JP2006074739A - Repeater, repeater circuit, repeating method, and repeating program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress deterioration of signal quality resulting from transmission line noise and interference in relay of a quadrature division multiple signal transmitted hierarchically. <P>SOLUTION: An input signal is tuned in a desired band at a demodulation part 101 and converted from an analog signal to a digital signal by quadrature demodulation. Discrete Fourier-transformation is performed at a Fourier-transforming part 102. Types or hierarchy information on a carrier on a symbol is determined at a carrier information determining part 103. Characteristics of a transmission line are estimated based on the type or hierarchy information on the carrier and equalized at an equalizing part 104. Data of a higher-rank office is estimated from the equalized data based on the type or hierarchy information on the carrier at a determining part 105. Inverse discrete Fourier-transformation is performed at an inverse Fourier transforming part 106. Part of the symbol on a time domain is added to the symbol as a guard signal at a guard inserting part 107. A digital signal is converted to an analog signal by performing quadrature modulation to a desired band at a modulating part 108. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an apparatus, a circuit, a method, and a program for suppressing signal quality degradation due to noise and interference on a transmission line in relaying orthogonal division multiplexed signals that are hierarchically transmitted.

As a conventional relay device, there is a relay device disclosed in Patent Document 1 below, and FIG. 13 and FIG.
FIG. 13 corresponds to the first embodiment of the following patent document, and includes a reception unit 1001, a relay processing unit 1002, a transmission unit 1003, and a synchronization circuit unit 1004. The reception unit 1001 includes a down converter 1012, A / D conversion. 1013, a quadrature detector 1014, and a discrete Fourier transformer 1015. The relay processing unit 1002 includes an equalization circuit 1016, a determination circuit 1017, and a pilot insertion circuit 1018. The transmission unit 1003 includes a discrete inverse Fourier transformer 1019. A quadrature modulator 1020, a D / A converter 1021, and an up-converter 1022 are included.

The receiving unit 1001 converts the received signal into a digital signal having an intermediate frequency, performs quadrature detection, performs discrete Fourier transform, and outputs the result as carrier data.
In the equalization circuit 1016, the frequency response of the transmission path of the relay station input signal is estimated by complex-dividing the pilot value included in the carrier data by the known pilot value on the receiving side, and the carrier data is calculated with the estimated frequency response. Further, equalization processing is performed by complex division and output.

The determination circuit 1017 estimates and outputs the transmission data having the shortest Euclidean distance from the equalization circuit output among the possible values of the transmission data of the higher station.
The pilot insertion circuit 1018 inserts a pilot with a predetermined modulation level prepared in advance for a predetermined carrier in a predetermined symbol of the determination circuit output.
The transmission unit 1003 performs discrete inverse Fourier transform on the pilot insertion circuit output, orthogonally modulates it, converts it to an analog signal using the same sampling clock as the reception unit, converts it to a desired frequency band, and outputs it.

The synchronization circuit unit 1004 outputs a local signal for frequency conversion to the receiving unit, outputs a sampling clock used for the relay device, and a symbol timing clock used for setting the window position of the discrete Fourier transformer Is output.
Next, FIG. 14 corresponds to the second embodiment of Patent Document 1 below, and includes a receiving unit 1101, a diversity combining circuit unit 1102, a carrier data combining coefficient calculating unit 1103, a relay processing unit 1104, a transmitting unit 1105, and a synchronization circuit. The receiver 1101 includes a plurality of antennas 1111, a down converter 1112, an A / D converter 1113, an orthogonal detector 1114, and a discrete Fourier transformer 1115, and the carrier data synthesis coefficient calculator 1103 has a frequency. 13 includes a response calculation circuit 1116 and a frequency weighting coefficient calculation circuit 1117. The relay processing unit 1104 includes the same determination circuit 1119 and pilot insertion circuit 1120 as those of the relay device in FIG. 13, and the transmission unit 1105 and the synchronization circuit unit 1106 are illustrated. 13 has the same function as the transmission unit 1003 and the synchronization circuit unit 1004 of the relay device. That.

The reception unit 1101 converts reception signals of the plurality of antennas 1111 into a complex baseband signal signal using a local signal common to each branch, converts the signal into a digital signal using a sampling clock common to each branch, Quadrature detection is performed every time, and discrete Fourier transform is performed and output as carrier data.
In diversity combining circuit section 1102, a signal indicating a weighting coefficient for each carrier adapted to the signal characteristics of each input system from a plurality of antennas 1111 is input from a frequency weighting coefficient arithmetic circuit, and the weighting coefficient for each carrier and the branch The result of calculating the product sum (inner product) for each branch with each carrier data is output as one system of carrier data.

In the carrier data synthesis coefficient computing unit 1103, the frequency response of the transmission path for each branch is calculated from the carrier data for each branch by the frequency response computing circuit, and the above-described diversity synthesis circuit is obtained from the frequency response by the frequency weighting coefficient computing circuit. The weighting coefficient for each carrier used in the section is calculated.
JP 2002-330112 A

  However, in the determination circuit 1017 in the relay apparatus of the above-mentioned patent document, the value having the shortest Euclidean distance from the equalizer circuit output among the possible values of the transmission data of the higher station is estimated and output as the transmission data. When a plurality of higher-level station modulation schemes that determine values that can be taken are used and change at the time of relaying, if the higher-level station modulation schemes are not known, possible values of transmission data cannot be specified and estimation may not be possible. It is a problem. In terrestrial digital broadcasting, the transmission data modulation scheme is not only selectable from QPSK, 16QAM, 64QAM, etc., but also hierarchical transmission in which the segments to which each carrier belongs is hierarchized and the modulation scheme is selected for each layer. Yes, each carrier is interleaved across segments according to a fixed method. In the above-described relay apparatus, no means or method capable of knowing the modulation scheme of the upper station is disclosed.

  Further, in order to prevent the OFDM signal from causing intersymbol interference due to transmission path distortion, it is necessary to add a part of the symbol as a guard signal and add the card signal before and after the symbol at the upper station. At this time, the input to the discrete Fourier transformer is only one symbol period among the signals in which the guard signal is added to the symbol, and the remaining guard signal is not input. However, in relaying, transmission needs to be performed in the same form as the received signal, and it is necessary to add a guard signal corresponding to the transmitted signal. Therefore, a part of the symbol of the signal subjected to equalization determination and discrete inverse Fourier transform is guarded. It is necessary to insert the signal into the guard signal period added at the time of reception.

  Then, in the equalization circuit 1016 of Patent Document 1 above, when the frequency response of the transmission path is estimated by performing complex division of the pilot value included in the carrier data by the known pilot value on the receiving side, the carrier between adjacent pilots is estimated. Since the frequency response cannot be obtained, an error occurs in the estimation. Since pilots in terrestrial digital broadcasting are arranged every 12 carriers, 11 carriers between pilots cannot obtain a frequency response.

  The present invention solves the above-described problems, and an object of the present invention is to provide an apparatus, a method, and a program for suppressing signal quality degradation due to noise and interference on a transmission path in relaying orthogonal division multiplexed signals that are hierarchically transmitted. .

  In order to achieve the above object, a relay device according to the present invention is a relay device that relays a layered orthogonal division multiplex signal, and after selecting an input of the relay device, performs orthogonal demodulation and digital desired band Demodulating means for demodulating as a signal, orthogonal transforming means for orthogonally transforming the demodulated data, carrier information determining means for determining the type or layer information of the carrier on the symbol after the orthogonal transform, and the carrier information determination result And an equalizing means for equalizing the carrier after the orthogonal transformation, and a determining means for determining a carrier transmitted from the equalized carrier based on the carrier information determination result.

