用Chirp-BOK调制进行热层散射通信通道的性能分析
Junhu Shao1, Zaiping Liu1, Yishuo Liu1
1Xi'an Key Laboratory of Wireless Optical Communication and Network Research, School of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China.
Entropy (Basel, Switzerland)
|January 8, 2025
概括
Chirp-BOK调制通过降低噪音环境中的调制值来改善热散射器通信. 这项研究得出并模拟了其比特错误率,在最佳参数配置下显示了显著的性能增长.
科学领域:
- 无线通信无线通信
- 信号处理 信号处理
- 信息理论 信息理论
背景情况:
- 热带层散射 (Troposcatter) 链接对于超视线通信至关重要.
- Chirp-BOK (二元直角键) 调制在具有挑战性的信号环境中提供了潜在的优势.
- 优化调制方案是提高在弱信号条件下可靠性的关键.
研究的目的:
- 从理论上推导并从数值上评估Rayleigh色通道中chirp-BOK调制的比特误差率 (BER).
- 通过使用多路径模型,研究chirp-BOK对深度色的热散链的性能.
- 确定最佳的系统参数,以最大限度地提高性能.
主要方法:
- 对雷利色衰减的 chirp-BOK 的 BER 公式的理论推导.
- 用不同的chirp-BOK参数对BER性能进行数值计算.
- 模拟使用七路径等延迟雷利色模型用于深度色场景.
- 在不同的点击延迟和时间带宽产品参数下进行系统BER性能模拟.
主要成果:
- 通过雷利衰减通道建立了对 chirp-BOK 的比特错误率 (BER) 公式.
- 数字和模拟结果显示了BER在各种参数下的性能.
- 与非优化配置相比,最佳系统配置在10-4的BER下实现了1.7dB至10dB的性能增长.
- 性能收益因不同的路径-收益-向量和点击延迟而有所不同.
结论:
- Chirp-BOK调制在强噪声和弱信号环境中提供了较低的解调值和出色的线性频率调制特性.
- 由此得出的理论框架和模拟结果验证了chirp-BOK对热散传播的有效性.
- 优化参数选择对于最大限度地提高 chirp-BOK 在色通道中的性能好处至关重要.
相关概念视频
01:30Propagation Speed of Electromagnetic Waves
3.3K
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
3.3K
01:19Transfer function and Bode Plots-I
304
A transfer function presented in its standard form integrates elements' constant gain, the zeros, and poles at the origin, simple zeros and poles, and quadratic poles and zeros. The transfer function can be written as H(ω):
304
01:23Transfer function and Bode Plots-II
297
In the standard form, the transfer function is shown in constant gain, poles/zeros at origin, simple poles/zeros, and quadratic poles/zeros; each contributing uniquely to the system's overall response. The term represents the magnitude of the simple zero:
297
01:21Properties of Fourier Transform I
156
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...
156
01:23Design 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
01:05Doppler Effect - II
3.3K
The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...
3.3K