KR102046911B1 - Apparatus and method for generating signal in communication system - Google Patents

Abstract

The present invention relates to an apparatus and method for generating a plurality of narrowband signals from a wideband signal through a filter bank in a communication system, wherein the wideband signal is buffered to extract data in a time domain, and After multiplying the data by a window function, a Fast Fourier Transform (FFT) is generated, and a plurality of narrowband signals are generated by multiplying the fast Fourier transformed data by a weighted pattern.

Description

Apparatus and method for generating signal in communication system

The present invention relates to a communication system, and more particularly to an apparatus and method for generating a plurality of narrowband signals from a wideband signal through a filter bank in a communication system.

In the current communication system, active researches are being conducted to provide users with services of various quality of service (QoS) having a high transmission speed (hereinafter referred to as 'QoS'). In such a communication system, studies are being actively conducted on methods for transmitting a large amount of data at high speed and normally through limited resources. In particular, in the current communication system, methods for normally transmitting and receiving large amounts of data using a limited frequency band have been proposed.

On the other hand, in a communication system, in order to effectively use a limited frequency band, a signal is transmitted and received over a wide band. In particular, a receiver in the communication system, as described above, has a specific frequency corresponding to the receiver itself in a signal transmitted and received over a wide band. Receives only signals in the band, and normally provides QoS-guaranteed services to users. Here, the receiver outputs a signal of the specific frequency band, that is, a narrowband signal by filtering a signal transmitted and received over the wideband, that is, a wideband signal. In this case, the receiver filters only the narrowband signal including the data corresponding to the services to be provided by the users from the wideband signal, and outputs the data corresponding to the users. Provide service.

However, in the current communication system, as described above, when the user wants to receive various services, the user must receive a plurality of narrowband signals each including data corresponding to the respective services. In order to output narrowband signals respectively, a plurality of filters respectively corresponding to the narrowband signals are required. In other words, in the current communication system, in order to normally provide various services to be provided by users, the wideband signal should be output as the narrowband signals, and in order to output the narrowband signals in the wideband signal, Narrowband signals-specific filters are needed.

In this case, when filtering the wideband signal through the filters and outputting the narrowband signals, the number of filters increases, the complexity of the system increases, and the number of filtering is performed by filtering the wideband signal through respective filters. There is a problem that increases the performance of the system is increased. In particular, as the difference between the sampling frequency of the wideband signal and the sampling frequency of the narrowband signal increases, the complexity and performance degradation of the system become more severe as the number of filters and the number of filtering increases.

Accordingly, there is a need for a communication system, a method of generating a plurality of narrowband signals from a signal transmitted and received over a wideband through a limited frequency band, that is, a signal generation method of outputting the wideband signal as the narrowband signals.

Accordingly, an object of the present invention is to provide a signal generating apparatus and method in a communication system.

In addition, another object of the present invention is to provide a signal generating apparatus and method for outputting a signal that is transmitted and received over a wide band through a limited frequency band in a communication system as a plurality of narrowband signals.

It is still another object of the present invention to provide a signal generating apparatus and method for outputting a wideband signal into a plurality of narrowband signals using a filter bank in a communication system.

In accordance with another aspect of the present invention, there is provided a signal generation device in a communication system, the apparatus comprising: a buffer for buffering a wideband signal to extract data in a time domain; A Fast Fourier Transform block for performing Fast Fourier Transform (FFT) after multiplying the data in the time domain by a window function; A common weight mask unit to apply a common weight mask by multiplying the fast Fourier transformed data by a common weight mask pattern; And a weighted adder bank for generating a plurality of narrowband signals by multiplying the data to which the common weight mask is applied by a weight pattern.

According to another aspect of the present invention, there is provided a signal generation device in a communication system, comprising: a buffer for buffering a wideband signal to extract data in a time domain; A Fast Fourier Transform block for performing Fast Fourier Transform (FFT) after multiplying the data in the time domain by a window function; And a weighted adder bank for generating a plurality of narrowband signals by multiplying the fast Fourier transformed data by a weighting pattern including a common weighting mask pattern.

According to an aspect of the present invention, there is provided a method of generating a signal in a communication system, comprising: buffering a wideband signal to extract data in a time domain; Performing Fast Fourier Transform (FFT) after multiplying the data in the time domain by a window function; And generating a plurality of narrowband signals by multiplying the fast Fourier transformed data by a weight pattern.

