KR20120003707A - Apparatus and method for transmission additional data using padding and removes of additional data - Google Patents

Abstract

PURPOSE: An apparatus for transceiving additional data using padding and removing of an additional data is provided to transmit an additional data or a modulated signal of the additional data through a padding about a current broadcast and communication system frame and removes the padded additional data before demodulating a main data. CONSTITUTION: A first modulation unit(314) modulates an additional data. A second modulator(312) modulates a main data through a different modulation method. A padding unit(318) pads the modulated additional data to the modulated main data. A scaling unit(316) adjusts the amplitude size of the modulated additional data to a preset scale.

Description

Apparatus and method for transmitting and receiving additional data at high speed using padding and removal of additional data {APPARATUS AND METHOD FOR TRANSMISSION ADDITIONAL DATA USING PADDING AND REMOVES OF ADDITIONAL DATA}

Embodiments of the present invention relate to an apparatus and method for transmitting and receiving additional data at high speed, and more particularly, to an apparatus and method for transmitting and receiving additional data at high speed by padding and transmitting additional data and removing the padded additional data.

Currently, broadcasting and communication technologies are evolving in various media forms. Against this backdrop, ATSC type DTV using single carrier and DVB type DTV using multi carrier have emerged. And with the development of terminal technology, ATSC and DVB methods for mobile broadcasting have been redefined. In addition, a mobile wireless Internet service (WiBro) capable of high-speed communication using multicarriers has been implemented.

Broadcasting and communication are evolving in various forms, fusing each other's barriers. However, frequency resources are extremely scarce. In order to solve the problem of frequency shortage and efficiently use the frequency, underlay ultra wideband (Ultra wideband) and overlay cognitive radio (Cognitive Radio) is actively being studied. Therefore, there is a demand for a technique for maximizing transmission capacity in a given band.

The conventional technique of watermarking a broadcast transmission signal has been used for the purpose of identifying a broadcast transmitter and at the same time improving the additional data rate.

The conventional additional data transmission technique transmits secondary data by using a watermarking long code after amplitude modulation or phase modulation of the additional data as a primary modulation in a transmission apparatus. Then, the reception apparatus prepared a reference signal for the long code and correlated the data to restore additional data. The conventional additional data transmission technology is not only limited to the 8VSB based ATSC scheme, but also the transmission capacity of the additional data information is several kbps or less, which makes it difficult to transmit text information.

An embodiment of the present invention provides an apparatus and method for transmitting and receiving additional data at high speed by using padding and removal of the additional data.

According to an embodiment of the present invention, a frame of an existing broadcast and communication system (eg, VSB (Vestigial Side Band) based broadcast system or OFDM (Orthogonal Frequency Division Multiplexing) Padding is transmitted to a broadcast based communication system or a frame of an SS (Spread Spectrum) and a CDMA (Code Division Multiple Access) based communication system) and transmitted from the receiving device. By removing the padded additional data before demodulation, it is possible to share additional frequencies for transmission by additionally transmitting and receiving additional data with little effect on the data recovery performance of the padded system. Provides a new device and method.

The present invention provides an apparatus and method for transmitting and receiving additional data at high speed by padding and transmitting additional data modulated by a modulation method different from the main data in the transmitting apparatus and removing the additional data from the receiving apparatus.

According to an embodiment of the present invention, a transmission apparatus for transmitting additional data at high speed includes a first modulator for modulating additional data, a second modulator for modulating main data using a modulation scheme different from that of the first modulator, and And a padding unit configured to pad the modulated main data with modulated main data.

According to an embodiment of the present invention, a receiving apparatus for receiving additional data at high speed may include: a padding detector extracting modulated additional data of a predetermined modulation method from the padded data using characteristics of a modulation method; And a padding remover configured to remove modulated additional data to extract modulated main data.

