KR101074109B1 - Transmitting device, receiving device, transmitting and receiving method for wireless communication system - Google Patents

Abstract

The present invention relates to a transmitting apparatus, a receiving apparatus, and a transmitting and receiving method of a wireless communication system. A transmitting device according to the present invention is a transmitting device of a wireless communication system using a multi-band, a plurality of transmitting units corresponding to a plurality of subbands, and at least one of the plurality of transmitting units according to a data rate, and selects an input signal It includes a distribution unit for transmitting to the selected transmission unit, each transmission unit converts and outputs the output signal when receiving the output signal from the distribution unit.

UWB, multi band, 64 QAM, Tx, Rx

Description

Transmission device, reception device, and transmission / reception method for a wireless communication system {TRANSMITTING DEVICE, RECEIVING DEVICE, TRANSMITTING AND RECEIVING METHOD FOR WIRELESS COMMUNICATION SYSTEM}

The present invention relates to a transmitting apparatus, a receiving apparatus, and a transmitting and receiving method of a wireless communication system.

The present invention is derived from the research conducted as part of the IT growth engine technology development of the Ministry of Knowledge Economy and the Ministry of Information and Communication Research and Development. [Task management number: 2006-S-071-03, Task name: Development of ultra-high speed multimedia transmission UWB solution].

Wireless communication systems, such as ultra wide band (UWB) systems, are capable of high speed wireless communication over short distances using a wide frequency band of several GHz or more in a baseband state. Such a wireless communication system uses a multi band including a plurality of sub bands to transmit high speed data.

On the other hand, in the wireless communication system, it is necessary to efficiently communicate by expanding the data transmission amount. To increase the data transmission amount, a communication device suitable for the expanded system is required.

The technical problem to be achieved by the present invention is to increase the data transmission capacity without significantly modifying the communication device in a wireless communication system using a multi-band.

A transmitting device according to an embodiment of the present invention is a transmitting device of a wireless communication system using multiple bands, the plurality of transmitting units corresponding to a plurality of subbands, and at least one of the plurality of transmitting units according to a data transmission rate are selected. And a distribution unit for transmitting the input signal to the selected transmission unit, and each transmission unit converts the output signal and transmits the output signal when the output signal is received from the distribution unit.

The apparatus may further include a scrambler that scrambles source data and outputs the input signal.

The plurality of transmitters each include an encoder for performing channel coding on the output signal from the distributor, a modulator for modulating the output signal from the encoder, and a time signal in the frequency domain for the output signal from the modulator. It may include an inverse Fourier transform unit for converting to an area.

The modulator may support 64-quadrature amplitude modulation (64 QAM).

A receiving device according to another embodiment of the present invention is a receiving device of a wireless communication system using a multi-band, each corresponding to a plurality of subbands, a plurality of antennas for receiving a radio signal, respectively, corresponding to each of the plurality of antennas And a plurality of receivers for converting the wireless signal, and a merger for merging output signals from the receiver.

The descrambler may further include a descrambler that descrambles the signal from the merger.

Each of the plurality of receivers includes a Fourier transform unit for converting the radio signal from the time domain to the frequency domain, a demodulator for demodulating the output signal from the Fourier transform unit, and a decoder for decoding the output signal from the demodulator. It may include.

The demodulator may demodulate 64 quadrature amplitude modulation (64 QAM).

A transmission and reception method according to another embodiment of the present invention is a method for transmitting a radio signal in a wireless communication system using multiple bands, the method comprising: selecting at least one of a plurality of transmitters corresponding to a plurality of subbands, and selecting an input signal Transmitting to the transmitter, converting the transmitted input signal through the selected transmitter, and transmitting the received signal; receiving the transmitted signal through a plurality of antennas corresponding to each of the plurality of subbands; Converting the received signal through a plurality of receivers corresponding to each antenna, and merging the converted signal.

The method may further include outputting the input signal by scrambled source data.

The transmitting may include encoding the transmitted input signal, modulating the encoded signal, and converting and transmitting the modulated signal from the frequency domain to the time domain.

According to the present invention, a data transmission rate is increased without greatly modifying a communication device in a wireless communication system using multiple bands.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. In addition, the terms “… unit”, “… unit”, “module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. have.

In the present specification, a terminal is a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user equipment (User Equipment). , UE), an access terminal (AT), and the like, and may include all or some functions of a mobile station, a mobile terminal, a subscriber station, a portable subscriber station, a user device, an access terminal, and the like.

In the present specification, a base station (BS) includes an access point (AP), a radio access station (RAS), a node B (Node B), an advanced node B (evolved NodeB, eNodeB), transmission and reception It may also refer to a base transceiver station (BTS), a mobile multihop relay (MMR) -BS, and the like, and may perform all or part of functions of an access point, a wireless access station, a node B, an eNodeB, a transmission / reception base station, an MMR-BS, and the like. It may also include.

Referring now to the drawings, a transmission apparatus of a wireless communication system will be described in detail in an embodiment of the present invention.