  Further, another configuration of the relay device that achieves the above object is a relay device that relays hierarchical orthogonal division multiplexed signals, wherein the relay device has a plurality of reception inputs, and each of the reception inputs is selected. Thereafter, a demodulating means for demodulating the signal as a desired digital band signal by orthogonal demodulation, an orthogonal transforming means for orthogonally transforming each demodulated data, and a carrier type or hierarchy on each symbol after the orthogonal transform Carrier information determination means for determining information, equalization combining means for equalizing and combining the respective carriers after orthogonal transformation based on at least one of the carrier information determination results, and each carrier information determination Determining means for determining a carrier transmitted from the carrier after equalization combining based on at least one of the results.

  Further, another configuration of the relay device that achieves the above object is a relay device that relays hierarchical orthogonal division multiplexed signals, wherein the relay device has a plurality of reception inputs, and each of the reception inputs is selected. Thereafter, any one of demodulation means for performing orthogonal demodulation and demodulating as a desired digital band signal, orthogonal conversion means for orthogonally converting each of the demodulated data, and a plurality of carriers on the symbols after the orthogonal conversion, Carrier information determination means for determining the type or layer information of the carrier on the symbol after the orthogonal transformation, and equalization synthesis means for equalizing and synthesizing each carrier after the orthogonal transformation based on the carrier information determination result And determination means for determining a carrier transmitted from the carrier after the equalization combining based on the carrier information determination result.

In addition to the above, the relay apparatus having another configuration that achieves the above object further includes inverse orthogonal transform means for performing inverse transform of the orthogonal transform on the output of the relay apparatus.
In addition to the above, the relay apparatus having another configuration that achieves the above object further includes guard insertion means for inserting a guard signal into the output of the relay apparatus.
In addition to the above, the relay apparatus having another configuration that achieves the above object further includes modulation means for orthogonally modulating and outputting the output of the relay apparatus to a desired band signal.

  A relay method for achieving the above object is a relay method for relaying a layered orthogonal division multiplexed signal, receiving and selecting the orthogonal division multiplexed signal, performing orthogonal demodulation, and obtaining a desired digital band signal. Based on the demodulation step for demodulating, the orthogonal transform step for orthogonally transforming the demodulated data, the carrier information determining step for determining the type or layer information of the carrier on the symbol after the orthogonal transform, and the carrier information determination result An equalization step for equalizing the carrier after the orthogonal transformation and a determination step for determining a carrier transmitted from the carrier after the equalization based on the carrier information determination result are characterized.

  Another relay method for achieving the above object is a relay method for relaying a layered orthogonal division multiplexed signal, receiving a plurality of the orthogonal division multiplexed signals, selecting each channel, and performing orthogonal demodulation. Demodulation step for demodulating as a desired digital band signal, orthogonal transformation step for orthogonally transforming each demodulated data, and carrier information for determining the type or layer information of the carrier on each symbol after the orthogonal transformation A determination step, an equalization combining step for equalizing and combining each orthogonally transformed carrier based on at least one of the carrier information determination results, and at least one of the carrier information determination results And a determination step of determining a carrier transmitted from the carrier after the equalization combining.

  Another relay method for achieving the above object is a relay method for relaying a layered orthogonal division multiplexed signal, receiving a plurality of the orthogonal division multiplexed signals, selecting each channel, and performing orthogonal demodulation. Demodulation step for demodulating as a desired digital band signal, orthogonal transformation step for orthogonally transforming each of the demodulated data, and any of the plurality of carriers on the orthogonally transformed symbols after the orthogonal transformation Carrier information determination step for determining carrier type or layer information on the symbol of each of the above, an equalization combining step for equalizing and combining the respective carriers after orthogonal transformation based on the carrier information determination result, and carrier information determination And a determination step of determining a carrier transmitted from the carrier after the equalization combining based on the result.

  The program for achieving the above-mentioned object is a program for performing relay processing for relaying a layered orthogonal division multiplexed signal, receiving and selecting the orthogonal division multiplexed signal, performing orthogonal demodulation, and performing a digital desired A demodulating step for demodulating the signal as a band signal; an orthogonal transforming step for orthogonally transforming the demodulated data; a carrier information determining step for determining a carrier type or layer information on the symbol after the orthogonal transform; and the carrier information determination An equalization step for equalizing the carrier after the orthogonal transform based on a result and a determination step for determining a carrier transmitted from the carrier after the equalization based on the carrier information determination result are characterized.

  Another program that achieves the above-described object is a program that performs relay processing for relaying a layered orthogonal division multiplexed signal, receives a plurality of the orthogonal division multiplexed signals, selects each channel, and performs orthogonal processing. Demodulation step for demodulating and demodulating as a desired digital band signal, orthogonal transformation step for orthogonally transforming each demodulated data, and determining the carrier type or layer information on each symbol after the orthogonal transformation A carrier information determination step, an equalization combining step of equalizing and combining the respective orthogonally transformed carriers based on at least one of each of the carrier information determination results, and each of the carrier information determination results And a determination step of determining a carrier transmitted from the carrier after the equalization combining based on at least one .

  Another program that achieves the above-described object is a program that performs relay processing for relaying a layered orthogonal division multiplexed signal, receives a plurality of the orthogonal division multiplexed signals, selects each channel, and performs orthogonal processing. Demodulation step for demodulating and demodulating as a desired digital band signal, orthogonal transformation step for orthogonally transforming each of the demodulated data, and a carrier on a symbol after a plurality of orthogonal transformations A carrier information determination step for determining carrier type or layer information on a symbol after orthogonal transformation, an equalization combining step for equalizing and combining the respective carriers after orthogonal transformation based on the carrier information determination result, And a determination step of determining a carrier transmitted from the carrier after the equalization combining based on a carrier information determination result, That.

In addition to the above, another relay method that achieves the above object further includes an inverse orthogonal transform step of performing an inverse transform of the orthogonal transform after the relay method processing.
In addition to the above, another relay method for achieving the above object further includes a guard insertion step of inserting a guard signal after the relay method processing.
In addition to the above, another relay method that achieves the above object further includes a modulation step of performing orthogonal modulation on a desired band signal after the relay method processing and outputting the signal.

  Another relay method for achieving the above object is a relay method for relaying a layered orthogonal division multiplexed signal, in which a transmitted signal including a transmission signal from at least one transmission source is transmitted to a reception antenna or reception terminal. The relay reception step received at step 1, the relay step after processing the received signal using the above relay method, and the signal processed at the relay step are transmitted from the transmission antenna or the transmission end as another transmission source. A relay transmission step.

  Further, another relay method for achieving the above object is a relay method for relaying a layered orthogonal division multiplexed signal, wherein a transmission step of transmitting a transmission signal from a transmission antenna or a transmission end of a transmission source, and at least the above A relay step of performing at least one relay using one relay method.

According to the configuration of the relay apparatus of the present invention, the carrier type or layer information on the symbol obtained by orthogonal demodulation and orthogonal conversion is determined, and after equalization is performed based on the result, the transmitted carrier is Estimate and make a decision.
With this configuration, the relay device can handle whatever carrier modulation scheme is set in the upper station, and can also handle switching modulation schemes, and the segments to which the carrier belongs are hierarchized. Can also handle the hierarchical information. Therefore, it is possible to relay the orthogonal division multiplexed signal transmitted in a hierarchical manner following the hierarchical information of the higher station, and to suppress signal quality deterioration due to noise and interference on the transmission path in the relay.