The present invention outputs a signal that is transmitted and received in a wideband through a limited frequency band in a communication system to a plurality of narrowband signals using a filter bank, thereby filtering the wideband signal into the narrowband signals. Minimize the increase in the number of filters and the number of filtering, thereby minimizing the complexity and performance degradation of the system, and also can provide a variety of services to the user to the user normally.

1 is a diagram illustrating a response characteristic of a filter bank in a communication system according to an exemplary embodiment of the present invention.
2 to 4 schematically illustrate a signal generating apparatus in a communication system according to an embodiment of the present invention.
5 is a view schematically illustrating a signal generation process of a signal generation device in a communication system according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

The present invention proposes an apparatus and method for generating a signal in a communication system. Here, an embodiment of the present invention proposes a signal generating apparatus and method for outputting a signal transmitted and received over a wide band through a frequency band as a plurality of narrowband signals in a communication system.

In addition, in an embodiment of the present invention, in a communication system, a filter bank is normally provided to provide users of various quality of service (QoS) services through a limited frequency band. An apparatus and method are provided for generating a plurality of narrowband signals from a wideband signal through a filter bank. Here, in the communication system according to an exemplary embodiment of the present invention, narrowband signals including data corresponding to a service to be provided by the users are generated from the wideband signal by using the filter bank.

That is, in the communication system according to an exemplary embodiment of the present invention, the wideband signal is filtered through the filter bank to generate the narrowband signals from the wideband signal, thereby providing various services normally provided by users. . In this case, as described above, in the communication system, as the wideband signal is filtered through the filter bank to the narrowband signals, an increase in the number of filters and an increase in the number of filtering for the filtering are minimized. Increasing complexity and minimizing performance degradation. Next, the filter bank in the communication system according to an exemplary embodiment of the present invention will be described in more detail with reference to FIG. 1.

1 is a diagram illustrating a response characteristic of a filter bank in a communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 1, in the communication system, the filter bank filters a wideband signal into a plurality of narrowband signals, for example, dividing the entire frequency band of the wideband signal into M frequency bands 102, 104, 106, 108, 110, and 112. The wideband signal is filtered and output into M narrowband signals corresponding to the M frequency bands 102, 104, 106, 108, 110, and 112, respectively. That is, the communication system generates the M narrowband signals from the wideband signal through the filter bank. Next, a signal generating apparatus for generating narrowband signals from a wideband signal through a filter bank in the communication system according to an embodiment of the present invention will be described in more detail with reference to FIGS. 2 to 4.

First, FIG. 2 is a diagram schematically illustrating a signal generating apparatus in a communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 2, as described above, the apparatus for generating a signal filters a wideband signal transmitted and received in a wideband through a limited frequency band to generate a plurality of narrowband signals, for example, M narrowband signals. 200. Here, the filter bank 200 may filter the wideband signal by M frequency bands, that is, the first bandpass filter 210 to the Mth bandpass that respectively filter the wideband signal to the M narrowband signals. A first decimator extracting data corresponding to M frequency bands from a sample of the filtered M narrowband signals and outputting narrowband signals including data corresponding to a service, respectively. (230) to the M decimator 240.

In the filter bank 200, the first bandpass filter 210 to the Mth bandpass filter 220 may be a finite impulse response (FIR) filter or an infinite impulse response (IIR) filter, and FIG. 1. As described above, the wideband signal is filtered for M frequency bands. In addition, the first decimator 230 to the M-decimator 240 may be configured to include a plurality of samples of the M narrowband signals filtered through the first bandpass filter 210 to the Mth bandpass filter 220. At regular time intervals, data corresponding to a service to be provided by the user is extracted for each of the M frequency bands, and at this time, the sampling frequency of the data is converted by discarding the remaining data except for the extracted data.

As shown in FIG. 2, when the filter bank 200 includes the first bandpass filter 210 to the Mth bandpass filter 220, the complexity and performance of the system increase according to the number of filters. Deterioration may occur. Next, the signal generating apparatus for minimizing the increase in complexity and performance degradation of the system will be described in more detail with reference to FIG. 3.

3 is a diagram schematically illustrating an apparatus for generating a signal in a communication system according to another exemplary embodiment of the present disclosure.

Referring to FIG. 3, as described above, the apparatus for generating a signal filters a wideband signal transmitted and received in a wideband through a limited frequency band to generate a plurality of narrowband signals, for example, M narrowband signals. 300. The filter bank 300 may include a buffer 310 for buffering the wideband signal, and an FFT block for fast Fourier transform (FFT) for the buffered wideband signal. 320, a common weight mask unit 330 for applying a weight mask to the FFT data in common, and a weighted adder bank 340 for setting and adding a weight pattern to the data to which the weight mask is applied.

