DE202022101358U1 - A non-orthogonal filter bank multicarrier system for 5G communications - Google Patents

Abstract

A non-orthogonal filter bank multicarrier system (FBMC) for 5G communications, the system being characterized by :
a signal generation module for generating an FBMC signal, the module being connected to a multi-carrier polyphase network filter bank (PPN-FBMC) in which each FBMC signal is filtered prior to transmission to remove inter-carrier interference (ICI) and eliminate inter-symbol interference (ISI);
a vector signal generator (VSG) module for transmitting the FBMC signal as a transmitter, the FBMC transmitter including a modulator and a mapper for modulating and mapping the FBMC signal to generate a transmission bit prior to transmission through a channel;
a vector signal analyzer (VSA) module for receiving the FBMC signal as a receiver, the FBMC receiver including a demodulator and a demapper for demodulating and demapping the FBMC signal to generate a received bit;
a receiver-side Bit Error Rate (BER) analysis module including a processing unit for calculating the BER for a given signal-to-noise ratio (SNR); and
a receiver-side mounted power meter comprising a power sensor for measuring the peak to average power ratio (PAPR).

Description

FIELD OF THE INVENTION

The present invention relates to a non-orthogonal filter bank multicarrier system for 5G communication.

BACKGROUND OF THE INVENTION

Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier technology that is widely used in current communication systems, such as 4G cellular networks. Conventional OFDM methods use Inverse Fast Fourier Transform (IFFT) in the transmit part and Fast Fourier Transform (FFT) in the receive part to protect against multipath fading. Filter Bank Multi-Carrier is an evolution of OFDM that eliminates Intersymbol Interference (ISI) and Intercarrier Interference (ICI) by independently filtering each carrier before transmission. There are two types of FBMC implementations: Poly-Phase Network Filterbank Multi-Carrier (PPN-FBMC) and Frequency Spread Filterbank Multi-Carrier (FS-FBMC) (FS-FBMC). In this paper, the PPN-FBMC model is used, which reduces complexity through additional filter operations on both the sender and receiver side. In this paper FBMC system with the prototype filter is proposed to develop a new physical layer for futuristic and efficient cellular networks with high data rates and variable spectrum requirements. To increase the peak factor, the prototype filter with overlap/spreading factors K=4, 6 and 8 is used in the simulation together with offset quadrature amplitude modulation (OQAM).

In view of the previous discussion, it becomes clear that a non-orthogonal filter bank multi-carrier system (FBMC) is required for 5g communication.

SUMMARY OF THE INVENTION

The present disclosure aims to provide a non-orthogonal filter bank multicarrier system (FBMC) for 5G communication. In particular, the present invention relates to an FBMC-based SG communication system with proto-type filters of higher order spreading factors. The system examines the performance of an FBMC-based 5G communication system with spreading factors 4, 6 and 8 in terms of spectral efficiency, out-of-band Emissions, peak-to-average power ratio (PAPR) and bit error rate (BER) under additive white Gaussian noise (AWGN) and outdoor fading conditions such as B. in the country (RLOS), on the highway (HLOS) and in the vicinity of the city (UALOS).

In one embodiment, a non-orthogonal filter bank multi-carrier system (FBMC) for 5G communication comprises a signal generation module for generating an FBMC signal, the module being connected to a multi-phase network filter bank multi-carrier system (PPN-FBMC) in which each FBMC signal is filtered prior to transmission to eliminate inter-carrier interference (ICI) and inter-symbol interference (ISI). The system further includes a vector signal generator (VSG) module for transmitting the FBMC signal as a transmitter, wherein the FBMC transmitter includes a modulator and a mapper for modulating and mapping the FBMC signal to generate a transmission bit prior to transmission through a channel.The system further includes a vector signal analyzer (VSA) module for receiving the FBMC signal as a receiver, wherein the FBMC receiver includes a demodulator and a demapper for demodulating and demapping the FBMC signal to generate a received bit. The system further comprises a bit error rate (BER) analysis module mounted at the receiver side and containing a processing unit for calculating the BER for a given signal-to-noise ratio (SNR). Finally, the system includes a power meter mounted on the receiver side containing a power sensor for measuring the peak to average power ratio (PAPR).