  In the method of determining the layer information after performing deinterleaving on the data that is processed to return the signal before interleaving to the interleaved carrier in the hierarchical transmission, a memory is required for deinterleaving. This not only increases the circuit scale, but also requires about one symbol due to processing delay. On the other hand, according to the configuration of the present invention, not only a memory for accumulating carriers is unnecessary, but also a configuration in which only a processing delay of several samples is required for data in the frequency domain is possible. Therefore, it is possible to perform relaying with a smaller circuit scale and less processing delay than the deinterleaving method.

Further, according to the configuration of the relay apparatus of the present invention, the type or layer information of the carrier on the symbol is determined for a plurality of received signals, and after being equalized and combined based on the result, it is transmitted. The estimated carrier is estimated.
With this configuration, since the noise component of each received signal can be suppressed by synthesis, the hierarchical information of the upper station is added to the hierarchically transmitted signal even in a worse reception environment than in the case of one received signal. It is possible to perform relaying in accordance with the deterioration of relay signal quality.

Further, according to the configuration of the relay apparatus of the present invention, after the carrier type or the hierarchy information on the symbol is determined for any one of the plurality of received signals, and equalization and synthesis are performed based on the result The determination is performed by estimating the transmitted carrier.
With this configuration, since only one carrier information determination process needs to be performed for a plurality of received signals, the amount of calculation can be reduced as compared with the case where the carrier information determination process for all the plurality of received signals is performed.

Further, according to the configuration of the relay apparatus of the present invention, it is possible to perform relay while suppressing signal degradation due to noise and interference on the transmission path with the signal subjected to inverse orthogonal transform.
Further, according to the configuration of the relay apparatus of the present invention, it becomes possible to relay an orthogonal division multiplexed signal composed of symbols with a guard signal inserted, and intersymbol interference due to transmission path distortion using the guard period. It is possible to perform relaying after removing.

Also, according to the configuration of the relay apparatus of the present invention, it is possible to transmit a real signal in a desired band by orthogonal modulation.
Further, by using the relay circuit of the present invention in an integrated circuit for a relay device, not only the size of the device can be reduced and power consumption can be reduced, but also the manufacturing cost can be reduced.

In addition, by using the relay method of the present invention, it is possible to provide a service for relaying a layered orthogonal division multiplexed signal over a wide area.
Further, by using the program of the present invention, the relay process can be changed by changing the program, and the relay process can be provided at a low cost.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present invention, a relay apparatus according to ISDB-T, which is a terrestrial digital broadcasting system, will be described as an example.
(Embodiment 1)
FIG. 1 is a diagram illustrating a functional configuration of the relay apparatus according to the first embodiment.
The relay apparatus includes a demodulation unit 101, a Fourier transform unit 102, a carrier information determination unit 103, an equalization unit 104, a determination unit 105, an inverse Fourier transform unit 106, a guard insertion unit 107, and a modulation unit 108, and receives from a reception antenna. A signal is input and a transmission signal is output to a transmission antenna.

  The demodulator 101 selects an input signal of the relay device in a desired band, and then performs orthogonal demodulation to obtain a complex baseband signal. In the process, an analog signal is converted into a digital signal using an A / D converter. Processing is performed to synchronize the carrier frequency, the sampling timing to be supplied to all processing units that process digital signals, and the symbol pulse to determine the window for Fourier transform input. Do it. When it is necessary to output as a desired band signal, frequency conversion is performed.

The Fourier transform unit 102 performs discrete Fourier transform on the signal for the symbol period based on the symbol pulse in order to output a carrier on the frequency domain constituting the OFDM signal.
The carrier information determination unit 103 determines the type of carrier and the hierarchy information that are carrier information. Before describing this determination method, the configuration of the OFDM signal in the terrestrial digital broadcasting system will be described below.

FIG. 3 shows an arrangement diagram of OFDM segment numbers on the transmission spectrum in the same system. A band of 6 MHz per channel is regarded as 14 OFDM segments, and one OFDM segment is regarded as no signal, and broadcasting is performed using the remaining 13 OFDM segments. Each OFDM segment is numbered as shown in FIG.
The first reference signal CP is inserted in the carrier adjacent to the highest frequency OFDM segment.

  FIG. 4 shows a configuration diagram of an OFDM segment in the same system. There is a predetermined number of carriers corresponding to the transmission mode per segment, and one frame is composed of 204 symbols. On the carrier, not only data but also the second reference signal SP, the control information TMCC, and the additional information AC are arranged in accordance with the rules of the system. Here, the TMCC is composed of a synchronization signal for performing frame synchronization, layer information such as the number of OFDM segments of each layer determined by a higher-level station, and information such as a modulation scheme.

FIG. 5 shows a configuration diagram of frequency interleaving processing in the same method. Frequency interleaving 500 is applied to the data carrier in the order of inter-segment interleaving 501, intra-segment carrier rotation 502, and intra-segment carrier randomization 503. However, inter-segment interleaving 501 is not performed in the partial reception segment.
Here, FIG. 6 shows a carrier moving method in inter-segment interleaving 501 of frequency interleaving 500.

FIG. 7 shows a carrier moving method in intra-segment carrier rotation 502 of frequency interleaving 500.
Then, in the intra-segment carrier randomization 503 in the frequency interleave 500, the carrier is moved within the segment to an irregularly defined position.
The data carriers before this frequency interleaving are arranged adjacent to each other by the number of data carriers determined by the transmission mode to form a data segment, and this data segment can be divided into a maximum of three layers in the order of younger data segment numbers. The modulation scheme and the like can be changed in each layer, and the layers are defined as the A layer, the B layer, and the C layer in ascending order.

In addition, an OFDM signal is configured by adding a guard signal in the time domain to the signal configured as described above in the frequency domain. FIG. 8 shows an example of a guard signal insertion method in the system.
Next, a method for determining the type of carrier and the hierarchy information on the symbol of the OFDM signal will be described.

FIG. 9 shows the configuration of the carrier information determination unit 103. The carrier information determination unit 103 includes a carrier type determination unit 901, a frequency deinterleave unit 902, and a layer information determination unit 903. The carrier information determination unit 103 inputs the carrier number on the symbol of the OFDM signal and determines the carrier type and layer information on the symbol. Output.
The carrier type determination unit 901 determines whether the carrier belongs to invalid, CP, SP, TMCC, AC, or data, based on the carrier number on the symbol.

  Since the carrier frequency is synchronized in the demodulator, the carrier number indicating the invalid carrier section where no carrier exists can be uniquely determined. Carriers other than invalid carriers are carriers constituting the OFDM signal. Among them, SPs have carrier numbers that change in a 4-symbol cycle as shown in FIG. 4, and adjacent SPs are arranged at 12-carrier intervals. By synchronizing the frames, the symbol number is determined, and the SP carrier is determined based on the symbol and carrier number and this regularity. As shown in FIG. 3, the carrier having the highest carrier number among the carriers constituting the OFDM signal is determined as a CP. The TMCC and AC carrier are in irregularly defined carrier numbers, and determination is performed by storing the carrier numbers in the relay device. A carrier having a carrier number that does not belong to any of the above determinations is determined as data.

The frequency deinterleave unit 902 obtains the data segment number of the data carrier determined to be data. This is performed by determining the data segment number before frequency interleaving from the carrier of the data carrier frequency interleaved and the OFDM segment number as described above.
The data segment numbers before frequency interleaving described above are the intra-segment carrier derandomization 911, intra-segment carrier derotation 912, and inter-segment de-interleaving, which are the processes for returning the three processes of the frequency interleaving 500 of FIG. 913 is obtained by performing the processing of the frequency deinterleaving unit 902 in FIG. 10 performed in the reverse order of the frequency interleaving 500 and the carrier and OFDM segment number of the frequency interleaved data carrier.

