JP2010283411A - Transmission/reception system, transmitter and receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission/reception system capable of accurately reproducing signals even in a transmission line environment of a deteriorated communication state. <P>SOLUTION: The transmission/reception system includes: a first conversion signal calculation part 114 for calculating a first auxiliary signal on the basis of a first reception signal and a first shifted reception signal for which the first reception signal is shifted for a prescribed time, and calculating and outputting a second auxiliary signal on the basis of a second reception signal and a second shifted reception signal for which the second reception signal is shifted for the prescribed time; an auxiliary power calculation part 115 for calculating and outputting auxiliary power from the first auxiliary signal and the second auxiliary signal; and a first signal reproduction part 116 for calculating and outputting a reception determination signal for determining the first reception signal and the second reception signal from reception power and the auxiliary power. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a transmission / reception system, a transmitter, and a receiver that perform communication between a transmitter and a receiver, and in particular, transmission / reception in a poor communication state such as when noise or unwanted wave power is large or in a mobile reception environment. The present invention relates to a technique for accurately establishing a received signal even under an environment.

  In general, when performing communication, it is necessary to mutually recognize a signal format, a modulation method, a modulation method, a multiplexing method, a used transmission / reception frequency, and the like used between transmission and reception. On the receiving side, since the signal may not be received correctly unless the timing at which the signal is transmitted from the transmitting side is recognized, the transmitting side accurately conveys information necessary for the above recognition to the receiving side, The receiving side must have a mechanism for accurately identifying the received signal based on the information.

  In order to realize such a mechanism, there is a method of periodically multiplexing and transmitting the above information as a control signal to transmission data. Such a control signal is generally called a preamble or a postamble, and when transmitting an information signal from a transmitter, a method is usually used in which the signal is multiplexed in time or frequency in distinction from the information signal. It has been.

  This method includes not only authentication for the receiving side to recognize the communication partner, discrimination of communication means such as a modulation method and multiplexing method used for communication, identification of the control signal start time and information signal start time. It is already used as various communication rules because it can be used effectively even when only the signal you want to receive is detected, such as when the power of the received signal becomes very weak and buried in noise. (For example, refer nonpatent literature 1 and nonpatent literature 2).

  There is a known signal sequence as one of control signals for constructing the system as described above, and a pattern matching method is generally used as means for identifying a signal using the sequence. The pattern matching method is a method in which a known signal sequence is multiplexed in advance with a transmission signal sequence, and a transmission signal sequence received by a receiver is collated with a known signal sequence to completely match or set a predetermined threshold for matching. This is a method of identifying a desired signal for reception when exceeding.

  The known signal sequence is, for example, a digital signal in which two or more codes are periodically changed according to time, and there are various usage methods depending on a system to be communicated.

  For example, in a communication system in which a plurality of users are connected to one central station, each central station communicates using a unique known signal sequence so that the central station grasps the users in communication. Is possible. Further, for example, in a communication system that transmits and receives a signal in which an identification signal describing a communication method and a communication speed and an information signal desired to be transmitted are multiplexed, a sender inserts a known signal sequence into the identification signal. Thus, the receiver can distinguish the identification signal from the information signal.

  Furthermore, when communication is performed on a transmission path in which a plurality of communication systems using the same frequency band are mixed, the receiving side uses the known signal sequence by inserting it into the identification signal as described above. It is possible to detect and receive only the signal of the communication system. In this method, the power of the signal desired to be received is sufficiently large compared to the power of the signal (interference wave or interference wave) not desired to be received. However, since it is effective, it can be said that it is effective as a communication mode in a weak electric field environment (for example, see Non-Patent Document 3).

  However, in a weak electric field environment, since the electric field level of the received signal is generally very small, the signal power of the desired wave has power that is about the same as or lower than the noise power. In such a case, even if a known signal sequence is inserted, the received signal is buried in the noise signal, so that there are many cases where the matching cannot be performed accurately. Therefore, a mechanism for accurately reproducing the received signal is required even in an environment where the communication state is poor such as a weak electric field environment.

  As the above countermeasure, for example, when a received signal is not synchronized, a synchronization signal pattern is detected using information on changes in a known signal sequence, and after synchronization is completed, the synchronization signal is continued using the synchronization signal pattern. A method is disclosed in which stable synchronization can be performed by detecting even when the ratio of received signal power to noise power (CN ratio) is poor (see, for example, Patent Document 1).

  Also, for example, when the synchronization power cannot be ensured because the power of the preamble included in the synchronization burst frame is small, synchronization is ensured by securing synchronization using a synchronization word signal included in a communication channel that is a channel different from the synchronization burst frame. A method for improving the probability of securing is disclosed (for example, see Patent Document 2).

  Further, for example, a method is disclosed in which synchronization can be established even if the reception environment is bad by detecting a signal obtained by compressing a signal sequence expressed using a sine wave (see, for example, Patent Document 3).

JP 2001-308944 A (FIG. 1) Japanese Patent Laying-Open No. 2004-254069 (FIG. 1) Japanese Patent Laid-Open No. 4-023534

Hideaki Matsue et al., “High-speed wireless access technology”, The Institute of Electronics, Information and Communication Engineers, March 2004, p. 211-218 By Shiro Sakata, “Wireless Ubiquitous”, Hidekazu System, August 2004, p. 62-68 Seiichi Sampei, “Digital Wireless Transmission Technology”, Pearson Education, September 2002, p. 296-304

  In Patent Document 1, if the synchronization signal pattern in the asynchronous state is erroneously detected, the subsequent synchronization detection will continue to be erroneous. In addition, there is a problem that there is a high possibility of erroneous detection of synchronization in a transmission path environment where the communication state is poor such as a weak electric field environment.

  Further, Patent Document 2 has a problem that synchronization cannot be ensured in an environment where the communication state is poor such that the reception power is extremely low.

  Further, in Patent Document 3, in a transmission path in which a delayed wave having a large power exists and a communication state is poor, or in a mobile reception environment in which a Doppler frequency shift occurs, the characteristics of the received signal are affected by distortion due to envelope fluctuation or phase rotation. However, there is a problem that the synchronization position shifts or cannot be synchronized due to unexpected changes.

  The present invention has been made to solve these problems, and an object of the present invention is to provide a transmission / reception system capable of accurately reproducing a signal even in a transmission path environment having a poor communication state.