)를 선입선출(FIFO: First In First Out, 이하 'FIFO'라 칭하기로 함) 방식으로 저장한다.In more detail, in the filter bank 300, the buffer 310 may sequentially input wideband signals, that is, data in a wideband time domain.

) Is stored in a first-in, first-out (FIFO) manner.

)으로 상기 버퍼(310)에 저장된 데이터를 리드(read)한 후, 상기 리드한 데이터, 즉 입력 데이터에 윈도우 함수를 곱한 후, FFT를 수행한다. 여기서, 상기 입력 데이터(

)는 하기 수학식 1과 같이 나타낼 수 있으며, 상기 FFT 블럭(320)을 통해 FFT된 데이터(

)는 하기 수학식 2와 같이 나타낼 수 있다.In addition, the FFT block 320 is a constant sample interval (

After reading the data stored in the buffer 310, multiply the read data, that is, the input data by a window function, and perform an FFT. Here, the input data (

) May be expressed as Equation 1 below, and data FFT through the FFT block 320

) Can be expressed as in Equation 2 below.

은 주파수들 간, 다시 말해 M개의 주파수 대역들 간의 간섭을 최소화하기 위한 윈도우 함수를 의미하며, 여기서 상기 FFT 블럭(320)은 상기 윈도우 함수로, 해밍(hamming) 윈도우 함수, 해닝(hanning) 윈도우 함수, 및 블랙만(Blackman) 윈도우 함수 등의 함수를 사용한다. 이때, 상기 FFT 블럭(320)이 일 예로 길이가 N인 해닝 윈도우 함수를 사용할 경우, 상기 수학식 2에서 윈도우 함수

은 하기 수학식 3과 같이 나타낼 수 있다.In Equation 2,

Denotes a window function for minimizing interference between frequencies, that is, between M frequency bands, wherein the FFT block 320 is the window function, a hamming window function, and a hanning window function. Use functions such as,, and Blackman window functions. In this case, when the FFT block 320 uses a Hanning window function of length N as an example, the window function in Equation 2

Can be expressed as Equation 3 below.

)에 적용되며, 상기 주파수 간섭의 고려가 불필요할 경우에는, 상기 윈도우 함수는

로 설정된다.Here, the window function, as described above, in order to minimize the frequency interference in the M frequency bands when the FFT block 320 performs the FFT the input data (

If the consideration of the frequency interference is unnecessary, the window function

Is set to.

)의 주파수 값들에 특정 패턴, 다시 말해 공통 가중치 마스크 패턴

을 곱한다. 여기서, 상기 공통 가중치 마스크부(330)에서 공통 가중치 마스크 패턴

이 곱해진 데이터, 즉 상기 FFT된 데이터(

)에 공통 가중치 마스크가 적용된 데이터(

)는 하기 수학식 4와 같이 나타낼 수 있다.The common weight mask unit 330 may include the FFT data output from the FFT block 320.

A specific pattern, i.e. a common weight mask pattern

Multiply by Here, the common weight mask pattern in the common weight mask unit 330

Is multiplied by, i.e., the FFT data (

Data with a common weight mask

) Can be expressed as Equation 4 below.

은, 전술한 바와 같이, 상기 공통 가중치 마스크 패턴으로, 상기 FFT된 데이터의 주파수 값들 공통적으로 곱해지며, 특히 상기 공통 가중치 마스크 패턴은, 상기 M개의 주파수 대역들에 해당하는 상기 FFT된 데이터의 주파수 대역들에 관계없이 공통적으로 곱해진다. 여기서, 상기 공통 가중치 마스크 패턴

은, 상기 FFT된 데이터(

)의 주파수가 변경됨에 따라 가중치의 크기가 일정하고 부호가 교대로 변경되며, 그에 따라 상기 공통 가중치 마스크 패턴

은

으로 설정될 수도 있다.In Equation 4,

As described above, the common weight mask pattern is commonly multiplied by frequency values of the FFT data, and in particular, the common weight mask pattern is a frequency band of the FFT data corresponding to the M frequency bands. They are multiplied in common. Here, the common weight mask pattern

Is the FFT data (

As the frequency of) changes, the magnitude of the weight is constant and the sign is alternately changed, and accordingly, the common weight mask pattern

silver

May be set.

