TW443059B - Orthogonal frequency division multiplex transmission method and transmitting apparatus and receiving apparatus therefor - Google Patents

Abstract

Using (12) to perform Fourier transform, a received OFDM signal is converted from time domain to frequency domain, thereby obtaining the vector series of each carrier wave in the frequency domain. (13) derives the required scattered and terminating pilot signals from the vector series, and (15) modulates a plurality of vector divisions to determine characteristics of the transmission path of the scattered/terminating pilot signals. (16) compensates for the characteristics of the transmission path, and determines the characteristics of the transmission path of a transmission carrier for segment information used in synchronization pulse detection. In addition, (17) delays the vector series obtained from Fourier transform by one symbol. In the case of synchronization pulse detection segment, the compensated output is selected, and in the case of differential pulse detection segment, (18) selects the delayed output to thereby select the output divisions of the aforesaid vector series. (20) demodulates the synchronization detection pulse or the differential detection pulse to obtain a plurality of information. In view of this, high quality demodulation and demodulation suitable for moving reception can be realized.

Description

Printed by the Central Bureau of Standards, Ministry of Economic Affairs, Consumer Cooperatives 443 05 9 A7 ______ & 7 V. Description of the Invention (1) The present invention relates to the orthogonal frequency of a channel that transmits signals suitable for fixed and mobile reception. Split multiplexing ... rth〇ganal frequency division multiplex trensmission) method. At the same time, it is about a transmitting device that forms an OFDM signal according to the orthogonal frequency division multiplex transmission method and transmits it, and a receiving device that receives the OFDM signal that is transmitted according to the orthogonal frequency division multiplex transmission method and demodulates it. 〇 · We are currently reviewing the use of orthogonal frequency division multiplexing (hereinafter referred to as OFDM) technology as a digital broadcast transmission method for ground wave TV broadcasting. This OFDM transmission method is one of multiple carrier frequency modulation methods. Modulation is performed on most carriers in orthogonal frequency relationships according to each symbol * to transmit digital data. This method divides the digital data into a plurality of carriers and transmits them as described above. Therefore, in order to modulate the symbol period length of the divided digital information of one carrier, it is difficult to receive delayed waves such as multipath. The nature of the impact. Digital broadcasting methods of TV signals using traditional OFDM transmission technology are, for example, the DVB-T standard adopted in Europe, namely, ETSI 300 744 (ETSI: European Telecommunications Standards Instiute). The traditional OFDM transmission method is, for example, 2K mode (2K means that the number of samples of the high-speed Fourier transform when forming an OFDM signal is 2048), which uses a carrier of the Π05 carrier frequency in the full transmission band, of which the carrier of the 142 carrier frequency is used for dispersion Pilot (Scattered Pilot) signal, the carrier with 45 carriers is used for continuous pilot signals, the carrier with 17 carriers is used for control information (TPS), and the carrier with 1512 carriers is used for information transmission signals. Wood paper scale is applicable to China National Standards (CNS) A4 (210 X 297 Gongchu) mu '— ^ n nn Jm ^ m · luff ^^ 1 ^' (Please read the notes on the back before filling in this page 0- 1 order m_ 4 443059 A7 B7 V. Description of the invention (2) However, among the continuous pilots of the carrier of '45 carrier frequency, the continuous pilot signals of the carrier of the η carrier frequency are repeatedly configured with the scattered pilots. The scattered pilots The frequency configuration of a signal in one symbol is configured to have a 12-carrier frequency period. The frequency configuration is shifted from the carrier frequency configuration by each symbol, and the time configuration is 4 symbol periods. Specifically, if the carrier frequency is from one end, The number K is sequentially from 0 to 1704, and the number η of the symbol in the code frame is 0 to 67. Then, the scattered pilot signal is configured on the carrier of the carrier frequency number K shown in formula (1). At (1 In the formula, m〇d represents the remainder operation, and P is an integer from 0 to 141. k = 3 (n mod 4) + 12p (1) The continuous pilot signal is arranged at the carrier frequency number k = (0,48, 54,87,141,156,192,201,255,279,282,333,432,450,483,525,531,618,636,71 4,759,765,780,804,873,888,918,939,942,969,984 ,: (050, 11〇1 , 1107, 1110, 1137, 1140, 1146, 1206, 1269, 1323, 1377, 1491, 1683, 1704). These decentralized and continuous pilot signals can be based on the PN corresponding to the carrier frequency number k that is configured separately. The (virtual random number) series Wk is obtained by modulating the carrier by the complex vector Ck, n shown in Equation (2). In Equation (2), Re (Ck, n) represents the corresponding carrier frequency number k and the symbol number η. The real number part of the complex vector Ck, n of the carrier, and Im (CM) represents the imaginary number part.

Re {〇M} = fx2 (| -wk) (2)

Im {ck, n} = ° Controlled as TPS (Transmission Parameter Signaling) This paper size applies the Chinese National Standard (CNS) A4 specification (2 丨 OX 297 mm) ΙΊ .: ---- 装 装 II · · '.- · ~ (t first read the note on the back ^ h and then ^ write this page * 3.Mi order printed by the Central Laboratories of the Ministry of Economic Affairs and printed by the Shellfish Consumer Cooperative 4 4 3 0 5 9 A7 B7 V. Invention Explanation (data ^ number is the carrier frequency number 688,790,901,1073,1219,1262,1286,1469,1594,1687), each symbol is transmitted. One bit of control data. Assume the symbol number !! When the transmitted control information bit is Sn, the control data signal can be obtained by modulating the carrier by the complex vector Ck n shown in Equation (3). That is, the carrier transmitting the control information signal is a differential 2 value between symbols. PSK (phaseshiftkeying) modulation 〇〇 ^ .j Re {cM} = Re {ck, n-1}. (3Re {ck, n} = -Re {ckn4} Im {ck, n} = ° but in the code box The preceding symbol (symbol number n = 0), the carrier transmitting control information is modulated by the complex vector Ck, n shown in formula (4) according to the above-mentioned PN series Wk "

Re {ck, o} = 2 (| -wkImH, 〇) = 〇 (4) The carrier of 1512 carrier frequency printed by information transmission signals other than the above is printed by the Central Standards Bureau of the Ministry of Standards and Technology, which is based on digital Data, plus QPSK, 16QAM or 64QAM modulation. Any-modulation method is absolute phase modulation. Figure 10 shows an example of a conventional receiving device that receives the OFDM signal thus formed to demodulate digital information. This paper uses China's Zhou Jia Standard (CNs) A4 specification (210X297 mm) 6-443059 V. Description of the invention (4) In Figure 10, 'The received OFDM signal is converted by its tuner 101 and its frequency', and then by Fourier The conversion circuit 102 performs time-frequency conversion to become a vector of each carrier in the frequency domain. This vector is supplied to the scattered pilot extraction circuit 103 and the continuous pilot extraction circuit 109. The scattered pilot extraction circuit 103 is obtained from the Fourier transform circuit 丨 〇2 The amount of output is used to extract the scattered pilot signals. When the vector generation circuit 104 is generated, the modulation complex vector Ck, n of the scattered scattered pilot signals extracted by the scattered pilot extraction circuit 103 should be generated. The complex vector 'generated by the generating circuit 104 is divided by the scattered pilot signal extracted by the scattered pilot extraction circuit 103, and the transmission path characteristics of the scattered pilot signal are estimated from the result of the division. The tween circuit 106 pairs the Xu method circuit 1 〇5 The transmission path characteristics of the scattered pilot signal obtained are tweened, and the transmission path characteristics of all carriers are estimated. The division circuit 107 is based on the corresponding carrier tween circuit. The output vector columns are subjected to synchronous detection. The demodulation circuit 108 demodulates the synchronous detection signal rotated by the division circuit 107 according to the modulation method (QPSK '16QAM, 64QAM, etc.) used when forming the information transmission signal. 'Get the transmitted digital information. The continuous pilot extraction circuit 109 extracts the continuous pilot signal from the vector column output by the Fourier transform circuit 102. The vector generation circuit 110 generates the corresponding continuous pilot extracted by the continuous pilot extraction circuit 109. The modulated complex vector 匚 ^ of the signal. The division circuit 1U divides the complex vector 'generated by the vector generating circuit 110 by the continuous pilot circuit 109. The continuous pilot signal is used to measure the transmission path characteristics of the continuous pilot signal. The inverse Fourier transform circuit U2 adds frequency to the transmission path characteristics of the continuous pilot signal inferred by the division circuit 111. This paper applies the Chinese National Standard (CNS) 8-4. Secret (210X297 mm) A7 B7 443059 V. Description of the invention (5) A time conversion is used to obtain the impulse response characteristics of the transmission path. However, the traditional OFDM transmission method modulates the carrier for transmitting digital information using QPSK , 16QAM, 64QAM, etc., its demodulation is based on smoothing the transmission path characteristics inferred from scattered pilots in time. The transmission path characteristics are obtained by smoothing, as a prerequisite. Fading (Fading) and other mobile receivers that cause rapid changes in the characteristics of the transmission path sometimes fail to obtain good transmission quality. Moreover, the traditional OFDM transmission method has a modulation method for each carrier in the entire frequency band. Therefore, even if the W5 digital information is to be received while moving, the modulation of the carrier transmitting the digital information is suitable for mobile. For example, the received QPSK modulation will still reduce the overall transmission capacity and reduce the efficiency. At the same time, because the continuous pilot signal is any of the carriers configured at a certain carrier frequency interval of eight, it will generate a valid symbol period table (the carrier's Reciprocal of the minimum frequency interval). Therefore, the object of the present invention is to provide a solution that can solve the above-mentioned problem, 'can maintain the overall transmission capacity, and introduce a modulation method suitable for mobile reception in the modulation part of the carrier transmitting digital data, and to avoid continuous pilot signals. The impulse response of the inferred transmission path has a return, and an OFDM transmission method configured with a continuous pilot signal and a transmitting device and a receiving device suitable for this method. To solve the above problems, the architecture of the OFDM transmission method of the present invention is as follows. This paper prostitutes for wealth g | Zui County (⑽) Ege (2iqx297 Gonglu)