According to an embodiment of the present invention, a transmission apparatus for transmitting additional data at high speed includes a mapping unit for selecting a spreading code corresponding to the additional data in a spreading code set, and adjusting the amplitude of the selected spreading code to a preset size. And a padding unit for padding the spreading code whose amplitude is adjusted to the scaling unit and the modulated main data.

According to an embodiment of the present invention, a receiving apparatus for receiving additional data at high speed includes: a matching filter unit configured to inversely convert padded data into a matching filter to calculate a correlation characteristic peak value, and to identify a spreading code corresponding to the correlation characteristic peak value. And a padding removal unit configured to extract the main data by removing the identified spreading code from the padded data.

According to an embodiment of the present invention, a transmission method for transmitting additional data at high speed includes: modulating main data, modulating the additional data by a modulation method different from the modulation method by which the main data is modulated, and Adjusting the amplitude magnitude of the additional data to a preset magnitude and padding the modulated additional data whose amplitude magnitude is adjusted to the modulated main data.

According to an embodiment of the present invention, a reception method for receiving additional data at high speed may include extracting additional data modulated by a predetermined modulation method from the padded data by using characteristics of a modulation method; Adjusting the amplitude magnitude of the modulated additional data to a preset amplitude magnitude corresponding to the received intensity, and extracting the modulated main data by removing the modulated additional data whose amplitude is adjusted from the padded data. And demodulating the modulated additional data to output additional data.

According to an embodiment of the present invention, a transmission method for transmitting additional data at high speed includes selecting a spreading code corresponding to the additional data in a spreading code set, and adjusting an amplitude size of the selected spreading code to a predetermined size. And padding the spreading code whose amplitude is adjusted to the modulated main data.

A reception method for receiving additional data at high speed according to an embodiment of the present invention includes the steps of receiving padded data, converting the padded data into a matched filter to calculate a correlation characteristic peak value, and the correlation characteristic. Identifying a spreading code corresponding to a peak value, adjusting an amplitude magnitude of the identified spreading code to a predetermined amplitude magnitude corresponding to a magnitude of a correlation characteristic peak, and adjusting the amplitude magnitude in the padded data Removing the identified spreading code and extracting main data; and outputting predetermined data corresponding to the confirmed spreading code as additional data.

The present invention pads and transmits the additional data or modulated signal of the additional data generated by the transmitting apparatus to a frame of an existing broadcasting and communication system, and before demodulating the main data which is the data of the padded system in the receiving apparatus. The present invention relates to a new apparatus and method for sharing the frequency required for transmission by additionally transmitting and receiving additional data without substantially affecting the data recovery performance of the padded system by removing the padded additional data portion in advance. Additional data transmission capacity can be increased without using additional resources (frequency, time, code, etc.).

1 is a diagram illustrating a configuration of a transmitter for padding and transmitting additional data according to an embodiment of the present invention;
2 is a diagram illustrating a configuration of a receiving apparatus for receiving padded data according to an embodiment of the present invention;
3 is a diagram illustrating a configuration of a transmitter for padding and transmitting additional data according to another embodiment of the present invention;
4 is a diagram illustrating a configuration of a receiving apparatus for receiving padded data according to another embodiment of the present invention;
5 is a flowchart illustrating a process of padding and transmitting additional data according to an embodiment of the present invention;
6 is a flowchart illustrating a process of receiving padded data according to an embodiment of the present invention;
7 is a flowchart illustrating a process of padding and transmitting additional data according to another embodiment of the present invention;
8 is a flowchart illustrating a process of receiving padded data according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to an apparatus and method for transmitting and receiving additional data at high speed by padding and transmitting additional data in a transmitting apparatus and removing the additional data in a receiving apparatus.

First, a transmitter for padding additional data using a spreading code and a receiver for removing padded additional data will be described below with reference to FIGS. 1 and 2.

1 is a diagram illustrating a configuration of a transmitter for padding and transmitting additional data according to an embodiment of the present invention.