Frequency deinterleaving section 902 receives the carrier and OFDM segment number of the data carrier that has been frequency interleaved as described above, and outputs the data segment number before frequency interleaving.
The intra-segment carrier derandomization 911 is performed by storing the reverse conversion in the relay device with respect to the conversion to an irregularly determined carrier number in the intra-segment carrier randomization 503.

  The intra-segment carrier derotation 912 is performed by conversion that satisfies the following (Equation 1) and (Equation 2). However, C ′ is a carrier number after carrier derotation, C is a carrier number after carrier derandomization, S is an OFDM segment number, mod is a remainder calculation, and m is a value that differs depending on the three transmission modes.

セグメント間デインターリーブ９１３は、次の（数３）及び前述の（数２）を満たす変換により行う。ただし、Ｓ’はセグメント間デインターリーブ後のデータセグメント番号、Ｃ’はキャリアデローテーション後のキャリア番号、ｐは部分受信セグメント有の時１、無の時０となる値、ＳはＯＦＤＭセグメント番号とし、ｉｎｔは整数部を得る演算とする。

The inter-segment deinterleaving 913 is performed by conversion satisfying the following (Equation 3) and the above (Equation 2). Where S ′ is the data segment number after inter-segment deinterleaving, C ′ is the carrier number after carrier derotation, p is 1 when there is a partially received segment, and 0 when there is none, and S is the OFDM segment number , Int is an operation for obtaining an integer part.

第３に、キャリアの階層情報判定を行う。これは、ＴＭＣＣキャリアから復号したＴＭＣＣ上の階層情報から階層に属するデータセグメント番号を特定し、上記により特定されたデータセグメント番号を持つデータキャリアが属する階層に対して、ＴＭＣＣ上の階層情報から変調方式を特定して、この変調方式を前述の周波数インターリーブされたデータキャリアの変調方式と判定することで行う。

Third, carrier hierarchy information determination is performed. This specifies the data segment number belonging to the layer from the layer information on the TMCC decoded from the TMCC carrier, and modulates from the layer information on the TMCC to the layer to which the data carrier having the data segment number specified above belongs. The method is specified, and this modulation method is determined as the above-mentioned frequency-interleaved data carrier modulation method.

TMCC decoding is performed by detecting bits on the TMCC carrier and, if necessary, performing TMCC carrier majority processing and difference-set cyclic code decoding described in the digital terrestrial broadcasting system.
Since the TMCC hierarchy information has the number of data segments for each hierarchy, the data segment number belonging to the A hierarchy is a number less than the number of data segments in the A hierarchy, and the data segment number belonging to the B hierarchy is the data segment of the A hierarchy and the B hierarchy. The data segment numbers below the sum of the numbers and the data segment numbers belonging to the C layer are specified by the data segment numbers below the sum of the number of data segments of the A layer, the B layer, and the C layer.

Since the TMCC layer information has a predetermined value for specifying the modulation scheme, the modulation scheme of the data carrier is determined by referring to this.
Finally, the carrier type obtained by the carrier type determination unit 901 and the obtained modulation scheme are assigned, for example, a flag string that is 1 when applicable, 0 when not applicable, and a value assigned to each type and modulation type. By using a table, etc., the data is output together.

As described above, carrier information is determined by the first to third processes, and information indicating the type of carrier and the modulation method is output as carrier information.
The equalization unit 104 estimates transmission path characteristics based on at least one of the carrier type and the hierarchy information output from the carrier information determination unit 103, and performs complex division or conjugate of the input signal on the frequency domain based on the transmission path characteristics. Equalization is performed by complex multiplication. Here, if the type of carrier is used, the carrier inserted as a reference signal in the upper station can also be used on the relay device side, and the transmitted and distorted reference signal is used as the reference signal of the upper station known on the relay device side. The transmission path characteristics are estimated by performing complex division or conjugate complex multiplication. Then, using the hierarchy information, higher-level station data is estimated from a carrier that is not known on the relay device side by performing estimation or the like similar to a determination unit described later, and the estimated data is regarded as a reference signal as a known carrier. As a result, the number of reference signals increases and the reference signal interval on the frequency domain decreases, thereby expanding the time domain in which the reference signal can be expressed, and estimating transmission path characteristics corresponding to the expanded time domain.

  The determination unit 105 determines and outputs the higher station data based on at least one of the carrier type and the hierarchy information from the equalized data, and outputs noise added on the transmission path. remove. Here, when the type of carrier is used, an invalid carrier without data is determined to be a predetermined value such as 0, and the reference signal is a known value of a higher station or a value that can be obtained by a known modulation method even if it is not a known value The closest value is determined. When the hierarchy information is used, the modulation scheme of each carrier is known, and the closest value among the values that can be taken by the modulation scheme is determined.

The inverse Fourier transform unit 106 performs discrete inverse Fourier transform to obtain a time domain signal necessary for transmission.
The guard insertion unit 107 performs guard insertion in the time signal by adding a part of the symbol in the time domain as a guard signal to the symbol so as not to cause intersymbol interference due to transmission path distortion. As a result, even if other symbols interfere with each other during the guard period, it is possible to prevent inter-symbol interference except for the interference portion.

In the modulation unit 108, an input signal having the same band as the output of the demodulation unit is orthogonally modulated to a desired band and output. In the process, a digital signal is converted into an analog signal using a D / A converter. Moreover, output power control, filtering, etc. are performed as needed.
(Embodiment 2)
FIG. 2 is a diagram illustrating a functional configuration of the relay apparatus according to the second embodiment.

The relay apparatus includes a plurality of demodulation units 201, a plurality of Fourier transform units 202, a plurality of carrier information determination units 203, an equalization synthesis unit 204, a determination unit 205, an inverse Fourier transform unit 206, a guard insertion unit 207, and a modulation unit 208. A plurality of reception signals are input from a plurality of reception antennas, and a transmission signal is output to the transmission antenna.
A plurality of demodulation units 201, a plurality of Fourier transform units 202, each carrier information determination unit 203, an inverse Fourier transform unit 206, a guard insertion unit 207, and a modulation unit 208 are the same as those described in the first embodiment of the present invention. This is a function, and the description is omitted.

The equalization / combination unit 204 performs channel characteristic estimation similar to that of the equalization unit of the first embodiment for each branch that processes a plurality of reception inputs in the relay apparatus, and then equalizes and combines each branch. Go and consolidate into one. This equalization synthesis process is performed by the maximum ratio synthesis method, and if necessary for synthesis, timing adjustment of the synthesized signal is also performed.
The determination unit 205 has substantially the same function as the determination unit in the first embodiment, except that the carrier information determination unit output of each branch is input, and the combined carrier information is generated and used. To make the above-mentioned determination.

(Embodiment 3)
FIG. 11 is a flowchart showing a processing procedure of the relay method according to the third embodiment.
The relay method includes a demodulation step S11, a Fourier transform step S12, a carrier information determination step S13, an equalization step S14, a determination step S15, an inverse Fourier transform step S16, a guard insertion step S17, and a modulation step S18. Is the processing of each unit in the first embodiment. That is, the demodulation step S11 is the demodulation unit 101, the Fourier transform step S12 is the Fourier transform unit 102, the carrier information determination step S13 is the carrier information determination unit 103, the equalization step S14 is the equalization unit 104, the determination step S15 is the determination unit 105, Since the inverse Fourier transform step S16 performs the same processing as the inverse Fourier transform unit 106, the guard insertion step S17 performs the same processing as the guard insertion unit 107, and the modulation step S18 performs the same processing as the modulation unit 108, description thereof is omitted.

