JP2000269832A - Radio transmission device, radio reception device and radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio transmission device which is miniaturized and lightened in weight, whose power is saved and which is made to be inexpensive by frequency- converting a plurality of input intermediate frequency signals into a plurality of signals of different transmission frequency bands and synthesizing the plurality of signals of the transmission frequency bands with one local oscillator. SOLUTION: A local oscillator 3 has two output terminals outputting the local oscillation signals of the same frequency, has a mechanism for relatively controlling amplitude and a phase between the signal output terminals and generates two local oscillation signals. An up converter 1 frequency-converts the signal into the signal of a lower band wave having the frequency of a difference between one local oscillation signal and one intermediate frequency signal. An up converter 2 frequency-converts the signal into the signal of an upper side-band wave having the frequency of a sum on the other local oscillation signal and the other intermediate frequency signal. A synthesizer 4 synthesizes output signals from the two up converters 1 and 2. Namely, the synthesizer 4 can execute control for synthesizing vectors having equal amplitude and opposite phases.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to frequency conversion of two different intermediate frequency signal inputs into two different transmission frequency band signals using two up-converters by using a local oscillation signal divided into two from one local oscillator. Then, a wireless transmission device that synthesizes and outputs the two signals, receives a reception signal equivalent to a transmission signal from the wireless transmission device, and divides two local oscillation signals into two by one local oscillator, respectively, into two different local oscillation signals. To the image rejection mixer,
The present invention relates to a wireless receiving device that performs heterodyne detection and demodulates into two different intermediate frequency signals, and a wireless communication system in which the wireless transmitting device is arranged on a transmitting side and the wireless receiving device is arranged on a receiving side.

[0002] In recent years, radio transmission devices that transmit a large amount of information at a time using transmission signals having many different transmission frequencies (multicarriers), radio reception devices that receive the radio signals, and radio communication systems that include them have been increasing. ing.

According to the present invention, when the frequency of a signal to be transmitted / received at a time increases, the wireless transmission apparatus and the wireless reception apparatus and their components are reduced in size, weight, power consumption, and cost so that they can be transmitted wirelessly. It is desired to realize a device, a wireless receiving device, and a wireless communication system.

[0004]

2. Description of the Related Art FIG. 7 is a block diagram of a conventional radio transmitting apparatus, and FIG. 8 is a block diagram of a conventional radio receiving apparatus.

[0005] In the block diagram of the prior art radio transmitting apparatus shown in FIG. 7, two intermediate frequency signals (1) and (2) are amplified by intermediate frequency amplifiers 31 and 41 and local oscillators 33 and 43.
The mixers 32 and 42 use the local oscillation signal from
Frequency conversion into two single sideband (SSB) signals of an upper sideband (USB) signal and a lower sideband (LSB) signal of the sum of the frequencies of the two input signals in the transmission frequency band. And the up-converter (1) 30 that selects either USB or LSB required for transmission by the band-pass filters 34 and 44 and amplifies the signal by the transmission amplifiers 35 and 45 and outputs the amplified signal. 2) 40
As a result, signals of two different transmission frequencies are obtained, and the band-pass filters 51 and 53 and the circulator
The two different signals are combined by a transmission combiner 50 composed of the components 2 and 54 and output to an antenna (not shown) as an output of the wireless transmission device.

[0008] In the block diagram of the prior art radio receiver shown in FIG. 8, a received signal is received from an antenna (not shown), and circulators 61 and 63 and a band-pass filter 6 are received.
The signal is demultiplexed into two reception signals whose frequency is separated by the reception demultiplexer 60 constituted by 2 and 64.

[0007] The signals obtained by the demultiplexing pass through receiving amplifiers 71 and 81, each of which can perform low noise amplification.
2, 82, and performs heterodyne detection with the local oscillation signals from the local oscillators 73 and 83 to convert the frequency into an intermediate frequency band signal.
Downconverter (1) 70 which amplifies the output to a required level by intermediate frequency amplifiers 75 and 85 and outputs the amplified signal to the required level
And a down converter (2) 8 having the same configuration as the down converter (1) 70 and outputting an intermediate frequency signal different from the above.
With 0, the signal was demodulated into two intermediate frequency signals.

In a conventional radio communication system, a radio transmission apparatus shown in FIG. 7 is arranged on a transmission side, and a radio reception apparatus shown in FIG. 8 is arranged on a reception side, thereby constructing a system for communicating between them.