Referring to FIG. 1, a transmission apparatus for transmitting additional data at high speed includes a coder 110, a modulator 112, a mapping unit 114, a scaling unit 116, a padding unit 118, and a digital / analog converter. (DAC) 120 and RF processing unit 112 are included.

The encoder 110 encodes input main data at a corresponding code rate and outputs coded bits or symbols. In this case, the main data may be broadcast data.

The modulator 112 modulates the encoded main data received from the coder 110 and outputs the modulated main data. The modulator 112 performs OFDM modulation if the transmitter is a T-DMB broadcast apparatus.

The modulator 112 may be one of modulation schemes based on VSB (Vestigial Side Band), Orthogonal Frequency Division Multiplexing (OFDM), Spread Spectrum (SS), or Code Division Multiple Access (CDMA) based on an OFDM communication system. Modulation may also be performed.

The mapping unit 114 receives additional data having a predetermined size and selects a spreading code corresponding to the additional data from a preset spreading code set. Types of spreading codes may include a Zero Correlation Duration (ZCD) code and a Low Correlation Duration (LCD) code. The additional data may include identification information of the transmitting apparatus, disaster information, traffic information, geographic information, and the like.

The mapping unit 114 may use different spreading code sets according to the channel state in consideration of the channel state. In this case, before the spreading code is selected, the mapping unit 114 may first select a spreading code set corresponding to a channel state from a set of spreading code sets consisting of a plurality of spreading code sets.

The scaling unit 116 adjusts the amplitude size of the selected spreading code to a preset size in order to increase the transmission sensitivity in the receiving device. At this time, the preset magnitude is set such that the amplitude magnitude of the padded data generated by padding the spreading code whose amplitude magnitude is adjusted to the modulated main data is lower than the reference power allowed by the transmitter and the receiver. The present invention does not affect the original signal because the receiving device removes the padded signal before the original signal demodulation. Thus, the amplitude magnitude of the padded signal can be made large as the power of the transmitting device and the receiving device is allowed.

The padding unit 118 outputs the padded data by padding the spreading code whose amplitude is adjusted to the modulated main data.

The digital / analog converter (DAC) 120 converts the padded data into an analog signal and outputs the analog signal. The RF processor 112 includes components such as a filter and a front end unit. The RF processor 112 performs an RF process to actually transmit a signal output from the DAC 120 and transmits the signal through a Tx antenna. Transmit to wireless channel.

2 is a diagram illustrating a configuration of a receiving apparatus for receiving padded data according to an embodiment of the present invention.

Referring to FIG. 2, a receiving apparatus for receiving additional data at high speed includes an RF processor 210, an analog / digital converter (ADC) 212, a distributor 214, a matched filter 216, and a padding detector 218. , A demapping unit 220, a scaling unit 222, a padding remover 224, a demodulator 226, and a decoder 228.

The RF processor 210 includes components such as a front end unit and a filter, and converts the padded data of the high frequency band that has passed through the radio channel into the padded data of the baseband.

The analog / digital converter (ADC) 212 converts the baseband padded data of the analog behavior from the RF processor 210 into digital padded data and outputs the converted padded data.

The distribution unit 214 outputs the padded data from the ADC 212 to the matched filter unit 216 and the padding remover 224.

The matched filter unit 216 despreads the padded data from the distribution unit 214 with the matched filter to calculate a correlation characteristic peak value.

The padding detector 218 checks the spreading code corresponding to the correlation characteristic peak value.

On the other hand, when the transmitting apparatus uses the variable spreading code set, the matching filter unit 216 includes a plurality of preset matching filters according to channel conditions, and calculates correlation characteristic peak values by inversely converting the padded data for each matching filter. do. The padding detector 218 identifies the spreading code corresponding to the largest correlation characteristic peak value among the correlation characteristic peak values calculated by the matched filter unit 216.

The demapping unit 220 outputs predetermined data corresponding to the confirmed spreading code as additional data.