In one embodiment, the bandwidth efficiency of the FBMC system is 100% at higher order overlap factors, i.e. K=6 and K=8.

In one embodiment, the out-of-band (OOB) emissions in this FBMC system are minimal, resulting in a lower adjacent channel leakage ratio (ACLR).

In one embodiment, the peak power to average power ratio (PAPR) with factors K=6 and K=8 is slightly better than with factor K=4 in the FBMC system.

In one embodiment, the BER is analyzed under AWGN and line-of-sight fading conditions, which is very important for vehicle communications, where the FBMC systems perform better with higher modulation schemes such as 64-QAM.

In one embodiment, the PAPR of the FBMC system with SF=6 is slightly better than SF=4 and SF=8, making the FBMC system better PAPR values when the QAM order is higher.

In order to further clarify the advantages and features of the present disclosure, a more detailed description of the invention is provided by reference to specific embodiments thereof that are illustrated in the accompanying figures. It is understood that these figures represent only typical embodiments of the invention and therefore should not be considered as limiting its scope. The invention will be described and explained with additional specificity and detail with the accompanying figures.

character list

• 1 ein Blockdiagramm eines nicht-orthogonalen Filterbank-Multiträgersystems (FBMC) für 5g-Kommunikation gemäß einer Ausführungsform der vorliegenden Offenbarung zeigt;
• 2 eine PPN-FFT-Implementierung der Senderfilterbank gemäß einer Ausführungsform der vorliegenden Offenbarung zeigt;
• 3 einen PPN-Abschnitt im Sender (K = 6) in Übereinstimmung mit einer Ausführungsform der vorliegenden Offenbarung zeigt;
• 4 einen PPN-Abschnitt im Sender (K = 8) gemäß einer Ausführungsform der vorliegenden Offenbarung zeigt;
• 5(a) und 5(b) eine FBMC- und OFDM-PSD-Analyse ohne und mit AWGN-Kanal in Übereinstimmung mit einer Ausführungsform der vorliegenden Offenbarung zeigen;
• 6 eine komplementäre kumulative Verteilungsfunktion (CCDF) des FBMC-Systems mit variablen Überlappungsfaktoren und des OFDM-Systems in Übereinstimmung mit einer Ausführungsform der vorliegenden Offenbarung zeigt;
• 7(a) und 7(b) eine BER-Analyse von FBMC- und OFDM-Systemen unter AWGN-Bedingungen in Übereinstimmung mit einer Ausführungsform der vorliegenden Offenbarung zeigen;
• 8(a) und 8(b) die BER-Analyse unter verschiedenen Fading-Bedingungen in Übereinstimmung mit einer Ausführungsform der vorliegenden Offenbarung zeigen;
• 9 die BER-Analyse von FBMC- und OFDM-Systemen mit QPSK, 16QAM und 64QAM in Übereinstimmung mit einer Ausführungsform der vorliegenden Offenbarung zeigt; und
• 10 in Tabelle 1 einen PAPR-Vergleich für FBMC- und OFDM-Systeme in Übereinstimmung mit einer Ausführungsform der vorliegenden Offenbarung zeigt.

