WO2002060141A1

WO2002060141A1 - Layered transmission reception device and transmission device

Info

Publication number: WO2002060141A1
Application number: PCT/JP2002/000476
Authority: WO
Inventors: Masatoshi Hamada
Original assignee: Masatoshi Hamada
Priority date: 2001-01-25
Filing date: 2002-01-23
Publication date: 2002-08-01

Abstract

A layered transmission reception device in which a first data series is transmitted with a signal space diagram whereas second and later data series is transmitted by using Feather transition. A re-modulated signal produced by re-modulating the data produced by modulating the first data series is subtracted from the sum signal of the received modulated signal by the first data series and the modulated signal by the second data series so as to extract/demodulate only a modulated signal by the second and later data series. Therefor it is possible to suppress the degradation of the error characteristics caused by the interference of the modulated signals by the data series. The error characteristics can be further improved either by controlling the amplitude of the re-modulated signal and adopting synchronous detection means as a demodulating means or by adopting a construction in which the code-to-code distance of the sum signal of the modulated signal by the first data series and the modulated signal by the second and subsequent data series is uneven.

Description

Specification

Hierarchical transmission system receiving device and transmitting device

Technical field

The present invention relates to a receiving apparatus and a transmitting apparatus that transmit a first data sequence by a signal space diagram and transmit the second and subsequent data sequences by feather transition or layered transmission by a space diagram.

Background art

As an example of a conventional technique, demodulation of a differential amplitude phase shift keying (DAPSK) signal conventionally known as a hierarchical transmission scheme as described in Reference 1 will be described.

FIG. 1 shows demodulation of a DAPSK signal as a hierarchical transmission method. FIG. 2 shows a signal space diagram and a feather transition of the DAPSK transmission. As shown in Fig. 2, the DAPSK signal transmits two QPSK signals with different amplitudes, and 2 bits / symbol in the QPSK signal space diagram and 1 bit / symbol in the difference in screw width, for a total of 3 bits Z Transmit symbol data. In the conventional receiver shown in Fig. 1, when demodulating 1 bit / symbol transmitted by the difference in amplitude, it is difficult for the receiver to secure the reference of the absolute value of the amplitude. Differential detection of 1-bit no-symbol differentially modulated signals transmitted with different amplitudes is performed. Specifically, when two consecutive bits of data are the same (0 or 11) in the transmitting device, two bits are transmitted by QPSK of the same amplitude, and the two consecutive bits of data are different.

(0 1 or 10), two bits are transmitted with different amplitudes QPSK. The receiver demodulates 2-bit nosymbols for QPSK demodulation, 1-bit Z symbols for amplitude differences, a total of 3 bits / symbol, and demodulates for 1-bit nosymbols with amplitude differences. In this case, two bits of data output the same (00 or 11), and if the amplitude of QPSK changes, the two bits of data output different (01 or 10). Reference 1 "WJ iVeber", "Differential encoding for multmle amplitude and phase shifit keying systems", IEEE Trans. Commun. Vol. COM-26, pp385-391, Mar. 1978 As described above, there is a technique in which a transmitting apparatus performs hierarchical transmission by a multivalued matching method and a receiving apparatus demodulates a plurality of multivalues.

In this transmission system, multi-valued mapping is performed so that the inter-code distance becomes uniform. Reference 2 Uesugi, et al .: "On Adaptive Modulation Bucket Data Transmission Using Hierarchical Demodulation", IEICE Technical Report of IEICE, RCS Technical Report, September 8, 2000.

The conventional hierarchical transmission scheme receiving apparatus demodulates at the same point a reception sample point of a modulation signal based on the first data sequence and a reception sample point of a modulation signal based on the second and subsequent data sequences. For this reason, if the received sample points of the modulated signal based on the first data sequence and the received sample points of the modulated signal based on the second and subsequent data sequences are different, the error characteristics deteriorate due to the influence of the respective modulated signals. There was a drawback to do. Similarly, in the case of a modulated signal in which the second and subsequent data sequences are transmitted by feather-transition, there is a disadvantage that the error characteristics are degraded due to the influence of each other's modulated signal.