The scaling unit 222 adjusts the amplitude magnitude of the spreading code identified to the predetermined amplitude magnitude corresponding to the magnitude of the correlation characteristic peak.

The padding remover 224 extracts the modulated main data by removing the identified spreading code whose amplitude magnitude from the scaling unit 222 is adjusted from the padded data.

The demodulator 226 demodulates the modulated main data from the padding remover 224 and outputs the encoded main data.

The decoder 228 decodes the encoded main data from the demodulator 226 and outputs the main data.

The receiving apparatus of FIG. 2 extracts the spreading code corresponding to the additional data and removes it from the padding data. Alternatively, the receiving apparatus may extract the modulated main data from the padded data and remove the modulated main data from the padded data to extract additional data.

Next, a transmitter for padding the additional data modulated by a modulation method different from the main data and a receiver for removing the padded additional data will be described below with reference to FIGS. 3 and 4.

3 is a diagram illustrating a configuration of a transmitter for padding and transmitting additional data according to another embodiment of the present invention.

Referring to FIG. 3, a transmission apparatus for transmitting additional data at high speed includes a second coder 310, a second modulator 312, a first coder 313, a first modulator 314, and a scaling unit ( 316, a padding unit 318, a digital-to-analog converter (DAC) 320, and an RF processor 312.

The second coder 310 encodes input main data at a corresponding code rate and outputs coded main data (coded bits or symbols). In this case, the main data may be broadcast data.

The second modulator 312 modulates the encoded main data received from the second coder 310 and outputs modulated main data. In this case, the second modulator 312 may modulate using one of modulation schemes based on a vertical side band (VSB), orthogonal frequency division multiplexing (OFDM), spread spectrum (SS), or code division multiple access (CDMA). It may be.

The first coder 313 encodes the input additional data at a corresponding code rate and outputs the encoded additional data.

The first modulator 314 modulates the coded additional data received from the first coder 313 to output the modulated additional data.

In this case, the first modulator 314 and the second modulator modulate using different modulation schemes.

The first modulator 314 may modulate the additional data using at least one of spread modulation, phase modulation, amplitude modulation, or frequency modulation by a spreading code.

Alternatively, the first modulator 314 may use one of modulation schemes such as a vertical side band (VSB), orthogonal frequency division multiplexing (OFDM), spread spectrum (SS), or code division multiple access (CDMA) based modulation. The additional data may be modulated.

The scaling unit 316 adjusts the amplitude size of the modulated additional data to a preset size in order to increase the transmission sensitivity in the receiving device. In this case, the preset size is set such that the amplitude magnitude of the padded data generated by padding the modulated main data with the modulated main data is lower than the reference power allowed by the transmitter and the receiver. The present invention does not affect the original signal because the receiving device removes the padded signal before the original signal demodulation. Thus, the amplitude magnitude of the padded signal can be made large as the power of the transmitting device and the receiving device is allowed.

The padding unit 318 outputs the padded data by padding the modulated additional data whose amplitude is adjusted to the modulated main data.

The digital-to-analog converter (DAC) 320 converts the padded data into an analog signal and outputs the analog signal. The RF processor 312 includes components such as a filter and a front end unit. The RF processor 312 RF-processes a signal output from the DAC 320 to be actually transmitted, and then transmits the signal through a Tx antenna. Transmit to wireless channel.

4 is a diagram illustrating a configuration of a receiving apparatus for receiving padded data according to another embodiment of the present invention.

Referring to FIG. 4, a receiving apparatus for receiving additional data at high speed includes an RF processor 410, an analog / digital converter (ADC) 412, a distributor 414, a padding detector 416, and a second demodulator ( 418, a second decoder 420, a scaling unit 422, a padding remover 424, a second demodulator 426, and a second decoder 428.

The RF processor 410 includes components such as a front end unit, a filter, and the like, and converts the padded data of the high frequency band passing through the radio channel into the padded data of the baseband.

