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A Design Method of Double Layer Filter Bank for DVB-RCS2

A technology of DVB-RCS2 and design method, applied in the field of satellite communication, can solve problems such as difficulty in practical use, high implementation complexity and cost, and reduction of implementation complexity, and achieve the effect of low simplicity, low complexity, and high flexibility

Active Publication Date: 2022-04-01
NANJING XIANFENG SHUOTONG WIRELESS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

RNFB can in principle be implemented directly by bandpass interpolation / decimation with variable conversion factor and center frequency, which requires construction using variable upsamplers / downsamplers and bandpass filters with variable center frequency and bandwidth Variable parameter interpolator / decimator, however, this direct method to cover such a large range of interpolation / decimation factors requires a large number of filters with different orders and characteristics, which is extremely complex and costly to implement, Difficult to use
There are various design methods such as recombination method, modulation method, and coefficient extraction method for RNFB implementation with low complexity, but none of these methods take advantage of the characteristics of MF-TDMA superframe / frame composition for design, and there is still a lot of room for reduction in implementation complexity

Method used

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  • A Design Method of Double Layer Filter Bank for DVB-RCS2
  • A Design Method of Double Layer Filter Bank for DVB-RCS2
  • A Design Method of Double Layer Filter Bank for DVB-RCS2

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Embodiment Construction

[0054] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0055] Such as Figures 1 to 5 Shown, the double-deck filter bank design method that is used for DVB-RCS2 of the present invention is specifically as follows:

[0056] Such as figure 1 As shown, the first layer uses a cosine modulated filter bank (CMFB) based perfect recombination (PR) multiplexing converter (TMUX) to realize a full-band MF-TDMA RNFB with variable time-frequency resolution between frames, as Figure 4 As shown, the RNFB is implemented with a multi-phase structure, which reduces the complexity and improves the operation speed. The specific design method mainly includes the following steps:

[0057] First set the known sampling rate factor as , is the frequency band number of the full-band MF-TDMA frame, and ,in, Indicates the decimation factor,...

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Abstract

The present invention provides a double-layer filter bank design method for DVB-RCS2, utilizes the characteristics of MF-TDMA superframe / frame composition, adopts double-layer FB technology, and the first layer adopts PR TMUX based on CMFB to realize full frequency band RNFB with variable time-frequency resolution between MF‑TDMA frames. RNFB is implemented with a polyphase structure to reduce complexity and improve computing speed. The second layer uses polyphase interpolation technology to realize multi-carrier uniform FB within an MF‑TDMA frame. The present invention designs an FB that can almost perfectly support the dynamic allocation of DVB-RCS2 RL MF-TDMA frequency-time slot resources. Compared with full-band MF-TDMA, all subcarrier filters are implemented by classic RNFB, and the present invention has high flexibility. , low complexity and simplicity.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and in particular relates to a double-layer filter bank design method for DVB-RCS2. Background technique [0002] The Digital Video Broadcasting-Return Channel via Satellite (DVB-RCS) broadband satellite communication system that provides various interactive services usually consists of geostationary satellites operating in the C, X, Ku and Ka frequency bands and a large number of Distributed in a wide geographical area, it consists of Return Channel Satellite Terminals (RCST) using small aperture antennas. RCST communicates with HUB gateway stations through satellites. DVB-RCS2 is a new system of satellite interactive network proposed on the basis of DVB-RCS. This new system adopts the working mode of DVB-S2 forward broadcast and multi-frequency-time-division multiple access (MF-TDMA) multi-point backhaul. All The terminal uses MF-TDMA to share the satellite return channel, in w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H17/02
CPCH03H17/0294H03H17/0273H03H17/0219H03H2017/0072H03H2017/0081
Inventor 王捷缪开济
Owner NANJING XIANFENG SHUOTONG WIRELESS TECH