[0009]

As the mixers 32 and 42 shown in the block diagram of the prior art radio transmission apparatus of FIG. 7, a mixer for converting the frequency using a non-linear element or a single balanced mixer is used. The SSB signal required for the output, as well as the SSB of the image
The signal was occurring at a level comparable to the required SSB signal level.

Generally, at the output of a radio transmitting apparatus, the level of an unnecessary wave with respect to a required signal is represented by a ratio (D / U) of an unnecessary wave level (U) to a required signal level (D) as spurious specifications. Stipulates that requirement.

In the configuration of the conventional radio transmitting apparatus, bandpass filters 34, 44, 51,
53 removes unnecessary waves.

When the transmission frequency of the radio transmission apparatus increases, an up-converter (an intermediate frequency amplifier 31, a local oscillator 33, a mixer 32, a band-pass filter 34, and a final-stage transmission amplifier 35), which is a conventional configuration, is used. 1) 3
Bandpass filter 5 after 0 and final stage transmission amplifier
1. The same configuration as that of one frequency of the transmission combiner 50 of the circulator 52 is added, the signals are further combined and transmitted, and the bandpass filters 34 and 51 having high selectivity are required. It was high, and the shape, size, weight, power consumption, and the like also increased in proportion.

Further, as shown in the block diagram of the prior art radio receiving apparatus shown in FIG. 8, the mixers 72 and 82 for heterodyne detection also use a mixer or a single balanced mixer for performing frequency conversion using a non-linear element. Therefore, in addition to the necessary heterodyne detection of the SSB signal, heterodyne detection by the SSB signal having a strong image occurs at the output thereof. To suppress the signal of the image SSB in advance, and heterodyne detection of the required SSB signal is performed.

When the reception frequency of the radio receiver increases, the down converter (1) of the prior art configuration is used.
70 and a circulator 61 of the reception duplexer 60 at the input stage;
The reception signal is further distributed by increasing the configuration of the bandpass filter 62 for one frequency.

Therefore, the radio receiving apparatus requires bandpass filters 62 and 64 having high selectivity.
As the receiving frequency increased, all components increased by one frequency, so that cost, shape, size, power consumption, etc. also increased in proportion.

An object of the present invention is to provide a radio transmitting apparatus, a radio receiving apparatus, and a radio communication system which solve the above-mentioned problems, and are reduced in size, weight, power consumption, and cost.

[0017]

The present invention will be described below with reference to the block diagram of the principle of the radio transmitting apparatus and the radio receiving apparatus shown in FIG.

The radio transmitting apparatus of the present invention inputs an input intermediate frequency signal and a local oscillation signal from a local oscillator to an up-converter, and obtains one transmission signal converted into a frequency of a transmission frequency band from an output thereof. In the same manner as described above, to obtain transmission signals of a plurality of different transmission frequency bands, in a wireless transmission device that combines and transmits these transmission signals, has two output terminals that output local oscillation signals of the same frequency, A local oscillator 3 having a mechanism for relatively adjusting the amplitude and phase between its signal output terminals to generate two local oscillation signals;
An up-converter 1 for converting the frequency of the local oscillation signal into a lower band signal having a frequency of a difference between the one local oscillation signal and the one intermediate frequency signal; and the other local oscillation signal and the other intermediate frequency signal. An up-converter 2 for frequency-converting an upper-band signal having a frequency equal to the sum of the signals and an synthesizer 4 for synthesizing output signals from the two up-converters 1 and 2 are provided.

By configuring the radio transmitting apparatus in this way, the two intermediate frequency signals can be frequency-converted into two signals of different transmitting frequency bands by one local oscillator. Since these two signals are combined by the combiner 4 into one transmission signal, only one transmission power amplifier for amplifying the power in the subsequent stage is required, and the transmission combiner 50 conventionally required in FIG. 7 becomes unnecessary.

Further, due to the configuration of the radio transmitting apparatus 10, the local oscillation signal enters the combiner 4 through the separate SSB upconverters 1 and 2, and the combiner 4 combines the signals with equal amplitudes and opposite phases. Can be adjusted,
The leakage of the local oscillation signal can be offset.

The radio receiving apparatus 20 of the present invention has a distributor 24 for dividing a received signal into two parts and distributing the signals to different image rejection mixers, and two output terminals for outputting local oscillation signals of the same frequency. A local oscillator 23 that generates a local oscillation signal, and one received signal from the output of the distributor 24 and the one local oscillation signal.
An image rejection mixer 2 for heterodyne detection of a lower sideband signal included in a received signal into an intermediate frequency signal
1, heterodyne detection of a signal in the upper sideband included in a received signal into an intermediate frequency signal different from the above by the received signal from the other one of the outputs of the distributor 24 and the other local oscillation signal. And a rejection mixer 22.