The analog / digital converter (ADC) 412 converts the baseband padded data of the analog behavior from the RF processor 410 into digital padded data and outputs the converted padded data.

The distributor 414 outputs the padded data from the ADC 412 to the padding detector 416 and the padding remover 424.

The padding detector 416 extracts modulated additional data of a preset modulation method from the padded data from the distribution unit 414 by using characteristics of the modulation method, and outputs the modulated additional data.

The first demodulator 418 demodulates the modulated additional data from the padding detector 416 and outputs the encoded additional data.

The first decoder 420 decodes the encoded additional data from the first demodulator 418 and outputs the additional data.

The scaling unit 422 adjusts the amplitude size of the additional data modulated to a predetermined amplitude size corresponding to the reception strength of the padded data.

The padding remover 424 extracts the modulated main data by removing the modulated additional data whose amplitude magnitude from the scaling unit 422 is adjusted from the padded data from the distribution unit 414.

The second demodulator 426 demodulates the modulated main data from the padding remover 424 and outputs the encoded main data.

The second decoder 428 decodes the encoded main data from the second demodulator 426 and outputs the main data.

The receiving apparatus of FIG. 4 first extracts the additional data modulated using the modulation method corresponding to the additional data and removes the additional data from the padding data. Alternatively, the receiving device may extract additional data by first extracting the modulated main data from the padded data and then removing the modulated main data from the padded data.

Hereinafter, a method of transmitting and receiving additional data at high speed by using the padding and removal of the additional data according to the present invention configured as described above will be described with reference to the accompanying drawings.

5 is a flowchart illustrating a process of padding and transmitting additional data according to an embodiment of the present invention.

Referring to FIG. 5, when receiving additional data to be transmitted in step 510, the transmitting apparatus selects a spreading code corresponding to the additional data from a spreading code set in step 512.

In operation 514, the transmitting apparatus adjusts an amplitude size of the selected spreading code to a preset size to increase transmission sensitivity.

In operation 516, the transmitting apparatus pads the spread code whose amplitude is adjusted to the modulated main data, and transmits the padded data to the receiving apparatus in operation 518.

6 is a flowchart illustrating a process of receiving padded data according to an embodiment of the present invention.

Referring to FIG. 6, when the receiving device receives the padded data in step 610, the receiving device converts the padded data to digital in step 612. In operation 614, the receiving apparatus calculates a correlation characteristic peak value by inversely converting the padded data to a matched filter.

In operation 616, the receiving apparatus checks a spreading code corresponding to the correlation peak. In operation 618, the receiving device outputs predetermined data corresponding to the spreading code identified as additional data.

In operation 620, the receiving apparatus adjusts an amplitude size of the spreading code identified as a predetermined amplitude size corresponding to the magnitude of the correlation characteristic peak. In operation 622, the receiving apparatus extracts the modulated main data by removing the identified spreading code whose amplitude is adjusted from the padded data. In operation 624, the receiving apparatus demodulates and decodes the modulated main data and outputs the main data.

7 is a flowchart illustrating a process of padding and transmitting additional data according to another embodiment of the present invention.

Referring to FIG. 7, in operation 710, when a transmission apparatus receives additional data to be transmitted, the transmission apparatus encodes the additional data and modulates the additional data using a predetermined modulation scheme. In this case, the predetermined modulation scheme for modulating the additional data is a modulation scheme different from the modulation scheme for modulating the main data.

In operation 714, the transmitter adjusts an amplitude size of the modulated additional data to a preset size in order to increase transmission sensitivity.

In operation 716, the transmitter apparatus pads the modulated additional data with the modulated main data. In operation 718, the transmitting device transmits the padded data to the receiving device.

8 is a flowchart illustrating a process of receiving padded data according to another embodiment of the present invention.

Referring to FIG. 8, when the receiving device receives the padded data in step 810, the receiving device converts the padded data to digital in step 812.