The conventional hierarchical transmission scheme receiving apparatus uses differential detection like DASK demodulation. Differential detection has a disadvantage that error characteristics are deteriorated as compared with synchronous detection. Also, in differential detection, it is necessary to distinguish between 0 and 11 and between 0 and 10, so it is necessary to transmit a signal that distinguishes between these. Since the transmission device of the conventional hierarchical transmission method equally distributes the inter-code distance between the addition signal of the modulation signal of the first data sequence and the addition signal of the modulation signal of the second and subsequent data sequences, There is a disadvantage that the error rate of the first data sequence is greatly deteriorated as compared with the case where the sequence is not transmitted. It is an object of the present invention to provide an error characteristic generated by interference between modulated signals even when reception sample points of a modulation signal based on the first data sequence are different from reception sample points of a modulation signal based on the second and subsequent data sequences. Receiver capable of demodulation with very small degradation. Similarly, it is an object of the present invention to provide a receiver capable of performing demodulation with very little deterioration in error characteristics even in the case of a modulated signal in which the second and subsequent data sequences are transmitted by feather transition.

Another object of the present invention is to provide a receiving apparatus that can perform synchronous detection and can improve error characteristics as compared with differential detection.

Furthermore, an object of the present invention is to compare the modulated signal of the first data sequence with the added signal of the modulated signal of the second and subsequent data sequences to make the inter-code distance of the first data sequence uniform. An object of the present invention is to provide a receiving device and a transmitting device capable of reducing error characteristic degradation.

Disclosure of the invention

The receiving apparatus according to the present invention comprises: means for remodulating a data sequence obtained by demodulating a modulated signal based on a first data sequence; and a means for modulating a data sequence based on a first data sequence and a second data sequence. Modulated signal and second data based on the first data sequence obtained by adding the modulated signal

The means for subtracting the re-modulated signal from the added signal of the modulated signal of the series extracts the modulated signal of the second and subsequent data series. The receiving apparatus according to the present invention includes means for performing transmission permission / prohibition of the second and subsequent data sequences by using a pattern of the first data sequence in the transmission device; and a first apparatus for transmitting / receiving the second and subsequent data sequences in the reception device. Means for storing a signal obtained by remodulating a data sequence; and, when the data obtained by demodulating the first data sequence has a pattern allowing transmission of the second and subsequent data sequences, the received signal modulated by the first data sequence and the second The means for subtracting the stored remodulated signal from the added signal of the modulated signal due to the second data series extracts the modulated signal due to the second and subsequent data series. The receiving apparatus according to the present invention may further comprise: a receiver that modulates the amplitude of a signal obtained by remodulating data obtained by demodulating the first data sequence by using a second signal modulated by the first data sequence received at a sampling point for demodulating the first data sequence; Synchronous detection is performed by means of controlling the amplitude of the addition signal of the modulation signal based on the data sequence. The transmitting apparatus of the present invention is configured such that an addition signal of the modulated signal based on the first data sequence and the modulated signal based on the second and subsequent data sequences forms the second and subsequent data sequences at sample points of the first data sequence in reception. A means for generating a modulation signal based on the second and subsequent data sequences by means for reducing the modulation signal to 0 is provided. In the transmission device of the present invention, the inter-code distance between the modulated signal based on the first data sequence and the sum signal of the modulated signals based on the second and subsequent data sequences is not equal, and the inter-code distance of the first data sequence is increased. Means for allocating to reduce the inter-code distance of the second and subsequent data sequences reduces error characteristic degradation of the first data sequence.

Brief description of the drawings.

FIG. 1 is a diagram showing an example of a conventional hierarchical transmission system receiving apparatus, FIG. 2 is a diagram showing a signal space diagram and a feather transition of the conventional hierarchical transmission, and FIG. FIG. 4 is a diagram illustrating a receiving device according to the present invention, FIG. 4 is a diagram illustrating a transmitting device according to the present invention, FIG. 5 is a diagram illustrating a receiving device according to the present invention, and FIG. FIG. 7 is a diagram illustrating a receiving device according to the present invention, FIG. 8 is a diagram illustrating a receiving device according to the present invention, and FIG. 9 is a diagram illustrating a receiving device according to the present invention. FIG. 10 is a diagram showing a speech device, and FIG. 10 is a diagram showing a receiving device according to the present invention. FIG. 11 is a diagram showing a signal space diagram and a feather transition at the output of the transmitting device according to the present invention, and FIG. 12 is a diagram showing a signal space diagram and a feather transition at the output of the transmitting device according to the present invention. FIG. 13 is a diagram showing a signal space diagram and a feather transition at the output of the transmitting device according to the present invention. FIG. 14 is a diagram showing a demodulation error characteristic according to the present invention. FIG. 15 is a diagram showing a demodulation error characteristic according to the present invention, FIG. 16 is a diagram showing a demodulation error characteristic according to the present invention, and FIG. 17 is a diagram showing a demodulation error characteristic according to the present invention. FIG. 18 is a diagram illustrating a demodulation error characteristic according to the present invention, and FIG. 19 is a diagram illustrating a demodulation error characteristic according to a conventional technique. ,

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 3 shows an example of a hierarchical receiving apparatus for receiving the modulated signal of the transmitting apparatus shown in FIG. 4 as an embodiment of the present invention.

