDMA with iterative multiuser detection: improvements on power/spectral efficiency

2010 ◽  
Vol 48 (3) ◽  
pp. 164-171 ◽  
Author(s):  
Tae-Won Yune ◽  
Chan-Ho Choi ◽  
Gi-Hong Im ◽  
Jong-Bu Lim ◽  
Eung-Sun Kim ◽  
...  
Keyword(s):  
Multiuser Detection ◽  
Spectral Efficiency ◽  
Power Spectral ◽  
Iterative Multiuser Detection
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