(谙 Please read the precautions on the back before #write this page VX -install --- * --- bu — order printed by the Ministry of Economic Affairs, China Standards Bureau Off-line Consumer Cooperatives 443059 A7 B7 V. Description of Invention (6) Ministry of Economic Affairs Printed by the Central Bureau of Work and Consumer Cooperatives, in each symbol period, modulation is performed on the majority of carriers with mutually orthogonal frequency relationships to transmit digital information in an OFDM transmission mode. In most of the above carriers, a certain amount of The number of carriers as a unit is allocated to more than one segment, and more than one carrier is allocated to the band terminal pilot signal ', and each of the above one or more segments is used as a synchronous detection or Either of the methods used for differential detection. In the above-mentioned synchronous detection + segmentation, the carrier with periodic dispersion of symbol time and frequency is allocated with a distributed pilot that can modulate the carrier with a specific phase and amplitude 彳 § No. 'is a carrier of the same frequency for each symbol, and the configuration can be in accordance with additional information. Borrow M (M is a natural number above 2) phase shift keying (Phase phase PSK) or differential M phase shift phase key Control, modulate the load For the additional information transmission signal, for carriers other than the above, the carrier information transmission signal is modulated according to the digital information. In the differential detection segment, the carrier of the same frequency for each symbol can be configured according to the additional Information, by M phase shift keying or differential M phase shift keying in the direction of the symbol, the additional information transmission signal of the carrier is modulated, and the above-mentioned scattered pilots capable of satisfying the phase-synchronized synchronous detection are used. The frequency of the signal signal is configured with a carrier of a periodic frequency. The terminal pilot signal of the carrier can be adjusted with a specific phase and amplitude. For carriers other than the above, the information transmission of the carrier can be adjusted according to the digital information. The terminal pilot signal of the above-mentioned frequency band is arranged at a frequency that can meet the periodicity of the frequency distribution of the above-mentioned decentralized pilots of the synchronous detection segment, and is a carrier at the end of the transmission band. 丨 It is adjusted with a specific phase and amplitude. Change the paper New Zealand to apply China Zhoujia Standard (CNS) A4 specification (2ι〇χ297 公 幻 1¾)

Page I «« 9 443059 Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs Α7 Β7 5. Description of the invention (7) Carrier wave. ⑵In each symbol period, modulation is performed on the majority of carriers in an orthogonal frequency relationship to transmit digital information in an OFDM transmission mode. For most of the above carriers, a certain number of carriers are used as a unit to be assigned to more than one segment, more than one carrier is assigned to a band terminal pilot signal, and each of the above one or more segments is assigned , Respectively, as a method for synchronous detection or differential detection. In the above-mentioned segmentation for synchronous detection, the time and frequency of the symbol are periodically dispersed and the carrier is dispersed. The scattered pilot signal of the carrier can be modulated with a specific phase and amplitude. The carrier of the same frequency for each symbol can be configured. Modulate the continuous pilot signal of the carrier with a specific phase and amplitude. For carriers with the same frequency for each symbol, the configuration can be based on additional information, by M phase shift keying or by differential M phase shift of the symbol direction. Keying modulates the additional information transmission signal of the carrier. For carriers other than the above, it is configured to modulate the wave transmission signal according to the digital information. In the above-mentioned differential detection segment, for each symbol of a carrier having the same frequency, a continuous pilot signal of the carrier can be modulated with a specific phase and amplitude, and each symbol is a carrier of the same frequency. The configuration can modulate the additional data transmission signal of the carrier by M phase shift phase keying by additional information, or by differential μ phase shift phase keying of the symbol direction. Disperse the frequency allocation of pilot signals. Carriers with periodic frequencies can be configured to modulate terminal pilot signals of the carrier with a specific phase and frequency. For carriers other than the above, they can be configured to modulate the carrier according to the digital information. Information transmission signal. This paper size uses China: National Standard (CNS) M specification (2ΐ〇 × 297 公 楚)

4 43 0 5 9 A7 _ B7 printed by the Shell Standard Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (8) The pilot signals of the above-mentioned frequency band are arranged on the distributed pilots that can satisfy the above-mentioned synchronous detection segment. The frequency of the signal is configured with a periodic frequency 'and is the carrier of the transmission band terminal, and the carrier is modulated by a specific phase and amplitude. (3) In the structure of ⑴ or ⑵, the frequency configuration of the additional information transmission signal in the section for synchronous detection and the frequency configuration of the additional information transmission signal in the section for differential detection are part of Common configuration. ⑷In the structure of ⑴ or ⑵, the above-mentioned section for synchronous detection uses the frequency configuration of the additional information transmission signal as a part of the frequency configuration of the above-mentioned additional information transmission signal of the differential detection section. ⑸In the structure of ⑵, a part of the frequency configuration of the continuous pilot signal in the segment for synchronous detection and the frequency configuration of the continuous pilot signal in the segment for differential detection are part of a common configuration. (2) In the structure of (2), the synchronous detection segment refers to the frequency configuration of the continuous pilot signal as a part of the frequency configuration of the continuous pilot signal of the differential detection segment. ⑺In any of the frameworks ⑴ ~ ⑹, the above additional information contains control information. ⑻In the framework of ⑺, the above control information is transmitted by differential 2-phase shift keying (DBPSK) in the direction of the symbol. ⑼In the structure of ⑺, a portion of the frequency allocation of the control information in the above-mentioned synchronous detection segment and the frequency allocation of the above-mentioned control information in the above-mentioned differential detection segment are part of a common arrangement.

443059 A7 ______B7 V. Description of the invention (9) ⑽ In the structure of ⑺, the above-mentioned segmentation for synchronous detection uses the frequency configuration of the above-mentioned control information as the frequency configuration of the above-mentioned control information of the above-mentioned differential detection segment. portion. ⑼In any one of ⑴ ~ ⑽, the number of segmented carriers for synchronous detection is a multiple of N (N is a natural number of 2 or more), and the scattered pilot signals are arranged at N carrier frequency intervals. And according to the approximate number of shifts of each symbol) carriers. _ ⑽In any one of ⑴ ~ 架构, the segmentation of the above-mentioned synchronous detection and differential detection is to arrange each of the additional information transmission signals in an inverse Fourier transform that enables the frequency allocation of the additional information transmission signals. For Carriers with Pulsed Frequencies "⑵In the 'Architecture' section of the above-mentioned synchronous detection and differential detection, the above-mentioned continuous pilot signals are arranged in a frequency configuration that enables the continuous pilot signals The inverse Fourier transform pair is a carrier of pulsed frequencies. (14) In the structure of ⑵, the above-mentioned synchronous detection and differential detection segments are used to transmit each of the additional information transmission signals and continuous pilot signals described above. The inverse Fourier transform of the frequency components synthesized by both sides of the frequency signal becomes a carrier wave with a pulsed frequency. ⑽ In any one of the structures ⑴ to ⑽, the above-mentioned segment for synchronous detection and the segment for differential detection 'use the same number of carrier frequencies. (1) In any of the structures (2) to (2), the terminal pilot signal is placed only on the carrier at the frequency band end of the differential detection segment. The structure of ⑽⑴ is formed by the band terminal pilot using 13 segments and one carrier frequency carrier. A segment of 108 carrier frequencies. This paper grade national standard (CNS) M specification (21 × 297 mm) — 443059 A7 B7 5. Description of the invention (10) Central Ministry of Economic Affairs The standard bureau Shellfish Consumer Cooperative Co., Ltd. printed a carrier using H05 carrier frequencies for each frequency band. The above-mentioned segmentation for synchronous detection uses a scattered pilot signal of a carrier having 9 carrier frequencies in one symbol, and an additional information transmission signal using three carrier frequency carriers, and an information transmission signal using a carrier carrier of 96 carrier frequencies. Composition: The above-mentioned segmentation for differential detection is based on the use of an additional information signal of an 11 carrier frequency carrier 'terminal pilot signal using one carrier frequency carrier and an information transmission signal using a carrier frequency of 96 carrier frequencies. Make up. The structure of ⑽⑵ is formed by the pilot signals of the frequency band terminals using 13 segments and a carrier frequency carrier, one sub-unit is composed of 108 carrier frequency carriers, and the entire frequency band uses 1405 carrier frequency carriers. The above-mentioned segmentation for synchronous detection consists of 'using scattered pilot signals of carriers with 9 carrier frequencies per symbol, and additional information transmission signals using carriers of one carrier frequency' using continuous pilot signals of carriers of two carrier frequencies, and It is composed of information transmission signals using 96 carrier frequency carriers. The above-mentioned segmentation for differential detection uses additional information signals of carriers of 5 carrier frequencies, continuous pilot signals of carriers of 6 carrier frequencies, terminal pilot signals of carriers of one carrier frequency, and 96 Carrier frequency. The information transmission signal of the carrier. The structure of the transmitting device of the present invention is as follows. It is equipped with a device that can generate OFDM signals by using the orthogonal frequency division multiplexing transmission method of any of the structures of ⑴ ~ ⑴. A transmission device that generates an OFDM signal by using the orthogonal frequency division multiplex transmission method includes: ι ·