(Embodiment 4)
FIG. 12 is a flowchart showing a processing procedure of the relay method according to the fourth embodiment.
The relay method includes a demodulation step S21, a Fourier transform step S22, a carrier information determination step S23, an equalization step S24, a determination step S25, an inverse Fourier transform step S26, a guard insertion step S27, and a modulation step S28. Is the processing of each part in the second embodiment. That is, the demodulation step S21 is a plurality of demodulation units 201, the Fourier transform step S22 is a plurality of Fourier transform units 202, the carrier information determination step S23 is a plurality of carrier information determination units 203, the equalization synthesis step S24 is an equalization synthesis unit 204, The determination step S25 performs the same processing as the determination unit 205, the inverse Fourier transform step S26 performs the same processing as the inverse Fourier transform unit 206, the guard insertion step S27 performs the same processing as the guard insertion unit 207, and the modulation step S28 performs the same processing as the modulation unit 208.

(Embodiment 5)
The functional configuration of the relay apparatus according to the fifth embodiment is the same as that in FIG. 1 in the first embodiment, and the only difference from the first embodiment is the processing in the carrier information determination unit 103. The description of the configuration is omitted.
FIG. 15 shows the configuration of carrier information determination section 1201 that replaces carrier information determination section 103 in the fifth embodiment. The carrier information determination unit 1201 includes a carrier type determination unit 901, a hierarchy information setting unit 1202, a frequency interleave unit 1203, and a hierarchy information determination unit 1204. Since the carrier type determination unit 901 is the same processing as that of the first embodiment, description will be made. Is omitted.

  Hierarchy information setting section 1202 generates an array of data carriers before frequency interleaving. That is, the number of data segments belonging to each layer and the modulation method are extracted from the layer information on the TMCC decoded from the TMCC carrier, and the data segment number of the same layer is determined from the number of data segments in each layer according to the segment arrangement in FIG. Then, a data carrier having the same modulation method as information is prepared at the position of the data carrier belonging to the data segment of the same hierarchy.

The frequency interleaving unit 1203 processes the data carrier array composed of the data segments of all layers from the layer information setting unit 1202 by the frequency interleaving described in Embodiment 1 shown in FIG. 5, and has frequency-interleaved modulation information. Generate an array of data carriers.
The hierarchy information determination unit 1204 associates the data carrier array having the modulation information generated by the frequency interleaving unit 1203 with the array made up of data carriers among the carriers determined by the carrier type determination unit 901, thereby performing frequency interleaving. The modulation method of each data carrier specified is specified.

Then, the carrier type obtained by the carrier type determination unit 901 and the obtained modulation scheme are assigned, for example, a flag string that is 1 when applicable, and 0 when not applicable, and a value assigned to each type and modulation type. By expressing it in a table or the like, it is output as a whole.
Carrier information is determined by the above processing, and information indicating the type of carrier and the modulation method is output as carrier information.

(Embodiment 6)
The functional configuration of the relay apparatus according to the sixth embodiment is the same as that in FIG. 2 in the second embodiment, and the only difference from the second embodiment is the processing in the plurality of carrier information determination units 203. Description of the functional configuration is omitted.
The plurality of carrier information determination units 203 use the carrier information determination unit 1201 of the fifth embodiment in each branch.

(Embodiment 7)
The flowchart showing the processing procedure of the relay method according to the seventh embodiment is the same as FIG. 11 in the third embodiment, and the only difference from the third embodiment is the processing in the carrier information determination step S13. The description of the functional configuration other than is omitted.
The processing in carrier information determination step S13 uses the processing of carrier information determination unit 1201 in the fifth embodiment.

(Embodiment 8)
The flowchart showing the processing procedure of the relay method according to the eighth embodiment is the same as FIG. 12 in the fourth embodiment, and the only difference from the fourth embodiment is the processing in the carrier information determination step S23. The description of the functional configuration other than is omitted.
The processing in carrier information determination step S23 uses the processing of carrier information determination unit 203 in the sixth embodiment.

(Embodiment 9)
FIG. 16 is a flowchart showing a processing procedure of the relay method according to the ninth embodiment.
First, in the transmission step S31, an OFDM signal in a predetermined band is transmitted from a transmission antenna or a transmission end of a master station or a relay station serving as a transmission source to a first transmission path arbitrarily configured by radio or wire. Transmit as a transmission signal.

Secondly, in the relay reception step S32, a transmission signal including a transmission signal from one of the transmission sources is received as a relay reception signal at the reception antenna or reception end of the relay station.
Thirdly, in the relay step S33, any relay method such as the relay method of Embodiment 3 or 4 or 7 or 8 or a wraparound canceller, frequency conversion, filtering, amplification or the like is performed on the relay reception signal to perform relay processing. Output a signal.

Fourth, in the relay transmission step S34, the relay transmission signal is relayed as another transmission source from the transmission antenna or transmission end of the relay station to the second transmission path arbitrarily configured by radio or wire. Send as.
If necessary, the relay reception step S32 for receiving the transmission signal including the relay transmission signal, the relay described above in any combination of any embodiment, any relay method, frequency conversion, filtering, amplification, etc. Step S33 and the above relay transmission step S34 to another transmission line may be repeated any number of times.

Finally, in the reception step S35, the transmission antenna including the relay transmission signal is received at the reception antenna or reception end of the receiving station such as home, and the content such as video, audio, data, etc. is obtained by performing demodulation, decoding, etc. Playback, recording, etc.
Needless to say, the present invention is not limited to the contents described in the above embodiments. That is,
(1) In all the embodiments, the signal to be relayed is not limited to the ISDB-T system or OFDM signal, and any signal can be used for reception or relay as long as it is an orthogonal division multiplexed signal capable of layered transmission. May be. For example, the signal may be a signal conforming to the DMB-T system, or may be an orthogonal modulation signal regarded as a signal divided and multiplexed by phase. At this time, any necessary processing may be added, any processing that needs to be changed may be modified, and any unnecessary processing may be deleted according to the quadrature modulation signal. Further, terms such as carrier, symbol or guard may be another term having the same meaning depending on the corresponding relay method and signal. In reception or relay, the input signal is not limited to the reception antenna, and the output signal is not limited to the transmission antenna.

  (2) The demodulating units 101 and 201 of the first, second, fifth and sixth embodiments convert the selected signal into at least one intermediate frequency band before performing the complex baseband signal, and then perform orthogonal demodulation. The baseband signal may be output as a desired band signal, and the output signals of any means after the Fourier transform means 102 and 202 may be input for easy demodulation.

  (3) In the demodulation unit 201 of the second and sixth embodiments, any information necessary for demodulation such as the same carrier frequency or sampling frequency or symbol pulse may be used between any branches. Further, the carrier frequency, phase, sampling frequency, phase, symbol pulse, or the like may be obtained by combining or the like such as maximum ratio combining between any branches, and this result may be used in any branch.

  (4) In the first, second, fifth, and sixth embodiments, the Fourier transforming means 102 and 202 are orthogonal transforms using any orthogonal transform in which the carrier is an arbitrary orthogonal signal or orthogonal function instead of the discrete Fourier transform. It may be a means. For example, discrete cosine transform or discrete wavelet transform may be used. Similarly, the inverse Fourier transform units 106 and 206 may be orthogonal transform units using any orthogonal transform instead of the discrete inverse Fourier transform. Further, the Fourier transform means 102 and 202 or the discrete Fourier transform means 106 and 206 may be omitted, and may be any process. For example, any filter or the like may be used in a relay device for a signal of only primary modulation.