1 is a block diagram illustrating an apparatus for transmitting a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 1, a transmission apparatus of a wireless communication system according to an embodiment of the present invention includes a scrambler 110, a distribution unit 120, and a plurality of transmission units 130a, 130b, and 130c.

The scrambler 110 scrambles the source data. Accordingly, it is possible to prevent the loss of the timing information and to suppress the cross-modulation phenomenon occurring in the transmission path by suppressing a single frequency component generated when the periodic data pattern is repeated. The scrambler 110 may be parallelized to process input data at the maximum transmission magnification rate.

The distribution unit 120 outputs the source data that has passed through the scrambler 110 to the transmitters 130a, 130b, and 130c. In this case, the distribution unit 120 may select at least one of the three transmission units 130a, 130b, and 130c to output source data to the selected transmission units 130a, 130b, and 130c. On the other hand, the distribution unit 120 includes a dual memory for performing a read / write alternately, each memory may store the maximum size of the code word (code word).

Each transmitter 130a, 130b, 130c corresponds to any three sub bands among the multi bands. Each transmitter 130a, 130b, 130c includes an encoder 131, a modulator 133, an inverse fast Fourier transformer 135, a transmit back end 137, and an antenna. (139).

The encoder 131 performs channel encoding on the source data, and a channel code may use a convolutional code or a low density parity check (LDPC) code. The encoder 131 may be parallelized so that data can be calculated by the maximum size of the codeword.

The modulator 133 modulates the data encoded by the encoder 131. In this case, the modulator 133 may use a 64-quadrature amplitude modulation (64 QAM) scheme as a modulation scheme. In the 64-QAM scheme, six bits of data are allocated to one symbol, and the data rate is increased by three times compared to quadrature phase shift keying (QPSK), in which two bits of data are allocated to one symbol.

The inverse Fourier transformer 135 receives the modulated data and converts the modulated data into a time domain signal.

The transmission back end 137 performs processing such as filtering, frequency conversion, and digital-to-analog conversion of the data converted into the time domain signal.

The antenna 139 radiates analog data from the transmission rear end 137.

In the present embodiment, but shown as including three transmitters (130a, 130b, 130c), the present invention is not limited to this, and includes at least one transmitter corresponding to any one sub-band of the multi-band can do.

A transmission method of a wireless communication system will now be described in detail with reference to FIG. 2.

Referring to FIG. 2, the scrambler 110 scrambles the source data (S201). Thereafter, the distribution unit 120 selects the transmission units 130a, 130b, and 130c corresponding to the subbands to be transmitted among the multiple bands (S202), and distributes the scrambled source data to the corresponding transmission units 130a, 130b, and 130c. (S203). In this case, at least one subband to be transmitted may be selected. The more subbands you select, the greater the amount of data transfer.

Thereafter, the selected transmitters 130a, 130b, and 130c perform encoding on the distributed source data (S204), and then modulate the encoded data (S205).

Subsequently, the selected transmitters 130a, 130b, and 130c convert the modulated data from the frequency domain to the time domain (S206), and perform signal processing such as digital-to-analog conversion and filtering (S207). The data thus processed is radiated through the antenna (S208).

Since the transmission method according to an embodiment of the present invention modulates using the 64-orthogonal amplitude modulation method (64 QAM), the data transmission amount is increased three times compared to the transmission method using the quadrature phase shift keying (QPSK), and the transmitter 130a , Two transmission bands of the multiple bands are occupied at the same time when the two transmissions are selected and transmitted, 130b and 130c. Therefore, the data transmission amount is increased by two times, and the three transmission units 130a, 130b and 130c are selected and transmitted. In this case, three subbands of the multiple bands are occupied and transmitted at the same time, thereby increasing the data throughput by three times.

Now, a reception apparatus of a wireless communication apparatus according to an embodiment of the present invention will be described in detail with reference to FIG. 3.

Referring to FIG. 3, a receiving apparatus of a wireless communication apparatus according to an embodiment of the present invention includes a plurality of antennas 310a, 310b, 310c, a plurality of receiving front ends 320a, 320b, 320c, and a synchronizer 330. , A plurality of receivers 340a, 340b, and 340c, a merger 350, and a descrambler 360.

Each of the plurality of antennas 310a, 310b, and 310c receives a signal of an arbitrary subband of the multiple bands, and these subbands are the same as the subbands corresponding to the plurality of transmitters 130a, 130b, and 130c of the transmitter. .

The plurality of reception front ends 320a, 320b, and 320c respectively perform signals such as filtering, amplification, frequency conversion, and analog-to-digital conversion on the signals received from the plurality of antennas 310a, 310b, and 310c, respectively. Will output

The synchronizer 330 receives all signals processed from the plurality of receiving front ends 320a, 320b, and 320c, synchronizes them, and transmits them to the corresponding receivers 340a, 340b, and 340c. The synchronizer 330 is connected to all three receivers 340a, 340b, and 340c in order to hop between subbands in order to receive a preamble and a header in common.