  In order to solve the above problems, a transmission / reception system according to the present invention performs communication between a transmitter and a receiver, and the transmitter generates a first sine wave and a second sine wave. A wave generator and a transmission signal are distributed to two systems, a first sine wave is inserted into a signal of one system and a first original signal is output, and a second sine wave is inserted into a signal of the other system A signal insertion unit for outputting the second original signal, and the receiver receives the first original signal and the second received signal obtained by receiving the second original signal. A first auxiliary signal is calculated based on a received power calculation unit that calculates and outputs received power from the first received signal and a first transition received signal obtained by shifting the first received signal for a predetermined time; The second auxiliary signal is calculated based on the two received signals and the second transition received signal obtained by shifting the second received signal for a predetermined time. A first converted signal calculating unit that outputs the first converted signal, an auxiliary power calculating unit that calculates and outputs auxiliary power from the first auxiliary signal and the second auxiliary signal, and the first received signal and the first power from the received power and auxiliary power. A first signal reproduction unit that calculates and outputs a reception determination signal that determines two reception signals; and a signal control unit that controls and outputs the first reception signal and the second reception signal based on the reception determination signal. It is characterized by.

  According to the present invention, the first auxiliary signal is calculated based on the first received signal and the first transition received signal obtained by shifting the first received signal for a predetermined time, and the second received signal and the second received signal are determined in advance. A first converted signal calculation unit that calculates and outputs a second auxiliary signal based on the second transition reception signal that has been shifted in time, and calculates and outputs auxiliary power from the first auxiliary signal and the second auxiliary signal. A transmission path having a poor communication state because it includes an auxiliary power calculation unit and a first signal regeneration unit that calculates and outputs a reception determination signal for determining the first reception signal and the second reception signal from the reception power and the auxiliary power It is possible to accurately reproduce the signal even in an environment.

It is a block diagram of the transmission / reception system by Embodiment 1 of this invention. It is a block diagram of the transmission / reception system by Embodiment 2 of this invention. It is a block diagram of the transmission / reception system by Embodiment 3 of this invention. It is a block diagram of the signal insertion part by Embodiment 1 of this invention. It is a figure which shows an example of the output of the signal insertion part by Embodiment 1 of this invention. It is a block diagram which shows an example of the received power calculation part by Embodiment 1 of this invention. It is a block diagram which shows an example of the 1st conversion signal calculation part by Embodiment 1 of this invention. It is a block diagram which shows an example of the conversion signal calculation part by Embodiment 1 of this invention. It is a block diagram which shows an example of the signal converter by Embodiment 1 of this invention. It is a block diagram which shows an example of the auxiliary power calculation part by Embodiment 1 of this invention. It is a block diagram which shows an example of the signal auxiliary | assistance part by Embodiment 1 of this invention. It is a block diagram of the 1st signal reproduction part by Embodiment 1 of the present invention. It is a figure which shows an example of the output of the received power calculation part by the Embodiment 1 of this invention, and an auxiliary power calculation part. It is a figure which shows another example of the output of the received power calculation part by the Embodiment 1 of this invention, and an auxiliary power calculation part. It is a figure which shows the effect of the transmission / reception system by Embodiment 1 of this invention. It is a block diagram of the 2nd signal reproducing part by Embodiment 2 of the present invention. It is a block diagram which shows an example of the 2nd conversion signal calculation part by Embodiment 2 of this invention. It is a block diagram which shows an example of the 3rd conversion signal calculation part by Embodiment 3 of this invention. It is a block diagram of the 3rd signal reproducing part by Embodiment 3 of the present invention. It is a block diagram which shows an example of the signal converter by Embodiment 1 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

<Embodiment 1>
FIG. 1 is a block diagram of a transmission / reception system according to Embodiment 1 of the present invention, which includes a transmitter that transmits an information signal obtained by multiplexing a sine wave with respect to an input signal, and a receiver that receives the information signal. Communication is performed between the receiver and the receiver using radio signals.

As shown in FIG. 1, the transmission / reception system according to the first embodiment is a transmission / reception system that performs communication between a transmitter 100 and a receiver 110, and the transmitter 100 includes a first sine wave S (t) and The sine wave generation unit 101 that generates the second sine wave C (t) and the transmission signal I (t) are distributed to two systems, and the first sine wave S (t) is supplied to the signal I ₁ (t) of _one system. Is inserted to output the first original signal B ₁ (t), and the second sine wave C (t) is inserted into the signal I ₂ (t) of the other system to obtain the second original signal B ₂ (t). A signal insertion unit 102 for outputting.

The receiver 110 includes first and reception signal J ₁ (t) obtained by receiving the first original signal B ₁ a (t), obtained by receiving the second original signal B ₂ (t) A received power calculation unit 113 that calculates and outputs received power P (t) from the second received signal J ₂ (t), a first received signal J ₁ (t), and the first received signal J ₁ (t) The first auxiliary signal M ₁ (t) is calculated based on the first transition reception signal J ₁ (t−t1) that has been shifted for a predetermined time, and the second reception signal J ₂ (t) and the second reception signal are calculated. and J ₂ first converted signal calculating section 114 for outputting the second auxiliary signal M ₂ calculates the (t) based on a second transition reception signal J ₂ (t-t2) in which a (t) for a predetermined time course a first auxiliary signal M ₁ (t) and the second auxiliary signal M ₂ (t) because the auxiliary power a (t) supplemental power calculation unit 115 which calculates and outputs a received power P (t) From the auxiliary power A (t) and the first reception signal J ₁ (t) and the second reception signal J ₂ (t) first signal reproducing unit 116 for receiving decision signal to calculate the G (t) output to determine the And a signal control unit 117 that controls and outputs the first reception signal J ₁ (t) and the second reception signal J ₂ (t) based on the reception determination signal G (t).

  In the transmitter 100, the signal insertion unit 102 receives the input signal I (t) and the signals S (t) and C (t) generated and output from the sine wave generation unit 101. Here, (t) indicates a signal value at time t.

The signals S (t) and C (t) generated and output by the sine wave generator 101 are sine waves orthogonal to each other, and the signals S (t) and C (t) are expressed by, for example, equations ( There are combinations of 1) and formula (2). Here, f _{s in} both equations is a predetermined frequency.

S (t) = sin (2πf s t) ··· (1)
C (t) = cos (2πf s t) ··· (2)
The signal insertion unit 102 multiplexes the sine waves S (t) and C (t) with the input signal I (t) input. As a multiplexing method of the sine waves S (t) and C (t), time division multiplexing is used, and a configuration example thereof is shown in FIG. FIG. 4 is a block diagram illustrating an example of the signal insertion unit 102 according to the first embodiment of the present invention. As shown in FIG. 4, in the signal insertion unit 102, the input signal I (t) is distributed to two systems of signals I ₁ (t) and I ₂ (t) by the signal insertion unit 102, and I ₁ (t) S (t) is multiplexed by the time switch 401 and outputted as the first original signal B ₁ (t), and C ₂ (t) is multiplexed by I ₂ (t) by the time switch 401 and the second original signal. It is output as B ₂ (t). The time switch 401 operates so that both the sine waves S (t) and C (t) are inserted into the input signal I (t) for a predetermined time interval from the same time. FIG. 5 is a diagram illustrating an example of the output of the signal insertion unit 102 according to the first embodiment of the present invention. The first original signal B ₁ (t) and the second original signal B ₂ (t) output from the signal insertion unit 102 are respectively output as signals shown in FIG.