By configuring the radio receiving apparatus 20 in this manner, an input received signal can be
The two intermediate frequency signals can be supplied to two different image rejection mixers 21 and 22 for demodulating the two intermediate frequency signals.

The image rejection mixer 2
By using 1, 22, the image signal of the sideband included in the received signal is suppressed in principle, so that a high-performance bandpass filter which is required before heterodyne detection, which is conventionally required, is not required. Or reduced performance.

Further, in the radio communication system of the present invention, the radio transmitting apparatus 10 of the present invention is arranged on the transmitting side, and the radio receiving apparatus 20 of the present invention is arranged on the receiving side.

By adopting such a wireless communication system of the present invention, it is possible to provide a system that is smaller, lighter, consumes less power, and is less costly than before.

[0026]

Embodiments of the present invention will be described below.

FIG. 2 shows the spectrum and frequency relationship of the signal of the present invention.

The vertical axis of FIG. 2 is the spectrum intensity, the horizontal axis is the frequency, and the frequency axis of each signal is in the same frequency range.

FIG. 2A shows an intermediate frequency signal spectrum which is an input signal of the radio transmitting apparatus, FIG. 2B shows a local oscillation signal spectrum, FIG. 2C shows an SSB up-converter output signal spectrum (LSB), and FIG. Is the SSB upconverter output signal spectrum (USB), (e) is the transmission signal spectrum (LSB / USB), and (f) is the intermediate frequency signal spectrum after reception heterodyne detection.

Here, the solid line of the spectrum in FIG. 2 shows the ideal frequency spectrum of each signal, and the dotted line shows the signal leakage in the image sideband and the leakage of the local oscillation signal, which are very small but unnecessary waves. Represents.

The SSB up-converters 1 and 2 of the radio transmitting apparatus of the present invention shown in FIGS. 1, 4 and 5 are provided with a frequency sum (USB) or a frequency difference (LS) between the local oscillation signal and the intermediate frequency signal.
B) outputs only one of the single sideband (SSB) signals.

FIG. 3 shows an example of a circuit configuration and a frequency spectrum of the SSB upconverter, and the operation thereof will be described below.

The SSB upconverters 1 and 2 shown in FIG.
Has two inputs, an intermediate frequency signal input and a local oscillation signal. The input intermediate frequency signal is divided into two by a 3 dB 90-degree hybrid of the divider 1-1 on the internal input side,
The two balanced mixers 1-2 and 1-3 are input to the intermediate frequency signal input terminals, respectively. On the other hand, the local oscillation signal is also divided into two by the 3 dB 90-degree hybrid of the internal distributor 1-4. Balanced mixers 1-2, 1-3
To the local oscillation signal terminals.

The outputs of the two internal balanced mixers 1-2 and 1-3 to which the intermediate frequency signal and the local oscillation signal have been input have frequencies of the upper sideband (USB) and the lower sideband (LSB). The converted signals appear with the same intensity, and these signals are vector-wise synthesized by the synthesizer 1-5 on the output side.

The output of the internal combiner 1-5, which is the output of the SSB upconverters 1, 2, is composed of the outputs of the two balanced mixers 1-2, 1-3, and the LSB ( Or USB) signals are canceled out in a vector because they have the same amplitude in opposite phases. At the same time, USB (or LSB) signals required for output are added in a vector in the same phase and output, and no image signal is output. Things.

It should be noted that the selection of the signal of the upper side band (USB) or the lower side band (LSB) of the output of the SSB up converters 1 and 2 is performed by switching the input side divider 1 in advance to input the intermediate frequency signal. By switching the input positions to the two input terminals of the 3 dB 90-degree hybrid, which is -1, the output signal can be selectively switched.

FIG. 4 shows a first embodiment of the radio transmitting apparatus according to the present invention.
This will be described below.

The oscillator 3-1 shown in FIG. 4 is a local oscillation source necessary for raising the intermediate frequency signal to the transmission frequency band, and a 3 dB 90-degree hybrid coupler or Wilkinson type (Y type) connected to its output side. The signal is divided into two by a divider circuit 3-4, one of which is supplied to the SSB up-converter 1 via the variable attenuator 3-2, and the other is supplied to the SSB up-converter 3-3 via the variable phase shifter 3-3.
The signals are supplied to the B up converter 2 as local oscillation signals.