I Ή ·, fv% CNS for binding and binding of paper sheets (210X297 ^) 13 Printed by the Central Consumers Bureau of the Ministry of Economic Affairs and Consumer Cooperatives 443〇59 a? ___ B7 5. Description of the invention (11) In a certain number of carriers as a unit, it is allocated to more than one segment, more than one carrier is allocated to the band terminal pilot signal, and the above one or more segments are allocated to synchronous detection for each segment. Or any one of the distribution components for differential detection, and can generate the signal production of the scattered pilot signal, the additional information transmission signal, the information transmission signal, the terminal pilot signal, and the frequency band terminal pilot signal, respectively. · Raw components. The allocating means arranges the band terminal pilot signal at a periodic frequency that satisfies the frequency configuration of the decentralized pilot signal of the segment for synchronous detection, and a carrier at the transmission band end. Segmentation means that the above-mentioned scattered pilot signals are arranged on carriers whose symbol time and frequency are periodically dispersed, the above-mentioned additional information transmission signals are arranged on carriers where each symbol has the same frequency, and the above-mentioned information transmission signals are arranged outside of the above For the carrier, for the differential detection segment, the additional information transmission ig is configured, and each symbol is a carrier of the same frequency, and the terminal pilot signal is configured to satisfy phase-connected synchronous detection. Carriers of periodic frequency configured with the frequency of the segmented scattered pilot signals described above. A transmission device that generates OFDM signals by means of orthogonal frequency division multiplex transmission is provided with: Among the above-mentioned majority carriers, a certain number of carriers are used as a unit, which is allocated to more than one segment, and more than one Carriers are allocated to the band terminal pilot signals' and one or more of the above-mentioned segments are allocated to each of the synchronous detection or differential detection components in each segment, and,

14 Α7 Β.7 Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs

*

443 〇 5 9 V. Description of the invention (2)-and the above-mentioned scattered pilots of the other kings, the above-mentioned information transmission signals, the above: the above-mentioned additional information transmission signal pilot signals, and the above-mentioned _ = f number, the above At the end of the frequency band, < 4ί ν The signal generation component of the pilot signal. The above-mentioned knife fitting distributes the pilot signal of the above-mentioned frequency band terminal to meet the above-mentioned frequency division p J for synchronous detection, and has a periodic frequency. ^ The step-by-step frequency detection of the scattered pilot signal is carried out. The same as above means that the above-mentioned scattered pilot signal is arranged at the symbol time gate, and each symbol is a carrier of the same frequency. The = continuous pilot signal is arranged at the carrier, and the additional information transmission signal is arranged at the carrier. The mother symbol All are the same number. + Carriers will place the above information transmission on carriers other than the above. Regarding the above-mentioned differential detection segmentation, the above-mentioned continuous pilot signals are arranged at the same frequency for each symbol. Carrier 'configures the above-mentioned additional information transmission signal, each symbol is a carrier of the same frequency, and the terminal pilot signal is configured to have the above-mentioned decentralized pilot signal that can satisfy the m-segment synchronous detection segment. The frequency configuration is the periodic frequency cut. The structure of the receiving device of the present invention is as follows.

The object is provided with a device that can receive and demodulate the 0FDM signal formed by the 0FDM transmission method described in any one of ⑴ ~ ⑽. You can receive the OFDM signal formed by the 0FDM transmission method described in any one of ⑴ ~ ⑽, and demodulate the receiving signal. It has «Fourier Transform to transform the received 0FDM signal 'from The signal in the time domain is transformed into the signal in the frequency domain, thereby obtaining the above-mentioned paper CNS applicable to the paper. A4 secret (210X297 mm) ~~ ----- 1 -13 «A7 B7 443059 — V. Invention Explanation (I3) A Fourier transform component of a vector sequence of carrier phases and amplitudes. From the vector sequence obtained by this component, a first extraction component β of a vector group of carriers of the terminal pilot signal and the band terminal pilot signal with respect to the scattered pilot signal is extracted to modulate the scattered pilot signal. , The above-mentioned specific phase and wave block of the above-mentioned terminal pilot signal and the above-mentioned terminal pilot signal of the frequency band are divided by the first division component of the vector group extracted by this component; And a tweening filter component; a delay component that delays the vector sequence obtained from the Fourier transform component by one symbol period; when processing the signal of the synchronous detection segment, the output of the filtering component is selected and the differential detection segment is processed When the signal is a signal, a selection member that outputs the output of the delay member is selected; and a second division member that outputs the detection vector sequence by dividing the vector sequence output by the Fourier transform member by the output signal of the selection member. ㈣ A receiving device that can receive and demodulate OFDM signals formed by the 0 FDM wheel transmission method described in the item, is provided with a method that uses Fourier transform to transform the received 0FDM signal from the signal in the time domain. Transform into a signal in the frequency domain to obtain a Fourier transform component representing the vector sequence of each carrier ’s phase and amplitude; from the vector sequence obtained by this component, extract the segment relative to the synchronous detection and the differential The second extraction component of the vector group of the carrier of the above-mentioned continuous pilot signal for detection; please read the note on the back next to the printed standard printed by the Ministry of Economic Affairs, Central Standards Bureau, Consumer Cooperatives, and China National Standards (CNS) ) A ^ " (21Gx297 mm)

16 443〇59 A7 ^ _ B7 _ ___ V. Description of the invention (14) · Modulate the above-mentioned specific phase and amplitude of the continuous pilot signal, and divide the third division component of the vector group extracted by this component; and, By the inverse Fourier transform, the output of this component is transformed from the frequency domain to the time domain, thereby obtaining the inverse Fourier transform component of the impulse response characteristic of the transmission path. The detailed description of the OFDM transmission method of the present invention and the transmission device and receiving device suitable for the OFDM transmission method are as follows. First Embodiment The OFDM transmission method of this embodiment is formed by a band terminal pilot using 13 segments and a carrier of a carrier frequency, and one segment is composed of a carrier of 108 carriers. Each segment is constructed by either a segment for synchronous detection or a segment for differential detection. The entire frequency band uses a carrier frequency of 1405 carrier frequency. Fig. 1 shows the configuration of the pilot signal of the band terminal by segmentation (13 segments in total) for synchronous detection or differential detection. The horizontal axis represents the frequency axis (carrier frequency configuration) in a mode, and the vertical axis represents the time axis (symbol direction) in a mode. The carrier frequency number K in each segment is an integer from 0 to 107. One segment is composed of a carrier with a carrier frequency of 108. The segmentation for synchronous detection is based on the use of scattered pilot signals of carriers with 9 carrier frequencies per symbol, additional information transmission signals using carriers with 3 carrier frequencies, and information transmission signals using carriers with 96 carrier frequencies. , Constituted by. Segmentation for differential detection consists of additional information transmission signals using 11 carrier frequency carriers, terminal pilot signals using one carrier frequency carrier, and information transmission signals using 96 carrier frequency carriers. Because the segmentation for synchronous detection and the segmentation for differential detection use the same paper size, it is applicable to China National Standard (CNS) Ya 4 4 (2 丨 0X297) 嫠 17 443059 A7 B7 V. Description of the invention (15) 1.08 Carrier frequency, so the required transmission band will not be changed due to combined segmentation. Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs. It is assumed that the carrier frequency number κ of the entire frequency band is an integer from 0 to 1404. The segmentation number i is an integer from 0 to 12 'the carrier frequency number k in each segment is an integer from 0 to 107, and can satisfy k = i ♦ i〇8 + k,》 Scattered pilots set in the segments for synchronous detection The signal is arranged in each segment according to the formula (5); the carrier of the carrier frequency number y. In formula (5), mod represents a residual operation, and ^ of the remaining number is an integer of 0 or more, and p is an integer of 0 or more and 8 or less. k, = 3 (n mod + 4) + 12p (5) The additional information transmission signals provided in the synchronization segment and the differential segment are the carrier frequency numbers k respectively arranged in the segments shown in Table 1. , The carrier. Table 1 shows that the additional information transmission signal of the segment for synchronous detection is included in the additional information transmission signal of the segment for differential detection. Due to the above-mentioned structure, even in the state where the segments for synchronous detection and the segments for differential detection are mixed, the carrier of the additional information transfer signal defined as the segment for synchronous detection must be provided with an additional information transmission signal, The receiving end can easily identify whether it is an additional information transmission signal or another transmission k number. Furthermore, carriers can also be appropriately allocated according to the additional information transmitted, so that it does not become a partial aggregation configuration.

