High-speed low-complexity second-order all-pass filter

An all-pass filter, low-complexity technology, applied in impedance networks, digital technology networks, electrical components, etc., can solve problems such as large hardware delays, and achieve the effect of reducing hardware overhead and shortening critical path delays

Active Publication Date: 2019-11-29
极芯通讯技术(安吉)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of the present invention provides a high-speed and low-complexity second-order all-pass filter, which is used to solve the large hardware delay of the second-order all-pass filter in the prior art technical issues

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  • High-speed low-complexity second-order all-pass filter
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  • High-speed low-complexity second-order all-pass filter

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Embodiment Construction

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0035] figure 1 A schematic diagram of a high-speed and low-complexity second-order all-pass filter provided for the embodiment of the present invention, as shown in figure 1 As shown, the second-order all-pass filter includes:

[0036] The first addition unit 101, the second addition unit 102, the first multiplication unit 103, the secon...

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Abstract

The invention provides a high-speed low-complexity second-order all-pass filter which comprises an A1 addition unit, an A2 addition unit, an M1 multiplication unit, an M2 multiplication unit, a D1 delay unit, a D2 delay unit, a D3 delay unit, a D4 delay unit, a D5 delay unit and a D6 delay unit. According to the second-order all-pass filter provided by the invention, through frequency multiplication and hardware multiplexing, the hardware overhead is reduced, the key path delay is shortened, the key path length is the delay of one multiplier, and the second-order all-pass filter is suitable for baseband and digital intermediate frequency filtering processing in broadband mobile communication.

Description

technical field [0001] The invention relates to the technical field of digital signal processing, in particular to a high-speed and low-complexity second-order all-pass filter. Background technique [0002] The all-pass filter is a common infinite impulse response filter (IIR), which is often used for phase balancing to achieve an approximate linear phase filter. Compared with the linear phase filter based on the finite impulse response filter (FIR), the order of the approximate linear phase filter is greatly reduced, thus requiring less hardware resource overhead. [0003] In the prior art, the all-pass filter is usually implemented in the form of cascading second-order all-pass filter modules. The hardware implementation of the second-order all-pass filter usually adopts a biquad filter (Biquad Filter) or a waveform digital filter (WaveDigital Filter). [0004] However, the biquad filter needs 4 multipliers and 3-4 adders, and the hardware overhead is very large. The cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H17/00
CPCH03H17/0009
Inventor 刘大可刘劭晗
Owner 极芯通讯技术(安吉)有限公司
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