KR100456458B1 - An apparatus and method for modulating baseband physical channel using multi-carriers, wireless communication system having thereof - Google Patents

Abstract

The present invention relates to an apparatus and method for forming a baseband physical channel using multiple carriers and a wireless communication modulation system having the same.

In the present invention, in a baseband physical channel forming apparatus of a wireless communication modulation system for modulating and simultaneously transmitting subcarriers having orthogonality to each other, when received upper layer data processed from the outside is received, the received upper layer data is converted into a multicarrier. A frequency domain frame forming unit configured to form a frequency domain frame for transmission of the data, a fast inverse Fourier transform unit for fast inverse Fourier transforming the data of the formed frequency domain frame, and inserting a guard interval into the fast inverse Fourier transform data to the time domain frame A guard interval inserting portion to be formed and a gain adjusting portion for adjusting a gain of the formed time domain frame.

Through this, it is possible to support various types of modulation mapping to support various services.

Description

Baseband physical channel forming apparatus using multi-carrier and its method and wireless communication modulation system having same.

The present invention relates to a modulator of a wireless communication system using a multi-carrier, and more particularly, to a baseband physical channel forming apparatus and a method using the multi-carrier capable of effectively generating a physical channel to be transmitted and the same A wireless communication modulation system.

In general, in a wireless communication system using multiple carriers, that is, orthogonal frequency division multiplexing (OFDM) -based wireless communication modulation system, subcarriers having orthogonality to each other are modulated by digital data and transmitted simultaneously. Since the sum of the modulated narrow band subcarriers forms the entire transmission band, the symbol spacing on the time axis is increased, which makes it possible to reduce the interference between symbols due to multipath fading.

The wireless communication modulation system having this feature will be described in detail with reference to the accompanying drawings.

1 is a diagram schematically illustrating a configuration of a wireless communication modulation system according to the prior art.

Referring to FIG. 1, a wireless communication modulation system according to the related art includes an upper layer interface unit 100, a baseband physical channel former 110, a pulse shaping filter 120, a high frequency converter 130, and an antenna 140. The baseband physical channel former 110 includes a plurality of miracle band physical channel formers.

In detail, the data received by the upper layer interface unit 100 is transferred to the baseband physical channel former 110. The baseband physical channel formers 111 to 111n transfer the service-specific data to the pulse shaping filter 120 according to the type of the physical channel.

Thereafter, the high frequency converter 130 converts the baseband analog signal of the pulse shaping filter 120 into a signal of a high frequency region and radiates it into the air through the antenna 140.

However, such a wireless communication modulation system is not suitable for the next generation wireless communication system requiring a modulation mapping scheme of various transmission rates according to the type of service because the physical channel to be modulated is constant.

Therefore, there is a need for research on a wireless communication modulation system and a method for supporting various modulation mapping schemes.

As a technology related to providing such a modulation scheme, the right holder has Matsushita Denki Sangyo Co., Ltd. [Patent Name: Orthogonal Frequency Division Multiplexing Transmission / Reception Device and Method, Communication Terminal Device and Base Station Device Using the Same, Application No. 10-2000- Patent No. 10027, which is intended to simplify the structure of an orthogonal frequency division multiplexing (OFDM) transmission / reception apparatus used for mobile communication.

The technical problem to be solved by the present invention is to solve this problem, it is a multi-carrier that can support a variety of modulation mapping schemes required to provide a variety of services (voice, video, or data packet related services, etc.) To provide a baseband physical channel forming apparatus and method using the same and a wireless communication modulation system having the same.

1 is a diagram schematically illustrating a configuration of a wireless communication modulation system according to the prior art.

2 is a diagram showing the overall configuration of a wireless communication modulation system according to an embodiment of the present invention.

3 is a diagram illustrating in detail an internal configuration of a baseband physical channel forming apparatus according to an embodiment of the present invention.

FIG. 4 is a diagram illustrating an internal configuration of the frequency domain frame forming apparatus 320 shown in FIG. 3 in detail.

