On the Out of Band Emission Reduction for Orthogonal Frequency Division Multiplexing Based Systems

2019 ◽  
pp. 176-185
Author(s):  
Naima Sofi ◽  
Fatima Debbat ◽  
Fethi Tarek Bendimerad
Keyword(s):  
Emission Reduction ◽  
Orthogonal Frequency Division Multiplexing ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Band Emission

scholarly journals Comparing f-OFDM and OFDM Performance for MIMO Systems Considering a 5G Scenario

2019 ◽  
Author(s):  
Felipe Augusto Pereira de Figueiredo ◽  
Nathália F. T. Aniceto ◽  
Jorge Seki ◽  
Ingrid Moerman ◽  
Gustavo Fraidenraich
Keyword(s):  
Mobile Communications ◽  
Orthogonal Frequency Division Multiplexing ◽  
Error Probability ◽  
Mimo Systems ◽  
Radio Spectrum ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Primary Users ◽  
Band Emission ◽  
Spectral Localization

The advances mobile communications has seen in recent years has rendered the radio spectrum a limited and, hence, an expensive resource. Therefore, technologies that support unlicensed access to spectrum are needed. Therefore, the adoption of novel modulation schemes becomes of utmost importance to obtain better spectral-localization and reduce the OOBE (\textit{Out of Band Emission}) inherent to OFDM (\textit{Orthogonal Frequency Division Multiplexing}) and, consequently, mitigating the interference between secondary (\textit{unlicensed}) and primary users. In this scenario, we assess the gain in the bit error probability using f-OFDM (\textit{filtered-OFDM}) in MIMO systems, both used in the 5G RANGE project.

scholarly journals Comparing f-OFDM and OFDM Performance for MIMO Systems Considering a 5G Scenario

2019 ◽  
Author(s):  
Felipe Augusto Pereira de Figueiredo ◽  
Nathália F. T. Aniceto ◽  
Jorge Seki ◽  
Ingrid Moerman ◽  
Gustavo Fraidenraich
Keyword(s):  
Mobile Communications ◽  
Orthogonal Frequency Division Multiplexing ◽  
Error Probability ◽  
Mimo Systems ◽  
Radio Spectrum ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Primary Users ◽  
Band Emission ◽  
Spectral Localization

The advances mobile communications has seen in recent years has rendered the radio spectrum a limited and, hence, an expensive resource. Therefore, technologies that support unlicensed access to spectrum are needed. Therefore, the adoption of novel modulation schemes becomes of utmost importance to obtain better spectral-localization and reduce the OOBE (\textit{Out of Band Emission}) inherent to OFDM (\textit{Orthogonal Frequency Division Multiplexing}) and, consequently, mitigating the interference between secondary (\textit{unlicensed}) and primary users. In this scenario, we assess the gain in the bit error probability using f-OFDM (\textit{filtered-OFDM}) in MIMO systems, both used in the 5G RANGE project.

Non-linear companding scheme for peak-to-average power ratio (PAPR) reduction in generalized frequency division multiplexing

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Shiv Om Tiwari ◽  
Rajeev Paulus
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Average Power ◽  
Frequency Division Multiplexing ◽  
Power Ratio ◽  
Frequency Division ◽  
Mobile Phone Technology ◽  
Time Frequency ◽  
Band Emission ◽  
Non Linear ◽  
Papr Performance

AbstractDue to the evolution of mobile phone technology which enables the use of Internet, the demand for data rates has increased tremendously. Therefore, current 4G-LTE (long-term evolution) technology needs to be replaced in near future. Hence, currently possible solutions for 5G technology are heavily investigated. Generalized frequency division multiplexing (GFDM) is one such technique which is based on multi-carrier filters and uses time-frequency structure to optimize delay and out-of-band emission (OOB). Still GFDM is very much similar to orthogonal frequency division multiplexing (OFDM) with much improved spectral and peak-to-average power ratio (PAPR) performance. This paper presents a detailed description of GFDM technique, along-with its comparison to OFDM method. This paper further investigates the non-linear companding scheme which can be used to further reduce PAPR. Simulation results are presented to obtain (Power Spectral Density) PSD and PAPR performance.

scholarly journals Filtered-Orthogonal Frequency Division Multiplexing Technique for 5th Generation Mobile Communication

2019 ◽  
Vol 8 (12) ◽  
pp. 3763-3767
Keyword(s):  
Mobile Communication ◽  
Orthogonal Frequency Division Multiplexing ◽  
Low Latency ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Band Emission ◽  
Verbal Exchange ◽  
Overall Performance ◽  
5G Systems ◽  
Modulation Schemes

The imminent 5G cellular verbal exchange machine is expected to own excessive facts fees, low latency and support a massive range of devices. Except for this, gadget type communiqué is anticipated to be treated by way of 5G gadget in a very better and within your means approach. For this reason, forms of waveform applicants are projected. F-OFDM is a few of the projected applicants for 5G systems that extremely resembles to its precursor it's OFDM. The important difference among the two multi carrier waveforms is that the use of a well-designed clear out. F-OFDM as compared with OFDM so provides reduced out of band emission that allows it to utilize the allocated spectrum expeditiously. This analysis paper presents F-OFDM overall performance with absolutely different modulation schemes like QPSK, 16QAM, 64QAM and 256QAM techniques using MATLAB.

scholarly journals Filtered orthogonal frequency division multiplexing for improved 5G systems

2021 ◽  
Vol 10 (4) ◽  
pp. 2079-2087
Author(s):  
Ammar A. Sahrab ◽  
Alaa Doohee Yaseen
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Human Life ◽  
Sinc Function ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Error Vector Magnitude ◽  
Band Emission ◽  
Fifth Generation ◽  
Power Spectral ◽  
High Spectral Efficiency

Wireless communications became an integrated part of the human life. Fifth generation (5G) is the modern communication which provides enhanced mobile broadband (eMBB), ultra reliable low latency communications (URLLC), and massive machine type communication (mMTC). Thus, 5G have to provide coverage to multi-numerology devices, therefore, modulation and access schemes are suggested in the literature such as cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) and filtered OFDM (f-OFDM). CP-OFDM suffers from the high out of band emission which limited the multi-numerology applications. In f-OFDM, the out of band emission can be suppressed to an accepted extent such that different numerologies can be coexisting. On the other hand, f-OFDM can be more improved by using a proper filtering approach. In this paper three different filters are suggested based windowed-sinc function; Hanning, Hamming, and Blackman. Simulation results show that the proposed filters are promising for high spectral efficiency and out of band emission rejection. Furthermore, the bit error rate, error vector magnitude, and power spectral density are further improved with respect to CP-OFDM scheme but some trade-off is present. Overall, the suggested windowed-sinc filters are outperforming the traditional CP-OFDM. As a conclusion, the suggested windnowed-sinc filters have no limitations on the modulation order or the number of subcarriers utilized in the system.

Sign in / Sign up

Export Citation Format

Share Document