)에서 사용자가 제공받고자 하는 서비스에 해당하는 데이터를 추출, 즉 상기 M개의 주파수 대역들에 각각 해당하는 데이터로 M개의 협대역 신호들을 각각 생성하여 출력한다. 여기서, 상기 가중 합산기 뱅크(340)에서 출력되는 신호, 즉 상기 제1가중 합산기(342), 및 제2가중 합산기(344) 내지 제M가중 합산기(346)가 출력하는 상기 M개의 협대역 신호들은 하기 수학식 5와 같이 나타낼 수 있다.In addition, the weighted summer bank 340 may include M weighted summers corresponding to the M frequency bands, that is, a first weighted summer 342 and a second weighted summer 344 to 340. M-th weight adder 346 is included. Here, the first weighted summer 342 and the second weighted summer 344 to the Mth weighted summer 346 may include data to which a common weight mask is applied.

) Extracts data corresponding to a service to be provided by the user, that is, generates and outputs M narrowband signals with data corresponding to the M frequency bands, respectively. Here, the M signals output from the weighted summer bank 340, that is, the first weighted summer 342 and the second weighted summer 344 to the Mth weighted summer 346, are output. The narrowband signals may be represented as in Equation 5 below.

는 M개의 주파수 대역에서 임의의 i번째 주파수 대역의 협대역 신호의 k번째 샘플을 의미하며,

는, 공통 가중치 마스크가 적용된 데이터(

)에서 상기 i번째 주파수 대역의 협대역 신호를 필터링하기 위한 가중치 패턴을 의미한다. 여기서, 상기 가중치 패턴(

)은, 다양한 방식으로 결정될 수 있으며, 특히 다른 주파수 대역의 협대역 신호에 대한 가중치 패턴보다 상기 필터링하고자 하는 주파수 대역의 협대역 신호, 즉 상기 i번째 주파수 대역의 협대역 신호에서 큰 값을 갖도록 설정된다. 예컨대, 상기 가중치 패턴(

)은, 하기 수학식 6에 나타낸 바와 같이, 상기 필터링하고자 하는 주파수 대역의 협대역 신호에 대해서는 1로 설정되고, 다른 주파수 대역의 협대역 신호에 대해서는 0으로 설정된다.In Equation 5,

Denotes the k th sample of the narrowband signal of any i th frequency band in M frequency bands,

Is the data to which the common weight mask is applied (

) Denotes a weighting pattern for filtering the narrowband signal of the i-th frequency band. Here, the weight pattern (

) May be determined in various ways, and in particular, is set to have a larger value in the narrowband signal of the frequency band to be filtered, that is, the narrowband signal of the i-th frequency band, than the weighting pattern for the narrowband signal of another frequency band. do. For example, the weight pattern (

) Is set to 1 for narrowband signals in the frequency band to be filtered and set to 0 for narrowband signals in other frequency bands as shown in Equation 6 below.

는, 상기 FFT 블럭(320)에서 상기 FFT된 데이터(

)의 주파수가 N개일 경우, 상기 N개의 주파수들에서 필터의 통과대역에 포함시키고자 하는 주파수 번호를 원소로 하는 집합을 의미한다. 즉, 상기

는, 상기 FFT된 데이터(

)의 주파수에 따라, N개의 공통 가중치 마스크가 적용된 데이터(

)에서, 상기 가중 합산기 뱅크(340)가 필터링하여 생성하고자 하는 M개의 협대역 신호들의 집합에 대응된다.In Equation 6,

In the FFT block 320, the FFT data (

When N) is N, it means a set having as an element a frequency number to be included in the passband of the filter at the N frequencies. That is

Is the FFT data (

Data with N common weight masks (

), The weight adder bank 340 corresponds to a set of M narrowband signals to be generated by filtering.

)에서, 사용자가 제공받고자 하는 서비스에 해당하는 데이터에 상응하는 값들만을 모두 합산하여, 상기 M개의 주파수 대역들에 각각 해당하는 데이터로 M개의 협대역 신호들을 각각 생성한다. 그러면 여기서, 도 4를 참조하여 본 발명의 또 다른 실시 예에 따른 통신 시스템에서 신호 생성 장치에 대해서 보다 구체적으로 설명하기로 한다.Therefore, in the weighted summer bank 340, the first weighted summer 342 and the second weighted summer 344 to the Mth weighted summer 346 are applied with the N common weight masks. (

), Only the values corresponding to the data corresponding to the service to be provided by the user are added together to generate M narrowband signals with data corresponding to the M frequency bands, respectively. Next, a signal generating apparatus in a communication system according to another exemplary embodiment of the present invention will be described in more detail with reference to FIG. 4.