The transmission control unit 103 performs transmission signal control on the input first original signal B ₁ (t) and second original signal B ₂ (t) and outputs a transmission modulation signal T (t) as a transmittable state. To do. Then, the transmission modulation signal T (t) is transmitted from the transmission antenna 104 connected to the transmitter 100. The transmission signal control performed by the transmission control unit 103 includes, for example, an encoding process, a modulation process, a frequency conversion, a signal band limiting process, etc., but only a part of these processes may be performed. , Processes other than these may be included.

  On the other hand, the transmission modulation signal T (t) transmitted from the transmitter 100 is received as the reception modulation signal R (t) by the reception antenna 111 connected to the receiver 110.

In the receiver 110, the received reception modulation signal R (t) is input to the reception control unit 112, and the first reception signal J ₁ (t) and the second reception are set in a state in which reception signal control is performed and predetermined signal processing is possible. Output as signal J ₂ (t). The reception signal control performed by the reception control unit 112 includes, for example, signal band limiting processing, frequency conversion, demodulation processing, decoding processing, etc., but only some of these processing may be performed. Moreover, processes other than these may be included.

The first reception signal J ₁ (t) and the second reception signal J ₂ (t) output from the reception control unit 112 are input to the signal control unit 117, the reception power calculation unit 113, and the first converted signal calculation unit 114. Is done.

The signal control unit 117 controls the first reception signal J ₁ (t) and the second reception signal J ₂ (t) based on the signal G (t) that is the output of the first signal reproduction unit 116, and the information signal O Output as (t). The signal G (t) and the first signal reproduction unit 116 will be described in detail later.

The received power calculation unit 113 calculates a power value from the input first received signal J ₁ (t) and second received signal J ₂ (t) and outputs it as received power P (t). FIG. 6 is a block diagram illustrating an example of the received power calculation unit 113 according to the first embodiment of the present invention. As shown in FIG. 6, the square of the first reception signal J ₁ is input in the first power calculation unit 601 (t) is calculated, the square of the second received signal at the second power calculating unit 602 J ₂ (t) Is calculated. Then, the first adder 603 adds the outputs of the first power calculator 601 and the second power calculator 602, and outputs the result as received power P (t).

The first converted signal calculation unit 114 converts the input first received signal J ₁ (t) by m types of methods and outputs m types of signals. Further, the second received signal J ₂ (t) is also converted by m kinds of methods and outputs m kinds of signals. In FIG. 1, for simplicity, these m types of signals are expressed as a first auxiliary signal M ₁ (t) and a second auxiliary signal M ₂ (t), respectively. Here, m is a positive integer.

FIG. 7 is a block diagram showing an example of the first converted signal calculation unit 114 according to Embodiment 1 of the present invention. As shown in FIG. 7, one of the first received signals J ₁ (t) input to the first converted signal calculation unit 114 is input to the first transition circuit 701 to generate m types of time transition circuits (first time). After the signal processing is performed by the transition circuit to the m-th time transition circuit, the signal is input to the signal conversion unit 702, and the other is directly input to the signal conversion unit 702 without passing through the first transition circuit 701. Similarly, one of the second received signals J ₂ (t) is input to the first transition circuit 701, and signal processing is performed by m types of time transition circuits (first time transition circuit to mth time transition circuit). After being performed, the signal is input to the signal conversion unit 702, and the other is directly input to the signal conversion unit 702 without going through the first transition circuit 701.

In the first hour transition circuit of the first transition circuit 701, the first reception signal J ₁ (t) or the second reception signal J ₂ signal J ₁ where (t) were respectively allowed to transition by time t ₁ (t-t ₁₎ Alternatively, J ₂ (t−t ₁ ) is output and input to the first signal converter of the signal converter 702. Here, t ₁ is a real number other than 0. In the second time transition circuit, the signal J ₁ (t−t ₂ ) or J ₂ (J ₂ (t)) obtained by shifting the first reception signal J ₁ (t) or the second reception signal J ₂ (t) by time t ₂ , respectively. t−t ₂ ) is output and input to the second signal converter. Here, t ₂ is a real number other than 0. Similarly, in the m-th time transition circuit, the signal J ₁ (t−t _m ) or J _{2 obtained} by shifting the first reception signal J ₁ (t) or the second reception signal J ₂ (t) by the time t _m , respectively. (T−t _m ) is output and input to the m-th signal converter. Here, t _{1 to} t _m are desirably different numerical values, and may be values that change according to time.

The signal conversion unit 702 includes, for example, m types of signal conversion units (first signal conversion unit to m-th signal conversion unit). In the first signal converter of the signal converter 702, the first auxiliary signal M is based on the value of the first received signal J ₁ (t) and the signal J ₁ (t−t ₁ ) output from the first time transition circuit. ₁ (t) is output, and the second auxiliary signal M is output based on the second received signal J ₂ (t) and the value of the signal J ₂ (t−t ₁ ) output from the first time transition circuit. ₂ Outputs the signal constituting (t). Similarly, in the m signal conversion unit, a first reception signal J ₁ (t) and the m time course signal output from circuit J ₁ (t-t _m) first auxiliary signal M ₁ based on the value of ( outputs a signal constituting a t), a second reception signal J ₂ (t) and the m time course circuit signal output from J ₂ (t-t _m) a second based on the value the auxiliary signal M ₂ ( The signal which comprises t) is output.

  FIG. 9 is a block diagram showing an example of the signal conversion unit 702 according to Embodiment 1 of the present invention. Since the first signal conversion unit to the m-th signal conversion unit can have the same configuration except that the signal input to each signal conversion unit and the signal output from each signal conversion unit are different, in FIG. The configuration and operation of the m-th signal conversion unit 702m will be described.

As shown in FIG. 9, the first adder / subtractor 901 (first auxiliary signal calculator) outputs the sum or difference of two input signals. For example, when the first adder / subtractor 901 outputs the difference between the signal J ₁ (t) and the signal J ₁ (t−t _m ), the calculation represented by Expression (3) is performed.

