Modulation Parameter Estimation Algorithm of Multi-Signal Compressed Sensing
Hua Feng Peng · Journal of Information Engineering University · 2013
The analog signal acquisition systems based on Compressed Sensing could solve the hard problem in huge data of wide-band signal acquisition,and it became the major development orientation of signal sampling.When it is used in communication reconnaissance or spectrum sensing,the received signal is a mixing of some narrow-band signals within a wide range.Then the modulated parameter estimation of the mixed signals is the key to subsequent signal analysis such as demodulation.The paper proposes a modulation parameter estimation algorithm focusing on cyclic cumulants,and derives the linear relationship between the compressed measurement and the mixed cyclic cumulants.The connection of cyclic frequency and modulated parameters can be applied to estimate the carrier frequency and symbol rate accurately.Simulation results show it has a good performance for the mixed signal which is modulated by MPSK or MQAM,and it costs little but plays well in noisy environment.