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Low-power-consumption multi-order interpolation half-band filter with two-phase structure

A half-band filter, phase structure technology, applied in electrical components, digital technology networks, impedance networks, etc., can solve the problems of high power consumption, reduce the total amount of logic operations, etc., achieve circuit structure optimization, reduce the total amount of logic operations, etc. The effect of optimizing power consumption

Inactive Publication Date: 2011-09-14
ZHEJIANG UNIV
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Problems solved by technology

[0007] The present invention provides a low-power two-phase structure multi-order interpolation half-band filter, which solves the technical problems of traditional two-phase structure interpolation half-band filter hardware overhead and relatively large power consumption, and further optimizes the performance Consumption, reducing hardware overhead, reducing the total amount of logic operations

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Embodiment Construction

[0025] In order to describe the present invention more specifically, the technical solutions and related principles of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] Such as Figure 4 As shown, a low-power two-phase structure 18-order interpolation half-band filter includes a first delay function module, a second delay function module, a third delay function module, a fourth delay function module, and a four-input adder J and the sampling function module.

[0027] The first delay function module consists of the first delay register Y 1 , the eighth delay register Y 8 , the first delay multiplier H 1 and the first delay subtractor S 1 composition. where the first delay register Y 1 The input terminal of is the first input terminal of the first delay function module and is connected with the first delay subtractor S 1 connected to the minuend input, the first delay register Y 1 The ...

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Abstract

The invention discloses a low-power-consumption multi-order interpolation half-band filter with a two-phase structure. The filter comprises m delay functional modules, a multi-input adder and a sampling functional module, wherein m is a natural number which is more than or equal to 1; and n is an order number and is equal to 4m+2. In the multi-order interpolation half-band filter with the two-phase structure, the circuit structure is optimized by fully utilizing the coefficient characteristic of the interpolation half-band filter, a multiplier is eliminated on the premise of keeping the performance invariant and an additional delay time register is not added, so that the total logic operation amount is reduced, the hardware overhead is reduced, the chip area is reduced, and the power consumption is further optimized. The multi-order interpolation half-band filter with the two-phase structure can be widely applied to the fields of communication systems, interface circuits, software radio and the like.

Description

technical field [0001] The invention belongs to the technical field of digital integrated circuits, and in particular relates to a low-power two-phase structure multi-order interpolation half-band filter. Background technique [0002] In the communication system, interface circuit, software radio and other application fields, it is necessary to convert the sampling frequency of the digital signal, and the interpolation filter completes the up-sampling of the signal. The interpolation half-band filter is widely used in upsampling circuits because of its excellent passband ripple and stopband attenuation control capabilities. figure 1 It is a structural schematic diagram of a traditional interpolation half-band filter. The interpolation half-band filter is composed of an upsampling module and an anti-imaging low-pass filter. The upsampling module upsamples the signal, that is, between two A zero value is inserted between adjacent values ​​to provide 2 times upsampling; the an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H17/06
Inventor 吴晓波李晶赵梦恋赵津晨
Owner ZHEJIANG UNIV
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