These and other features, aspects, and advantages of the present disclosure will be better understood when the following detailed description is read with reference to the accompanying figures, in which like characters represent like parts throughout the figures, wherein:

• 1 Figure 12 shows a block diagram of a non-orthogonal filter bank multicarrier system (FBMC) for 5g communication according to an embodiment of the present disclosure;
• 2 Figure 12 shows a PPN FFT implementation of the transmitter filter bank according to an embodiment of the present disclosure;
• 3 Figure 12 shows a PPN section in the transmitter (K=6) in accordance with an embodiment of the present disclosure;
• 4 12 shows a PPN section in the transmitter (K=8) according to an embodiment of the present disclosure;
• 5(a) and 5(b) Figure 12 shows FBMC and OFDM PSD analysis without and with AWGN channel, in accordance with an embodiment of the present disclosure;
• 6 13 shows a complementary cumulative distribution function (CCDF) of the FBMC system with variable overlap factors and the OFDM system, in accordance with an embodiment of the present disclosure;
• 7(a) and 7(b) show a BER analysis of FBMC and OFDM systems under AWGN conditions in accordance with an embodiment of the present disclosure;
• 8(a) and 8(b) show the BER analysis under different fading conditions in accordance with an embodiment of the present disclosure;
• 9 Figure 1 shows BER analysis of FBMC and OFDM systems with QPSK, 16QAM and 64QAM in accordance with an embodiment of the present disclosure; and
• 10 in Table 1 shows a PAPR comparison for FBMC and OFDM systems in accordance with an embodiment of the present disclosure.

Those skilled in the art will understand that the elements in the figures are presented for simplicity and are not necessarily drawn to scale. Furthermore, one or more components of the device may be represented in the figures by conventional symbols and the figures show only the specific details relevant to an understanding of the embodiments of the present disclosure, in order not to obscure the figures with details obscure easily recognizable to those of ordinary skill in the art benefiting from the present description.

DETAILED DESCRIPTION

For a better understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the figures and described in specific language. It should be understood, however, that no limitation on the scope of the invention is intended, and such alterations and further modifications to the illustrated system and such further applications of the principles of the invention set forth therein are contemplated as would occur to those skilled in the art invention would normally come to mind.

It will be understood by those skilled in the art that the foregoing general description and the following detailed description are exemplary and explanatory of the invention and are not intended to be limiting.

When this specification refers to "an aspect," "another aspect," or the like, it means that a particular feature, structure, or characteristic described in connection with the embodiment is present in at least one embodiment included in the present disclosure. Therefore, the phrases "in one embodiment," "in another embodiment," and similar phrases throughout this specification may or may not all refer to the same embodiment.

The terms "comprising,""consistingof," or other variations thereof are not intended to exclude cover eventual inclusion. Likewise, one or more devices or subsystems or elements or structures or components preceded by "includes...a" excludes, without further limitation, the existence of other devices or other subsystems or other elements or other structures or other components or additional devices or additional subsystems or additional elements or additional structures or additional components.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The system, methods, and examples provided herein are for purposes of illustration only and are not intended to be limiting.

Embodiments of the present disclosure are described in detail below with reference to the attached figures.

1 12 shows a block diagram of a non-orthogonal filter bank multicarrier system (FBMC) for 5g communication according to an embodiment of the present disclosure. The system 100 includes a signal generation module 102 for generating an FBMC signal, the signal generation module 102 being connected to a multi-carrier polyphase network filterbank (PPN-FBMC) in which each FBMC signal is filtered prior to transmission to remove intercarriers - Eliminate Interference (ICI) and Inter-Symbol Interference (ISI).

In one embodiment, a vector signal generator (VSG) module 104 for transmitting the FBMC signal as a transmitter, the FBMC transmitter including a modulator and a mapper for modulating and mapping the FBMC signal to generate a transmission bit prior to transmission through a channel.

In one embodiment, a vector signal analyzer (VSA) module 106 for receiving the FBMC signal as a receiver, the FBMC receiver including a demodulator and a demapper for demodulating and demapping the FBMC signal to generate a received bit.

In one embodiment, a receiver-side Bit Error Rate (BER) analysis module 108 includes a processing unit for calculating the BER for a given signal-to-noise ratio (SNR).

In one embodiment, a power meter 110 mounted on the receiver side includes a power sensor 112 for measuring the peak to average power ratio (PAPR).