  (5) In the carrier information determination means 103, 203, and 1201 of the first, second, fifth, and sixth embodiments, the order of determining the carrier type and the hierarchy information may be reversed, and the determination is performed at any time. It does not have to be provided, that is, it may not be provided, it may be determined from any type in the determination of the type, and it may be determined from any level in the determination of the hierarchy information, and the type and the hierarchy information are output separately. May be. Further, in the carrier type determination unit 901, the carrier type is not limited to the above, and any type may be determined. For example, the invalid carrier, CP, SP, TMCC, Any type such as AC may be determined in advance, and the result may be retained and used to determine the type. Carriers other than invalid carriers may be, for example, noise, interference, or interference The carrier may be determined as an invalid carrier when the reliability is low due to, for example, and any type of invalid carrier, CP, SP, TMCC, or AC may not be determined at an arbitrary time. In other words, the carrier type The determination unit 901 does not have to be at an arbitrary time, but also determines the type for each symbol that is divided and multiplexed by frequency, phase, time, code, space, or the like. Any carrier of another type may be added to the determination, and when the information indicating the type is included in any symbol or carrier or guard, the carrier type is determined based on the information. Also good. The frequency deinterleaving unit 902 is not limited to the above-described mathematical formula and the like, but may obtain a data carrier number before frequency interleaving, may correspond to frequency interleaving processing by any conversion, and frequency interleaving Data carrier number before being processed, or at least a part of deinterleaving processing of any pattern depending on the number of carriers, for example, is held in advance, and the result is used for deinterleaving. Any deinterleave processing such as processing may be performed. For any division multiplexed signal including an OFDM signal, the carrier may be a carrier deinterleave as an orthogonal signal or an orthogonal function. Symbols that are time units, not carrier units In the case of interleaving in units, any deinterleaving processing that performs any deinterleaving processing in units of time or symbols may be performed, and division multiplexed signals that are interleaved not only in units of carriers but also in units of symbols are processed. In some cases, any carrier / symbol deinterleaving may be performed in which the carrier and the symbol are deinterleaved or the carrier or symbol is deinterleaved, and in addition, phase division multiplexing, code division multiplexing, or space division multiplexing Are interleaved with symbols that are also performed, a symbol on a phase, a symbol on a code used for code division multiplexing, or a space used for space division multiplexing Together with the symbols above If it is not necessary to deinterleave by carrier, symbol, phase, code, space, etc., it may be omitted at any time, in other words, the frequency deinterleave unit 902 may at any time. It does not have to be. For example, it may be determined that it is not necessary to perform deinterleaving when the process changes to a process that does not perform hierarchical transmission, and the process may be bypassed at an arbitrary time so as not to perform the deinterleaving process. Then, since interleaving and deinterleaving are inversely related to each other, a supplement to the frequency deinterleaving unit 902 may be used as a supplement to the frequency interleaving unit 1203. Further, the hierarchy information determination units 903 and 1204 and the hierarchy information setting unit 1202 may determine or set the hierarchy information based on any information other than the data carrier number and the TMCC, and the hierarchy information on the TMCC is integrated to the lower hierarchy. In addition to performing layer determination or setting based on the number of segments selected, for example, any layer determination or setting such as layer determination or setting by using as it is without integration, determination based on determination or setting information in the previous symbol, or setting The number of layers may be set, and not only the number of layers may be determined, but the layer information may be determined by setting a layer for each carrier on a symbol that is not limited to a segment. In other words, the modulation scheme may be determined or set from the division multiplexed signal itself. , It may not be exactly determined or arbitrarily set time. That is, when hierarchical information is included in any symbol or carrier or guard, etc., it may be determined or set based on it, or may be determined or set as the same hierarchical information for each time or division multiplexed symbol. The hierarchy information may be switched in units of time or symbols. Then, in the determination or setting processing, for example, the hierarchical information is, for example, so that decoding of convolutional coding performed in the upper station and time deinterleaving for returning the time interleaved signal to the signal before time interleaving can be performed. Any information such as a convolutional coding rate and an interleave length on the TMCC may be used. Finally, in the carrier information determination means 103, 203, and 1201, the carrier type determination unit 901, the frequency deinterleave unit 902, the layer information setting unit 1202, the frequency interleave unit 1203, and the layer information determination units 903 and 1204 are processed in any order. In addition to the processing, any processing included in them may be performed together. If there are other necessary processing and input / output, add any processing unit or input / output that performs the processing. May be. For example, when there is hierarchical information spread using a code division multiplexing technique in the guard signal, a despreading unit that performs a despreading process that is a reverse conversion of the spreading process may be provided.

  (6) In the carrier information determination means 203 and 1201 of Embodiments 2 and 6, the carrier information determination means of Embodiment 1 or 5 may be arbitrarily combined for each branch, and only some branches are included. Alternatively, the carrier information determination means between any branches may be combined into one, and the result of selecting or combining the carrier information between any branches may be output.

  (7) The equalization unit 104 of Embodiments 1 and 5 and the equalization synthesis unit 204 of Embodiments 2 and 6 may output at least a part of the carrier information. For example, the least square method is used. Then, the inverse characteristic of the transmission line characteristic is estimated, and equalization may be performed by complex multiplication of the input signal and the transmission line characteristic in the frequency domain. Further, the transmission path characteristics may be estimated based on any information other than the carrier type or the hierarchy information. For example, the transmission path characteristics may be estimated based on the data carrier itself or a guard signal.

  (8) In the equalization unit 104 of the first and fifth embodiments, the first transmission path characteristic is estimated from the reference signal using the carrier type, and the carrier between the reference signals of the first transmission path characteristic is Using a plurality of first transmission path characteristics estimated from different symbols, interpolation is performed on at least one of the frequency axis and the time axis to estimate the second transmission path characteristics, and the like based on the second transmission path characteristics. The equalization may be performed by estimating the output signal directly without estimating the transmission path characteristics.

  (9) In equalization combining section 204 in Embodiments 2 and 6, the first transmission path characteristic is estimated from the reference signal using the carrier type for each branch, and the first transmission path characteristic reference signal The second channel characteristic is estimated by interpolating at least one of the carriers between the frequency axis and the time axis using a plurality of first channel characteristics estimated from different symbols. Equalization and synthesis between branches may be performed according to transmission path characteristics. Also, any combining method other than maximum ratio combining may be used, and carrier information may be output by performing any combining process between arbitrary branches. Further, the transmission path characteristics may be estimated based on any information other than the carrier type or the hierarchy information. For example, the transmission path characteristics may be estimated based on the data carrier itself or a guard signal. Then, equalization and synthesis may be performed by directly estimating the output signal without estimating the transmission path characteristics.

  (10) In the determination units 105 and 205 of the first, second, fifth, and sixth embodiments, signal quality evaluation after each branch or equalization or combination is performed, and the presence / absence of determination is switched for each carrier, for example, using the result. Or any determination process such as determination to a predetermined value, or at least one of the carrier information determination unit outputs of each branch may be input or input by any combination between arbitrary branches, Input carrier information of at least one branch before equalization or synthesis from the equalization unit 104 or equalization synthesis unit 204, carrier information after equalization of any branch or after synthesis between arbitrary branches, The reference signal may be replaced with a known reference signal instead of being determined. The determination may be made based on any information other than the carrier type or the hierarchy information. For example, the determination may be performed by performing soft decision or the like on the convolutionally encoded data by Viterbi decoding, or may be performed based on a guard signal or the like. Furthermore, when the equalization unit 104 and the equalization synthesis unit 204 collectively perform equalization or equalization and synthesis and determination, the determination units 105 and 205 may be omitted. For example, any processing such as aperture correction may be omitted. May be added.