Since the transmitting apparatus shown in FIG. 4 linearly adds the modulated signal based on the first data sequence and the modulated signal based on the second and subsequent data sequences and transmits the resultant signal, the demodulation shown in FIG. The modulated signal of the second data sequence is demodulated from the modulated signal of the second data sequence, and the modulated signal of the first data sequence and the modulated signal of the second data sequence are obtained by remodulating the demodulated first data sequence. From the sum signal of

Demodulated by canceling the modulated signal. The modulated signal based on the first data sequence is sampled through a reception filter 1 having an impulse response of [Expression 2], which is the sum signal [Expression 1] of the modulated signal based on the first data sequence and the modulated signal based on the second data sequence. Sampling at points 2 This sampling signal

[Equation 3] is converted by Detection 3, threshold-based judgment and demapping are performed, and demodulated data

[Equation 4] is output.

[Equation 1] ^ (+ ^, (

[Equation 2] h _R — ”

[Equation 3] r „— _main = a _n _ _main + jb _{n main}

[Equation 4]

For the second and subsequent data series, the demodulated data of the first data series [Equation 5] is re-modulated 4 and the impulse response is obtained using the re-modulated signal [Equation 7] obtained through the transmission filter 5 of [Equation 6]. The signal [Equation 9] obtained by canceling the modulation signal by the first data series 7 from the addition signal [Equation 8] of the modulation signal by the first data series and the modulation signal by the second data series delayed 6 obtain. This signal is passed through a reception filter 8 whose impulse response is expressed by the following equation (10), and the signal (Equation 11) sampled at the sampling points 9 is detected by the detection 10, judged by the threshold, de-mapped, and demodulated data 1 2] is output, and it is determined from the demodulated data of the first data sequence [Equation 13] whether transmission of the second and subsequent data sequences is possible or not. In the case of, write to buffer memory 12.

[Equation 5] (d _{n mai} „„ _{+ mai} J

[Equation 6] „

(Equation 7) Ut)

[Equation 8] S _mai „+ S _sub

(Equation 9) t)

[Equation 10] h _{R sub} (t)

[Equation 1 1] — _sub = d „_ _sub + jb _n _ _sub [Equation 1 2]

[Formula 1 3] (— “, ₊ then“)

FIG. 4 shows an embodiment of a transmitting apparatus, in which a modulated signal based on a first data sequence and a modulated signal based on a second and subsequent data sequences are linearly added.

In FIG. 4, the first data sequence is mapped to QPSΚ by two consecutive bits of the transmission data [Equation 14] by the modulation 51, and according to the mapping, the complex signal which becomes [Equation 15] The transmission signal 52 is generated by the transmission filter 52 whose impulse response is expressed by the following equation. The data sequence of the second and subsequent data is transmitted from the buffer memory 54 by a signal that controls whether or not the transmission of the second and subsequent data sequences is possible according to the transmission data of the first data sequence. 0] is generated, the AS マッピング is mapped by the modulation 55, and a complex signal [Equation 22] is generated according to the mapping according to [Equation 21], and the impulse response is represented by the transmission filter 5 6 of [Equation 23]. Generates the transmission signal (Equation 24).

Equation 1 4] (d _n ,, Equation 1 5] mam = 1 Equation (1) 6] _{_{c "_ main = a n ^}} main + jb n _

Equation 1 7) h _{T main} (t)

Equation 1 8) _a (t)

Equation 1 9 j (d _n ^ _main , d _{n +} _ _main )

Equation 2 0] d „ _sub Equation 2 1] c„ Equation 2 2] c _n one _sub = a _n _ _sub + jb „_ _sub

Formula 2 3) U

Equation 2 4] s _sub (f) Fig. 5, in a third diagram showing an embodiment of a receiving device, an embodiment for controlling the amplitude of the re-modulated signal [Equation ² 5]. As shown in Fig. 5, the amplitude of the signal obtained by sampling the signal 13 obtained by adding the modulated signal of the first data sequence and the modulation signal of the second data sequence [Equation 26] at the reception sampling points of the first data sequence The detection control 14 detects the amplitude of the expression 26 and multiplies the amplitude by 15 with the remodulated signal expression 25.