There are two types of FBMC implementations, namely Polyphase Network Filterbank Multicarrier (PPN-FBMC) and Spread Spectrum Filterbank Multicarrier (FS-FBMC). In this alleged invention, PPN-FBMC model is used, which reduces the complexity through additional filter operations on both sides of the transmitter and receiver, the FBMC system with prototype filter is proposed to create a new physical layer for the futuristic and efficient mobile networks with the requirements of high data rates and flexible spectrum. The prototype filter with overlap/spread factor K=4, 6 and 8 is used for simulation together with OQAM to improve crest factor.

The present invention shows the verification of FBMC and OFDM implementation, which includes FBMC and OFDM signal generation module for generating FBMC and OFDM signals, then VSG module transmits FBMC/OFDM signal and Vector Signal Analyzer (VSA ) module receives the signal as a receiver and processes it with a processing unit to calculate the BER for a given SNR. Then to measure the PAPRVSA module it disconnects and connects a power meter along with a power sensor. This process is repeated for different SNR values to obtain the BER performance for different SNR values.

In one embodiment, the bandwidth efficiency of the FBMC system is 100% at higher order overlap factors, i.e. K=6 and K=8.

In one embodiment, the out-of-band (OOB) emissions in this FBMC system are minimal, resulting in a lower adjacent channel leakage ratio (ACLR).

In one embodiment, the peak power to average power ratio (PAPR) with factors K=6 and K=8 is slightly better than with factor K=4 in the FBMC system.

In one embodiment, the BER is analyzed under AWGN and line-of-sight fading conditions, which is very important for vehicle communications, where the FBMC systems perform better with higher modulation schemes such as 64-QAM.

In one embodiment, the PAPR of the FBMC system with SF=6 is slightly better than SF=4 and SF=8, so the FBMC system has better PAPR values when the QAM order is higher.

2 10 shows a PPN FFT implementation of the transmitter filter bank according to an embodiment of the present disclosure. The filter bank at the receiver follows the same scheme, except that the discrete Fourier transform replaces the IFFT at the transmitter and the frequency shifts are multiples of -1/M. Also at the receiver, the filter elements are the same for all filters in the bank since it is the summation of the received subchannel signals, the signals are separated using the DFT and the processing is done together. The system delay is K multicarrier symbol periods due to the prototype filter delay in transmitting and receiving a filter bank 3 and 4 shown, and for K = 6, 8 the complete PPN requires K x M multiplications, which is less than that of the IFFT as the number M of sub-channels increases.

5(a) and 5(b) Figure 12 shows FBMC and OFDM PSD analysis without and with AWGN channel in accordance with an embodiment of the present disclosure. The FBMC and OFDM transmit signals are resampled to increase the sampling rate by 4 and the frequency axis is normalized to one.

6 12 shows a complementary cumulative distribution function (CCDF) of the FBMC system with variable overlap factors and the OFDM system, in accordance with an embodiment of the present disclosure. The complementary cumulative distribution function (CCDF) is a peak-to-average power ratio (PAPR) indicator that shows the distribution of power in dB versus average power, with the vertical axis in the CCDF analysis graphs representing the probability that the signal power is greater than the corresponding average power in dB, represented by the horizontal axis, with OFDM having a higher probability To transmit signals with higher PAR than FBMC when spreading factor K increases and FBMC PAR performance is better than OFDM.

7(a) and 7(b) show a BER analysis of FBMC and OFDM systems under AWGN conditions in accordance with an embodiment of the present disclosure. It can be observed that the OFDM system performs better than the FBMC systems in the BER analysis with QPSK modulation. However, at higher modulation schemes such as 64-QAM, FBMC systems are also close behind OFDM when the overlap factor K=8.

8(a) and 8(b) 12 show the BER analysis under different fading conditions, ie under HLOS, RLOS and UALOS conditions, according to an embodiment of the present disclosure. However, compared to AWGN conditions, the BER is very high under different fading conditions due to the randomness of the attenuation. The BER performance is more or less similar for different overlap factors like K=4, 6 and 8 with higher modulation order like 64 QAM.