Please read the precautions before / fill in [Write .. This page is bound 443059 A7 B7 V. Description of the invention (16) Table 1 Additional information Frequency allocation of the Fu wheel signal Segment number i Carrier frequency number k * No. 0 10 28 50 3 ΐυ 28 45 59 77 13 50 < 70 R3 S7 No. 1 53 83 25…. 3 15 40 53 5 8 S3 25 63 73 R〇93 No. 2 6L 100 71 .29 41 61 84 93 100 4 7 Π 51 71 No, 3 11 ιοί 55 11 28 45 81 9 \ 1〇1 36 48 55 59 86 No. 4 20 40 44 20 23 4ϋ 63 85 105 10 28 44 Λ7 54 No, 5 JT Γόο 25 —-. 3 ° ^ SI 92 100 103 7 25 47 60 87 No. 6 35 79 49 Λ1 Is, 72 79 85 89 49 61 96 99 104 No. 7 76 97 65 J, 57 76 92 97 --U -47 65 72 No. 8 ^ 4 89 74,: li »9 93 98 102 16 30 37 74 83 No. 9 40 & 9 5 ^ [i 95 100 105 5 10 21 44 61 No. 10 S 64 S5 Ί1 ^ 4 »52 64 74 — ^^ — 85 98 102 No. Π 7 89 70 Λ 30 42 89 104 --54 7〇 'L〇I No. 12 9S 1ΌΙ 37 G 55 81 98 101 ——- il, ., 51 6 ft 105 Printed by Shelley Consumer Cooperative, Central Standards Bureau, Ministry of Economy X. Terminal pilots located in segments for differential detection The signal is a carrier whose carrier frequency number k 'is 0 in each segment. The configuration of the terminal frequency signal is at a periodic position that maintains the frequency configuration of the scattered pilot signals of the adjacent synchronous detection segments. Each terminal pilot signal is supplemented with the scattered pilot signal. FIG. 2 shows an example of the arrangement of segmented pilot signals for synchronous detection and the arrangement of segmented pilot signals for differential detection. The horizontal axis represents the frequency draw (carrier frequency configuration) in a modulo manner. The vertical axis represents the time in a modal manner. The Zhang scale is applicable to the Chinese Analyst Standard (CNS) A4 specification 443〇59 A7 B7. 5. Description of the invention (π) (Symbol direction ) The carrier frequency number k in each segment of β is an integer from 0 to 107, and the two segments are composed of carriers with a carrier frequency of 108. The additional information transmission signal is allocated to a carrier different from the scattered pilot signal. These scattered pilot signals and terminal pilot signals are based on the correspondingly assigned carrier frequency number k (determined by the segment number i and the carrier frequency number in each segment hindering k), the PN (virtual random number) The series wk (Wk = 0, l) is obtained by modulating the carrier with the complex number ck, n shown in formula (6). In formula (6), ‘Re {ck, n} represents the real part of the complex vector cfc, n of the carrier corresponding to the carrier frequency number k and the symbol number η, and Im {ck,„} represents the imaginary part

Re {ck (n} = | x2 [| -Wk Im {ck, n} = 〇 (6 Additional information printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs on the segments for synchronous detection and segments for differential detection The transmission signal is used to transmit additional information that is different from the information transmission signal transmitted using the 96 carrier frequency carrier. For example, it may be control information that specifies the transmission mode (number of segments, frequency modulation method, etc.) Or the information used by the broadcasting station (such as the control information used by Shen Ji Station, the low-latency voice information used in the live broadcast, the signal for broadcasting station identification, etc.). One bit can be transmitted for each symbol Additional information can also be sent by multiple people. Paper size is applicable to Chinese National Standard (CNS) Α4 specification (2) 0 × 297 mm. C # First read the notes on the back before filling out this page 4

-20 443〇59 A7 B7 V. Explanation of the invention (is) Additional information on bits. At the same time, it is also possible to transmit only control information of a prescribed transmission mode. If it is assumed that the control information bit transmitted with the symbol of the symbol number η is SN ′, the control information signal can be obtained by modulating the carrier wave using the complex vector cfc, n shown in Equation (7). That is, at this time, the carrier for transmitting the control information signal 'is subjected to differential 2-valued PSK (Phase Shift Keying) modulation between symbols. s, lm {ck) n} = 0 ^ {0 ^ π} = ^ β {〇Μ.ι} Im {ck, n} = 〇 (7) Please note A for the binding of the Ministry of Economic Affairs Central Bureau of Standards Printed by Beige Consumer Cooperative, but before the code frame (symbol number n = 0), the carrier for transmitting control information is modulated by the complex vector ck, n shown in formula (8) according to the above-mentioned PN series wk .

Re {cM} = | x2 (| ~ -w, 1111 (0 ^) = 0 (8) 21 This paper size applies to China: National Standard (CNS) A4 size (210X297 mm) A7 B7 Central Bureau of Standards, Ministry of Economic Affairs Printed by Zhengong Consumer Cooperative Co., Ltd. 443059 5. Invention Description (19) Furthermore, when transmitting 2-bit control information for each symbol, you can, for example, use differential 4-phase PSK modulation between symbols, or transmit control information. Most carriers are divided into two groups, and one bit is transmitted for each symbol. The information transmission signal set in the synchronous detection segment is a distributed pilot signal arranged in the above-mentioned synchronous detection segment, and an additional information transmission signal is added. For other carriers, absolute phase modulation is applied according to digital information. This absolute phase modulation is used, such as QPSK, 16QAM., 64QAM modulation, etc. Segmented information transmission signals for synchronous detection are demodulated by the following processing. First of all, 'borrow the modulated pilot signal' to the complex vector of the terminal pilot signal and the band terminal pilot signal, reverse-modulate the scattered pilot, or the necessary terminal pilot signal and the band terminal pilot signal. Messenger The characteristics of the transmission path of the terminal pilot signal in the frequency band area are supplemented in the frequency direction and the symbol direction by a filter to estimate the transmission path characteristics of the information transmission signal. The transmission path characteristics thus obtained are divided by the information transmission signal. This' can demodulate the information transmission signal from the segment for synchronous detection β. The information wheel signal provided in the segment for differential detection is the terminal pilot signal and additional information transmission signal arranged in the segment for differential detection. For other carriers, differential modulation is applied between adjacent symbols of the same carrier frequency number based on digital information. This differential modulation is used, for example, DBPSK, DQPSK, DAPSK, etc. Segmented information for differential detection The transmission signal is demodulated by the information transmission signal of the same carrier frequency number of the previous symbol. It is demodulated. Because the OFDM transmission method of this embodiment is as described above, it can be used in the reception device for ten bands of synchronous detection. The paper size is applied to the Chinese standard (CNS > A4 size (210X297 mm)) by its filter effect.

Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs 4 ^ S〇59 A7 ___ B7 V. Description of the invention (20) High-quality reception, using differential demodulation between symbols during segmentation for differential detection, suitable for Receiving of mobile communications with rapidly changing transmission path characteristics. At the same time, any combination of segments for synchronous detection and segments for differential detection can be arbitrarily combined, thereby realizing a very flexible service form without changing the transmission frequency band. (Second Embodiment) The OFDM transmission method of this embodiment is composed of terminal pilots using 13 segments and a carrier frequency carrier, and one segment is composed of 108 carrier frequency carriers. Each segment is composed of either a segment for synchronous detection or a segment # for differential detection. The entire frequency band uses 1405 carriers. Segmentation for synchronous detection uses scattered pilot signals of carriers with 9 carrier frequencies per symbol, continuous pilot signals with carriers with two carrier frequencies, and additional information transmission signals with carriers with one carrier frequency (this This embodiment is hereinafter referred to as a control information signal), and an information transmission signal using a carrier of 96 carrier frequencies. Segmentation for differential detection consists of 'continuous pilot signals using six carrier frequencies, control information signals using five carrier frequencies, carrier terminal pilot signals using one carrier frequency, and 96 The information transmission signal of the carrier frequency of the carrier frequency. It is assumed here that the carrier frequency number K of the entire frequency band is an integer from 0 to 1404, the segment number 1 is an integer from 0 to 12, and the carrier frequency number within each segment | ^ is an integer from 0 to 107. k = i · 108 + k '. The scattered pilot signals provided in the segments for synchronous detection are arranged in each segment in the carrier frequency number and carrier in the segment according to the formula (5). In the formula (5), m〇d is the paper size applicable to China National Standard (CNS > A4 size (210X297mm)! · —1:) | packing (please read the note on the back, fill in and write the book first) IVL- -Order_ 23 443059 Printed by A7 B7, Shellfish Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (a) Residual operation, P is an integer from 0 to 8. k * = 3 (n mod4) + 12p (5) The continuous pilot signals provided in the sections for synchronous detection and differential detection are the carriers of the carrier frequency number k in each section shown in Table 2. Table 2 shows the sections for synchronous detection The continuous pilot signal is included in the segmented continuous pilot signal for differential detection. Table 2 Frequency allocation of the continuous pilot signal Segment number i Carrier frequency number k 'Synchronous differential wave differential pulse No. 〇10 28 3 10 28 45 59 77 No, 1 53 S3 3 15 40 53 58 83 No. 2 61 100 29 41 61 34 93 100 No. 3 11 101 11 2S 45 81 91 101 No. 4 20 40 20 23 40 63 85 105 No. 5 74 100 30 74 31 92 100 103 No. 6 35 79 3 35 72 79 85 89 No. 7 76 97 5 IS 57 76 92 97 No. 8 4 89 4 13 89 93 98 102 No. 9 40 S9 40 72 89 95 100 105 No. 10 8 64 8 36 48 52 64 74 No. 11 7 89 7 25 30 42 89 104 No, 12 9 »101 10 30 55 81 98 101 With the above-mentioned structure, the segmentation and difference are used for synchronous detection. In the case where there is a mixture of segments for dynamic detection, a carrier that is defined as a continuous pilot segment for synchronous detection must be configured with a continuous pilot signal, and it is easy to identify the continuous pilot signal or other transmission signal on the receiving side. . Furthermore, the carrier can be allocated appropriately so that it does not become part of the aggregation, configuration. This paper size is applicable to the Chinese Family Standard (CNS) A4 specification (210X297). 1 ^; ^ 装 " ——--------- -„'Wide I. (Please read the notes on the back before writing this page 24 443059 A7 B7 V. Description of the invention (22) Modulate each symbol to a phase (3) frequency carrier with a specific phase and amplitude) For continuous pilot signals, the frequency, phase, and amplitude are specified, so the carrier frequency can be used as a reference on the receiving side. The terminal pilot signal s provided in the segment for differential detection is a carrier having a carrier frequency number k 'of 0 in each segment. Configuration of terminal pilot signals. It is at the periodic position where the frequency allocation of the scattered pilot signals of the adjacent synchronous detection segments is maintained. Each terminal pilot signal can complement the decentralized pilot signal. Figure 3. shows the configuration of the 'continuous pilot signal and control information signal'. An example of the arrangement of the segmented pilot signals in the synchronous detection and the segmented terminal pilot signals in the differential detection. The horizontal axis represents the frequency axis (carrier frequency configuration) in a modal manner, and the vertical axis represents the time axis (symbol direction) in a modal manner. ° The carrier frequency number k in each segment is an integer from 0 to 107. One segment consists of 108 The carrier frequency of each carrier frequency. Continuous pilot signals and control information signals are allocated to carriers different from the scattered pilot signals. The Central Standards Bureau of the Ministry of Economic Affairs prints a piece of paper-printed paper in a home store. The wind is used in centimeters 7 29 25 443059 A7 ------------ B7 V. Description of the invention ( a) Table 3 Frequency allocation of control information signal Segment number i Carrier frequency number It, No. 0 50 13 50 70 83 87 _ No. 1 25 25 63 73 SO 93 No. 2 71 4 7 17 51 η No. 3 55 36 48 55 59 86 No. 4 44 10 28 44 47 54 No. 5 25 7 25. 47 60 87 No. 6 49 49 61 96 99 104 No. 7 65 31 39 47 65 72 — No, 8 74 16 30 37 74 33 No, 9 5 5 10 21 44 61 No, 10 85 78 S2 85 9¾ 102 No. Π 70 34 48 54 70 101 No, 12 37 23 37 51 6S 105 Central Ministry of Economic Affairs The standard bureau ’s consumer cooperatives printed these decentralized pilot signals, continuous pilot signals, and terminal pilot signals according to the correspondingly allocated carrier frequency number k (by section number i and the carrier frequency in each section). The number PN (determined) of the PN (virtual random number) series wJw ^ tU) is obtained by modulating the carrier with the complex vector ck, n shown in formula (6). In the formula (6), Re {} represents the real part of the complex vector c of the carrier corresponding to the carrier frequency number k 'and the symbol number n, and Im {ck, n} represents the imaginary part. MCk, nHx2 [* -W0 (6) Ye m} = 0 This paper uses China National Standard (CNS) A4 specifications (2 丨 〇 × 297)

