Probability distribution analysis of M-QAM-modulated OFDM symbol and reconstruction of distorted data

Yoo, Hyunseuk; Guilloud, Frédéric; Pyndiah, Ramesh

doi:10.1186/1687-6180-2011-135

Cited by 9 publications

(3 citation statements)

References 13 publications

(15 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fig. 7 a shows that the original OFDM signal without PAPR reduction is Gaussian distributed [22], which denotes a large amplitude variations [23]. However, after applying HTR and TRNS methods, the amplitude distribution has slightly changed because of the PCS as shown in Fig.…”

Section: Simulation Results Based On Ieee 80211a Physical Layermentioning

confidence: 99%

Using guard interval signal to improve tone reservation method for peak‐to‐average power ratio reduction in orthogonal frequency division multiplexing systems

Sohtsinda

Bachir

Perrine

et al. 2015

IET signal process.

View full text Add to dashboard Cite

International audienceAlthough orthogonal frequency division multiplexing is adopted by many standards in wireless communication systems, it generates high peak fluctuations which are affected by radio frequency circuit non-linearities, reducing the power efficiency and the network quality of service. In recent years, tone-reservation using null subcarriers (TRNS) scheme has been proposed to reduce the level of these fluctuations, measured by the peak-to-average power ratio (PAPR). However, TRNS performances only depend on the available number of null subcarriers in the current standards. In this study, a new scheme to improve TRNS performances by including the samples of the guard interval signal within the parameters of the optimisation algorithm is proposed, allowing higher PAPR reduction gain and requiring no side information. Simulations under the wireless local area network IEEE 802.11a standard show that the new method does not violate the specified spectrum mask and achieves a higher PAPR reduction gain compared to TRNS method. Also, the evaluation of bit error rate and error vector magnitude under additive white Gaussian noise and Rayleigh fading channels shows a comparable level of the quality of communication between the two schemes

show abstract

Section: Simulation Results Based On Ieee 80211a Physical Layermentioning

confidence: 99%

Using guard interval signal to improve tone reservation method for peak‐to‐average power ratio reduction in orthogonal frequency division multiplexing systems

Sohtsinda

Bachir

Perrine

et al. 2015

IET signal process.

View full text Add to dashboard Cite

show abstract

“…Similar to previous tools, starting with the steady-state circumstances at the start of the transitions, it is possible to determine the principal waveform and the losses. A purposefully clipped OFDM signal or an OFDM signal that operates in an amplifier's saturation region were both taken into account by [19]. Be aware that depending on the saturation level, these types of warped OFDM signals produce an error floor.…”

Section: Power and Efficiency Of Et Pa Using Matlab Asmentioning

confidence: 99%

PVT Analysis and Behavioral Modeling of Doherty and Envelope Tracking RF ULP Power Amplifiers using 65 nm CMOS Technology

Akhter,

M. Amin,

Rashid Masud

2024

SSURJET

View full text Add to dashboard Cite

This research encompasses both Process-Voltage-Temperature (PVT) considerations and behavioral modeling of two proposed Power Amplifier (PA) designs for wireless communication systems. Process variations, supply voltage changes, and temperature changes provide difficulties for the design and optimization of power amplifiers for wireless communication systems and may have a substantial influence on their effectiveness. PVT analysis and behavioral modeling have been conducted to address the aforementioned challenges and characterize the behavior and performance of the power amplifiers under real-world operating conditions. It investigates the impact of process variations, supply voltage variations, and temperature variations on the performance of the PAs. The insights gained from this analysis contribute to a deeper understanding of the power amplifiers' performance, efficiency, and suitability for specific wireless communication standards, laying the foundation for future advancements in RF power amplifier design. The first design focuses on a Doherty PA (DPA) tailored for low-power short-range applications complying with the IEEE Wireless Personal Area Network (WPAN) standard. The second design explores an Envelope Tracking (ET) supply bias control for low-power long-range applications conforming to the IEEE Wireless Local Area Network (WLAN) standard. By examining these factors, the research ensures that the PAs exhibit reliable and optimal performance under real-world operating conditions. The PVT corners show a change in gain of only 0.4 dB for DPA and 0.9 dB for ET PA. Furthermore, behavioral modeling is employed to characterize the power efficiency of the envelope tracking PA, along with the current efficiency and quotient current on the load current scale. These models provide valuable insights into the behavior and performance of the PAs at a higher level of abstraction. The results and findings contribute to a deeper understanding of the PA’s performance, efficiency, and suitability for specific wireless communication standards, laying the foundation for future advancements in RF power amplifier design.

show abstract

“…QAM modulation has been widely employed in many wire/wireless standards, such as LTE, WiFi [5]. It is well known that the inter-cell interference (ICI) in conventional cellular networks employing orthogonal frequency division multiple-access (OFDMA) with QAM tends to approach a Gaussian distribution [6]. In [7], FQAM was proposed for a downlink cellular OFDMA network to replace conventional QAM and it has demonstrated a significant performance gain for the interference intensive scenario, where the gain is attributed to the fact that the distribution of the ICI plus additive noise (hereafter denoted as ICI for simplicity) received by the user deviates from Gaussian distribution [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Interference management via space and frequency domain resource partitioning

Gutierrez-Estevez

Shariat

et al. 2017

2017 International Symposium on Wireless Communication Systems (ISWCS)

View full text Add to dashboard Cite

One key requirement for the fifth-Generation (5G) mobile system is the enhancement of cell edge user performance to ensure that every user is supported with consistent experience anywhere in the network. An active interference design to improve anywhere performance, particularly in the low SINR regime, can be achieved by applying a recently proposed new type of modulation scheme, frequency quadrature-amplitude modulation (FQAM), which could change the distribution of interference and therefore improve channel capacity. In this paper, a resource partitioning scheme to support FQAM in interference intensive scenarios is proposed. The proposed scheme slices radio resources into orthogonal parts for QAM and FQAM, respectively, along two different resource dimensions, namely, space and frequency. This can be achieved by incorporating advanced beamforming algorithms, e.g., fulldimension (FD-MIMO), and performing a frequency-based split of FQAM resources to effectively improve the data rate of the edge users experiencing heavy interference. Two resource partitioning mechanisms are proposed followed by complexity analysis. Evaluation results on both space and frequency-based FQAM interference management are presented, showing significant performance improvements when compared to the regular QAM modulation.

show abstract

Probability distribution analysis of M-QAM-modulated OFDM symbol and reconstruction of distorted data

Cited by 9 publications

References 13 publications

Using guard interval signal to improve tone reservation method for peak‐to‐average power ratio reduction in orthogonal frequency division multiplexing systems

Using guard interval signal to improve tone reservation method for peak‐to‐average power ratio reduction in orthogonal frequency division multiplexing systems

PVT Analysis and Behavioral Modeling of Doherty and Envelope Tracking RF ULP Power Amplifiers using 65 nm CMOS Technology

Interference management via space and frequency domain resource partitioning

Contact Info

Product

Resources

About