CN105099395A - Configurable digital filter device - Google Patents

Abstract

The invention provides a configurable digital filter device, and includes an instruction controller, a filter coefficient multiplexing module, a sampling data input module, a data engine module and an arithmetic module. The instruction controller is connected with the data engine module and the arithmetic module, the data engine module is connected to the arithmetic module and used for providing a filter coefficient and sampling data to the arithmetic module, the filter coefficient multiplexing module is connected with the data engine module, and a sampling data input module is connected with the data engine module. The device can share the data engine module and the arithmetic module, can perform instruction control on the data engine module and the arithmetic module, and enables the arithmetic module to complete multiplication and addition operation in a unified manner, different types of filters can be realized, a universal function is realized, multiplexing between different modes can be satisfied, a circuit delay can be shortened, and operation efficiency is improved.

Description

A kind of configurable digital filter apparatus

Technical field

The present invention relates to a kind of mobile terminal digital filter apparatus, particularly relate to a kind of configurable digital filter apparatus.

Background technology

At present, in the technology of mobile communication, digital filter is important part, it have high accuracy, high reliability, program-controlled change characteristic or multiplexing, be convenient to the advantages such as integrated.Digital filter is at code model optimization, picture signal process, medical biotechnology signal transacting and other applications are (as communication, radar, sonar, instrument and meter and seismic prospecting etc.) be obtained for and apply widely, digital filtering technique has also become important technology simultaneously, it is no matter the acquisition of signal, transmission, or the process of signal and exchange all be unable to do without digital filtering technique, its transmission that is reliable to signals security and efficient, flexible is vital, in digital filtering process, mainly realized by the multiplication operations of filter factor and sampled data and accumulation operations.

The delay operation that sampled data is carried out is related generally in digital filter, sampled data and filter factor take advantage of operation, and the add operation etc. to all products, in circuit realiration, addition and multiplication are all compare to take resource, and the time delay of addition and multiplication function unit is also long, because the difference of different mode algorithm filter in multi mode terminal terminal, be difficult to carry out resource-sharing to these filters, because consumes resources is compared in add operation in filtering and multiplying, so data filtering function can take more calculation resources in mobile terminal in multi-module mobile terminal, in addition, the circuit delay of adder and multiplier itself is also long, so the direct multiplexing efficiency of different filter is lower under same mode.

Therefore, for above-mentioned defect, a kind of configurable digital filter apparatus of necessary design, to address the aforementioned drawbacks.

Summary of the invention

The object of the invention is to the defect overcoming prior art, provide a kind of configurable digital filter apparatus, it can realize the general utility functions of dissimilar filter, improves filtration efficiency, reduces costs.

The present invention is achieved in that a kind of configurable digital filter apparatus, comprises instruction control unit, filter factor Multiplexing module, sampled data input module, data engine module and computing module.Described instruction control unit connects described data engine module and computing module respectively, for controlling filter factor that described data engine module provides to described computing module and sampled data, also for controlling described computing module, calculation process is carried out for the filter factor received and sampled data; Described data engine model calling in described computing module, for providing filter factor and sampled data to described computing module; Described computing module, after multiplication and accumulation operations are carried out to the filter factor provided by described data engine module received and sampled data, output filtering result.Described filter factor Multiplexing module connects described data engine module, for providing filter factor to described data engine module; Described sampled data input module connects described data engine module, for providing sampled data to described data engine module.

Further, described data engine module comprises multiple data engine submodule.

Further, described data engine submodule comprises multiple data engine unit be connected successively, the quantity of the data engine unit comprised in each described data engine submodule is identical, described data engine unit is used for the filter factor received and sampled data to export as a data team, and carries out delay operation to sampled data.

Further, described data engine unit comprises storing sub-units and sampled data is carried out to the delayer of time delay.

Further, described data engine submodule also comprises the corresponding selector connected of multiple and described data engine unit, and described selector is for selecting the data provided by data engine submodule to the input of described computing module according to the control of described instruction control unit.

Further, the adder that described computing module comprises multiple operator module and is connected with described operator module, described adder draws filter result after being used for that the data of input are carried out add operation.