4 is a diagram schematically illustrating an apparatus for generating a signal in a communication system according to another exemplary embodiment of the present invention.

Referring to FIG. 4, as described above, the apparatus for generating a signal filters a wideband signal transmitted and received in a wideband through a limited frequency band to generate a plurality of narrowband signals, for example, M narrowband signals. 400. The filter bank 400 may include a buffer 410 for buffering the wideband signal, an FFT block 420 for FFTing the buffered wideband signal, and a weighted adder for setting and summing weight patterns to the FFT data. Bank 430. Here, since the above-described button 410 and the FFT block 420 have been described in detail with reference to FIG. 3, detailed description thereof will be omitted herein.

)을 가중치 패턴(

)에 포함시키며, 상기 FFT 블럭(420)에서 출력되는 FFT된 데이터(

)에, 상기 공통 가중치 마스크 패턴(

)가 포함된 가중치 패턴(

)을 곱하여 상기 M개의 협대역 신호들을 생성한다.In the filter bank 400, the weighted adder bank 430, like the weighted adder bank 340 described with reference to FIG. 3, has M weighted adders corresponding to the M frequency bands, respectively. In other words, the first weight adder 432 and the second weight adder 434 to the M-th weight adder 436. Here, the first weighted summer 432 and the second weighted summer 434 through the Mth weighted summer 436 are the common weight mask patterns in the common weight mask unit 330 of FIG. 3. (

) To the weighting pattern (

FFT data output from the FFT block 420

), The common weight mask pattern (

) Weighted pattern with

Multiply by) to produce the M narrowband signals.

)가 포함된 가중치 패턴(

)은, 하기 수학식 7과 같이 나타낼 수 있다. 여기서, 상기 FFT된 데이터(

)에 공통 가중치 마스크 패턴(

) 및 가중치 패턴(

)를 곱함에 대해서는 앞선 도 3에서 보다 구체적으로 설명하였으므로 여기서는 그에 관한 구체적인 설명을 생략하기로 한다.The common weight mask pattern (

) Weighted pattern with

) Can be expressed as in Equation 7 below. Here, the FFT data (

) For the common weight mask pattern (

) And weighting pattern (

Since multiplication is described in more detail in FIG. 3, a detailed description thereof will be omitted herein.

)에서, 사용자가 제공받고자 하는 서비스에 해당하는 데이터에 상응하는 값들만을 모두 합산하여, 상기 M개의 주파수 대역들에 각각 해당하는 데이터로 M개의 협대역 신호들을 각각 생성한다. 그러면 여기서, 도 5를 참조하여 본 발명의 실시 예에 따른 통신 시스템에서 필터 뱅크를 통해 광대역 신호로부터 복수의 협대역 신호들을 생성하는 동작에 대해서 보다 구체적으로 설명하기로 한다.Therefore, in the weighted summer bank 430, the first weighted summer 432, and the second weighted summer 434 to the Mth weighted summer 436, the N FFT data (

), Only the values corresponding to the data corresponding to the service to be provided by the user are added together to generate M narrowband signals with data corresponding to the M frequency bands, respectively. Next, an operation of generating a plurality of narrowband signals from the wideband signal through the filter bank in the communication system according to an exemplary embodiment of the present invention will be described in detail with reference to FIG. 5.

5 is a diagram schematically illustrating a signal generation process of a signal generation device in a communication system according to an embodiment of the present invention.

Referring to FIG. 5, in step 510, the signal generation device buffers a wideband signal transmitted and received over a wideband through a limited frequency band and extracts data in a wideband time domain. Here, N time domain signal samples are extracted through the buffering.

In operation 520, the FFT is performed on the data in the wideband time domain. In other words, the FFT is performed after multiplying the N time domain signal samples by a window function.

Then, in step 530, a common weight mask is applied to the FFT data, that is, multiplied by the FFT N time-domain signal samples common weight mask pattern, and in step 540, in the data to which the common weight mask is applied, Only the values corresponding to the data corresponding to the service corresponding to the service to be provided by the user are summed up, that is, multiplied by the weighted pattern by the data multiplied by the common weight mask pattern, and the M narrowed data corresponding to the M frequency bands, respectively. Generate band signals respectively. Here, the M narrowband signals may be generated by multiplying the FFT data, that is, the FFT N time-domain signal samples by a weight pattern including the common weight mask pattern.