M _1m (t) = J ₁ (t) −J ₁ (t−t _m ) (3)
The second adder / subtractor 902 (second auxiliary signal calculator) has the same configuration and operation as the first adder / subtractor 901, and outputs the sum or difference of two input signals. For example, when the second adder / subtracter 902 outputs the difference between the signal J ₂ (t) and the signal J ₂ (t−t _m ), the calculation represented by the equation (4) is performed.

M _2m (t) = J ₂ (t) −J ₂ (t−t _m ) (4)
On the other hand, the signal conversion unit 702 can also be configured with an FIR (Finite Impulse Response) filter, for example, as shown in FIG. As shown in FIG. 20, a first reception signal J ₁ (t) and the second reception signal J ₂ (t), all of the output of the first transition circuit 701 (first hour transition circuit to an m-th time transition circuit) Alternatively, part of the signals may be input to m types of filters (first to mth filters), and the first auxiliary signal M ₁ (t) and the first auxiliary signal M ₂ (t) may be output from each filter. it can. The m types of FIR filters used in the signal conversion unit 702 are preferably Hilbert transform filters that output orthogonal components of the input signal, but are not limited thereto. Further, the signal conversion unit 702 is not limited to the above configuration example.

The time t _m represented by the equations (3) and (4) can be set to an arbitrary magnitude, but if the time t _m is a very small time, the first auxiliary signal is configured. The value obtained by dividing the signal M _1m (t) by the time t _m is a value obtained by differentiating J ₁ (t), and the value obtained by dividing the signal M _2m (t) constituting the second auxiliary signal by the time t _m is J _2. A value obtained by differentiating (t). When these are expressed by equations, equations (5) and (6) are obtained. However, df (t) / dt represents the differential value of the function f (t).

M _1m (t) = {dJ ₁ (t) / dt} × t _m (5)
M _2m (t) = {dJ ₂ (t) / dt} × t _m (6)
From the above, the first conversion signal calculation unit 114 can be configured as shown in FIG. As shown in FIG. 8, for example, the first conversion signal calculation unit 114 includes a differentiating unit 801, and the differentiating unit 801 includes m types of differentiators (first to m-th differentiators).

Since the first differentiator to the mth differentiator can have the same configuration except that the signal input to each differentiator and the signal output from each differentiator are different, in FIG. The configuration and operation of the device 801m will be described. The m-th differentiator 801m has a function of calculating a differential value of J ₁ (t), a function of calculating a differential value of J ₂ (t), and a function of multiplying a coefficient t _m. If the calculation represented by (5) and Expression (6) is performed, the signal M _1m (t) constituting the first auxiliary signal and the signal M _2m (t) constituting the second auxiliary signal are output. Can do.

The auxiliary power calculation unit 115 outputs m types of auxiliary powers A ₁ (t) to A _m (t) based on the first auxiliary signal M ₁ (t) and the first auxiliary signal M ₂ (t). It is characterized by.

  FIG. 10 is a block diagram illustrating an example of the auxiliary power calculation unit 115 according to Embodiment 1 of the present invention. As illustrated in FIG. 10, the auxiliary power calculation unit 115 includes an auxiliary unit 1001, and the auxiliary unit 1001 includes m types of signal auxiliary units (first signal auxiliary unit to m-th signal auxiliary unit).

  Since the 1st signal auxiliary | assistant part-m-th signal auxiliary | assistant part can be set as the same structure except the signal input into each signal auxiliary | assistant part and the signal output from each signal auxiliary | assistant part differing in FIG. The configuration and operation of the m-th signal auxiliary unit 1001m will be described.

FIG. 11 is a block diagram illustrating an example of the m-th signal auxiliary unit 1001m according to Embodiment 1 of the present invention. The m-th signal auxiliary unit 1001m is calculated from the signal M _1m (t) constituting the first auxiliary signal M ₁ (t) and the signal M _2m (t) constituting the second auxiliary signal M ₂ (t). The power value is output as power A _m (t) constituting auxiliary power A (t). As shown in FIG. 11, the third power calculator 1101 calculates the square of the signal M _1m (t), and the fourth power calculator 1102 calculates the square of the signal M _2m (t). Then, the second addition unit 1103 adds the outputs of the third power calculation unit 1101 and the fourth power calculation unit 1102 and outputs the result as power A _m (t). In FIG. 1, for simplicity, A ₁ (t) to A _m (t) are collectively expressed as auxiliary power A (t).

  The first signal regeneration unit 116 determines a received signal using a part or all of the received power P (t) and the auxiliary power A (t), and generates a reception determination signal G (t) corresponding to the determination result. It is characterized by outputting.

FIG. 12 is a block diagram of the first signal reproducing unit 116 according to Embodiment 1 of the present invention. As shown in FIG. 12, the first signal regeneration unit 116 according to the first embodiment includes a power determination unit 1201 that outputs a comparison result between the received power P (t) and a predetermined value 1203 for determination, and auxiliary power (A ₁ (T) to A _m (t)) and m types of auxiliary power determinations for outputting comparison results of m types of auxiliary determination predetermined values 1204 (first determination auxiliary predetermined value to mth auxiliary determination predetermined value). Unit 1202 (first auxiliary power determination unit to m-th auxiliary power determination unit), and the reception determination signal G (t) is determined and output from the comparison result by the power determination unit 1201 and the comparison result by the auxiliary power determination unit 1202 A first power signal determination unit 1205.

  The first auxiliary power determination unit to the m-th auxiliary power determination unit can have the same configuration except that the signal input to each auxiliary power determination unit and the signal output from each auxiliary power determination unit are different. . Further, the first determination auxiliary predetermined value to the m-th determination auxiliary predetermined value may have the same configuration except that signals output from the respective determination auxiliary predetermined values are different.

The power determination unit 1201 compares the input received power P (t) with the output of the determination predetermined value 1203 and outputs the comparison result to the first power signal determination unit 1205. The output value of the comparison result is, for example, 1 (first power determination signal) when the value of P (t) is equal to or greater than the output of the predetermined value for determination 1203, and the value of P (t) is the predetermined value for determination 1203 There is a method of setting 0 (second power determination signal) when the output is smaller than the output. Similarly, the m-th auxiliary power determination unit 1202m compares the input auxiliary power A _m (t) with the output of the m-th determination auxiliary predetermined value 1204m, and outputs the comparison result to the first power signal determination unit 1205. To do. The output value of the comparison result, for example, the case where the value of A _m (t) is equal to or greater than the output of the first m judgment auxiliary predetermined value 1204m and 1 (first auxiliary power determination signal), the value of A _m (t) There is a method of setting 0 (second auxiliary power determination signal) when the output is smaller than the output of the mth determination auxiliary predetermined value 1204m.