J Ί, ---- 7-install ------- order ------ (read first and read the notes on the back e jaya k page t 26 443059 Α7 Β7 V. Description of the invention (24 ) The control information signals set in the segments for synchronous detection and the segments for differential detection are carriers of the carrier frequency number k 'arranged in the segments shown in Table 3, and the control of the bits is transmitted for each symbol. Information. Assuming that the control information bit transmitted with the symbol of the symbol number η is Sn, the control information signal can be obtained by modulating the carrier with the complex vector ck, n shown in Equation (7). That is, the carrier transmitting the control information signal A differential 2 value PSK (Phase Shift Keyihg) modulation is applied between the symbols.

Sn = 0- >

Sn = 1

Im {ck, n} = ° Re {ck, n} = -Re {ck, nl} ^ Im {ck, n} = ° (7) However, the head symbol (symbol number n = 0) before the code box, Transmission control data ..; The signal carrier is modulated according to the above-mentioned PN series wk by the complex vector ck, n shown in formula (8). 4 Printed by Shellfish Consumer Cooperative, Central Bureau of Standards, Ministry of Economic Affairs

ReK〇} "Im {cM} = 0 2l2 " Wl (8) Furthermore, it is used when transmitting 2-bit control information for each symbol, such as the differential 4-phase PSK modulation β between symbols. The information transmission signal of the segment is arranged in the above-mentioned segmented scattered pilot signal for continuous detection, the “continuous pilot signal”, and the paper size is controlled by China: National Standard ((;; 1 ^) ^ 4 Specification (210 (乂 297 mm) 27 443 05 9 A7 B7 V. Description of the invention (25) f Carriers other than signal signals, and based on digital information, absolute phase modulation β is applied. This absolute phase modulation is used, for example, QPSK, 16QAM, 64QAM modulation. The segmented information transmission signal for synchronous detection is demodulated by the following processing. First, the pilot signal and the terminal of the frequency band are dispersed by modulating the pilot signal.

The complex vector of I pilot signals' inversely modifies the scattered pilot signals, or the necessary terminal pilot signals, and the band terminal pilot signals. In order to infer the frequency domain transmission of the scattered pilot signals and terminal pilot signals, etc. Wheel characteristics. The tween wave is used to tween the frequency and symbol directions to estimate the transmission path characteristics of the information transmission signal. The information transmission signal is divided by the transmission path characteristics thus obtained. Thereby, the information transmission signal can be demodulated from the segment for synchronous detection. The information transmission signal set in the segment for differential detection is arranged with the continuous pilot signal, the terminal pilot ##, and the carrier other than the control information signal in the above-mentioned differential detection segment. According to the digital information, Differential modulation β is applied between adjacent symbols of the carrier frequency number. This differential scheduling is used, for example, DBPSK, DQPSK, APSIC, etc. Segmented information transmission signals for differential detection can be carried by the same symbol of the previous symbol. The information transmission signal of the frequency number is divided by demodulation. ”Printed by the staff consumer cooperative of the Central Standards Bureau of the Ministry of Economic Affairs. As described above, this embodiment of the OFDM transmission method can be used in its receiving device for synchronous detection with segmented borrow filtering. The effect of the device is to perform high-quality reception. Differential detection is used for differential demodulation between numbers to perform mobile communication reception suitable for rapid changes in transmission path characteristics. At the same time, if the sync detection segment and differential detection segment are arbitrarily combined according to each segment, gp can realize a flexible service form β This paper size is common China: National Standard (CNS) Α4 specification (210 × 297 mm) 28 443059 A7 _______ Β7 " " " 1 丨 丨 1 — · V. Description of the Invention (26) And in each symbol is a carrier of the same frequency, a continuous pilot signal configured to modulate the carrier with a specific phase and amplitude , Because the frequency and phase amplitude are specified, the carrier frequency can be used as a reference on the receiving side. Figures 4 and 5 show the continuous pilot signals of 'segment for synchronous detection (13 segments, 26 carrier frequencies) and differential detection (13 segments for 78 carrier frequencies) shown in Table 2, respectively. As shown in Fig. 4 and Fig. 5, the inverse-Bollier transform pairs of the frequency configuration are pulse-like. The frequency configuration of the continuous pilot signals shown in Table 2 is not periodic. As described above, the 0FDM transmission method of this embodiment can be prevented, because the multi-path delay wave causes the entire continuous pilot signal to disappear. At the same time, using this configuration to find the inverse Fourier transform, the impulse response of the transmission path can be obtained. Furthermore, the frequency configuration of the continuous pilot signal is a configuration that is strongly related to itself. Figures 6 and 7 show the time when the inverse Fourier transform of the frequency allocation of the control information hall number shown in the synchronous detection segment and the differential detection segment shown in Figure 3, respectively, is shown in Figures 6 and 7. As can be seen in the figure, these are pulse-like, and the frequency configuration of the control information signal shown in Table 3 is not periodic. As stated above, the OFDM transmission method of this embodiment can prevent delay waves such as 'multipath' from causing the entire control information signal to disappear. Furthermore, the frequency distribution E of the additional information transmission signal including the control information signal can be set in the same manner. (Third Embodiment) Fig. 8 shows a structure of an embodiment of a transmission device that generates an OFDM signal based on the OFDM transmission methods of the first and second embodiments. This paper size applies to China National Standard (CNS) A4 specifications (210 · 〆297 mm)

Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 443059 A7 ____B7_ V. Description of the Invention (27) In Figure 8, the information transmission signal generating circuit 51 applies error control processing to the input digital information as required (error correction coding, interlaced scanning) , Energy Diffusion) and Digital Modulation "Furthermore, the basic error control processing methods and digital modulation methods commonly used in digital transmission are conventional techniques, so they are omitted. Absolute phase modulation is applied to segmented digital modulation for synchronous detection. This absolute phase modulation is used, such as QPSK, 16QAM, 64QAM modulation, etc. The segmentation system for differential detection is based on digital information, and applies differential modulation between adjacent symbols of the same carrier frequency number. This differential modulation is used, such as DBPSK, DQPSK, DAPSK, etc. The additional information signal generating circuit 52 applies error control processing (error correction coding, interlaced scanning, energy diffusion, etc.) and digital modulation to the input additional information as needed. Digital modulation uses M (M number 2 or more natural numbers) phase PSK: modulation, or differential M-phase PSK modulation in the sign direction. The control information generating circuit 56 generates transmission mode information (the number of segments for synchronous detection, the number of segments for differential detection, carrier modulation method, etc.) to specify various transmission mode information required on the receiving side. This information is applied to the additional information signal generating circuit 52 with error control processing and digital modulation, but it is also possible to apply error control processing and digital modulation different from other additional information. It is generated in the distributed pilot signal generating circuit 53 and is based on the PN (determined by the | L number) series Wj ^ wpO, 1) Modulated scattered pilot signal. It is generated in the terminal pilot signal generating circuit 54. According to the paper size corresponding to the carrier frequency, the CNS A4 specification (2 丨 0X297 mm) 30 443059 Α7 ~ * ------- Β7 5 2. Description of the invention (28) The pn (virtual random number) series Wk (Wfc = 0, 1) of the pn (virtual random number) of the carrier frequency number k (determined by the segment number i and the I frequency number in each segment) specified by the i circuit 57 ) Modulated terminal pilot signal. The frequency terminal pilot signal generating circuit 55 generates a frequency band terminal pilot signal that is modulated according to the carrier frequency number k < PN (virtual random number) series Wfc (Wk = 0, 丨) of the corresponding frequency band terminal. The continuous pilot signal is not specifically described, but it is conceivable that in the additional information signal generating circuit 52, each symbol has the same phase and the amplitude is modulated when the carrier frequency is modulated. In the carrier frequency configuration circuit 57, the outputs of the information transmission signal generating circuit 51, the additional information signal generating circuit 52, the scattered pilot signal generating circuit 53, the terminal pilot signal generating circuit 54, and the frequency band terminal pilot signal generating circuit 55 are output. (Complex vector sequence), the carrier position is arranged in the frequency domain specified by the transmission mode. For example, the output of the distributed pilot signal generation circuit 53 is in the segment for synchronous detection, and is arranged at a carrier frequency interval of N (N is a natural number of 2 or more), and The carrier of the carrier frequency is offset by L (L is a submultiple of N) for each symbol. The output 'of the terminal pilot signal generating circuit 54 is arranged in a differential detection segment on a carrier having a carrier frequency number k' = 0. The output of the additional information signal generating circuit 52 is allocated according to the frequency configuration shown in Table 1, for example. The vector sequence of each carrier of the base frequency band thus configured is input to the inverse Fourier transform circuit 58 β inverse Fourier transform circuit to transform the vector sequence of each carrier of the base frequency band generated by the carrier frequency configuration circuit 57 from the band domain In the time domain, a guard interval that is usually used is added, and output is performed occasionally. Quadrature modulation circuit 5 9 This paper scale is applicable to the country ’s national standard ("^« ^ 4 specification (210 parent 297 mm) 44a ° 5 9 V. A7 B7 Invention description (29) Inverse Fourier transform circuit 58 The round out is subjected to orthogonal modulation and converted into an intermediate frequency band. A frequency conversion circuit_converts the frequency band of the orthogonally modulated OFDM signal. It converts from an intermediate frequency band to a wireless frequency band and supplies it to an antenna, etc. When installed, it is possible to generate 0FDM signals in the OFDM transmission method described in the fourth and second embodiments. (Fourth embodiment) Fig. 9 shows that the reception method is formed according to the transmission methods in the second and second embodiments. The 0FDM signal can be used to estimate the structure of the receiving device of the impulse response in the time domain of the transmission path. In Figure 9, the tuner U converts the frequency band of the 0FDM signal received from the radio frequency band to the bottom frequency. 。Fourier Transformer 12 transforms the OFDM signal of the base band from the time domain to the frequency domain, so that the vector column of each carrier in the frequency domain is rotated out. Decentralized / terminal pilot pumping The circuit 13 extracts the scattered pilot signals and the necessary terminal pilot signals, and the band terminal pilot signals from the vector sequence output by the Fourier transform circuit 12. The vector generation circuit 14 generates the corresponding ones from the scattered / terminal pilot extraction circuit 13. Modulation complex vector 仏 of the scattered pilot signal, terminal pilot signal and frequency band terminal pilot signal. The division circuit 15 divides the complex vector generated by the vector generation circuit 14 and divides it by the scattered / terminal pilot circuit 13 The extracted scattered pilot signals, terminal pilot signals, and band terminal pilot signals are used to estimate the transmission path characteristics of the scattered pilot signals 1 terminal pilot signals and band terminal pilot signals. ^ Tweening circuit 16 is related to the division circuit.丨 5 The tween characteristics of the scattered pilot signals, terminal pilot signals, and band terminal pilot signals obtained from the transmission wheel are tweened.

This k-scale standard IT @@ 家 转 （CMS） Α4 · (2I0X297i ^ jT 32 9 * 43〇A7 B7 Printed by the Shellfish Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (3) Segmentation for synchronous detection The characteristics of the transmission path of the carrier signal of the information transmission signal. The delay circuit 17 delays the vector sequence of the Fourier transform circuit 12 by one symbol. The selection circuit 18 will segment according to the type of the segment transmitted by the control information separately. The output of the tweening circuit 16 is selected at the time, and the output of the delay circuit 17 is selected at the time of the differential detection. The output is selected by the division circuit 19, and the vector sequence output by the Fourier transform circuit 12 is divided by the output of the selection circuit 18. In circuit 19, the segment for synchronous detection is divided by the transmission path characteristics of the corresponding carriers estimated by the tween circuit 16, and the synchronous detection is performed. The segment for differential detection is preceded by a symbol output from the delay circuit 17. The vector sequence of the corresponding carrier is divided and subjected to differential detection. The demodulation circuit 20 is based on the modulation method when generating the information transmission signal, (QPSK, 16QAM, 64QAM, DBPSK , DQPSK, DAPSK, etc.) 'Demodulate the detection signal output by the division circuit 19 to obtain the transmitted digital information. With the above structure, the OFDM signal according to the OFDM transmission method described in the first embodiment can be received and demodulated The architecture described below is the one that receives the OFDM signal in accordance with the OFDM transmission method described in the second embodiment and demodulates it. First, the vector output from the continuous pilot extraction circuit 21 and the output from the Fourier transform circuit 12 The continuous pilot signal is extracted from the column. At this time, even if the segment for synchronous detection and the segment for differential detection are mixed, at least a continuous pilot signal for the segment for synchronous detection must exist, so the continuous pilot can be continuously extracted. This paper standard applies to China National Standards (CNS) 8-4 specification (297 publications)-.... (Please read the notes on the back before filling in this page Vi. Binding 33 ^ 43059 A7 B7 Ministry of Economic Affairs Printed by the Central Bureau of Work Consumer Cooperatives V. Description of the Invention (31) The vector generating circuit 22 generates a modulation complex vector ck, n corresponding to the continuous pilot signal extracted by the continuous pilot extraction circuit 21. The division circuit 23 divides the continuous pilot signal extracted by the continuous pilot extraction circuit 21 by the complex vector generated by the vector generation circuit 22, and estimates the characteristics of the transmission path of the continuous pilot signal. The inverse Fourier transform circuit 24 divides the The transmission path characteristics of the continuous pilot signal inferred by the circuit 23 are changed from the frequency domain to the time domain to obtain the pulse response of the transmission path. Tuning circuit 'Segmentation for synchronous detection can achieve high-quality demodulation by the effect of the tweening of the transmission path characteristics', and segmentation for differential detection can achieve the transmission path characteristics by the differential demodulation between symbols Demodulation of fast-moving mobile reception. At the same time, in the Fourier transform circuit 24, the impulse response characteristics of the transmission path without backlash can be obtained. As described above, the orthogonal frequency division multiplex transmission method of the present invention can be provided with a segment for differential detection suitable for mobile reception. At this time, since the terminal pilot signal and the band terminal pilot signal are provided, it is possible to freely combine the sync detection sub-segments for each segment without compromising the synchronous detection characteristics of adjacent segments for the same frequency detection. Segments and segments for differential detection to achieve flexible service patterns. At the same time, the inverse Fourier transform of the frequency configuration can be used to pulse the continuous pilot signal. If required, the transmission path without retracement during the symbol period can be required. "Impulse response characteristics" Therefore, according to the present invention, it is possible to provide, while maintaining the overall transmission capacity, the modulation of the carrier for transmitting digital information, the introduction of some suitable

I Λ's notice t " " '.f page order-this paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) 34 V. Description of the invention (32) A7 B7 Modulation of mobile reception, The continuous pilot signal is configured as, for example, an OFDM transmission method in which the impulse response of the transmission path inferred from the continuous pilot signal does not generate a turnback, which is suitable for the transmitting device and receiving device of this method. FIG. 1 shows an example of the arrangement of the pilot signals of the frequency band terminals in the first and second embodiments of the OFDM transmission method of the present invention, which are used for synchronous detection or differential detection. Segments (total 13 segments) Figure. FIG. 2 shows the first and second implementation forms of the 0Fdm transmission method of the present invention, the configuration of additional information transmission signals, the configuration of segmented pilot signals for synchronous detection, and the configuration of segmented pilot signals for differential detection. Configuration example of terminal pilot signal. FIG. 3 shows the second embodiment of the 0Fdm transmission method of the present invention, the configuration of continuous pilot signals and control information signals, the configuration of segmented pilot signals for synchronous detection, and the segmented terminals for differential detection. A diagram of a pilot signal configuration example. Fig. 4 shows the frequency allocation of the continuous pilot signals of the segmentation for synchronous detection shown in Table 2 in the second embodiment of the 0F > m transmission method of the present invention.

