Cascade modulation filter bank channelizer design method suitable for high-flux satellite

Abstract

The invention, which belongs to the technical field of satellite communication, discloses a cascade modulation filter bank channelizer design method suitable for a high-throughput satellite. Signal separation is realized through a cascade modulation filter bank. Signal exchange is completed through a signal exchange module; and signal reconstruction is realized through a cascaded modulation filterbank; the normalization frequency of a signal sampling rate is 2pai, the minimum sub-channel bandwidth of the channelizer is 2pai / M, wherein the M is an integer and is generally the power of 2. According to the invention, with the cascaded modulation filter bank, improvement of the modulation filter bank is realized; on the premise of ensuring that the reconstruction performance of the filter bank meets the satellite communication requirement, the complexity is slightly increased; the filter bank is realized by designing a low-order prototype filter so as to finish signal separation and reconstruction, so that the design difficulty of the filter bank with high precision and high reconstruction performance is reduced. In addition, the cascaded modulation filter bank-based channelizer in hardware implementation can be applied to clocks of higher frequencies.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and in particular relates to a design method of a cascaded modulation filter bank channelizer suitable for high-throughput satellites. Background technique [0002] Since the satellite communication system can effectively cover communication areas such as ground, sea and air, it has become an effective means of providing point-to-point communication for areas that are not served or underserved by ground communication. The world has entered the era of the Internet of Things (IoT, Internet of things), and more and more terminal devices are connected to each other, making broadcast or multicast services more complicated. In order to meet people's increasing communication requirements, high-throughput satellite (HTS, High-Throughput Satellite) satellite communication systems have received more and more attention. Under the same orbital spectrum conditions and payload weight, compared...

AI Technical Summary

Problems solved by technology

[0011] The difficulty of solving the above problems and defects is: for a perfectly reconstructed exponentially modulated filter bank, it is necessary to solve the convex optimization function when designing the prototype filter. The longer the time required for the optimal value, the harder it is to obtain the optimal value when solving the optimization function, and even only the local optimal value can be obtained, so that the out-of-band attenuation of the prototype filter is small, and it cannot be used to design a high-precision channelizer

For an exponentially modulated filter bank with near-perfect reconstruction, the power complementarity of the prototype filter is poor, making the channelizer performance worse

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