[Equation 2 5] s _main (t)

[Equation 2 6] s _main (t) + _Ssub (t) FIG. 6 shows an embodiment of the receiving apparatus. In the transmitting apparatus shown in FIG. 4, the second and subsequent data series are _converted into the first data series pattern. In the receiving apparatus shown in FIG. 3, a signal obtained by remodulating the first data sequence that can be transmitted by the second and subsequent data sequences is stored in the receiving apparatus shown in FIG. 3, and the first data sequence is stored. The demodulated data is the second and subsequent data

By subtracting the stored re-modulated signal generation 16 from the sum signal of the received modulated signal of the first data sequence and the received modulated signal of the second data sequence when the sequence is a pattern that allows transmission. , And extracts a modulated signal based on the second and subsequent data sequences. FIG. 7 shows an embodiment of the receiving apparatus, in which the transmitting apparatus shown in FIG. 4 repeats the period for transmitting only the first data sequence, and the receiving apparatus shown in FIG. The reference signal is detected during the period in which only the first data sequence is transmitted from the data obtained by demodulating the sequence, and the amplitude detection and control is performed by ANDing the sample of the first data sequence with the reference signal period extraction. In this method, the amplitude of the signal obtained by adding the modulation signal of the first data sequence and the modulation signal of the second data sequence is detected, and the amplitude of the signal obtained by remodulating the first data sequence is controlled by multiplication 21. It is. FIG. 8 shows an embodiment of the receiving apparatus. In the receiving apparatus shown in FIG. 7, reference signal detection 23 is performed in a period during which only the first data sequence is transmitted from the data obtained by demodulating the first data sequence, Amplitude detection 25 is performed by ANDing the sample 22 of the first data series with the reference signal period extraction 24, and threshold information is generated from the amplitude detection 25 to be used as the threshold for detecting the second and subsequent data series. Things. FIG. 9 shows an embodiment of a receiving apparatus, in which data obtained by demodulating a modulated signal based on a first data sequence is subjected to error correction 26 and error-corrected data is re-modulated. FIG. 10 is an embodiment of a receiving apparatus, in which a modulation signal based on a first data sequence is canceled from an added signal of a modulation signal based on a first data sequence and a modulation signal based on a second and subsequent data sequences. This is an embodiment in which the obtained modulated signal based on the second and subsequent data sequences is added to the signal by signal addition 27.

In FIG. 3, FIG. 5, FIG. 6, FIG. 7, and FIG. 8, which show an embodiment of demodulation, the signal received to demodulate the first data sequence is a signal modulated by the first data sequence. This is an addition signal of the modulation signal based on the signal and the second and subsequent data sequences. For this reason, in the demodulation of the first data sequence, the influence of the demodulated signal due to the second and subsequent data sequences at the reception sample point of the first data sequence and the degradation of the error characteristics of the first data sequence become problems.

数式数式 + „+ + + + + + + + + + + + + + + + + + + + + + + + + 信号 + 信号 + 信号 + + + + + 信号 + フェ信号フェ、フェフェフェフェ信号フェ.

FIG. 11 is a waveform example of a transmitting apparatus in which the modulation signal of the second and subsequent data sequences becomes 0 at the sampling points of the first data sequence, and FIG. 12 shows the first data sequence. The inter-symbol distance between the modulation signal due to the modulation signal and the addition signal of the modulation signal due to the second and subsequent data sequences is not uniform, the inter-symbol distance of the first data sequence is increased, and the inter-symbol distance of the second and subsequent data sequences is increased. 7 is an example of a waveform of a transmission device that performs distribution for reducing.

FIG. 13 is a waveform example of a transmitting apparatus in which the waveform of FIG. 12 is multi-valued.