  The first power signal determination unit 1205 can take the majority of the output of the power determination unit 1201 and the output of the auxiliary power determination unit 1202 and output the result as G (t). That is, the first power signal determination unit 1205 receives the result when more than half of all the results output from the power determination unit 1201 and the auxiliary power determination unit 1202 are equal, or receives the result. ). As an example, when n = 6, if the output of the power determination unit 1201 and the output of the auxiliary power determination unit 1202 are 1, 1, 1, 1, 0, 1, 0 in order, the majority decision is taken. The received signal G (t) can be determined as G (t) = 1.

The signal control unit 117 controls the first reception signal J ₁ (t) and the second reception signal J ₂ (t) based on the reception determination signal G (t) input from the first signal reproduction unit 116, A desired output signal O (t) is obtained and output.

  In the case of reproducing a signal sequence expressed by binary values of a mark and a space with added noise as binary data, a method of calculating a power value in a predetermined time interval and comparing it with a threshold value is generally used. ing. When this method is used, data can be reproduced without error if the received signal power is sufficiently larger than the noise power. However, if the received signal power is about the same or smaller than the noise power, it is reproduced as erroneous data. Often occurs.

  In contrast to the conventional method described above, the embodiments of the present invention can generate a plurality of auxiliary signals having different noise characteristics by converting the received signal. Then, a signal series having different noise characteristics is reproduced by obtaining the power of each generated auxiliary signal.

  Further, in the embodiment of the present invention, the final reception decision signal is a result of majority decision of a plurality of generated signal sequences. Since this is equivalent to taking an ensemble average of signal sequences having different noise characteristics, the possibility that the noise is smoothed and the signal is correctly reproduced is improved. Furthermore, since the ensemble average generally does not cause a time delay required for the averaging process, the present embodiment has an effect that the real-time property is improved as compared with the method of smoothing noise using the time average.

  Further, in the embodiment of the present invention, using the fact that sin θ and cos θ are different from each other (equations (7) and (8)), a received signal and a signal obtained by changing the received signal for a predetermined time, The difference is generated as an auxiliary signal. In the equations (7) and (8), θ is an arbitrary angle.

(D / dt) sin θ = cos θ (7)
(D / dt) cos θ = −sin θ (8)
Further, the identity represented by the equation (9) is established between sin θ and cos θ.

sin ² θ + cos ² θ = 1 (9)
Therefore, in the embodiment of the present invention, the reception power and auxiliary power in the mark portion are ideally constant values, which is convenient when compared with the threshold value.

  The above effect will be described with reference to FIG. FIG. 13 is a diagram illustrating an example of outputs of the received power calculation unit 113 and the auxiliary power calculation unit 115 according to the first embodiment of the present invention. As shown in FIG. 13, the transmission signal sequence is “1, 0, 0”, and when the signal is determined using only the received power, the erroneous determination is “1, 1, 0”. Resulting in. However, when the determination is made using the first auxiliary power, it is determined as “1, 0, 0”, and when the determination is performed using the second auxiliary power, it is also determined as “1, 0, 0”. . Therefore, if these majority decisions are taken, the signal that finally determines reception is “1, 0, 0”, so that errors can be avoided.

    On the other hand, there may be a case where the received signal cannot be correctly reproduced. FIG. 14 is a diagram illustrating another example of the outputs of the reception power calculation unit 113 and the auxiliary power calculation unit 115 according to Embodiment 1 of the present invention. As shown in FIG. 14, for example, the reception signal is correctly reproduced when the determination is performed using only the reception power, but the reception is performed when the determination is performed using the first auxiliary power and the second auxiliary power. Both signals are erroneously determined, and the majority of these decisions may ultimately result in erroneous determination of the received signal.

As described above, taking a majority vote using a plurality of auxiliary powers is equivalent to performing noise smoothing. Therefore, as the type of auxiliary power according to the embodiment of the present invention is increased, the noise becomes a smaller value. It has the property of being smoothed. Therefore, as shown in FIG. 13, when the determination is made using only the received power, the received signal is reproduced erroneously, and the received signal is determined when the majority decision is made using both the received power and the auxiliary power. was the probabilities correctly Playable conditions as P _c, as shown in FIG. 14, the received signal is reproduced correctly when performing determination using only the received power, and, using both the received power and the auxiliary power when the conditional probability received signal is reproduced by mistake when performing majority decision and P _e, the relationship between the conditional probability P _c and the conditional probability P _e is as equation (10).

_{P c> P e ··· (10} )
An example of the result of proving this by numerical calculation is shown in FIG. In FIG. 15, the transmission code sequence bit length is set to 13, and the number of times the transmission code sequence is correctly received by the receiver 110 when the transmission code sequence is transmitted 100 times from the transmitter 100 is measured. Here, when the reception determination signal in the receiver 110 is equal to 12 bits or more out of 13 bits, it is considered that the signal has been correctly received.

  As shown in FIG. 15, it can be seen that as the type of auxiliary power is increased, the tolerance to noise increases (the probability of accurate reception increases). As an example, when the signal-to-noise power ratio (received CNR) of the received signal is 1 dB, when the determination is made using only the received power, the received signal can be accurately reproduced only 8 times out of 100 times. When the majority decision is performed using all of the power and the six types of auxiliary power, 60 out of 100 times are correctly reproduced, and the probability that the signal can be accurately reproduced even in a transmission / reception environment with high noise power increases. There is an effect.

  From the above, it is possible to accurately reproduce a signal even in a transmission path environment with a poor communication state. In addition, since each of the received power calculation unit 113 and the auxiliary power calculation unit 115 according to the embodiment of the present invention may have the same configuration except that the input / output signals are different, the circuit can be shared. Therefore, the reception performance is improved only by adding the first converted signal calculation unit 114, the auxiliary power calculation unit 115, and the first signal reproduction unit 116 to the conventional method of reproducing the reception signal using only the reception power. can do. In addition, since the first converted signal calculation unit 114 includes a signal conversion unit such as a memory and an adder / subtractor circuit that changes the time of the first received signal and the second received signal, the circuit scale is almost larger than the conventional method. There is an effect that the reception performance can be improved without doing so.

<Embodiment 2>
FIG. 2 is a block diagram of a transmission / reception system according to Embodiment 2 of the present invention. The second embodiment is characterized in that a second converted signal calculation unit 201 and a second signal reproduction unit 202 are provided. Since other configurations and operations are the same as those in the first embodiment, the description thereof is omitted here. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals.