The invention provides a kind of configurable digital filter apparatus, comprise instruction control unit, filter factor Multiplexing module, sampled data input module, data engine module and computing module.Described instruction control unit connects described data engine module and computing module respectively, for controlling filter factor that described data engine module provides to described computing module and sampled data, also for controlling described computing module, calculation process is carried out for the filter factor received and sampled data; Described data engine model calling in described computing module, for providing filter factor and sampled data to described computing module; Described computing module, after multiplication and accumulation operations are carried out to the filter factor provided by described data engine module received and sampled data, output filtering result.Described filter factor Multiplexing module connects described data engine module, for providing filter factor to described data engine module; Described sampled data input module connects described data engine module, for providing sampled data to described data engine module.This device, shareable data engine modules and computing module, and instruction control can be carried out to data engine modules and computing module, make computing module unify multiply-add operation, dissimilar filter can be realized, realize general utility functions, what can meet between different mode is multiplexing, reach the fully multiplexing of filter multiplicaton addition unit often kind of mode internal simultaneously, and can circuit delay be shortened, improve operation efficiency.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

The structural representation of the configurable digital filter apparatus that Fig. 1 provides for the embodiment of the present invention;

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

As Fig. 1, the embodiment of the present invention provides a kind of configurable digital filter apparatus, comprises instruction control unit 1, filter factor Multiplexing module 2, sampled data input module 3, data engine module 4 and computing module 5.Instruction control unit 1 is connection data engine modules 4 and computing module 5 respectively, the filter factor provided to computing module 5 for control data engine modules 4 and sampled data, also carry out calculation process for control algorithm module 5 for the filter factor received and sampled data; Data engine module 4 is connected to computing module 5, for providing filter factor and sampled data to computing module 5; Computing module 5 for after carrying out multiplication and accumulation operations to the filter factor provided by data engine module 4 received and sampled data, output filtering result.Filter factor Multiplexing module 2 connection data engine modules 4, for the filter factor providing the filter factor that stored or real-time reception to arrive to data engine module 4; Sampled data input module 3 connection data engine modules 4, for the sampled data providing the sampled data that stored or real-time reception to arrive to data engine module 4.In this device, instruction control unit 1 comprises command memory, for storing the control command of universal filter, also decoder is comprised in instruction control unit 1, for completing the decoded operation to control command, instruction control unit 1 extracts the operational order that stores in memory and for control data engine modules 4 and computing module 5 after decoding.

Further, as shown in Figure 1, in specific embodiment structure of the present invention, data engine module 4 comprises N number of data engine submodule, is respectively data engine submodule 41, data engine submodule 42 until data engine submodule 4N.This N number of data engine submodule all comprises L the data engine unit be connected successively respectively, as data engine submodule 41 comprises data engine unit 411, data engine unit 412 until data engine unit 41L, then total L*N the data engine unit be connected successively of data engine module 4 one, when filter factor is less than L, filter factor in filtering is inputted same data engine submodule by instruction control unit, and filter factor is inputted so far each data engine unit in data engine submodule successively by exponent number order, with the formula 1

$y\left(m\right)=\underset{n-0}{\overset{N-1}{\mathrm{\Σ}}}h\left(n\right)\×(m-n)$

For example, filter factor h (0) in this filtering is inputed to the first data engine unit 411 of data engine submodule 41 by instruction control unit, filter factor h (1) is inputed to the second data engine unit 412 of data engine submodule 41, filter factor h (N-1) is inputed to the N data engine unit of data engine submodule 41.Sampled data is inputed to first data engine unit 411 in data engine submodule 41 by instruction control unit 1, sampled data after delay is inputed to second data engine unit 412 by delayer by first data engine unit 411, for n, in first data engine unit, sampled data is x (n), in second data engine unit, sampled data is x (n-1), and in m data engine unit, sampled data is x (n-m).Data engine module comprises L selector, and same selector is all connected with the data engine unit of same position in different pieces of information engine submodule, and each selector of instruction control unit knowledge all exports filter factor in data engine submodule 41 and sampled data.