FIG. 5 is a detailed diagram illustrating an internal configuration of the preamble forming apparatus 430 shown in FIG. 4.

FIG. 6 is a diagram illustrating an internal configuration of the data slot forming apparatus 440 shown in FIG. 4 in detail.

FIG. 7 is a detailed view illustrating an internal configuration of the guard period insertion device 340 shown in FIG. 3.

※ Explanation of code for main part of drawing ※

200: upper layer interface 210: processor controller

220: dual port memory 230: baseband physical channel former

240: analog conversion and frequency band limiter

250: high frequency converter 260: antenna

340: protection section insertion device 350: gain control device

430: preamble forming apparatus

450: Frequency domain frame combining device

510: SHORT sequence read-only memory

520: LONG Sequence Read Only Memory

630: modulation mapping device

640: pilot pattern forming apparatus

A baseband physical channel forming apparatus using a multi-carrier according to the present invention for achieving this object is a baseband physical channel forming apparatus of a wireless communication modulation system for modulating and transmitting subcarriers having orthogonality to each other at the same time, from the outside A frequency domain frame forming unit configured to form the received upper layer data as a frequency domain frame for transmission on a multicarrier when the processed upper layer data is received; A fast inverse Fourier transform unit for fast inverse Fourier transform data of the formed frequency domain frame; A guard interval insertion unit inserting a guard interval into the fast inverse Fourier transform data to form a time domain frame; And a gain adjuster adjusting a gain of the formed time domain frame.

In addition, the wireless communication modulation system according to another aspect of the present invention, in the wireless communication modulation system for modulating and simultaneously transmitting subcarriers having orthogonality to each other, when the data related to the upper layer is received from the outside, processing the received data A processor controller for processing and controlling; A baseband physical channel former configured to form the processed upper layer data into frames of a time domain for each service type according to a physical channel type control command of the processor controller; A frequency band limiter which converts a signal received from the baseband physical channel former into an analog signal, and then partially limits the baseband frequency band; A high frequency converter for converting a signal received from the frequency band limiter into a high frequency analog signal; And a transmitter for transmitting the converted high frequency analog signal to the outside.

In addition, the baseband physical channel formation method according to another aspect of the present invention, in the baseband physical channel formation method of a wireless communication modulation system for modulating and transmitting subcarriers having orthogonality to each other at the same time, a) a higher level processed from the outside If hierarchical data is received, forming the received higher layer data into a frequency domain frame for transmission on a multicarrier; b) fast inverse Fourier transforming the data of the formed frequency domain frame; c) inserting a guard interval into the fast inverse Fourier transform data to form a time domain frame; And d) adjusting the gain of the formed time domain frame.

In addition, according to another aspect of the present invention, a recording medium including a method for forming a baseband physical channel of a wireless communication modulation system for modulating and transmitting subcarriers having orthogonality to each other at the same time, the method comprising: a) A function of forming the received higher layer data into a frequency domain frame for transmission on a multi-carrier when received; b) a fast inverse Fourier transform of the data of the formed frequency domain frame; c) inserting a guard interval into the fast inverse Fourier transformed data to form a time domain frame; And c) a recording medium having recorded thereon a program including a function of adjusting a gain of the formed time domain frame.

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

2 is a diagram showing the overall configuration of a wireless communication modulation system according to an embodiment of the present invention.

In the present invention, a binary phase shift modulation, quadrature phase shift modulation, quadrature amplitude modulation, etc., to form a frame for multi-carrier transmission in accordance with the amount of data received from a higher layer according to a service type. Frames in the frequency domain to match the same multiple modulation mappings. Then, the formed frame is transformed into a fast domain Fourier transform to form a frame in the time domain, and then a guard interval is inserted to reduce the interference between the transmission symbols and the interference between the carriers, and the gain is adjusted according to the transmission power to generate a signal to be transmitted. do.

Referring to FIG. 2, the wireless communication modulation system using the multi-carrier according to the present invention includes an upper layer interface 200, a processor controller 210, a dual port memory 220, and a baseband physical channel former 230. , Analog conversion and frequency band limiter 240, high frequency converter 250, and antenna 260.

