Digital channelizing method and circuit

A digital channelization and circuit technology, applied in the direction of electrical components, transmission systems, etc., can solve the problem of not being able to fully adapt to the cross-channel distribution of signals

Active Publication Date: 2012-02-15
TSINGHUA UNIV
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This method cannot fully adapt to the situati...

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Embodiment Construction

[0043] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0044] Such as figure 1 As shown, the digital channelization method of the present invention comprises the following steps:

[0045] S1: Determine the number of channels in the analysis part 2M and the corresponding number of FFT points in the comprehensive part when performing signal reconstruction

[0046] S2: Determine the decimated polyphase filter order L according to the prototype filter order N and the analysis part channel number 2M;

[0047] In this step, said L=N / 2M.

[0048] S3: determining the coefficients of the polyphase filter bank;

[0049] In this step, the input signal x(n), n=0, 1, ... is arranged as x according to the extraction factor M ph , and...

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Abstract

The invention discloses a digital channelizing method and circuit, relating to the technical field of broadband reception. The method comprises the following steps of: S1, determining a channel number 2M of a part to be analyzed and an FFT (Fast Fourier Transform Algorithm) point number of a corresponding integrated part during signal reconstruction; S2, determining a multi-phase filter order L after extraction according to a prototype filter order N and the channel number 2M of the part to be analyzed; S3, determining a coefficient of a multi-phase filter group; S4, performing multi-phase filtering on the part to be analyzed; S5, performing Fourier transformation on filtered signals to obtain yA; S6, judging whether the signals distribute in a cross-channel manner or not, if not, executing a step S7, and if so, executing a step S8; S7, performing baseband processing on the obtained signal yA and then outputting a signal yA'; S8, performing Fourier transformation on the signal yA to obtain yS; S9, leading the signal ys to a multi-phase filter group CS in the integrated part for filtering to obtain yf; and S10, interpolating 0 into the obtained signal yf and performing delayed addition to obtain a system output yout. According to the invention, the adaptability to signal reception can be enhanced, and the computation amount is reduced at the same time.

Description

technical field [0001] The invention relates to the technical field of broadband reception, in particular to a digital channelization method and circuit. Background technique [0002] The performance and engineering feasibility of wideband reception are not only related to the distribution position of received signals in the frequency domain, but also depend on the number of simultaneously arriving signals. In practical applications, limited by the mismatch between the high-speed A / D converter and the subsequent general-purpose hardware platform, if the adopted receiving technology cannot take these factors into account, the physical feasibility of broadband reception will be seriously affected. [0003] The parallel digital down-conversion channelization technology has strong adaptability to the received signal, and the polyphase DFT filter bank has high efficiency for multiple simultaneously arriving signals uniformly distributed in the spectrum, so these two methods are w...

Claims

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Application Information

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IPC IPC(8): H04B1/00
Inventor 黄振王芳陆建华
Owner TSINGHUA UNIV
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