The receiving apparatus according to the present invention comprises: means for performing transmission permission / prohibition of the second and subsequent data sequences in the transmitting apparatus according to the pattern of the first data sequence; Means for storing a signal obtained by remodulating the first data sequence, which can be transmitted by the second and subsequent data sequences, and a method of storing a pattern by which the data obtained by demodulating the first data sequence can be transmitted by the second and subsequent data sequences. At this time, the means for subtracting the stored remodulated signal from the added signal of the received modulated signal of the first data sequence and the modulated signal of the second data sequence, Even if the received sample points of the modulated signals by the series are different,

Demodulation in which the deterioration of the error characteristic caused by the interference caused by the interference is very small. Similarly, in the case of a modulated signal in which the second and subsequent data sequences are transmitted by feather transition, demodulation with very little deterioration in error characteristics can be performed. The receiving apparatus according to the present invention may further comprise: a receiver that modulates the amplitude of a signal obtained by remodulating data obtained by demodulating the first data sequence by using a second signal modulated by the first data sequence received at a sampling point for demodulating the first data sequence; Synchronous detection can be performed by means of controlling the amplitude of the addition signal of the modulation signal based on the data sequence, and error characteristics can be improved as compared with differential detection. In the transmission device of the present invention, the inter-code distance between the modulated signal based on the first data sequence and the sum signal of the modulated signals based on the second and subsequent data sequences is not equal, and the inter-code distance of the first data sequence is increased. Means for reducing the inter-symbol distance of the second and subsequent data sequences to make the inter-symbol distance of the sum signal of the modulation signal of the first data sequence and the modulation signal of the second and subsequent data sequences uniform. As compared with the case, the error characteristic degradation of the first data sequence can be reduced. In the embodiments described above, according to the present invention, when extracting the modulation signal of the second and subsequent data sequences, the modulation signal of the first data sequence is canceled, and thus the modulation signal of the first data sequence is unrelated. Then, a modulated signal of the second and subsequent data series can be generated. Further, as shown in FIG. 13, when a modulated signal based on the second and subsequent data sequences is transmitted in multiple values, the function of detecting the second and subsequent data sequences in the receiving device may be multivalued. As an example of the characteristics of the receiving apparatus according to the present invention, the average power of the modulated signal by the first data sequence is represented by [Equation 29], and the average power of the modulated signal by the second and subsequent data sequences is represented by [Equation 30]. Here, the calculation results of the error characteristics when the power ratio is expressed by [Equation 31] are shown.

[0 0 3 9]

[Equation 2 9 I,

[Equation 30]

Common,

[Equation 3 1] ―

FIG. 14 shows an example of transmitting the transmission signal of FIG. 11 and using a matched filter as a reception filter, and shows an error characteristic when α is set to 0.1. This is the error characteristic when α is set to 0.3.

In this case, in FIG. 11, the following expression is obtained.

In the present invention, as in these characteristic examples, an error characteristic (BER BER) obtained by demodulating the first data sequence is compared with an error characteristic (error characteristic of QPSK) when the second and subsequent data sequences are not transmitted. In addition to minimizing the degradation of 1), it is also possible to demodulate the modulated signal of the second and subsequent data sequences due to the feather transition, which was difficult with the conventional technology (BER 2). For reference, the figure also shows the error characteristics of the 8-phase P S Κ.

[Equation 3 2]

_η , scream

Fig. 16 shows an example in which the transmission signal of Fig. 12 is transmitted and a matched filter is used as the reception filter.The error characteristic when is set to 0.1 is shown in Fig. 17. Is the error characteristic when is set to 0.3.

In this case, in FIG. 12, the following equation is obtained.

FIG. 19 shows an error characteristic in which α is 0.5, as an example of a conventional case where the inter-code distance is equalized.

In the conventional technology, the error characteristics due to the first data sequence are compared with the error characteristics when the second and subsequent data sequences are not transmitted (the error characteristics of QPS S) as shown in Fig. 19

Although deteriorated, in the present invention, the deterioration of the error characteristic (BER 1) obtained by demodulating the first data sequence can be reduced.

[Equation 3 3] δ P _main A-δ

Fig. 18 shows an example in which the transmission signal of Fig. 12 is transmitted and a matched filter is used as a reception filter, where a is set to 0.1 and the receiving device modulates the second and subsequent modulated signals three times. This is an example of repeated addition.

As described above, according to the present invention, it is possible to reduce the deterioration of the error characteristic obtained by demodulating the first data sequence and to improve the error characteristic of the second and subsequent data sequences by repeatedly adding them. it can.

Industrial applicability

The transmitting device and the receiving device using the transmission method according to the present invention can be widely used in the fields of multimedia communication, television broadcasting, telephone, personal computer communication, mobile communication and the like, and the entire broadcasting field.