In more detail, first, the upper layer interface unit 200 is responsible for the interface of data and control according to the type of service from the upper layer.

The processor controller 210 is in charge of total control of a wireless communication modulation system using multiple carriers, and is responsible for processing and controlling data received from the upper layer interface unit 200.

The dual port memory 220 is transmitted through the upper layer interface unit 200 to receive the processed upper layer data through the processor controller 210.

The baseband physical channel forming apparatus 230 uses the upper layer data transmitted from the dual port memory 220 according to the service type of the processor controller 210 and the control command for the use of the multi-carrier. To form.

The analog conversion and frequency band limiter 240 limits the output of the baseband physical channel forming apparatus 230 to analog signal conversion and the baseband frequency band.

The high frequency converter 250 carries a carrier wave on an analog signal having a limited frequency band and converts it into an analog signal of a high frequency.

The antenna 260 propagates the output of the high frequency 250 to the air.

The operation process of the wireless communication modulation system constituting such a structure will be described as follows.

When the upper layer interface 200 receives data and control thereof from the upper layer, the upper layer interface 200 transmits the received data to the processor controller 210, and the processor controller 210 is responsible for processing and controlling the received data.

Thereafter, when the upper layer data processed by the processor controller 210 is transmitted to the baseband physical channel forming apparatus 230 through the dual port memory 220, the baseband physical channel forming apparatus 230 receives the received upper layer. To form a time domain frame for each service according to a control command of the processor controller 210.

Thereafter, the analog conversion and frequency band limiter 240 converts the output of the physical channel forming apparatus 230 into an analog signal having a limited frequency band, and the high frequency converter 250 of the analog conversion and frequency band limiter 240 Convert the output signal to a high frequency analog signal. Thereafter, the antenna 260 transmits the output of the high frequency converter 260 to the atmosphere.

Next, the baseband physical channel forming apparatus 230 in charge of the core functions of the wireless communication modulation system having such a structure will be described in detail with reference to the accompanying drawings.

3 is a diagram illustrating in detail the internal configuration of a baseband physical channel forming apparatus using multiple carriers according to an embodiment of the present invention.

Referring to FIG. 3, a baseband physical channel forming apparatus according to an embodiment of the present invention may include a processor controller interface 300, a dual port memory interface 310, a frequency domain frame forming unit 320, and a fast inverse Fourier transform. The unit 330, the guard period insertion unit 340, and the gain control unit 350 are respectively shown.

In more detail, the baseband physical channel forming apparatus 230 according to the present invention (230 of FIG. 2), an interface between the processor controller interface 300 and the dual port memory 220, which is in charge of the interface with the processor controller 210. Dual port memory interface 310 in charge, frequency domain frame forming apparatus 320 in charge of preamble and data modulation mapping, fast inverse Fourier transform 330 for transmission on multiple carriers, cyclic prefix It includes a guard interval insertion device 340 for inserting a, and a gain control device 350 for adjusting the power of the signal to be transmitted.

An operation process of the baseband physical channel forming apparatus having such a structure is briefly described as follows.

First, in forming the physical channel frame of the upper layer data according to the service type by the processor controller interface 300, if the corresponding data is received through the dual port memory interface 310, the frequency domain frame forming apparatus 320 The received data is used to form a frame in a frequency domain to be carried on various carriers.

Thereafter, the fast inverse Fourier transform apparatus 330 converts a frame of the frequency domain to be carried on the carrier wave formed by the frequency domain frame forming apparatus 320 into a frame of the time domain, and uses a fast inverse Fourier transform during the conversion.

Subsequently, the guard interval insertion apparatus 340 reduces the influence of the communication channel by copying a part of the physical channel frame in the time domain again, and the gain adjusting apparatus 350 adjusts the gain through power control of a signal to be transmitted.

Here, the frame forming apparatus 320 in the frequency domain will be described in detail with reference to the accompanying drawings.

FIG. 4 is a diagram illustrating an internal configuration of the frequency domain frame forming apparatus 340 shown in FIG. 3 in detail.

