scholarly journals Peak-To-Average Power Reduction In Mimo-Ofdm Systems Using Sub-Optimal Algorithm

2012 ◽  
Vol 3 (3) ◽  
pp. 261-273 ◽  
Author(s):  
K Srinivasarao
Keyword(s):  
Optimal Algorithm ◽  
Average Power ◽  
Power Reduction ◽  
Ofdm Systems ◽  
Mimo Ofdm

Factors Influencing the PAPR Performance of OFDM and MIMO-OFDM Systems

2019 ◽  
Vol 11 (3) ◽  
pp. 23-33 ◽  
Author(s):  
Tahreer Mahmood ◽  
Seshadri Mohan
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Multiple Input Multiple Output ◽  
Average Power ◽  
Channel Fading ◽  
Ofdm Systems ◽  
Practical Applications ◽  
Factors Influencing ◽  
Mimo Ofdm ◽  
Modulation Schemes ◽  
Papr Performance

Multiple-input multiple-output technology together with orthogonal frequency division multiplexing (MIMO-OFDM) is an effective technique to combat multi-channel fading and to improve bandwidth efficiency. Simultaneously, it also increases the system's ability to provide reliable transmission. However, the main disadvantage of OFDM is the high peak-to-average-power ratio (PAPR), which, if not mitigated, will negatively impact practical applications. The high PAPR increases complexity and Bit Error Rate. In this research, the authors investigate the factors influencing the PAPR performance of both OFDM and MIMO-OFDM systems. The objective of this research is to make researchers in this field become familiar with this problem as well as to impart an understanding of the factors that influence PAPR. In this study, the authors classify the factors that impact PAPR into modulation schemes and a number of sub-carriers. These parameters influence the PAPR performance have been analyzed and simulated by using MATLAB. It is observed that the numbers of sub-carriers have a great effect on the PAPR performance. However, modulation schemes can have a small effect on PAPR performance.

scholarly journals Energy-Efficiency Analysis of Per-Subcarrier Antenna Selection with Peak-Power Reduction in MIMO-OFDM Wireless Systems

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Ngoc Phuc Le ◽  
Le Chung Tran ◽  
Farzad Safaei
Keyword(s):  
Energy Efficiency ◽  
Power Efficiency ◽  
Peak Power ◽  
Antenna Selection ◽  
Average Power ◽  
Wireless Systems ◽  
Power Reduction ◽  
Cumulative Distribution ◽  
Peak Power Reduction ◽  
Mimo Ofdm

The use of per-subcarrier antenna subset selection in OFDM wireless systems offers higher system capacity and/or improved link reliability. However, the implementation of the conventional per-subcarrier selection scheme may result in significant fluctuations of the average power and peak power across antennas, which affects the potential benefits of the system. In this paper, power efficiency of high-power amplifiers and energy efficiency in per-subcarrier antenna selection MIMO-OFDM systems are investigated. To deliver the maximum overall power efficiency, we propose a two-step strategy for data-subcarrier allocation. This strategy consists of an equal allocation of data subcarriers based on linear optimization and peak-power reduction via cross-antenna permutations. For analysis, we derive the CCDF (complementary cumulative distribution function) of the power efficiency as well as the analytical expressions of the average power efficiency. It is proved from the power-efficiency perspective that the proposed allocation scheme outperforms the conventional scheme. We also show that the improvement in the power efficiency translates into an improved capacity and, in turn, increases energy efficiency of the proposed system. Simulation results are provided to validate our analyses.

Peak-to-average power ratio in MIMO-OFDM systems using selective mapping

2003 ◽  
Vol 7 (12) ◽  
pp. 575-577 ◽  
Author(s):  
Yung-Lyul Lee ◽  
Young-Hwan You ◽  
Won-Gi Jeon ◽  
Jong-Ho Paik ◽  
Hyoung-Kyu Song
Keyword(s):  
Average Power ◽  
Power Ratio ◽  
Ofdm Systems ◽  
Mimo Ofdm ◽  
Selective Mapping

scholarly journals A New Proposed Peak-to-Average Power Reduction Parameter to Evaluate SLM and PTS as MIMO-OFDM PAPR Reduction Schemes

2019 ◽  
Vol 8 (11S) ◽  
pp. 835-839
Keyword(s):  
Average Power ◽  
Power Reduction ◽  
Papr Reduction ◽  
Average Ability ◽  
Mimo Ofdm

All around, the top to-average ability amount (PAPR) of transmitted signs for MIMO-OFDM structures diminishes the arrangement accumulation and from this time advanced turns into the amount of the radio change (RF) ascendancy intensifier. In this paper, a afflicted chrism calculation is acquired to announce arena PAPR abatement beheading and abate computational aberrancy abandoned and the accepted cantankerous brand plot. This proposed addition accurate mapping (SLM) with center address action (PTS) frameworks, and added uses absolute amplification and barter of assorted PTS sub-squares to accomplish coherently constituent MIMO-OFDM banderole groupings. Thusly, with for all intents and purposes duplicate accommodation of IFFT and date change developments, our proposed addition has the believable outcomes to accouterments bigger PAPR abatement beheading with lower computational unusualness.

A New Algorithm for Peak/Average Power Reduction in OFDM Systems

2008 ◽  
Vol 54 (1) ◽  
pp. 159-165 ◽  
Author(s):  
F. Kohandani ◽  
A.K. Khandani
Keyword(s):  
Average Power ◽  
Power Reduction ◽  
Ofdm Systems
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