(11) The guard insertion units 107 and 207 of the first, second, fifth and sixth embodiments may be omitted when relaying a signal without guard, and the guard signal is one of symbols in the time domain. Any signal other than the part may be used. For example, it may be a PN signal, a signal modulated by a PN signal, or the like.
(12) In the modulation units 108 and 208 of the first, second, fifth and sixth embodiments, the input signal may be converted into a baseband, or may be converted into a first intermediate frequency band or orthogonally modulated, It may be converted into at least one band including the baseband or the first intermediate frequency band, or may be output after being converted into a desired band, and for example, any processing such as aperture correction may be added.

(13) Supplement regarding the relay apparatus of the present invention may be realized as a relay method including a method equivalent to each procedure of relay processing performed by the relay apparatus, or may be supplemented regarding the relay method of the present invention.
(14) The relay process performed by the relay apparatus described in the first, second, fifth and sixth embodiments is stored in a memory as a program, and the relay process is performed using a CPU or the like, thereby realizing the object of the present invention. May be. That is, the present invention may be such a program. Moreover, the digital signal which consists of the said program may be sufficient. Further, the program or the digital signal may be recorded on a computer-readable recording medium such as a CD-ROM.

  (15) At least a part of the relay devices according to the first, second, fifth, and sixth embodiments is configured using at least one integrated circuit such as an IC, LSI, FPGA, DSP, or reconfigurable processor. Also good. In other words, any part constituting the relay device or a combination thereof may be integrated into an integrated circuit, and the relay device may be realized using any number or types of integrated circuits. You may relay together with the program used.

(16) At least a part of the relay apparatuses according to the first, second, fifth, and sixth embodiments may be integrated using a technique different from the semiconductor technique. For example, an optical signal processing integrated circuit may be used.
(17) The relay apparatuses according to Embodiments 1 and 2, and 5 and 6 may receive and perform orthogonal division multiplexing signals transmitted using a plurality of channels, respectively, and may relay a plurality of channels. It may be a part of the component of the apparatus, and not only orthogonal division multiplexed signals that are frequency division multiplexed like multiple channels, but also phase division multiplexing, time division multiplexing, code division multiplexing, space division multiplexing, etc. Sometimes, the orthogonal division multiplexed signal in which they are combined may be relayed. Further, the transmission signal to be relayed may be similarly output as a signal that is divided and multiplexed by combining frequency, phase, time, code, space, or the like. That is, the signal transmitted by the MIMO technology or the like may be relayed, and in this case, each unit configuring the relay device is different from the signal processed there, and the unit that processes the received or transmitted signal, Information or signals included in each process may be communicated, or the process may be shared by multiplexing or the like.

  The relay apparatus, circuit, method, and program according to the present invention can be applied to an apparatus, circuit, method, and program for receiving or relaying an orthogonal division multiplexed signal that has been hierarchically transmitted by radio or wire, and particularly terrestrial digital broadcasting. It is useful for receiving and relaying devices and circuits, methods and programs.

Configuration of Embodiment 1 of Relay Device in the Present Invention Configuration diagram of Embodiment 2 of relay device in the present invention Diagram of segments in digital terrestrial broadcasting Layout of segment numbers on the transmission spectrum in terrestrial digital broadcasting Configuration diagram of frequency interleave processing in terrestrial digital broadcasting Illustration of inter-segment interleaving in terrestrial digital broadcasting Illustration of intra-segment carrier rotation in terrestrial digital broadcasting Configuration diagram of guard signals in digital terrestrial broadcasting Configuration diagram of carrier information determination unit in the present invention Configuration diagram of frequency deinterleaving in the present invention The flowchart figure of Embodiment 3 of the relay method in this invention. The flowchart figure of Embodiment 4 of the relay method in this invention First configuration diagram of relay device in conventional example Second configuration diagram of relay device in conventional example Configuration diagram of carrier information determination unit in the present invention Flowchart diagram of Embodiment 9 of the relay method in the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Demodulation part 102 Fourier transform part 103 Carrier information determination part 104 Equalization part 105 Determination part 106 Inverse Fourier transform part 107 Guard insertion part 108 Modulation part 201 Multiple demodulation part 202 Multiple Fourier transform part 203 Multiple carrier information determination part 204 Equalization synthesis unit 205 Determination unit 206 Inverse Fourier transform unit 207 Guard insertion unit 208 Modulation unit 500 Frequency interleaving 501 Inter-segment interleaving 502 Intra-segment carrier rotation 503 Intra-segment carrier randomization 901 Carrier type determination unit 902 Frequency deinterleaving unit 903 Hierarchical information determination Section 911 Intra-segment carrier derandomization 912 Intra-segment carrier derotation 913 Deinterleave between segments 1001 Receiving section 10 2 Relay processing unit 1003 Transmitting unit 1004 Synchronous circuit unit 1011 Receiving antenna 1012 Down converter 1013 A / D converter 1014 Quadrature detector 1015 Discrete Fourier transformer 1016 Equalizing circuit 1017 Judgment circuit 1018 Pilot insertion circuit 1019 Discrete inverse Fourier transformer 1020 Quadrature modulator 1021 D / A converter 1022 Up converter 1023 Transmitting antenna 1101 Receiving unit 1102 Diversity combining circuit unit 1103 Carrier data combining coefficient calculating unit 1104 Relay processing unit 1105 Transmitting unit 1106 Synchronous circuit unit 1111 Antenna 1112 Down converter 1113 A / D Converter 1114 Quadrature detector 1115 Discrete Fourier transformer 1116 Frequency response calculation circuit 1117 Frequency weighted coefficient calculation circuit 1118 Rear data synthesis circuit 1119 Determination circuit 1120 Pilot insertion circuit 1121 Discrete inverse Fourier transformer 1122 Quadrature modulator 1123 D / A converter 1124 Up converter 1125 Transmit antenna 1201 Carrier information determination unit 1202 Hierarchical information setting unit 1203 Frequency interleaving unit 1204 Hierarchical information Judgment part

Claims (23)