Further, as shown in Figure 1, in specific embodiment structure of the present invention, each data engine unit includes storing sub-units and sampled data is carried out to the delayer of time delay, export as a data team for the filter factor that will receive and sampled data, and delay operation is carried out to sampled data.Instruction control unit is used for filter factor in filtering to input to each data engine unit corresponding with filtering mode successively by exponent number order, sampled data is inputed to first data engine unit in data engine module, data engine unit be used for will the filter factor that receive and sampled data as data to output, and delay operation is carried out to sampled data, the sampled data after time delay is input to next data engine unit.Wherein, the subelement for storing filter factor and the subelement for store sample data can also be comprised in storing sub-units.

Further, as shown in Figure 1, in specific embodiment structure of the present invention, data engine submodule 41 also comprises multiple selector of connecting corresponding to data engine unit, same selector is all connected with the data engine unit of same position in different pieces of information engine submodule, and selector is used for selecting to input to computing module 5 data provided by data engine submodule according to the control of described instruction control unit.

Further, as shown in Figure 1, in specific embodiment structure of the present invention, the adder that computing module 5 comprises multiple operator module and is connected with operator module, described adder draws filter result after being used for that the data of input are carried out add operation.Operator module carries out multiply operation to the h (0) in data engine unit 41 and x (m), multiply operation is carried out to the h (1) in data engine unit 42 and x (m-1), and input to adder after add operation is performed to the result of two multiply operations, adder the data that each operator unit exports are accumulated after as filter result.

Concrete, if filter factor has 24, now, instruction control unit is divided into a data engine submodule by every for the data engine unit comprised in data engine module 8, when carrying out data input, h (0) to h (7) is inputed to data engine unit 411 to the data engine unit 418 of data engine submodule 41, h (8) to h (15) is inputed to data engine unit 421 to the data engine unit 428 of data engine submodule 42.

Computing module 5 comprises 12 operator modules, and the 1st operator module 51 inputs filter factor and the sampled data of data engine unit 411 and data engine unit 412 output; 2nd operator module 52 inputs filter factor and the sampled data of data engine unit 413 and data engine unit 414 output; The like.

After computing module 5 receives Article 1 and so on, the data in data engine submodule 41 are carried out the accumulation operations of multiplication and multiplication result; After receiving Article 2 instruction, the data in data engine submodule 42 are carried out the accumulation operations of multiplication and multiplication result, and add up with the result of the first instruction; After receiving Article 3 instruction, the data in data engine submodule 3 are carried out the accumulation operations of multiplication and multiplication result, and add up with the result of the second instruction, obtain filter result.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (6)

1. a configurable digital filter apparatus, is characterized in that: comprise instruction control unit, filter factor Multiplexing module, sampled data input module, data engine module and computing module.

Described instruction control unit connects described data engine module and computing module respectively, for controlling filter factor that described data engine module provides to described computing module and sampled data, also for controlling described computing module, calculation process is carried out for the filter factor received and sampled data;

Described data engine model calling in described computing module, for providing filter factor and sampled data to described computing module;

Described computing module, after multiplication and accumulation operations are carried out to the filter factor provided by described data engine module received and sampled data, output filtering result.

Described filter factor Multiplexing module connects described data engine module, for providing filter factor to described data engine module;

Described sampled data input module connects described data engine module, for providing sampled data to described data engine module.

2. a kind of configurable digital filter apparatus as claimed in claim 1, is characterized in that: described data engine module comprises multiple data engine submodule.

3. a kind of configurable digital filter apparatus as claimed in claim 2, it is characterized in that: described data engine submodule comprises multiple data engine unit be connected successively, the quantity of the data engine unit comprised in each described data engine submodule is identical, described data engine unit is used for the filter factor received and sampled data to export as a data team, and carries out delay operation to sampled data.

4. a kind of configurable digital filter apparatus as claimed in claim 3, is characterized in that: described data engine unit comprises storing sub-units and sampled data carried out to the delayer of time delay.

5. the configurable digital filter apparatus of one as described in claim 2,3 or 4, it is characterized in that: described data engine submodule also comprises the corresponding selector connected of multiple and described data engine unit, described selector is for selecting the data provided by data engine submodule to the input of described computing module according to the control of described instruction control unit.

6. a kind of configurable digital filter apparatus as claimed in claim 1, it is characterized in that: the adder that described computing module comprises multiple operator module and is connected with described operator module, described adder draws filter result after being used for that the data of input are carried out add operation.