As described above, in the communication system according to an exemplary embodiment of the present invention, as described above, a plurality of narrowband signals are generated by filtering a wideband signal through a filter bank, that is, users are provided from the wideband signal using the filter bank. Narrowband signals, each containing data corresponding to the service, are extracted and output, respectively, thereby minimizing system complexity and performance degradation according to the number of filters and the number of filters, thereby minimizing performance degradation. Give it normally.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

Claims (20)

A signal generating apparatus in a communication system,
A buffer for buffering a wideband signal to extract data in a time domain;
A Fast Fourier Transform block for performing Fast Fourier Transform (FFT) after multiplying the data in the time domain by a window function;
A common weight mask unit to apply a common weight mask by multiplying the fast Fourier transformed data by a common weight mask pattern; And
A weighted adder bank for generating a plurality of narrowband signals by multiplying the data to which the common weight mask is applied by a weight pattern.
Including,
The weight pattern is,
In the data to which the common weight mask is applied, a value in a frequency band of the corresponding data has a value greater than a value in another frequency band so that only data corresponding to each of the narrowband signals is filtered. Signal generator.
The method of claim 1,
And wherein the common weight mask unit multiplies the common weight mask pattern by frequency values of the fast Fourier transformed data.
The method of claim 2,
The common weight mask pattern is a signal generation device, characterized in that the magnitude is constant and the sign is alternatingly corresponding to the frequency change of the fast Fourier transformed data.
delete The method of claim 1,
And the weighting pattern is set to 1 in a frequency band of the corresponding data and to 0 in another frequency band.
The method of claim 1,
The weighted adder bank may include a plurality of weighted adders each of which adds only data corresponding to the narrowband signals from the data to which the common weight mask is applied, and outputs the narrowband signals, respectively. Signal generator.
The method of claim 1,
The fast Fourier transform block reads data in the time domain at regular sample intervals and multiplies the window function.
A signal generating apparatus in a communication system,
A buffer for buffering a wideband signal to extract data in a time domain;
A Fast Fourier Transform block for performing Fast Fourier Transform (FFT) after multiplying the data in the time domain by a window function; And
A weighted adder bank for generating a plurality of narrowband signals by multiplying the fast Fourier transformed data by a weighting pattern including a common weighting mask pattern.
Including,
The weight pattern is,
In the fast Fourier transformed data, a value in a frequency band of the corresponding data has a value greater than a value in another frequency band such that only data corresponding to each of the narrowband signals is filtered. Generating device.
delete The method of claim 8,
The weight pattern is set to 1 in the frequency band of the corresponding data, 0 in the other frequency band, and the signal is characterized in that the sign is alternately changed in accordance with the frequency change of the fast Fourier transformed data Generating device.
The method of claim 8,
The weighted adder bank includes a plurality of weighted adders each of which outputs the narrowband signals by summing only data corresponding to the narrowband signals from the fast Fourier transformed data. Generating device.
In the signal generation method in a communication system,
Buffering the wideband signal to extract data in the time domain;
Performing Fast Fourier Transform (FFT) after multiplying the data in the time domain by a window function; And
Generating a plurality of narrowband signals by multiplying the fast Fourier transformed data by a weight pattern
Including,
Generating the narrowband signals,
In the fast Fourier transformed data, a value in a frequency band of the corresponding data has a value greater than a value in another frequency band such that only data corresponding to each of the narrowband signals is filtered. How to produce.
delete The method of claim 12,
The weight pattern is set to 1 in the frequency band of the corresponding data, 0 in the other frequency band, and the signal is characterized in that the sign is alternately changed in accordance with the frequency change of the fast Fourier transformed data Produce method.
The method of claim 12,
The generating of the narrowband signals may include generating the narrowband signals by summing only data corresponding to the narrowband signals from the fast Fourier transformed data.
The method of claim 12,
And multiplying common frequency mask patterns by frequency values of the fast Fourier-transformed data to apply a common weight mask.
The method of claim 16,
The common weight mask pattern is a signal generation method, characterized in that the magnitude is constant and the sign is alternatingly corresponding to the frequency change of the fast Fourier transformed data.
The method of claim 16,
The weight pattern is,
In the data to which the common weight mask is applied, a value in a frequency band of the corresponding data has a value greater than a value in another frequency band so that only data corresponding to each of the narrowband signals is filtered. Signal generation method.
The method of claim 18,
The weighting pattern is set to 1 in the frequency band of the corresponding data, and is set to 0 in the other frequency band.
The method of claim 18,
The generating of the narrowband signals may include generating the narrowband signals by summing only data corresponding to the narrowband signals from the data to which the common weight mask is applied.

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