The input of the intermediate frequency signal (1) shown in FIG. 4 is amplified to a required level by the intermediate frequency amplifier 6, input to the SSB up-converter 1, and passed to the local attenuator 3-2. To convert the frequency into a signal in the lower sideband, and obtain an LSB signal at the output. The other input of the intermediate frequency signal (2) is amplified to a required level by an intermediate frequency amplifier 7 and put into the SSB up-converter 2, where the local oscillation signal passed through the variable phase shifter 3-3 causes an upper side wave to be input. The frequency is converted to a band signal, and a USB signal is obtained at the output.

LSB from upconverter 1 and 2 outputs
And the USB signal are vector-wise synthesized by the synthesizer 4 and input to the transmission amplifier 5.

The circuit of the combiner 4 is the same as that of the divider that distributes two signals, and can be combined when input is reversed. For example, a 3 dB 90-degree hybrid coupler or a Wilkinson type (Y type) in-phase It is a combining circuit (not shown).

In the synthesizer 4, the SSB up converter 1
From LSB and USB from SSB upconverter 2
In addition to the two output signals, there are leakage of the canceled image signal and leakage of the local oscillation signal, which are also combined and output.

The local oscillation signal from the oscillator 3 to the synthesizer 4 shown in FIGS. 4 and 5 passes through the path through the variable phase shifter 4 and the SSB upconverter 1 and the variable attenuator 3-2 and the SSB upconverter 2. The variable phase shifter of the local oscillator 3 is configured such that the synthesizer 4 cancels the local oscillation signals from the two paths with almost the same amplitude and opposite phases and synthesizes them. 3-3 and variable attenuator 3-2.

Therefore, at the output of the combiner 4, the leakage of the SSB signal of the image and the local oscillation signal are sufficiently canceled out so as to be negligible, and the US required by the radio transmitting apparatus for the output.
A signal is formed by combining the signal of B and the signal of LSB, and can be input to the transmission amplifier 5.

In the transmission amplifier 5, the two USB and L
The SB signal is amplified to a required transmission power and transmitted to the antenna side (not shown) as an output of the wireless transmission device 10.

In the configuration of the first embodiment of the radio transmission apparatus of the present invention shown in FIG. 4, since no filter is used, the frequency of the intermediate frequency signals (1) and (2) changes and the local oscillator 3 Even if the signal frequency is changed, a wideband operation can be performed in which the leakage of the image signal and the leakage of the local oscillation signal are canceled by the above-described principle.

The SSB upconverters 1 and 2 shown in FIG.
Does not output only the necessary ideal LSB and USB signals, but also reduces the leakage of the unnecessary wave image signal at the frequency position indicated by the dotted line in the frequency spectrum of the up-converter output in FIGS. Although the leakage of the local oscillation signal is very small, it is output together with the necessary signal.

In the apparatus constructed according to the first embodiment of the radio transmission apparatus of the present invention shown in FIG. 4, if the unnecessary wave (spurious) suppression performance required for the apparatus is insufficient, leakage of an image signal or a local oscillation signal may occur. However, even if it is very slight, it becomes a problem, and it is required that the unnecessary signal level be smaller than the USB or LSB signal level required for transmission.

For this reason, FIG. 5 shows an embodiment in which a filter is provided at a place where further suppression of unnecessary waves is required in the configuration of FIG.

FIG. 5 shows a second embodiment of the radio transmitting apparatus according to the present invention.
It is.

The configuration shown in FIG. 5 is different from the configuration of the radio transmission apparatus shown in FIG. 4 in that the output of the SSB up-converters 1 and 2 further eliminates the leakage of the local oscillation signal and the leakage of the image signal to further remove unnecessary waves. Two bandpass filters 8 and 9 are added, and further, a band elimination filter 11 that removes local oscillation signal leakage behind the combiner 4 is added to remove unnecessary waves.

It should be noted that, depending on the unnecessary wave request of the radio transmitting apparatus, there is a case where any one of the band-pass filters 8 and 9 and the band elimination filter 11 is not required.

Further, in order to obtain more transmission frequencies (multicarriers), a plurality of configurations of the present invention may be provided, and their signal outputs may be combined at the input side of the transmission amplifier 5 and transmitted.

The internal configuration of the local oscillator 3 is not limited to those shown in FIGS. 4 and 5, but may be any as long as it has a function of relatively adjusting the amplitude and phase between the two output terminals. The variable attenuator 3-2 and the variable phase shifter 3 shown in FIG.
3 may be placed on either output terminal side, or the coupling ratio of the distributor 3-4 may be changed to provide a variable attenuator 3-2 and a variable phase shifter 3-3 on the output end side of strong coupling. And a vector adjuster having two functions of a variable attenuator 3-2 and a variable phase shifter 3-3 may be inserted. 2 and two variable phase shifters 3-3.