  In the second signal regeneration unit 202, a received signal is determined using part or all of the received power P (t) and the auxiliary power A (t), and the reception determination signal G (t) that is the determination result and the error are determined. A signal E (t) is output. That is, a reception decision signal that determines the first reception signal and the second reception signal is calculated and output from the reception power and the auxiliary power, and an error is calculated from the reception determination signal and the auxiliary power and output as an error signal. It is characterized by.

FIG. 16 is a block diagram of the second signal reproduction unit 202 according to the second embodiment of the present invention. As illustrated in FIG. 16, the second signal reproduction unit 202 according to the second embodiment includes a power determination unit 1201 that outputs a comparison result between the received power P (t) and the predetermined value 1203 for determination, and auxiliary power (A _1). (T) to A _m (t)) and auxiliary power determination unit 1202 (first auxiliary) that outputs a comparison result between auxiliary predetermined value for determination 1204 (first auxiliary auxiliary value for determination to auxiliary predetermined value for mth determination). Power determination unit to m-th auxiliary power determination unit), and the reception determination signal G (t) is determined and output from the comparison result by the power determination unit 1201 and the comparison result by the auxiliary power determination unit 1202, and the auxiliary power determination unit A second power signal determination unit 1601 that outputs an error between the output of 1202 and the reception determination signal G (t) as an error signal E (t). In addition, since it is the same as that of Embodiment 1 (FIG. 12) except the 2nd electric power signal determination part 1601, description is abbreviate | omitted here.

  Second power signal determination section 1601 takes a majority decision using part or all of the output of power determination section 1201 and the output of auxiliary power determination section 1202 and outputs reception determination signal G (t). As an example, when n = 6, if the output of the power determination unit 1201 and the output of the auxiliary power determination unit 1202 are 1, 1, 1, 1, 0, 1, 0 in order, the majority decision is taken. Thus, the reception determination signal G (t) can be determined as G (t) = 1.

  The second power signal determination unit 1601 calculates and outputs the reception determination signal G (t), and determines the Hamming distance between the output of the auxiliary power determination unit 1202 and the reception determination signal G (t) as an auxiliary power error signal. Can be output as As shown in FIG. 16, m types of auxiliary power error signals are collectively expressed as an error signal E (t). The value of the error signal E (t) increases as the Hamming distance increases.

The second converted signal calculation unit 201 outputs a signal calculated based on the first received signal J ₁ (t) and the second received signal J ₂ (t). That is, the first auxiliary signal is calculated based on the first received signal and the first transition received signal obtained by shifting the first received signal for a predetermined time, and the second received signal and the second received signal are shifted for a predetermined time. The second auxiliary signal is calculated based on the second transition reception signal, and the outputs of the first auxiliary signal and the second auxiliary signal are selected based on the error signal.

  FIG. 17 is a block diagram showing an example of the second converted signal calculation unit 201 according to Embodiment 2 of the present invention. In FIG. 17, the configurations and operations of the first transition circuit 701 and the signal conversion unit 702 are the same as those in the first embodiment (FIG. 7), and thus description thereof is omitted here.

As shown in FIG. 17, the signal output from the signal conversion unit 702 is input to the optimization unit 1701. The optimization unit 1701 includes m types of optimization units (first optimization unit to m-th optimization unit), and each optimization unit receives the signal input from the signal conversion unit 702 and the error signal E (t). The signal is optimized to output the first auxiliary signal M ₁ (t) and the second auxiliary signal M ₂ (t).

  The first optimization unit to the m-th optimization unit can have the same configuration except that the signal input to each optimization unit and the signal output from each optimization unit are different. The operation of the optimization unit 1701m will be described.

In the m-th optimization unit 1701m, the signal output from the m-th signal conversion unit 702m is input as it is. The m-th optimization unit 1701m has an error tolerance, and the error signal E _m (t) input to the m-th optimization unit 1701m is equal to or less than the error tolerance (within the error tolerance). The signal M _1m (t) constituting the first auxiliary signal M ₁ (t) and the signal M _2m (t) constituting the second auxiliary signal M ₂ (t) are output.

On the other hand, if the error signal E _m (t) is larger than the allowable error value (outside the range of the allowable error value), temporarily or permanently stop the output of the signal M _{1 m} (t) and the signal M _2m (t) can do.

Note that the comparison between the error signal E _m (t) and the error tolerance is not limited to the method described above. For example, a value obtained by averaging the error signal E _m (t) in a predetermined time interval may be compared with an error tolerance, and the maximum value of the error signal E _m (t) and the error tolerance in a predetermined time interval may be compared. May be compared. In addition, it has a forward protection function that holds the value of error signal E _m (t) received during a predetermined time interval and the number of times, and determines the value of E _m (t) when the predetermined number of times is reached. You may do it.

  In the first embodiment, the amplitude difference between the received power and auxiliary power mark signals and the space signal changes in accordance with the transition time value of the first transition circuit 701 in the first conversion signal calculation unit 114. For example, consider a case where the sine wave C (t) and the sine wave S (t) are the expressions (11) and (12), respectively.

C (t) = cos (2πf _c t) (11)
S (t) = sin (2πf _c t) (12)
At this time, the amplitude of the mark signal in the received power in an ideal communication state without noise is 1, and the amplitude of the space signal is 0. On the other hand, in the auxiliary power, for example, when the transition time is 1 / (4f _c ), the amplitude of the mark signal is 1 and the amplitude of the space signal is 0. For example, the transition time in the first transition circuit 701 is 1 / In the case of (12f _c ), the amplitude of the mark signal is ½ and the amplitude of the space signal is zero. Further, when the transition time in the first transition circuit 701 is 1 / (2f _c ), both the amplitude of the mark signal and the signal of the space amplitude become 0, and the received signal cannot be reproduced accurately. As described above, when the amplitude difference between the mark signal and the space signal is small, it is obvious that the probability of erroneous determination is increased when the auxiliary power determination unit 1202 compares the predetermined auxiliary value 1204 (threshold) for determination. is there.

On the other hand, in the second embodiment, the above problem can be solved. For example, it is assumed that the transition time t _m of the m-th time transition circuit in the second conversion signal calculation unit is a transition time such that the amplitude difference between the mark signal and the space signal in the auxiliary power is very small. At this time, since the signal A _m (t) output from the auxiliary power calculation unit 115 is a signal including many determination errors, the Hamming distance from the reception determination signal G (t) increases. Accordingly, since the error signal E _m (t) also becomes large, the error signal E _m (t) exceeds the error tolerance in the m-th optimization unit 1701m, and the m-th optimization unit 1701m receives the signal M _1m (t) and the signal The output of M _2m (t) can be temporarily or permanently stopped.

  From the above, in addition to the effects of the first embodiment, the second converted signal calculation unit 210 can automatically detect and remove auxiliary power signals with poor quality (exceeding the error tolerance). There is an effect that the accuracy of the majority decision in the second power signal determination unit of the two-signal reproduction unit 202 can be further improved.