As shown in FIG. 4, the frequency domain frame forming apparatus (340 of FIG. 3) includes a timer 400, a processor interface 410, a dual port memory interface 420, a preamble forming apparatus 430, and a data slot forming apparatus. 440 and the frequency domain frame combining apparatus 450.

In more detail, first, the timer 400 generates time information when preambles are to be made and data to which modulation mapping is to be performed.

The processor interface 410 may include constellation information of the preamble modulation mapping, data modulation mapping related information and constellation information for each service, and data location information on the dual port memory. Interface to control.

The dual port memory interface 420 interfaces to transfer data received from the dual port memory (220 in FIG. 2) to the data slot forming apparatus 440.

The preamble forming apparatus 430 generates a repeating sequence of a constant repeating pattern.

The data slot forming apparatus 440 generates a data modulation mapping signal and a constant pilot signal according to a control command received from the processor controller interface 410 using data received from the dual port memory interface 420.

The frequency domain frame combiner 450 combines the signal generated by the preamble forming apparatus 430 and the signal generated by the data slot forming apparatus 440 to generate a frame signal of the frequency domain to be used as an input of a multicarrier. .

Here, the internal configuration of the preamble forming apparatus 430 in the baseband physical channel forming apparatus having such a configuration will be described in detail with reference to the accompanying drawings.

FIG. 5 is a detailed diagram illustrating an internal configuration of the preamble forming apparatus 430 shown in FIG. 4.

As shown in FIG. 5, the preamble forming apparatus 430 of FIG. 4 includes a timer interface 500, a SHORT sequence read only memory 510, a LONG sequence read only memory 520, and a preamble combination. Device 530.

In more detail, first, the timer interface 500 receives timing information for transmitting a SHORT sequence and timing information for transmitting a LONG sequence from the timer 400 of FIG. 4 to obtain time information about timing. to provide.

The SHORT sequence read only memory 510 provides a read only memory that stores a sequence value of a frequency domain of a complex short term (SHORT) sequence for modulation mapping.

The LONG sequence read-only memory 520 provides a read-only memory that stores a sequence value of a frequency domain of a complex long-term (LONG) sequence for modulation mapping.

The preamble combining device 530 generates a data address to be read from the corresponding read-only memory using the time information obtained through the timer interface 500, and then uses the generated data address and the value of the SHORT sequence. The value of the (LONG) sequence is read and modulated mapped to form a frequency domain frame of the preamble.

Next, the data slot forming apparatus in the frequency domain frame forming apparatus 340 of FIG. 3 will be described in detail with reference to the accompanying drawings.

FIG. 6 is a diagram illustrating an internal configuration of the data slot forming apparatus 440 shown in FIG. 4 in detail.

As shown in FIG. 6, the data slot forming apparatus 440 according to the present invention includes a processor interface 600, a dual port memory interface 610, a dual port memory address generator 620, a modulation mapping apparatus 630, And a pilot pattern forming apparatus 640 and a combiner 650.

In more detail, first, the dual photo memory address generator 620 may include an amount of data according to a modulation mapping method for each service type received from the processor interface 600, an amount of modulation mapping already performed by the modulation mapping device 630, and the processor controller 210. ) Generates an address for reading data of the upper layer of the dual port memory 220 and transmits the generated address to the dual port memory interface 610.

The modulation mapping apparatus 630 forms a signal according to modulation mapping, that is, a constellation value, of data of a higher layer read through the dual port memory interface 610 according to a control command of the processor interface 600.

The pilot forming apparatus 640 generates a pilot pattern.

The combiner 650 combines the data modulation signal of the modulation mapping apparatus 630 and the outputs of the pilot pattern forming apparatus 640 to form the output of the data slot forming apparatus 450.

Next, the internal configuration of the guard interval insertion device 340 in the baseband physical channel forming apparatus will be described in detail with reference to the accompanying drawings.

FIG. 7 is a diagram illustrating an internal configuration of the guard interval insertion device 340 shown in FIG. 3 in detail.

