Wide / Narrow-band Signals Digital Receiver Technology

In the modern electronic warfare, the technology of channelized digital receiver has many advantages: a very great instantaneous bandwidth; multi-signal processing; the receiving in total probability within the monitor bandwidth; being able to complement with other technologies easily. But most of the previous studies for the channelized digital receiver only focused on the handling in a single channel, they didn't take into account the cross-channel problem. With the developing of the current research for the broadband signal, the cross-channel problem is necessary to be solved. This paper is on the basis of keeping well-received for the narrowband signal, studying how to deal with the broadband signals, and have a lot of the simulation in the computer to show the reference to the actual design of receiver. The main contents are as follows:1. Identifying several analysis methods and using a joint analysis named STFT-WVD. This analysis is on the basis of retaining the advantages of the WVD transform, and has removed the cross-term interference. The method of signal analysis laid the foundation for this paper's system simulation.2. The research on the integrated decision of channel. Previous study of channel is only put it's eyes on the one single channel's signal processing. When the cross-channel problem comes true, this kind of decision is hard to solve. This paper uses the singular point analysis, presents a comprehensive decision-channel approach, this approach will not only be able to sentence a single channel signal on whether existing a signal, but also be able to sentence if there is cross-channel problem happen.3. The integrated modeling for receiving wide or narrow band signals. Studying the relationship between wideband digital receiver sampling technology and channelized IFM technology, making the cross-channel problem's solving come true, supply a wide and narrow band signals'receiving based on the simulation. Having a detailed analysis of the filter bank design for the channel-based technology, make the design requirements for the VSB filer as the prototype low-pass filter condition, using the DFT technology to achieve the system's filter bank. Analyzing the advantages and disadvantages of all the sentences for the channel, and identifying a self-correlation: making detection + spectral data fitting+ positive and negative slope sentence as the channel integrated approach. At last, simulating for the wide and narrow band signal digital technology, this simulation is from the BER-SNR picture of single BPSK and the single-frequency signals and LFM signal's frequency measurement error-SNR to the double BPSK and LFM signal measurement, just for supplying a reference for the actual.