An Overview of FIR Filter Design in Future Multicarrier Communication Systems

Abstract

Future wireless communication systems are facing with many challenges due to their complexity and diversification. Orthogonal frequency division multiplexing (OFDM) in 4G cannot meet the requirements in future scenarios, thus alternative multicarrier modulation (MCM) candidates for future physical layer have been extensively studied in the academic field, for example, filter bank multicarrier (FBMC), generalized frequency division multiplexing (GFDM), universal filtered multicarrier (UFMC), filtered OFDM (F-OFDM), and so forth, wherein the prototype filter design is an essential component based on which the synthesis and analysis filters are derived. This paper presents a comprehensive survey on the recent advances of finite impulse response (FIR) filter design methods in MCM based communication systems. Firstly, the fundamental aspects are examined, including the introduction of existing waveform candidates and the principle of FIR filter design. Then the methods of FIR filter design are summarized in details and we focus on the following three categories—frequency sampling methods, windowing based methods and optimization based methods. Finally, the performances of various FIR design methods are evaluated and quantified by power spectral density (PSD) and bit error rate (BER), and different MCM schemes as well as their potential prototype filters are discussed.

Proposta de uma Função de Janela com Parâmetros Ajustáveis Baseada nos Polinômios de Jacobi com Aplicação no Sistema f-OFDM

“…Funções de janela tem sido propostas com o objetivo de atender às mais diversas aplicações [1]- [3]. Nos últimos anos, as funções de janela tem sido constantemente descritas e aplicadas em trabalhos envolvendo sistemas de modulação ortogonal, como por exemplo, UFMC (Universal Filtered Multi-Carrier) e OFDM (Orthogonal Frequency Division Multiplexing) [4]- [8]. De fato, estudos têm mostrado que algumas tecnologias de modulação para sistemas de comunicação sem fio de última geração podem apresentar baixa Emissão Fora de Banda (OOBE -Out-Of-Band Emission) do sinal transmitido quando comparadas à tecnologia OFDM convencional pelo fato de implantarem janelamento e/ou filtragem na forma de onda transmitida, como por exemplo, o sistema f-OFDM (filtered-OFDM) [5], [6], [9].…”

Transceiver Design for GFDM with Hexagonal Time–Frequency Allocation Using the Polyphase Decomposition

“…Up to now, the related waveforms are mainly based on the rectangular lattice structure with adopting a pulse shaping. It is known that the pulse shaping methods suffer from filter tailing on time and frequency domain [13]. Therefore, two main solutions are: (i) using a pulse with a good time-frequency localization; and (ii) leaving space between the symbols in the time-frequency lattice points.…”

Artificial intelligence for channel estimation in multicarrier systems for B5G/6G communications: a survey

“…2022 :116 subcarriers, yielding high spectral efficiency and throughput. In addition, these systems are resilient to multipath fading channels, impulsive noise interference, and intersymbol interference (ISI) [2,3]. Due to the development of digital signal processing, the MCM has been implemented in different wireless communication systems.…”

“…The conventional OFDM also adds a cyclic prefix (CP) to its symbol to mitigate ISI. Some OFDM waveform disadvantages comprise high peak-to-average power ratio (PAPR), frequency offset sensibility, and out-of-band leakage characteristics [1][2][3]. However, some techniques are introduced to OFDM systems to mitigate those drawbacks giving rise to some OFDM waveform variations, for example, wavelet OFDM, discrete Fourier transform spread OFDM, windowed OFDM, and resource block filtered [3,7,8].…”

“…However, FBMC still has some disadvantages, like suffering from high PAPR. Cosine modulated multitone, filtered multitone, and discrete Fourier transform spread approaches are some techniques that reduce the PAPR, introducing FBMC waveform variations [3,10].…”