通用过器银行直角频率分割多重复合:用于超宽带宽和灵活服务的低复杂度波形
Yu Xin1,2, Jian Hua1,2, Tong Bao1,2
1State Key Laboratory of Mobile Network and Mobile Multimedia Technology, Shenzhen 518055, China.
Entropy (Basel, Switzerland)
|November 27, 2024
概括
为第六代 (6G) 无线网络引入了一种新的通用过器银行直角频率分割多重复合 (GFB-OFDM) 波形. GFB-OFDM解决了太赫兹通信带宽需求,在效率和性能方面超过了当前的方法.
科学领域:
- 无线通信工程 无线通信工程
- 信号处理 信号处理
- 电信 电信服务 电信服务 电信服务
背景情况:
- 太赫兹 (THz) 通信对于第六代 (6G) 移动网络至关重要,需要超宽带宽来实现超高的数据速率.
- 在5G新无线电 (NR) 中现有的正交频率分割多重复合 (OFDM) 对THz带宽要求的子载波间距和快速里埃变换 (FFT) 尺寸有局限性.
- 在4G/5G中使用的循环前直角频率分割多重复合 (CP-OFDM) 需要为不同的带宽使用多个过器.
研究的目的:
- 提出一种新的波形,即通用过器银行直角频率分割多重复合 (GFB-OFDM),以克服当前OFDM系统在THz通信中的超宽带限制.
- 为了提高频谱效率和灵活性,在6G网络中提供多样化的服务.
- 为了证明与现有的CP-OFDM技术相比,性能优越.
主要方法:
- 使用两个较小尺寸的IFFT (M点和N点,其中K=N×M) 实现一个K点反式快里叶变换 (IFFT).
- 设计GFB-OFDM以支持灵活的子载波间距和单个符号内的多个子带.
- 由于子带过,对所有带宽使用固定过器,并利用现有的CP-OFDM检测方法.
主要成果:
- GFB-OFDM有效地容纳了灵活的子载波间距和多个子带,使多种服务成为可能.
- 拟议的波形支持不同的带宽与单一的固定过器,不像CP-OFDM.
- 模拟证实GFB-OFDM在减少带外泄漏,降低复杂性和改进错误性能方面超过了CP-OFDM.
结论:
- GFB-OFDM为6G网络的THz通信中的超宽带挑战提供了可行和高效的解决方案.
- 波形在灵活性,过器管理和与现有检测方案的兼容性方面提供了显著的优势.
- GFB-OFDM展示了卓越的性能指标,使其成为未来无线通信系统的有希望的候选人.
相关概念视频
Bandpass Sampling
162
In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
162
Properties of Fourier Transform I
159
The application of Fourier Transform properties in radio broadcasting is multifaceted, enabling significant advancements in the way signals are transmitted and received. Key areas where these properties are utilized include simultaneous multi-channel transmission, audio clip speed adjustments, live broadcast delays for different time zones, audio frequency adjustments, and signal demodulation.
In radio broadcasting, multiple audio signals often need to be transmitted simultaneously. The Fourier...
In radio broadcasting, multiple audio signals often need to be transmitted simultaneously. The Fourier...
159
Passive Filters
521
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
521
Design Example
316
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
316
Discrete-Time Fourier Series
226
The Discrete-Time Fourier Series (DTFS) is a fundamental concept in signal processing, serving as the discrete-time counterpart to the continuous-time Fourier series. It allows for the representation and analysis of discrete-time periodic signals in terms of their frequency components. Unlike its continuous counterpart, which utilizes integrals, the calculation of DTFS expansion coefficients involves summations due to the discrete nature of the signal.
For a discrete-time periodic signal x[n]...
For a discrete-time periodic signal x[n]...
226
Active Filters
783
Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
783