Item | c Write: This I Binding Time-amplitude characteristic diagram of the inverse Fourier transform printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs. Fig. 5 is a time-amplitude characteristic diagram showing the inverse Fourier transform pair of the frequency configuration of the segmented continuous pilot signal for differential detection shown in 'Table 2 in the second embodiment of the 0fdM transmission method of the present invention. FIG. 6 shows the frequency allocation of the control information signal of the synchronous detection segment shown in Table 3 in the second embodiment of the OFDM transmission method of the present invention. The paper size is applicable to China: National Standard (CNS) A4 specification (21 °). X297 mm) 35

·· *%, fill in no 443 0 R q A7 B7 Members are kindly requested to indicate clearly the employee ’s consumer cooperative cooperative Yin Le of the Intellectual Property Bureau of the Ministry of Economic Affairs mentioned on d of year b and d. Repair iL-Is there any change in the substance? V. Description of the invention (33) Time-amplitude characteristic diagram during inverse Fourier transform. FIG. 7 is a time-amplitude characteristic diagram showing the frequency distribution inverse Fourier transform of the control information signal segmented for differential detection shown in Table 3 in the second embodiment of the transmission method of the present invention. β FIG. 8 is a block circuit diagram showing the structure of a transmitting device used in the 0fdM transmission method of the present invention according to the fifth embodiment. Fig. 9 is a block diagram showing the structure of a receiving device used in the 0fdm transmission method of the present invention according to the sixth embodiment. Fig. 10 is a block circuit diagram showing the architecture of a receiving device used in the conventional OFDM transmission method. [Comparison of component numbers] 11 Tuner 12 Fourier transform circuit 13 Scatter / termination pilot extraction circuit 14 Vector generation circuit 15 Division circuit 16 Tween circuit 17 Delay circuit 18 Selection circuit 19 Division circuit 20 Demodulation circuit 21 Continuous pilot extraction circuit 22 Vector generating circuit 23 Dividing circuit This paper scale applies Chinese National Standard (CNS) A4. Specification (21 × 297 mm) 36 (Jingxian read the precautions on the back before filling out this page} Employee Cooperatives, Intellectual Property Bureau, Ministry of Economic Affairs Printed 443 05 9-A7 B7 V. Description of the invention (34) 24 Inverse Fourier transform circuit 51 Information transmission signal generation circuit 52 Additional information transmission signal generation circuit 53 Scattered pilot signal generation circuit 54 Terminal pilot signal generation circuit 55 Frequency terminal Pilot signal generation circuit 56 Control information generation circuit 57 Carrier frequency configuration circuit 58 Inverse Fourier transform circuit 59 Quadrature modulation circuit 60 Frequency transform circuit 101 Tuner 102 Fourier transform circuit 103 Scattered pilot extraction circuit 104 Vector generation circuit 105 Division Circuit 106 Tween Circuit 107 Divide circuit 108 Demodulation circuit 109 Continuous pilot extraction circuit 110 Vector generation circuit 111 Divide circuit 112 Inverse Fourier transform circuit (Please read the precautions on the back before filling this page) This paper size applies to China National Standard (CNS) A4 specifications ( 210 X 297 public love) 37

Claims (1)