In a relay device for relaying a hierarchical orthogonal division multiplexed signal,
Demodulation means for demodulating as a digital desired band signal by quadrature demodulation after selecting the input of the relay device;
Orthogonal transform means for orthogonally transforming the demodulated data;
Carrier information determination means for determining carrier type or layer information on the symbol after the orthogonal transformation;
Equalization means for equalizing the carrier after the orthogonal transformation based on the carrier information determination result;
And a determining unit that determines a carrier transmitted from the equalized carrier based on the carrier information determination result. In a relay device that relays a hierarchical orthogonal division multiplexed signal, the relay device has a plurality of reception inputs,
Demodulating means for demodulating each of the received inputs as a desired digital band signal by orthogonal demodulation after channel selection;
Orthogonal transform means for orthogonally transforming each demodulated data;
Carrier information determination means for determining carrier type or layer information on each symbol after the orthogonal transformation;
Equalization combining means for equalizing and combining each of the carriers after orthogonal transformation based on at least one of each of the carrier information determination results;
And a determination unit that determines a carrier transmitted from the equalized and combined carrier based on at least one of the carrier information determination results. In a relay device that relays a hierarchical orthogonal division multiplexed signal, the relay device has a plurality of reception inputs,
Demodulating means for demodulating each of the received inputs as a desired digital band signal by orthogonal demodulation after channel selection;
Orthogonal transform means for orthogonally transforming each demodulated data;
Carrier information determination means for determining the type or layer information of a carrier on any of the symbols after orthogonal transformation among a plurality of carriers on the symbol after orthogonal transformation;
Equalization combining means for equalizing and combining each of the carriers after orthogonal transformation based on the carrier information determination result;
A determination unit configured to determine a carrier transmitted from the carrier after the equalization combining based on the carrier information determination result. The relay device further includes:
The relay apparatus according to any one of claims 1 to 3, further comprising inverse orthogonal transform means for performing inverse transform of the orthogonal transform on the output of the relay apparatus. The relay device further includes:
5. The relay apparatus according to claim 1, further comprising guard insertion means for inserting a guard signal into the relay apparatus output. The relay device further includes:
6. The relay apparatus according to claim 4, further comprising a modulation unit that orthogonally modulates and outputs the output of the relay apparatus to a desired band signal. In a relay circuit for relaying a hierarchical orthogonal division multiplexed signal,
After selecting the input of the relay circuit, a demodulation circuit that performs quadrature demodulation and demodulates as a desired digital band signal;
An orthogonal transform circuit that orthogonally transforms the demodulated data;
A carrier information determination circuit that determines the type or layer information of the carrier on the symbol after the orthogonal transformation;
An equalization circuit for equalizing the carrier after the orthogonal transformation based on the carrier information determination result;
And a determination circuit for determining a carrier transmitted from the equalized carrier based on the carrier information determination result. In a relay circuit for relaying a hierarchical orthogonal division multiplexed signal, the relay circuit has a plurality of reception inputs,
A demodulation circuit that demodulates each of the received inputs as a digital desired band signal by orthogonal demodulation after channel selection;
An orthogonal transform circuit for orthogonally transforming each demodulated data;
A carrier information determination circuit that determines the type or layer information of a carrier on each symbol after the orthogonal transformation;
An equalization combining circuit for equalizing and combining each of the carriers after orthogonal transformation based on at least one of the carrier information determination results;
And a determination circuit for determining a carrier transmitted from the carrier after equalization combining based on at least one of the carrier information determination results of each of the carrier information determination results. In a relay circuit for relaying a hierarchical orthogonal division multiplexed signal, the relay circuit has a plurality of reception inputs,
A demodulation circuit that demodulates each of the received inputs as a digital desired band signal by orthogonal demodulation after channel selection;
An orthogonal transform circuit for orthogonally transforming each demodulated data;
A carrier information determination circuit that determines a type or layer information of a carrier on any of the symbols after orthogonal transformation among a plurality of carriers on the symbol after orthogonal transformation;
An equalizing and synthesizing circuit for equalizing and synthesizing each orthogonally transformed carrier based on the carrier information determination result;
A determination circuit that determines a carrier transmitted from the carrier after the equalization combining based on the carrier information determination result. The relay circuit further includes:
The relay circuit according to any one of claims 7 to 9, further comprising an inverse orthogonal transform circuit that performs an inverse transform of the orthogonal transform on the relay circuit output. The relay circuit further includes:
The relay circuit according to claim 7, further comprising a guard insertion circuit that inserts a guard signal into the relay circuit output. The relay circuit further includes:
The relay circuit according to claim 10 or 11, further comprising: a modulation circuit that orthogonally modulates the output of the relay circuit to a desired band signal and outputs the result. In a relay method for relaying a hierarchical orthogonal division multiplexed signal,
A demodulation step of receiving and selecting the orthogonal division multiplexed signal, performing orthogonal demodulation and demodulating as a digital desired band signal;
An orthogonal transform step of orthogonally transforming the demodulated data;
A carrier information determination step of determining the type or layer information of the carrier on the symbol after the orthogonal transformation;
An equalization step of equalizing the carrier after the orthogonal transformation based on the carrier information determination result;
A determination step of determining a carrier transmitted from the equalized carrier based on the carrier information determination result. In a relay method for relaying a hierarchical orthogonal division multiplexed signal,
A demodulating step of receiving a plurality of the orthogonal division multiplexed signals, each selecting a channel, performing orthogonal demodulation and demodulating as a digital desired band signal;
An orthogonal transform step of orthogonally transforming each demodulated data;
A carrier information determination step for determining a type or layer information of a carrier on each symbol after the orthogonal transformation;
An equalizing and combining step of equalizing and combining the respective carriers after orthogonal transformation based on at least one of the carrier information determination results of each of the carrier information determination results;
A determination step of determining a carrier transmitted from the carrier after the equalization combining based on at least one of each of the carrier information determination results. In a relay method for relaying a hierarchical orthogonal division multiplexed signal,
A demodulating step of receiving a plurality of the orthogonal division multiplexed signals, each selecting a channel, performing orthogonal demodulation and demodulating as a digital desired band signal;
An orthogonal transform step of orthogonally transforming each demodulated data;
A carrier information determination step of determining a type or layer information of a carrier on any of the symbols after orthogonal transformation among a plurality of carriers on the symbol after orthogonal transformation;
An equalizing and combining step for equalizing and combining the respective carriers after orthogonal transformation based on the carrier information determination result;
A determination step of determining a carrier transmitted from the carrier after the equalization combining based on the carrier information determination result. In a program for performing a relay process for relaying a hierarchical orthogonal division multiplexed signal,
A demodulation step of receiving and selecting the orthogonal division multiplexed signal, performing orthogonal demodulation and demodulating as a digital desired band signal;
An orthogonal transform step of orthogonally transforming the demodulated data;
A carrier information determination step of determining the type or layer information of the carrier on the symbol after the orthogonal transformation;
An equalization step of equalizing the carrier after the orthogonal transformation based on the carrier information determination result;
And a determination step of determining a carrier transmitted from the equalized carrier based on the carrier information determination result. In a program for performing a relay process for relaying a hierarchical orthogonal division multiplexed signal,
A demodulating step of receiving a plurality of the orthogonal division multiplexed signals, each selecting a channel, performing orthogonal demodulation and demodulating as a digital desired band signal;
An orthogonal transform step of orthogonally transforming each demodulated data;
A carrier information determination step for determining a type or layer information of a carrier on each symbol after the orthogonal transformation;
An equalizing and combining step of equalizing and combining the respective carriers after orthogonal transformation based on at least one of the carrier information determination results of each of the carrier information determination results;
And a determination step of determining a carrier transmitted from the carrier after equalization combining based on at least one of the carrier information determination results of each of the carrier information determination results. In a program for performing a relay process for relaying a hierarchical orthogonal division multiplexed signal,
A demodulating step of receiving a plurality of the orthogonal division multiplexed signals, each selecting a channel, performing orthogonal demodulation and demodulating as a digital desired band signal;
An orthogonal transform step of orthogonally transforming each demodulated data;
A carrier information determination step of determining a type or layer information of a carrier on any of the symbols after orthogonal transformation among a plurality of carriers on the symbol after orthogonal transformation;
An equalizing and combining step for equalizing and combining the respective carriers after orthogonal transformation based on the carrier information determination result;
A determination step of determining a carrier transmitted from the carrier after the equalization combining based on the carrier information determination result. The relay method further includes:
16. The relay method according to claim 13, further comprising an inverse orthogonal transform step of performing an inverse transform of the orthogonal transform after the relay method processing. The relay method further includes:
The relay method according to claim 13, further comprising a guard insertion step of inserting a guard signal after the relay method processing. The relay method further includes:
21. The relay method according to claim 19, further comprising a modulation step of performing quadrature modulation on a desired band signal after the relay method processing and outputting the signal. In a relay method for relaying a hierarchical orthogonal division multiplexed signal,
A relay reception step of receiving a transmitted signal including a transmission signal from at least one transmission source at a reception antenna or a reception end;
A relay step of processing a signal after reception using the relay method according to claim 13 or 14 or 15 or 19 or 20 or 21;
A relay transmission step of transmitting the signal processed in the relay step from a transmission antenna or a transmission end as another transmission source. In a relay method for relaying a hierarchical orthogonal division multiplexed signal,
A transmission step of transmitting a transmission signal from a transmission antenna or a transmission end of a transmission source;
A relay method comprising: a relay step of performing at least one relay using at least one relay method according to claim 22.

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