MQAM modulation scheme recognition using Hilbert transform

XI Jia-xi; WANG Zong-xin

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MQAM modulation scheme recognition using Hilbert transform

更新时间：2024-10-14

- MQAM modulation scheme recognition using Hilbert transform
- Issue 6, Pages: 1-6(2007)
- 作者机构：
  
  1. 复旦大学通信科学与工程系
  2. 复旦大学通信科学与工程系,上海,200433
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN911.3
- Published：2007
- 稿件说明：
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XI Jia-xi, WANG Zong-xin. MQAM modulation scheme recognition using Hilbert transform[J]. 2007, (6): 1-6.
DOI：

XI Jia-xi, WANG Zong-xin. MQAM modulation scheme recognition using Hilbert transform[J]. 2007, (6): 1-6. DOI：

摘要

提出了一种MQAM信号的识别算法。该算法无需预先知道信号的波特率、载波频率

而是从接收信号中估计出波特率

再经过重采样、Hilbert变换、波特率取样、聚类

最后得到识别结果。该算法无需精确估计信号的载波频率

减少了运算量。仿真表明信噪比大于12dB、码元数目为1 024时

识别率高超过了95%

有望应用于实际非协作通信中信号的检测和识别。

Abstract

A modulation scheme recognition algorithm for MQAM signals was proposed.The method does not require the prior information about baud rate and carrier frequency of the received signals.Baud rate is estimated first

then re-sampling

Hilbert transformation

baud rate sampling and clustering are performed.It does not need carrier frequency estimation and decreases the calculation.Computer simulations show that the correct recognition ratio is larger than 95% if SNR is greater than 12dB and using 1024 or more symbols.So it is suitable for signal detection and recognition of practical applications.

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