Performance evaluation and comparison of different multicarrier modulation schemes

Zafar, Adnan; Imran, Muhammad Ali; Xiao, Pei; Cao, Aijun; Gao, Yonghong

doi:10.1109/camad.2015.7390479

Cited by 6 publications

(14 citation statements)

References 6 publications

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“…For a fair comparison between MIMO-FBMC and MIMO-OFDM systems, the SNR loss, due to the cyclic prefix (overhead) in OFDM, must be considered. For this reason, we have calculated the noise power for both systems as discussed in [12]. The comparison shows the significance of the proposed algorithm especially for higher modulation schemes.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…However, truncation may lead to interferences in the system that can significantly degrade the system performance. Without any compensation, the maximum allowable cut off symbols would be K − 2 so as to keep the signals detectable [12]. However, with compensation we can completely discard all the K − 1 symbols while still keeping the signals detectable.…”

Section: ) Real Branch Prototype Filtermentioning

confidence: 99%

“…where n = [n 1 , n 2 , · · · , n Nr ] T ∈ C M N Nr×1 is a Gaussian noise vector with each element having zero mean and variance σ 2 . To represent the convolution process given in (12) as matrix multiplication, we define the l th tap multipath fading factor Z l of the MIMO channel as a block diagonal matrix by taking the kronecker product of an identity matrix I (K+M −1)N with Z l as…”

Section: B Passing Through the Channelmentioning

confidence: 99%

“…However, this approach is valid only when the block size M is large. For instance when M = 20, the total overhead is only 5% and this percentage further drops when M goes to larger value [12]. However, considering different traffic models and also the latency of the data, the solution that one symbol (front) case may cause significant overhead e.g.…”

Section: Proposed Compensation Algorithmmentioning

confidence: 99%

“…The authors in [36] have introduced non data symbols (virtual symbols) before and after each FBMC data packet for shortening the ramp-up and ramp-down periods. In [12], it is pointed out that filter output truncation (FOT) or tail cutting can improve the spectral efficiency of FBMC system but require one extra tail to be transmitted as overhead along with the FBMC block.…”

Section: Introductionmentioning

confidence: 99%

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Spectrum Efficient MIMO-FBMC System Using Filter Output Truncation

Zafar

Zhang

Xiao

et al. 2018

IEEE Trans. Veh. Technol.

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Abstract-Due to the use of an appropriately designed pulse shaping prototype filter, filter bank multicarrier (FBMC) system can achieve low out of band (OoB) emissions and is also robust to the channel and synchronization errors. However, it comes at a cost of long filter tails which may reduce the spectral efficiency significantly when the block size is small. Filter output truncation (FOT) can reduce the overhead by discarding the filter tails but may also significantly destroy the orthogonality of FBMC system, by introducing inter carrier interference (ICI) and inter symbol interference (ISI) terms in the received signal. As a result, the signal to interference ratio (SIR) is degraded. In addition, the presence of intrinsic interference terms in FBMC also proves to be an obstacle in combining multiple input multiple output (MIMO) with FBMC. In this paper, we present a theoretical analysis on the effect of FOT in an MIMO-FBMC system. First, we derive the matrix model of MIMO-FBMC system which is subsequently used to analyze the impact of finite filter length and FOT on the system performance. The analysis reveals that FOT can avoid the overhead in time domain but also introduces extra interference in the received symbols. To combat the interference terms, we then propose a compensation algorithm that considers odd and even overlapping factors as two separate cases, where the signals are interfered by the truncation in different ways. The general form of the compensation algorithm can compensate all the symbols in a MIMO-FBMC block and can improve the SIR values of each symbol for better detection at the receiver. It is also shown that the proposed algorithm requires no overhead and can still achieve a comparable BER performance to the case with no filter truncation.

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Section: Simulation Resultsmentioning

confidence: 99%

Section: ) Real Branch Prototype Filtermentioning

confidence: 99%

Section: B Passing Through the Channelmentioning

confidence: 99%

Section: Proposed Compensation Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spectrum Efficient MIMO-FBMC System Using Filter Output Truncation

Zafar

Zhang

Xiao

et al. 2018

IEEE Trans. Veh. Technol.

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Efficiency Analysis of a Truncated Flip-FBMC in Burst Optical Transmission

et al. 2021

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A novel Flip-filter bank multicarrier (Flip-FBMC) based transmultiplexer (TMUX) with offset quadrature amplitude modulation is proposed to enhance the Flip-OFDM performance. Moreover, the possibility to reduce the TMUX response (latency) and increase the gain in the spectral efficiency have been investigated for the first time through a tail shortening method. The proposed design is based on a biorthogonal form for visible light communication (VLC) to increase the flexibility degree of the design requirements. However, the spectral efficiency is detected to be suffering from the ramp-up and the rampdown at the beginning and end, respectively, of the data burst. Hence, as penalty, Flip-FBMC imposes 9extra symbols than Flip-OFDM packet and two-factor compared to DCO-FBMC burst. A hard truncation for the lowest energy tail contributes to minimize the latency and limits the system penalty to 2.5 symbols which is lower than DCO-FBCM by 2 symbols. The results show that the prototype filter of Heisenberg factor (≈ 1) is highly desired to reduce the energy loss of truncated tail and improves the symbol error rate (SER) performance. The Flip-FBMC over a direct line-of-sight VLC channel gain is analyzed and, the channel estimation of truncated burst, which based on the interference approximation method (IAM) of IAM-C type, exhibits a superior performance of 1.5 dB at 10 -3 SER over IAM-R method and 1dB at 10 -5 SNR over a cyclic prefix of 1 point Flip-OFDM. On the other hand, the analysis reveals that IAM-C are slightly impacted by the burst cut compared to the nontruncated model. INDEX TERMS Filter bank multicarrier (FBMC), hard truncation methods, Heisenberg factor, interference approximation method, visible light communication (VLC), Flip-OFDM This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.

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A Review on Different Modulation Schemes for Massive MIMO

Sruthi¹,

J²

2019

2019 International Conference on Intelligent Computing and Control Systems (ICCS)

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Performance evaluation and comparison of different multicarrier modulation schemes

Cited by 6 publications

References 6 publications

Spectrum Efficient MIMO-FBMC System Using Filter Output Truncation

Spectrum Efficient MIMO-FBMC System Using Filter Output Truncation

Efficiency Analysis of a Truncated Flip-FBMC in Burst Optical Transmission

A Review on Different Modulation Schemes for Massive MIMO

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