As shown, the guard interval insertion device (340 of FIG. 3) according to an embodiment of the present invention includes an address generator 700, a fast inverse Fourier transform interface 710, a timer 720, and a dual port memory A 730. And a dual port memory B 740, a time domain frame data counter, and a multiplexer (760).

In more detail, first, the fast inverse Fourier transform interface 710 interfaces to provide fast inverse Fourier transform data carrying frame data of a frequency domain on a multicarrier.

The address generator 700 provides an index of fast inverse Fourier transform data received via the fast inverse Fourier transform interface 710.

Dual port memory A 730 and dual port memory B 740 provide a double buffer function of fast inverse Fourier data.

The timer 720 includes timing information at which fast inverse Fourier data is to be written among the dual port memory A 730 and the dual port memory B 740, and any one of the dual port memory A 730 and the dual port memory B 740. Generates timing information related to whether data in the memory should be read.

The time domain frame data counter 750 generates an address for reading data of the dual port memory A 730 and the dual port memory B 740.

The MUX 760 multiplexes data of the dual port memory A 730 and the dual port memory B 740 to generate an output signal.

The operation process of the guard interval insertion device 340 constituting such a structure will be described in detail as follows.

First, when the fast inverse Fourier transform interface 710 interfaces with the fast inverse Fourier transform data, the address generator 700 sends the generated address to the data and address of the dual port memory A 730 and the dual port memory B 740. Enter each. At this time, the write control of the dual port memory A 730 and the dual port memory B 740 is controlled by a timer 720 to provide a dual buffer mode.

Thereafter, the time-domain frame data counter 750 sequentially generates a faster rate address to be input to the addresses of the dual port memory A 730 and the dual port memory B 740, and the MUX 760. ) Is the information received from the timer 720 among the generated fast-rate signals (data of the fast inverse Fourier transform device interface 710 in the memory of any port of the dual port memory A 730 and the dual port memory B 740). Outputs the memory data of the opposite port.

As described above, the guard interval insertion apparatus 340 according to the present invention separates the address generator 700 and the time domain frame data counter 750, thereby generating signals having different rates and inserting the guard intervals.

As such, the baseband physical channel forming apparatus and method and the wireless communication modulation system including the same according to an embodiment of the present invention can support various types of modulation mapping to support various services using multiple carriers. .

The drawings and detailed description of the invention are merely exemplary of the invention, which are used for the purpose of illustrating the invention only and are not intended to limit the scope of the invention as defined in the claims or in the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

An apparatus and method for forming a baseband physical channel according to the present invention and a wireless communication modulation system having the same have an effect of supporting various types of modulation mapping for supporting various services using multiple carriers.

Claims (13)