The receivers 340a, 340b, and 340c include a Fourier transformer 341, a demodulator 343, and a decoder 345, respectively.

The Fourier transformer 341 converts a signal from the synchronizer 330 from a time domain signal to a signal in a frequency domain.

The demodulator 343 demodulates the signal converted into the frequency domain in response to the modulation performed by the modulator 133 of the transmitter 130.

The decoder 345 decodes the demodulated signal corresponding to the encoding performed by the encoder 131 of the transmitter 130. The type of decoding varies according to the channel code used by the encoder 131, and the decoder 345 may receive a signal that has passed through a log likelihood ratio calculator. The decoder 345 may also be parallelized so that data can be calculated by the maximum size of the codeword.

The merger 350 integrates and outputs signals input in parallel from the three receivers 340a, 340b, and 340c.

The descrambler 360 generates original data from an arbitrary code sequence generated by the scrambler 110. Descrambler 360 may also be parallelized to operate at the maximum transfer rate.

Now, a reception method of a wireless communication system according to an embodiment of the present invention will be described in detail with reference to FIG. 4.

Referring to FIG. 4, the antennas 310a, 310b, and 310c receive a radio signal according to each subband (S401). Where each subband is a subband selected in the transmission method. Signal processing such as filtering, amplification, frequency conversion, and analog-to-digital conversion is performed on the wireless signals received by the reception front ends 320a, 320b, and 320c (S402). The processed signal is subjected to a synchronization process in the synchronizer 330 (S403), and is Fourier transformed by the Fourier transform unit 341 (S404). The Fourier transform is a process corresponding to the inverse Fourier transform (S305) of the transmission method, and the signal is converted from the time domain to the frequency domain. The signal converted into the frequency domain is demodulated by the demodulator 343 (S405) and decoded by the decoder 345 (S406). The demodulation and decoding processes correspond to the modulation (S304) and the encoding (S303) processes in the transmission method. The decoded signal is merged in the merging unit 350 (S407). If the transmission method uses only one subband, the merging process (S407) is omitted. The merged signal is descrambled in the descrambler 360 (S408).

The embodiments of the present invention described above are not only implemented through the apparatus and the method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiments of the present invention or a recording medium on which the program is recorded.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 is a block diagram illustrating an apparatus for transmitting a wireless communication system according to an embodiment of the present invention.

2 is a flowchart illustrating a transmission method according to an embodiment of the present invention.

3 is a block diagram illustrating a receiving apparatus of a wireless communication system in an embodiment of the present invention.

4 is a flowchart illustrating a receiving method according to an embodiment of the present invention.

Claims (11)

A transmitting device of a wireless communication system using multiple bands, A plurality of transmitters respectively corresponding to the plurality of subbands, and A distribution unit that selects at least one of the plurality of transmitters according to a data rate and transfers an input signal to the selected transmitter Including, Each transmitter converts and outputs the output signal when the output signal is received from the distribution unit. Transmitting device. In claim 1, And a scrambler that scrambles source data and outputs the input signal. In claim 1, Each of the plurality of transmitters, An encoder which performs channel encoding on the output signal from the distribution unit, A modulator for modulating an output signal from the encoder, and An inverse Fourier transformer for converting an output signal from the modulator from a frequency domain to a time domain Containing Transmitting device. 4. The method of claim 3, The modulator transmits 64-quadrature amplitude modulation (64-Quadrature Amplitude Modulation, 64 QAM). A receiving device of a wireless communication system using multiple bands, A plurality of antennas respectively corresponding to a plurality of subbands, each receiving a radio signal; A plurality of receivers corresponding to each of the plurality of antennas and converting the radio signals; Merging unit for merging the output signal from the receiving unit Including, Each of the plurality of receivers, Fourier transform unit for converting the radio signal from the time domain to the frequency domain, A demodulator for demodulating the output signal from the Fourier transform unit, and Decoder for decoding the output signal from the demodulator Receiving device comprising a. The method of claim 5, And a descrambler that descrambles the signal from the merger. delete The method of claim 5, And a demodulator demodulates 64 quadrature amplitude modulation (64 QAM). A radio signal transmission / reception method of a wireless communication system using multiple bands, Selecting at least one of a plurality of transmitters respectively corresponding to the plurality of subbands, Transmitting an input signal to the selected transmitter; Converting and transmitting the transmitted input signal through the selected transmitter; Receiving the transmitted signal through a plurality of antennas corresponding to each of the plurality of subbands, Converting the received signal through a plurality of receivers corresponding to each of the plurality of antennas, and Merging the converted signals Transmission method comprising a. The method of claim 9, And scrambled source data to output the input signal. The method of claim 9, The transmitting step, Encoding the transmitted input signal; Modulating the encoded signal, and Transmitting the modulated signal from the frequency domain to the time domain and transmitting Transmission method comprising a.

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