Claims

4 Claims

1. The first data sequence is transmitted in a signal space diagram, and the second and subsequent data sequences are data obtained by demodulating the first data sequence in a layered transmission method receiver that uses a fuzzy transition. The modulated signal of the first data sequence and the second modulated signal of the second data sequence are subtracted from the sum of the received modulated signal of the first data sequence and the modulated signal of the second data sequence. A function is provided to cancel the modulated signal of the first data sequence from the added signal of the modulated signal of the data sequence, extract the modulated signal of the second and subsequent data sequences, and demodulate the modulated signal of the second and subsequent data sequences. Receiving device.

2. The receiving apparatus according to claim 1, wherein the amplitude of the signal obtained by remodulating the data obtained by demodulating the first data sequence is represented by the first data received at a sampling point for demodulating the first data sequence. A receiving device having a function of controlling the amplitude of a sum signal of a modulated signal of a sequence and a modulated signal of a second data sequence.

3. The transmitting device determines whether the second and subsequent data sequences can be transmitted according to the pattern of the first data sequence, and the second and subsequent data sequences are described in the receiving device described in claim 1 and claim 2. A signal obtained by remodulating the first data sequence that allows transmission of the first data sequence is stored, and when the data obtained by demodulating the first data sequence has a pattern that allows transmission of the second and subsequent data sequences, reception is performed. By subtracting the stored re-modulated signal from the added signal of the modulated signal of the first data sequence and the modulated signal of the second data sequence, the modulated signal of the second and subsequent data sequences is extracted. And a receiver having a function of demodulating a modulated signal based on the second and subsequent data sequences.

4. A period in which only the first data sequence is transmitted by the transmitting device is repeatedly provided, and the receiving device described in claim 1, claim 2, or claim 3 is provided.

The transmission device detects a period during which only the first data sequence is transmitted from the data obtained by demodulating the first data sequence, and determines a period between the modulation signal based on the first data sequence and the modulation signal based on the second data sequence during this period. Detects the amplitude of the addition signal and re-modulates the data obtained by demodulating the first data sequence, or controls the amplitude of the re-modulated signal by storing the data based on the amplitude of the modulation signal based on only the first data sequence. A receiving device with functions.

5. The transmission device for layered transmission that receives using the receiving device described in claim 1, claim 2, claim 3, or claim 4. In addition, the sum of the modulation signal of the first data sequence and the modulation signal of the second and subsequent data sequences is such that the modulation signal becomes 0 in the second and subsequent data sequences at the sampling point of the first data sequence in reception. And a transmission device having a function of generating a modulated signal based on the second and subsequent data sequences.

6. A transmitter for hierarchical transmission that receives using the receiver described in claim 1, claim 2, claim 3, claim 3, or claim 4. Therefore, the inter-code distance of the addition signal of the modulation signal of the first data sequence and the addition signal of the modulation signal of the second and subsequent data sequences is not uniform, and the inter-code distance of the first data sequence is increased. A transmission device having a function of performing distribution to reduce the inter-code distance of a sequence.

7. A period in which only the first data sequence is transmitted by the transmitting device is repeatedly provided, and the claims are described in claim 1, claim 2, claim 3, claim 3, and claim 4. In the receiving device, a period during which only the first data sequence is transmitted is detected from the data obtained by demodulating the first data sequence by the transmitting device, and a modulation signal based on the first data sequence and a second data sequence during this period are detected. By detecting the amplitude of the added signal of the modulated signal based on the first data sequence and detecting the amplitude of the modulated signal based on only the first data sequence, and using the information signal of the detected amplitude as a threshold, the modulated signal based on the second and subsequent data sequences Demodulate

A receiving device with functions.

8. The transmission device according to claim 5, wherein the error correction signal is added to the first data sequence, and wherein the error correction signal is added to the first data sequence. In the receiving device according to claim 3, the re-modulated signal based on the error-corrected data of the data obtained by demodulating the first data sequence, Alternatively, a receiving apparatus having a function of extracting a modulated signal based on the second and subsequent data sequences from the stored remodulated signal.

9. Claim 1, Claim 2, Claim 3, Claim 3, Claim 4, Claim 7, Claim 8, At the receiving device, a modulated signal based on the second and subsequent data sequences in which the modulated signal based on the first data sequence has been canceled is obtained from an addition signal of the modulated signal based on the first data sequence and the modulated signal based on the second and subsequent data sequences. A receiving device having a function of repeatedly adding.

10. The receiving apparatus according to claim 1 to claim 8 and the transmitting apparatus according to claim 5, wherein a division multiplexing such as TDM, FDM, CDM, OFDM, etc. is used. A receiving device having a function, and a transmitting device.