9 shows the BER analysis of FBMC and OFDM systems with QPSK, 16QAM and 64QAM. It can be observed that the simulated and real-time measured BER values for FBMC and OFDM systems agree very well. The BER performance of OFDM and FBMC is similar, with OFDM performing slightly better. FBMCs with SF=6 and 8 perform slightly better than SF=4 under low SNR conditions, which means that under noisy conditions FBMCs with higher spreading factors perform better.

10 Table 1 shows a PAPR comparison for FBMC and OFDM systems in accordance with an embodiment of the present disclosure. Table 1 shows the performance parameters of the PAPR using a Keysight power meter on the receiver side for both FBMC and OFDM systems. It is observed that the PAPR of FBMC system is slightly better than OFDM system. The PAPR value of FBMC with SF=6 is slightly better than that of FBMC with SF=4 and SF=8. If so the QAM order is high, the PAPR value in FBMC system is better than in OFDM system.

The figures and the preceding description give examples of embodiments. Those skilled in the art will understand that one or more of the elements described may well be combined into a single functional element. Alternatively, certain elements can be broken down into multiple functional elements. Elements from one embodiment may be added to another embodiment. For example, the order of the processes described herein may be changed and is not limited to the manner described herein. Also, the acts that are not dependent on other acts may be performed in parallel with the other acts. The scope of the embodiments is not limited by these specific examples way limited. Numerous variations are possible, regardless of whether they are explicitly mentioned in the description or not, e.g. B. Differences in structure, dimensions and use of materials. The scope of the embodiments is at least as broad as indicated in the following claims.

Advantages, other benefits, and solutions to problems have been described above with respect to particular embodiments. However, the benefits, advantages, problem solutions, and components that can cause an advantage, benefit, or solution to occur or become more pronounced are not to be construed as a critical, required, or essential feature or component of any or all claims.

Reference List

100

A non-orthogonal filter bank multicarrier system (FBMC) for 5g communications

102

A signal generation module

104

A vector signal generator (VSG) module

106

A vector signal analyzer (VSA) module

108

A bit error rate (BER) analysis module

110

A power meter

112

A power sensor

Claims (6)

A non-orthogonal filter bank multi-carrier system (FBMC) for 5G communication, the system being characterized by : a signal generation module for generating an FBMC signal, the module being connected to a multi-phase multi-carrier network filter bank (PPN-FBMC). in which each FBMC signal is filtered prior to transmission to eliminate inter-carrier interference (ICI) and inter-symbol interference (ISI); a vector signal generator (VSG) module for transmitting the FBMC signal as a transmitter, the FBMC transmitter including a modulator and a mapper for modulating and mapping the FBMC signal to generate a transmission bit prior to transmission through a channel; a vector signal analyzer (VSA) module for receiving the FBMC signal as a receiver, the FBMC receiver including a demodulator and a demapper for demodulating and demapping the FBMC signal to generate a received bit; a receiver-side Bit Error Rate (BER) analysis module including a processing unit for calculating the BER for a given signal-to-noise ratio (SNR); and a receiver side mounted power meter comprising a power sensor for measuring the peak to average power ratio (PAPR). system after claim 1 , where the bandwidth efficiency of the FBMC system is 100% at higher order overlap factors, ie K=6 and K=8. system after claim 1 , where the out-of-band (OOB) emissions are minimal in the FBMC system, resulting in a lower adjacent channel leakage ratio (ACLR). system after claim 1 , where the peak power to average power ratio (PAPR) of the factor K=6 and K=8 is slightly better than the factor K=4 in the FBMC system. The system after claim 1 , where the BER is analyzed under AWGN and line-of-sight fading conditions, which is very important for vehicle communications, with the FBMC systems performing better with higher modulation schemes such as 64-QAM. system after claim 1 , where the PAPR of the FBMC system with SF=6 is slightly better than SF=4 and SF=8, so the FBMC system has better PAPR values when the QAM order is higher.

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