A baseband physical channel forming apparatus of a wireless communication modulation system for modulating and simultaneously transmitting subcarriers having orthogonality to each other, A frequency domain frame forming unit configured to form the received higher layer data into a frequency domain frame for transmission on a multicarrier when received higher layer data processed from the outside; A fast inverse Fourier transform unit for fast inverse Fourier transform data of the formed frequency domain frame; A guard interval insertion unit inserting a guard interval into the fast inverse Fourier transform data to form a time domain frame; And A gain adjuster for adjusting a gain of the formed time domain frame Baseband physical channel forming apparatus comprising a. According to claim 1, The frequency domain frame forming unit, An interface unit in charge of an interface with an external device; A preamble forming unit forming a preamble (PREAMBLE); A data slot forming unit configured to process data of the dual port memory to form a data slot SOLT; A timer configured to set an operation time position of the preamble forming unit and the data slot forming unit; And Frequency domain frame combiner for combining a frequency domain frame from the formed preamble and data slot Baseband physical channel forming apparatus comprising a. The method of claim 2, The preamble forming unit, A SHORT sequence read-only memory for storing data of the SHORT sequence; A LONG sequence read-only memory for storing data of a long sequence; A timer interface for providing timing information based on time information received from the timer; And A preamble combiner for forming a preamble by combining the data of the SHORT sequence read only memory and the data of the LONG sequence read only memory from the time information obtained through the timer interface. Baseband physical channel forming apparatus comprising a. The method of claim 2, The data slot forming unit, An interface unit in charge of an interface with an external device; An address generator for generating an address of a corresponding memory for reading data to be modulated; A modulation mapping unit for modulating mapping data of the dual port memory according to a process control signal of the interface unit; A pilot pattern forming unit forming a pilot pattern; And Coupling unit for combining the modulation-mapped data and the formed pilot pattern Baseband physical channel forming apparatus comprising a. According to claim 1, The guard period insertion unit, An address generator for generating an index according to output bit ordering of the fast inverse Fourier transform unit; A fast inverse Fourier transform interface for fast inverse Fourier transform data received from the fast inverse Fourier transform; First dual port memory for dual buffer mode support; A second dual port memory configured to store data of a slot time before data of the fast inverse Fourier transform unit is recorded in the first dual port memory; A time domain frame data counter for generating an address for reading data of the first and second dual port memories; A coupling unit coupling data of the first and second dual port memories; And A timer to perform write control of the first and second dual port memories. Baseband physical channel forming apparatus comprising a. In a wireless communication modulation system for modulating and transmitting subcarriers having orthogonality to each other at the same time, A processor controller configured to process and control the received data when data related to a higher layer is received from the outside; A baseband physical channel former configured to form the processed upper layer data into frames of a time domain for each service type according to a physical channel type control command of the processor controller; A frequency band limiter which converts a signal received from the baseband physical channel former into an analog signal, and then partially limits the baseband frequency band; A high frequency converter for converting a signal received from the frequency band limiter into a high frequency analog signal; And A transmitter for transmitting the converted high frequency analog signal to the outside Wireless communication modulation system comprising a. The method of claim 6, A data storage unit for storing and managing the processed upper layer data; An information providing unit for providing information on the processor controller and the baseband physical channel forming period. Wireless communication modulation system further comprises. The method of claim 7, wherein The baseband physical channel former, A frequency domain frame forming unit configured to form the received upper layer data as a frequency domain frame for transmission on a multicarrier when the processed upper layer data is received from the processor controller; A fast inverse Fourier transform unit for fast inverse Fourier transform data of the formed frequency domain frame; A guard interval insertion unit inserting a guard interval into the fast inverse Fourier transform data to form a time domain frame; And A gain adjuster for adjusting a gain of the formed time domain frame Wireless communication modulation system comprising a. The method of claim 8, The baseband physical channel former, A first interworking unit in charge of an interface with the processor controller; A second interworking unit in charge of an interface with the data storage unit; And Third interlocking unit in charge of the interface (INTERFACE) with the information providing unit Wireless communication modulation system further comprises. A method of forming a baseband physical channel in a wireless communication modulation system for modulating and simultaneously transmitting subcarriers having orthogonality to each other, a) if the processed higher layer data is received from the outside, forming the received higher layer data into a frequency domain frame for transmission on a multicarrier; b) fast inverse Fourier transforming the data of the formed frequency domain frame; c) inserting a guard interval into the fast inverse Fourier transform data to form a time domain frame; And d) adjusting the gain of the formed time domain frame Baseband physical channel forming method comprising a. The method of claim 10, Step a) is Forming a preamble through an interface with an external device; Processing data in the dual port memory to form a data slot (SOLT); And Combining the formed preamble and a data slot into a frequency domain frame Baseband physical channel forming method comprising a. The method of claim 11, wherein Forming the preamble (PREAMBLE), Combining stored short and long data sequences according to time information provided from a timer; Baseband physical channel forming method comprising a. A recording medium comprising a method of forming a baseband physical channel in a wireless communication modulation system for modulating and transmitting subcarriers having orthogonality to each other at the same time, a) a function of forming the received higher layer data into a frequency domain frame for transmission on a multi-carrier when the processed higher layer data is received from the outside; b) a fast inverse Fourier transform of the data of the formed frequency domain frame; c) inserting a guard interval into the fast inverse Fourier transformed data to form a time domain frame; And c) a function of adjusting the gain of the formed time domain frame Recording medium in which a program comprising a recording.