<Embodiment 3>
FIG. 3 is a block diagram of a transmission / reception system according to Embodiment 3 of the present invention. The third embodiment is characterized in that a third conversion signal calculation unit 301 and a third signal reproduction unit 302 are provided. Since other configurations and operations are the same as those in the first and second embodiments, the description thereof is omitted here. In the third embodiment, the same components as those in the first and second embodiments are denoted by the same reference numerals.

The third converted signal calculation unit 301 generates a signal calculated based on the first received signal J ₁ (t) and the second received signal J ₂ (t), and the first to m-th time transition signals. The first transition time value F ₁ (t) to the m-th transition time value F _m (t) used for this purpose are output. That is, the first auxiliary signal is calculated and output based on the first received signal and the first transition received signal obtained by shifting the first received signal for a predetermined time, and the second received signal and the second received signal are predetermined. A second auxiliary signal is calculated and output based on the second transition reception signal that has been shifted in time, and a predetermined time transition used for generating the first transition reception signal and the second transition reception signal is used as a transition time value. It is characterized by output. However, in FIG. 3, the first transition time value F ₁ (t) to the m-th transition time value F _m (t) are collectively expressed as a transition time value F (t).

  FIG. 18 is a block diagram showing an example of the third converted signal calculation unit 301 according to Embodiment 3 of the present invention. In FIG. 18, the configuration and operation of the signal conversion unit 702 are the same as those in the first and second embodiments, and thus description thereof is omitted here.

  As shown in FIG. 18, in the m kinds of time transition control circuits (first time transition control circuit to mth time transition control circuit) constituting the second transition control circuit 1801, signals input to the respective time transition control circuits. Since the same configuration can be adopted except that the signals output from the respective time transition control circuits are different, the operation of the m-th time transition control circuit 1801m will be described as an example.

In the m-th time transition control circuit 1801m, the signal J ₁ (t−t _m ) or J ₂ (t) in which the first reception signal J ₁ (t) or the second reception signal J ₂ (t) is shifted by the time t _m. -T _m ) is output to the m-th signal converter 702m. Here, t _m is a real number other than 0. Further, in the m-th time transition control circuit 1801m, the time t _m during which the first reception signal J ₁ (t) or the second reception signal J ₂ (t) is transitioned is the first time constituting the transition time value F (t). It outputs as m transition time value _Fm (t).

  The third signal regeneration unit 302 determines the received signal using the transition time value F (t) and a part or all of the received power P (t) and the auxiliary power A (t). A certain reception determination signal G (t) is output.

FIG. 19 is a block diagram of the third signal reproducing unit 302 according to Embodiment 3 of the present invention. As illustrated in FIG. 19, the third signal reproducing unit 302 according to the third embodiment includes a power determination unit 1201 that outputs a comparison result between the received power P (t) and a predetermined value 1203 for determination, and a transition time value (F A threshold selection unit 1901 (first power threshold selection unit to mth power threshold selection unit) that selects and outputs a predetermined auxiliary auxiliary value for determination based on ₁ (t) to F _m (t)), and auxiliary power (A ₁ (t) to A _m (t)) and an auxiliary power determination unit 1202 (first auxiliary power determination unit to m-th auxiliary power determination unit) that outputs a comparison result between the predetermined auxiliary value for determination, and an electric power determination unit 1201 And a first power signal determination unit 1205 that determines and outputs a reception determination signal G (t) from the comparison result by the auxiliary power determination unit 1202. Since the configuration other than the threshold selection unit 1901 is the same as that of the first embodiment (FIG. 12), description thereof is omitted here.

The threshold selection unit 1901 includes m types of threshold selection units (a first power threshold selection unit to an nth power threshold selection unit), and each threshold selection unit has the same configuration except that input / output signals are different. be able to. The m-th power threshold selection unit 1901m can calculate or select the m-th determination auxiliary predetermined value based on the transition time value F _m (t).

  According to the third embodiment, the threshold selection unit 1901 can automatically generate a determination threshold value (determination method auxiliary predetermined value) used for determination of a mark signal and a space signal necessary for generating auxiliary power.

For example, consider a case where the transition time is t ₁ and the sine wave C (t) and the sine wave S (t) are expressed by the equations (11) and (12), respectively. At this time, the amplitude of the mark signal in the auxiliary power signal is expressed by Expression (13).

4 × sin ² (2πf _c t ₁ ) (13)
The value (amplitude value) calculated by the equation (13) is uniquely determined if you know the frequency f _c of the transition time t ₁ and the sine wave C (t) and a sine wave S (t). Therefore, for example, an intermediate value between the amplitudes of the mark signal and the space signal may be set as the determination threshold value, and when the space signal is 0, a half value of the equation (13) may be set as the auxiliary auxiliary value for determination.

From the above, for example, when the transition time value t _m of the m time transition control circuit 1801m is changed arbitrarily in accordance with the time, the judgment auxiliary predetermined value in accordance with a change in transition time values t _m automatically Therefore, the probability of accurately determining the received signal is improved as compared with the case where the fixed auxiliary auxiliary value for determination is used in the first and second embodiments.

  In the embodiment of the present invention, an applicable aspect of the present invention is illustrated, and the present invention is not limited to this.

DESCRIPTION OF SYMBOLS 100 Transmitter, 101 Sine wave generation part, 102 Signal insertion part, 103 Transmission control part, 104 Transmission antenna, 110 Receiver, 111 Reception antenna, 112 Reception control part, 113 Reception power calculation part, 114 1st conversion signal calculation part 115 Auxiliary power calculation unit 116.
First signal reproduction unit, 117 signal control unit, 201 second conversion signal calculation unit, 202 second signal reproduction unit, 301 third conversion signal calculation unit, 302 third signal reproduction unit, 401 time switch, 601 first power calculation 602, second power calculation unit, 603 first addition unit, 701 first transition circuit, 702 signal conversion unit, 702m m signal conversion unit, 801 differentiation unit, 801m m differentiation unit, 901 first adder / subtractor, 902 Second adder / subtracter, 1001 signal auxiliary unit, 1001m mth signal auxiliary unit, 1101 3rd power arithmetic unit, 1102 fourth power arithmetic unit, 1103 second adder, 1201 power determination unit, 1202 auxiliary power determination unit, 1202m first m auxiliary power determining unit, 1203 predetermined value for determination, 1204 auxiliary predetermined value for determination, 1204m auxiliary predetermined value for m determination, 1205 first power signal determination 1601, second power signal determination unit, 1701 optimization unit, 1701m m-th optimization unit, 1801 second transition control circuit, 1801m m-th time transition control circuit, 1901 threshold selection unit, 1901m m-th threshold selection unit.