Members are kindly requested to indicate whether the price printed by the Shellfish Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs of the Ministry of Economic Affairs on the day of MY, Θ, has been changed, and whether the substantive dilemma is Qin Yu; JJE :. A8 B8 C8 D8 VI. Application for Patent Scope No. 87110598 Application for Amendment of Patent Scope 1. December 22, 1989 1. Second Race _ Handover Frequency Division Multiplexing Method, which is based on K in orthogonal frequency relationship (K is an integer) orthogonal frequency division multiplex transmission method for transmitting digital information through modulation of each symbol period, which is characterized by: the number of the carrier frequency of the K carrier frequencies of the entire transmission band Set k (k is an integer that satisfies OSkgK-1); among the aforementioned K carrier frequencies, the carrier frequency number k in the aforementioned entire transmission band will set the carrier frequency that satisfies k = K-1 as the band terminal carrier frequency; the aforementioned K Within each carrier frequency, the carrier frequency number k of the entire transmission frequency band is used to divide the carrier frequency of k = K-2 into ι (ι is an integer) segments; continuous K on each frequency, (K, in order to meet K '= (K-1) / 1 integer) carrier frequencies constitute the aforementioned I segment; the symbol number is set to η (η is an integer), and the segment number is set to i (i is the number that satisfies OSiSI-1 Integer), set the carrier frequency number of K 'carrier frequencies in each segment to k' (k 'is an integer that satisfies OSk'SK, a 1) Use each of the aforementioned segments as either a segment for synchronous detection or a segment for differential detection; and in the aforementioned sync detection segment pair the symbol of the symbol number η, disperse the pilot signal in the segment. Carrier frequency number k 'satisfies k' = 3 (n mod 4) + 12p (mod represents the remaining calculation, P is an integer) Carrier frequency position >-In the aforementioned differential detection, the entire symbol is segmented to the terminal, and the terminal is piloted This paper size applies the national standard (CNS) A4 specification (210 X 297 mm) (please read the note on the back to fill in this page) 38- ~ 059 AS __ & ----- D8 VI. Patent application scope Carrier frequency number k located in this segment, which satisfies the carrier frequency position of k, = o, · Carrier frequency at the terminal frequency of the aforementioned band Frequency position, the frequency band terminal pilot signal is allocated to the entire symbol; the information transmission signal is configured at any carrier frequency position other than the position where the scattered pilot signal, the aforementioned terminal pilot signal, and the aforementioned frequency band terminal pilot signal are arranged; Frequency signal, the aforementioned terminal pilot signal and the aforementioned band terminal pilot signal are each configured carrier frequency, which can be modulated with a specific amplitude and phase by the carrier frequency number k of the entire transmission band of the carrier frequency. ; The aforementioned information transmission signal arranged in the aforementioned synchronous detection segment is subjected to absolute phase modulation of each configured carrier frequency in accordance with the aforementioned digital information: The aforementioned information transmission signal arranged in the aforementioned differential detection segment is based on The aforementioned digital information is used to differentially adjust each of the configured carrier frequencies between the symbols. For example, the soil-crossing frequency division multiplex transmission method of item 丄 of the patent application scope —— *, -......... wherein the aforementioned absolute phase modulation is any digital modulation method among QPSK modulation, 16QAM modulation, and 64QAM modulation, and the aforementioned differential modulation Variation DQPSK modulation 1 3 · —a transmission device of an orthogonal frequency division multiplex transmission method, which can transmit a signal of the orthogonal frequency division multiplex transmission method according to item 1 of the patent application garden *, which is characterized by: The capital paper scale used to output the complex vector that generates the aforementioned information transmission signal is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) • '—' 7 "J1 -install --- Please read the notes on the back first (Wash # 'Fill this page) I Printed by the Intellectual Property Bureau of the Ministry of Economy 39- 443〇5s A8 B8 C8 D8 VI. Application for a patent ; Set when forming the aforementioned segment for synchronous detection, and is used to output a dispersed vector signal generating means for generating the complex vector of the aforementioned scattered pilot signal; set when forming the aforementioned segment for differential detection, and used for output to generate the aforementioned end A terminal pilot signal generating means for a complex vector of pilot signals; a frequency band terminal pilot signal generating means for outputting the complex vector of the frequency band end and end pilot signals; a generating means for the information transmission signal and a dispersion vector Each output of the signal generating component, the aforementioned terminal pilot signal generating component, and the aforementioned band terminal pilot 彳 § number generating component is configured with a carrier frequency configuration component at a certain carrier frequency position, and is reversed by rotating the aforementioned carrier frequency configuration component. The Fourier transform 'transforms from a frequency region to a time region to generate an inverse Fourier transform component of an orthogonal frequency division multiplexed transmission signal, and the aforementioned synchronous detection uses the segmented pair symbol symbol η to dispose the aforementioned dispersed pilot signal generating component. The carrier frequency number k in the segment satisfies k '= 3 (n mod 4) + 12p (mod represents the remaining calculation, p is an integer); the aforementioned differential detection uses segmentation for the entire symbol to guide the terminal The output signal of the high-frequency signal generating component is arranged in the carrier frequency number k in the segment, which satisfies the carrier frequency position of k '= 〇; r is at the end of the aforementioned frequency band. The carrier frequency position of the carrier frequency is allocated to the entire symbol. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 x 297 mm) (please read the precautions on the back first ^ fill out this page). I. 40- Ministry of Economic Affairs Member of the Intellectual Property Bureau, Consumer Cooperation Du printed 443058 I ------------------ DS Six: The patent application scope of the band terminal pilot signal generation component rotation; dispersed in the aforementioned Pilot signal generating component; the terminal pilot signal generating component and the aforementioned frequency band terminal pilot signal generating component turn out ° at any carrier frequency position other than the configured position, the output of the information transmission signal generating component is configured; The complex vector inputted by the frequency signal generating means, the aforementioned terminal pilot signal generating means, and the aforementioned band terminal pilot signal generating means has a carrier of the entire transmission frequency band by the carrier frequency positions arranged at the respective carrier frequency configuration means. The frequency number k can be specified with a specific amplitude and phase; then the complex vector output by the information transmission signal generating means is based on the foregoing segmentation for synchronous detection according to the foregoing Digital information for absolute phase modulation; \ The aforementioned differential detection segmentation is based on the aforementioned digital information for differential modulation between symbols. ': (Such as the device of the orthogonal frequency division multiplex transmission method of item 3 of the patent application range, where' the absolute phase modulation is QPSK modulation, 16QAM modulation, 64QAM modulation, any digital modulation method, The aforementioned differential modulation is DQPSK modulation. 1/5. — A receiving device of an orthogonal frequency division multiplex transmission method, which can receive and demodulate according to the scope of patent application pen 3 or 4; [夏 ☆ 真 交 frequency The signal of the division multiplex transmission method is characterized in that: by transforming the aforementioned orthogonal frequency division multiplex transmission signal by a Fourier transform from a time region to a frequency region, the signal indicating that each paper size contained in the paper is applicable to the Chinese national standard ( CNS) A4 specification⑵0 Χ 297 公 爱) ^. »IT. Outfit -------- Order --------- > _ · _. (Please read the note on the back first ^ .Fill in this page) 8888 ABCD 443053 VI. Patent application: Fourier transform component of complex vector sequence of phase and amplitude of frequency; set to demodulate the aforementioned segmentation for synchronous detection 'and output from the aforementioned Fourier transform component Disperse the aforementioned pilot signals, and The terminal pilot signal or a scattered / terminal pilot extraction component outputted by extracting a complex vector group corresponding to the terminal pilot number of the aforementioned frequency band is provided; in the case of demodulating the segment for synchronous detection, and outputting its phase and amplitude A vector generating component that modulates a complex complex vector based on the carrier frequency number k of the entire transmission band; It is set in the case of demodulating the aforementioned synchronous detection segment, and the output of the aforementioned scattered / terminal pilot extraction component is divided by A division component that estimates the transmission path characteristics of the scattered pilot signal, the necessary terminal pilot signal, or the foregoing band terminal pilot signal in response to the output of the vector generating component of the carrier frequency position configured by the complex vector; In the case of a demodulation segment for synchronous detection, a tween component for estimating a transmission path characteristic of the aforementioned information transmission signal in the sync detection segment by outputting the division component described above; In the case of segmentation for dynamic detection; and a delay component that delays the output of the aforementioned Fourier transform component by 1 symbol time; and will demodulate the same When the demodulation is demodulated by segments, the Fourier transform component is detected by the output of the tweening component, and when the differential differential demodulation is demodulated, the output of the delay component is used to demodulate the Fourier transform component. Detection component 1 for output detection 1. 6. A type of orthogonal frequency division multiplexing transmission system, which is orthogonal to each other-Ί-ι-^ ------ y equipment --------- -Order --------- Ί ^] (Please read the first > ±. 意 事 ^ # 'on this page first) Printed by the Intellectual Property Bureau Staff Consumer Cooperatives 42- A8 B8 C8 DB 443〇59 VI. Orthogonal frequency division multiplexing transmission method for transmitting digital information by modulating κ (κ is an integer) carrier frequency in the range relationship of patent application, which is characterized by: The carrier frequency number of K carrier frequencies in the entire transmission band is set to k (k is an integer that satisfies OSkSK — 1); within the aforementioned κ carrier frequencies, the carrier frequency number k in the aforementioned entire transmission band will satisfy k = K-1 The carrier frequency is set to the terminal frequency of the band; within the aforementioned K carrier frequencies, the carrier frequency in the aforementioned entire transmission band The code k divides the carrier frequency of k = K—2 into 1 (1 is an integer) segments; K '(K, which is an integer that satisfies K, = (K — 1) / 1) continuous at the respective frequencies Each carrier frequency constitutes the aforementioned I segment; the symbol number is set to η (η is an integer), the segment number is set to i (i is an integer that satisfies OSiSI-1), the K in each segment is The carrier frequency number of the frequency is set to k5 (t is an integer that satisfies OS k'S K, an integer of 1) > each of the foregoing segments is used as one of the segments for synchronous detection or the segments for differential detection; Synchronous detection uses the segment pair symbol number η, and the carrier frequency number k 'in the segment satisfies the carrier frequency position of k' = 3 (n mod 4) + 12p (mod represents the remaining calculation, P is an integer), Allocate scattered pilot signals, and place additional information transmission signals at specific carrier frequencies for all symbols; In the aforementioned differential detection, segment the entire symbol, and place the terminal pilot in the carrier frequency number in that segment k 'satisfies the carrier frequency position of k, = 0, and the additional information transmission signal is allocated to a specific carrier frequency bit for all symbols. This paper size is applicable to China Standard (CNS) A4 (210 χ 297 mm) (Please read the precautions on the back before filling out this page)-Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economy—43 _ 443〇59 As B8 C8 ^ —______—__ D8 —---- — _______________ 6. Apply for a patent application; (Please read the notes on the back before filling out this page) Configure the frequency band for the entire symbol at the carrier frequency position of the carrier frequency of the other band A terminal pilot signal; an information transmission signal is configured at any carrier frequency position other than a position where the aforementioned distributed pilot signal, the aforementioned terminal pilot signal, the terminal pilot signal of the frequency band described above, and the aforementioned additional information transmission signal are configured; The pilot signal, the aforementioned terminal pilot signal, and the aforementioned band terminal pilot signal are each configured carrier frequency, which can be adjusted with a specific amplitude and phase by the carrier frequency number k of the entire transmission band of the carrier frequency. The aforementioned additional information transmission signal is based on the additional information to differentially modulate a specific carrier frequency between symbols; and is arranged in the aforementioned segment of the synchronous detection The information transmission signal is based on the aforementioned digital information, and each of the configured carrier frequencies is subjected to absolute phase modulation. The aforementioned information transmission signal, which is arranged in the segment for differential detection, is configured according to the aforementioned digital information. The carrier frequency is differentially modulated. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 7. If the orthogonal frequency division multiplex transmission method of item 6 of the patent application park, ".Λ, the differential modulation of the aforementioned additional information transmission signal is DBPSK modulation The absolute phase modulation of the aforementioned information transmission signal is QPSK modulation, 16QAM modulation, 64QAM modulation, and the digital modulation of the aforementioned information transmission signal is DQPSK modulation. Applicable national standard (CNS) A4 specification (210 X 297 mm) -44 ** VI. Patent application range 8.- Sending device with cross-frequency division multiple transmission method, please send item 6 of the patent scope The positive rate is a signal that can be transmitted. It has the following features: the transmission wheel m2 outputs an information transmission signal generating member that generates the above-mentioned complex vector sequence of f-signal rotation signals; and J is set when forming the aforementioned sections for synchronous detection. , Is used to output the dispersion generating means for generating the complex direction of the aforementioned material distribution frequency; No. is set when the aforementioned differential detection segment is formed, and is used to output the aforementioned complex material-like complex terminal for outputting the final material. Pilot signal generating means; Band terminal pilot signal generating means for outputting a complex vector of the aforementioned band terminal pilot signal; Additional information transmission signal generating means for outputting a complex vector of the aforementioned additional information transmission signal: Economy The Ministry of Intellectual Property Bureau and Consumer Cooperative printed the information transmission signal generation component, the aforementioned dispersed vector signal generation component, the terminal pilot signal generation component, the band terminal pilot signal generation component, and the additional information transmission signal generation component. The carrier frequency configuration component whose respective output is arranged at a certain carrier frequency position; and the inverse Fourier transform of the output of the aforementioned carrier frequency configuration component is used to convert from the frequency region to the time region to generate the inverse of orthogonal frequency division multiplexed transmission signals The Fourier transform component, the symbol of the symbol number η in the aforementioned segmentation for synchronous detection is applicable to this paper size_National Standard (CNS) A4 (210 x 297 mm) ~ 45- ABCS 44305 9 6. Apply for a patent Range • ,,: · ---- Γ., I— —-- 1 — -Ά -Install ---- .. < Please read the unintentional thing on the back ^ #-'Fill this page) The carrier frequency number k' in the segment satisfies k '= 3 (n mod 4) + 12p (mod (Representing the remaining calculation, p is an integer) carrier frequency position, the output of the aforementioned scattered pilot signal generating component is configured, and the additional information transmission signal is arranged at a specific carrier frequency position for the full symbol; in the aforementioned differential detection, the segment pair is used For the entire symbol, the output of the terminal guide gauge signal generating component is arranged in the carrier frequency number k in the segment, which satisfies the carrier frequency position of k '= 0, and the output of the additional information transmission signal generating component is configured for a specific symbol. The position of the bearer must be; the output of the band terminal pilot signal generating means is allocated to the entire symbol at the carrier frequency position of the carrier frequency of the aforementioned frequency band; the decentralized pilot signal generating means, the terminal pilot signal generating means, and the band terminal pilot Frequency signal generating component and any additional carrier frequency position other than the position where the output of the additional information transmission signal generating component is configured, the output of the information transmission signal generating component is configured; Intellectual Property Bureau of the Ministry of Economic Affairs The industrial and consumer cooperatives print the complex vector inputted by the decentralized pilot signal generating means, the terminal pilot signal generating means, and the frequency band terminal pilot signal generating means. The carrier frequency number k of the entire transmission band of the carrier frequency position can specify a specific phase and amplitude; the complex vector output by the additional information transmission signal generating means is subjected to differential modulation between symbols according to the additional information. The complex vector output by the information transmission signal generating component is based on the aforementioned paper for synchronous detection based on the aforementioned digital information. The paper scale is applicable (@ 家 标准 x Norwegian mm) 46 · f .. 443 0§i 80088 A25CD 6. The scope of patent application is phase modulation; the aforementioned differential detection segmentation is based on the aforementioned digital information and performs differential modulation between the symbols. 9. The transmitting device of the orthogonal frequency division multiplex transmission method according to item 8 of the patent application scope, wherein the differential modulation of the complex vector output by the aforementioned additional information transmission signal generating means is DBPSK modulation, and the aforementioned information The absolute phase of the complex vector output by the transmission signal generating component is cyclically modified by any of the digital modulation methods among QPSK modulation, 16QAM modulation, and 64QAM modulation. The differential modulation is Dqpsk modulation. 10 · —A kind of orthogonal frequency division multiplexing transmission device, which can receive and demodulate the orthogonal frequency division sent by the transmission device of the orthogonal frequency division multiplexing transmission method of the patent application No. 8 or 9. Multi-pass signal, (Please read the note on the back #, fill out this page). Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs % vi.