In operation 814, the receiving apparatus extracts additional data modulated by the predetermined modulation scheme from the padded data by using characteristics of the predetermined modulation scheme.

In operation 816, the receiving apparatus demodulates and decodes the modulated additional data and outputs the additional data.

In operation 818, the receiving apparatus adjusts an amplitude size of the additional data modulated to a preset amplitude size corresponding to the reception intensity of the padded data. In operation 820, the receiving apparatus extracts the modulated main data by removing the modulated additional data whose amplitude is adjusted from the padded data. In operation 822, the receiving apparatus demodulates and decodes the modulated main data and outputs the main data.

Methods according to an embodiment of the present invention can be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts.

As described above, although the present invention has been described with reference to the limited embodiments and the drawings, the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

210; RF processing unit
212; ADC
214; Distribution
216; Matching filter part
218; Padding detector
220; De-Mapping Section
222; Scaling
224; Padding remover
226; Demodulator
228; Decoders

Claims (26)

A first modulator for modulating additional data;
A second modulator for modulating main data by a modulation scheme different from that of the first modulator; And
And a padding unit configured to pad the modulated additional data to the modulated main data.
Transmission device for transmitting additional data at high speed.
The method of claim 1,
A scaling unit for adjusting the amplitude of the modulated additional data to a predetermined size, further comprising:
The padding unit pads the modulated additional data whose amplitude is adjusted to the modulated main data.
Transmission device for transmitting additional data at high speed.
The method of claim 2,
The predetermined magnitude of the amplitude is
The transmission of the additional data at high speed, characterized in that the amplitude of the padded data generated by padding the modulated main data to the modulated main data is lower than the reference power allowed by the transmitting apparatus and the receiving apparatus. Device.
The method of claim 1,
The first modulator,
Characterized in that the additional data is modulated using at least one of spread modulation, phase modulation, amplitude modulation, or frequency modulation by a spreading code.
Transmission device for transmitting additional data at high speed.
The method of claim 1,
The first modulator,
Modulating the additional data using one of modulation schemes based on a vertical side band (VSB), orthogonal frequency division multiplexing (OFDM), spread spectrum (SS), or code division multiple access (CDMA)
Transmission device for transmitting additional data at high speed.
The method of claim 1,
The second modulator,
Modulating the main data using one of modulation schemes such as VSB (Orthogonal Frequency Division Multiplexing), OFDM (Spread Spectrum) or Code Division Multiple Access (CDMA) based modulation.
Transmission device for transmitting additional data at high speed.
A padding detector configured to extract modulated additional data of a predetermined modulation scheme from the padded data using characteristics of the modulation scheme; And
And a padding remover configured to extract the modulated main data by removing the modulated additional data from the padded data.
A receiving device for receiving additional data at high speed.
The method of claim 7, wherein
The modulated main data is,
Modulated by a modulation scheme different from that of the modulated additional data.
A receiving device for receiving additional data at high speed.
The method of claim 8,
The modulated main data is,
Modulated by one of a modulation scheme based on a vertical side band (VSB), orthogonal frequency division multiplexing (OFDM), spread spectrum (SS), or code division multiple access (CDMA)
A receiving device for receiving additional data at high speed.
The method of claim 7, wherein
The modulated additional data is,
Modulated by at least one of spread modulation, phase modulation, amplitude modulation, or frequency modulation by a spreading code
A receiving device for receiving additional data at high speed.
The method of claim 7, wherein
The modulated additional data is,
Modulated by one of a modulation scheme based on a vertical side band (VSB), orthogonal frequency division multiplexing (OFDM), spread spectrum (SS), or code division multiple access (CDMA)
A receiving device for receiving additional data at high speed.
The method of claim 7, wherein
A scaling unit for adjusting the amplitude of the modulated additional data further comprises:
The padding remover may extract the modulated main data by removing the modulated additional data whose amplitude is adjusted from the padded data.
A receiving device for receiving additional data at high speed.
The method of claim 12,
The scaling unit,