Claims (11)

A transmission / reception system that performs communication between a transmitter and a receiver,
The transmitter is
A sine wave generator for generating a first sine wave and a second sine wave;
The transmission signal is distributed to two systems, the first sine wave is inserted into one system signal and the first original signal is output, and the second sine wave is inserted into the other system signal and the second original signal is inserted. A signal insertion unit for outputting a signal;
With
The receiver
A received power calculating unit that calculates received power from the first received signal obtained by receiving the first original signal and the second received signal obtained by receiving the second original signal; and
A first auxiliary signal is calculated based on the first received signal and a first transition received signal obtained by shifting the first received signal for a predetermined time, and the second received signal and the second received signal are shifted for a predetermined time. A first converted signal calculating unit that calculates and outputs a second auxiliary signal based on the second transition received signal;
An auxiliary power calculator that calculates and outputs auxiliary power from the first auxiliary signal and the second auxiliary signal;
A first signal regeneration unit that calculates and outputs a reception determination signal for determining the first reception signal and the second reception signal from the reception power and the auxiliary power;
A signal control unit for controlling and outputting the first reception signal and the second reception signal based on the reception determination signal;
A transmission / reception system comprising: A sine wave generator for generating a first sine wave and a second sine wave;
The transmission signal is distributed to two systems, the first sine wave is inserted into one system signal and the first original signal is output, and the second sine wave is inserted into the other system signal and the second original signal is inserted. A signal insertion unit for outputting a signal;
With
The sine wave generator outputs the first sine wave and the second sine wave orthogonal to each other,
The signal insertion unit inserts the first sine wave into a signal of the one system so that the first sine wave has a predetermined time length every predetermined time, and the second sine wave has a predetermined time length every predetermined time. A transmitter, wherein the transmitter is inserted into the signal of the other system. A received power calculating unit that calculates received power from the first received signal and the second received signal and outputs the received power;
A first auxiliary signal is calculated based on the first received signal and a first transition received signal obtained by shifting the first received signal for a predetermined time, and the second received signal and the second received signal are shifted for a predetermined time. A first converted signal calculating unit that calculates and outputs a second auxiliary signal based on the second transition received signal;
An auxiliary power calculator that calculates and outputs auxiliary power from the first auxiliary signal and the second auxiliary signal;
A first signal regeneration unit that calculates and outputs a reception determination signal for determining the first reception signal and the second reception signal from the reception power and the auxiliary power;
A signal control unit for controlling and outputting the first reception signal and the second reception signal based on the reception determination signal;
A receiver. In place of the first converted signal calculation unit,
A first auxiliary signal is calculated based on the first received signal and a first transition received signal obtained by shifting the first received signal for a predetermined time, and the second received signal and the second received signal are shifted for a predetermined time. A second converted signal calculating unit that calculates a second auxiliary signal based on the second transition received signal and selects an output of the first auxiliary signal and the second auxiliary signal based on an error signal;
In place of the first signal reproduction unit,
The reception decision signal for determining the first reception signal and the second reception signal is calculated and output from the reception power and the auxiliary power, and an error is calculated from the reception decision signal and the auxiliary power. A second signal reproducing unit for outputting as a signal;
The receiver according to claim 3, comprising: In place of the first converted signal calculation unit,
A first auxiliary signal is calculated and output based on the first received signal and a first transition received signal obtained by shifting the first received signal for a predetermined time, and the second received signal and the second received signal are determined in advance. The second auxiliary signal is calculated and output based on the second transition reception signal that has been shifted in time, and the predetermined time transition used to generate the first transition reception signal and the second transition reception signal is shifted. A third conversion signal calculation unit for outputting as a time value;
In place of the first signal reproduction unit,
A third signal regeneration unit that calculates and outputs the reception determination signal from the reception power, the auxiliary power, and the transition time value;
The receiver according to claim 3, comprising: The first converted signal calculation unit includes:
A transition circuit for outputting the first transition reception signal and the second transition reception signal;
A first auxiliary signal calculator for calculating the first auxiliary signal from the first received signal and the first transition received signal;
A second auxiliary signal calculating unit for calculating the second auxiliary signal from the second received signal and the second transition received signal;
A signal converter comprising:
The receiver according to claim 3, comprising: The second converted signal calculation unit includes:
A transition circuit for outputting the first transition reception signal and the second transition reception signal;
A first auxiliary signal calculator for calculating the first auxiliary signal from the first received signal and the first transition received signal;
A second auxiliary signal calculating unit for calculating the second auxiliary signal from the second received signal and the second transition received signal;
A signal converter comprising:
An optimization unit that selects outputs of the first auxiliary signal and the second auxiliary signal based on the error signal;
The receiver according to claim 4, comprising: The third converted signal calculator is
A transition control circuit that outputs the first transition reception signal and the second transition reception signal and outputs the transition time value;
A first auxiliary signal calculator for calculating the first auxiliary signal from the first received signal and the first transition received signal;
A second auxiliary signal calculating unit for calculating the second auxiliary signal from the second received signal and the second transition received signal;
A signal converter comprising:
The receiver according to claim 5, comprising: The first signal reproduction unit includes:
A power determination unit that outputs a comparison result between the received power and a predetermined value for determination;
An auxiliary power determination unit that outputs a comparison result between the auxiliary power and a predetermined auxiliary value for determination;
A first power signal determination unit that determines and outputs the reception determination signal from a comparison result by the power determination unit and a comparison result by the auxiliary power determination unit;
The receiver according to claim 3, comprising: The second signal reproduction unit includes:
A power determination unit that outputs a comparison result between the received power and a predetermined value for determination;
An auxiliary power determination unit that outputs a comparison result between the auxiliary power and a predetermined auxiliary value for determination;
The reception determination signal is determined and output from the comparison result by the power determination unit and the comparison result by the auxiliary power determination unit, and an error between the output of the auxiliary power determination unit and the reception determination signal is used as the error signal. A second power signal determining unit to output;
The receiver according to claim 4, comprising: The third signal reproduction unit includes:
A power determination unit that outputs a comparison result between the received power and a predetermined value for determination;
A threshold selection unit that selects and outputs the auxiliary predetermined value for determination based on the transition time value;
An auxiliary power determination unit that outputs a comparison result between the auxiliary power and the auxiliary predetermined value for determination;
A first power signal determination unit that determines and outputs the reception determination signal from a comparison result by the power determination unit and a comparison result by the auxiliary power determination unit;
The receiver according to claim 5, comprising:

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