Adjust the amplitude of the modulated additional data to a predetermined amplitude corresponding to the received strength of the padded data.
A receiving device for receiving additional data at high speed.
The method of claim 7, wherein
And a demodulator for demodulating the modulated additional data to output additional data.
A receiving device for receiving additional data at high speed.
A mapping unit for selecting a spreading code corresponding to additional data in a spreading code set;
A scaling unit which adjusts an amplitude magnitude of the selected spreading code to a preset magnitude; And
And a padding unit configured to pad the spreading code whose amplitude is adjusted to modulated main data.
Transmission device for transmitting additional data at high speed.
16. The method of claim 15,
The predetermined magnitude of the amplitude is
Characterized in that the amplitude magnitude of the padded data generated by padding the spreading code whose amplitude magnitude is adjusted to the modulated main data is set to be lower than the reference power allowed by the transmitting device and the receiving device.
Transmission device for transmitting additional data at high speed.
16. The method of claim 15,
The mapping unit,
Selecting the spreading code set corresponding to a channel state from a set of variable spreading code sets consisting of a plurality of spreading code sets
Transmission device for transmitting additional data at high speed.
A matched filter unit for converting the padded data into a matched filter and calculating a correlation characteristic peak value;
A padding detector for identifying a spreading code corresponding to the correlation characteristic peak value; And
And a padding removal unit configured to remove the identified spreading code from the padded data to extract main data.
A receiving device for receiving additional data at high speed.
The method of claim 18,
Further comprising a scaling unit for adjusting the amplitude of the identified spreading code,
The padding removing unit may extract the main data by removing the identified spreading code whose amplitude is adjusted from the padded data.
A receiving device for receiving additional data at high speed.
20. The method of claim 19,
The scaling unit,
And adjusting the amplitude magnitude of the identified spreading code to a predetermined amplitude magnitude corresponding to the magnitude of the correlation characteristic peak.
A receiving device for receiving additional data at high speed.
The method of claim 18,
And a demapping unit for outputting predetermined data corresponding to the identified spreading code as additional data.
A receiving device for receiving additional data at high speed.
The method of claim 18,
The matched filter unit includes a plurality of preset matched filters according to a channel state, and inversely converts the padded data for each matched filter to calculate correlation characteristic peak values,
The padding detector identifies a spreading code corresponding to the largest correlation characteristic peak value among the correlation characteristic peak values.
A receiving device for receiving additional data at high speed.
Modulating main data;
Modulating additional data by a modulation scheme different from the modulation scheme which modulated the main data;
Adjusting an amplitude magnitude of the modulated additional data to a preset magnitude; And
Padding said modulated main data with amplitude modulated to said modulated main data;
Transmission method for transmitting additional data at high speed.
Extracting additional data modulated by a predetermined modulation method from the padded data using characteristics of the modulation method;
Adjusting an amplitude magnitude of the modulated additional data to a preset amplitude magnitude corresponding to the received strength of the padded data;
Extracting the modulated main data by removing the modulated additional data whose amplitude is adjusted from the padded data; And
Demodulating the modulated additional data to output additional data;
A reception method for receiving additional data at high speed.
Selecting a spreading code corresponding to additional data in a spreading code set;
Adjusting an amplitude magnitude of the selected spreading code to a preset magnitude; And
Padding the spreading code whose amplitude is adjusted to modulated main data;
Transmission method for transmitting additional data at high speed.
Receiving padded data;
Calculating correlation peak values by inversely converting the padded data to a matched filter;
Identifying a spreading code corresponding to the correlation characteristic peak value;
Adjusting the amplitude magnitude of the identified spreading code to a predetermined amplitude magnitude corresponding to the magnitude of a correlation characteristic peak;
Extracting main data by removing the identified spreading code whose amplitude is adjusted from the padded data; And
Outputting predetermined data corresponding to the confirmed spreading code as additional data;
A reception method for receiving additional data at high speed.

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