FIG. 6 shows an embodiment of the radio receiving apparatus according to the present invention.

The radio receiving apparatus of the present invention shown in FIG. 6 inputs a received signal equivalent to the transmission signal generated by the radio transmitting apparatus of the present invention and performs heterodyne detection. The operation is basically the same as that of the present invention. This is a frequency conversion operation that is the reverse of that of the wireless transmission device.

The input received signal shown in FIG. 6 is put into one receiving amplifier 25 to perform low-noise amplification, sufficiently amplified to a required level, input to the distributor 24, and output into two-divided signals. . The divided signals are input to two image rejection mixers 21 and 22 capable of heterodyne detection of signals in mutually different sidebands. And performs preprocessing for suppressing the image signal, which is a signal of the image rejection, and inputs the image signals to the image rejection mixers 21 and 22.

Image rejection mixers 21 and 22
In advance, the circuit is set so as to heterodyne-detect each of the received signals in different sidebands from among the sidebands in the received signal, and the unnecessary image signal is subjected to the bandpass filter 26, By inputting the signal subjected to the suppression processing at 27 and the local oscillation signal divided into two by the distributor 23-4 from the oscillator 23-1 to the image rejection mixers 21 and 22, respectively, the image rejection mixer 21 The image rejection mixer 22 can demodulate the intermediate frequency signal (1) from the waveband signal to the intermediate frequency signal (2), respectively.

The band-pass filters 26 and 27 shown in FIG.
The image rejection mixers 21 and 22 have, in addition to the fundamental image signal suppression function originally provided thereto, a function of blocking and attenuating by the band-pass filters 26 and 27, and further remove the image signal of the received signal. is there.

Although not shown, the configuration of the image rejection mixers 21 and 22 used in the configuration of FIG. 6 is basically the same as the circuit configuration of the SSB upconverter shown in FIG. 3, and the input / output terminals of FIG. In which the upper sideband or the lower sideband of the input signal for heterodyne detection can be determined in advance by selecting the signal input terminal of the internal input 3 dB hybrid coupler. .

As described above, the wireless receiving apparatus according to the present invention also uses the US signal like the signal received from the wireless transmitting apparatus according to the present invention.
It can be seen that only one receiving amplifier 25 and one local oscillator 23 need to be provided for heterodyne detection of a signal having two frequencies of B and LSB.

[0062]

As described above, the local oscillator and the transmission amplifier are integrated into one to obtain two transmission frequencies by the radio transmission apparatus of the present invention.

Further, the USB (or L
Since the SSB up-converters 1 and 2 that output SB) are employed, expensive band-pass filters 34, 44, 51, and 53 having high selectivity are not required, and ordinary filters that do not require or have high performance are not required. Can be used.

Further, since the output of the radio transmission device is used as a transmission amplifier, the loss in the transmission combiner 50 at the last stage can be eliminated or reduced, and the power efficiency can be improved.

Further, according to the radio receiving apparatus of the present invention, a local oscillator and a receiving amplifier capable of low-noise amplification are obtained as one in order to obtain two received signals.

The USB and L required in the received signal
The use of the image rejection mixers 21 and 22 for heterodyne detection of the SB and the SB separately eliminates the need for an expensive image rejection filter having high selectivity, and the use of a normal filter that does not require or has a high performance. Becomes possible.

Further, since a receiving amplifier capable of amplifying low noise can be immediately connected to the receiving antenna side, the loss of the receiving duplexer 60 conventionally input to the radio receiving apparatus can be eliminated or reduced. , The received noise figure can be improved.

Therefore, according to the present invention, it is possible to use a transmission amplifier and a reception amplifier, and a local oscillator which can be shared by two waves for transmission and reception, and eliminate or eliminate a filter used for a radio transmission device and a radio reception device. In addition, since the coupling loss between the amplifier side and the antenna side for transmission and reception can be reduced, it is possible to provide a wireless transmitter, a wireless receiver, and a wireless communication system that can be reduced in size, weight, and cost. .

[Brief description of the drawings]

FIG. 1 is a block diagram showing the principle of a wireless transmission device and a wireless reception device according to the present invention;

FIG. 2 shows the relationship between the spectrum and the frequency of the signal of the present invention.

FIG. 3 is a circuit configuration example and a frequency spectrum of an SSB upconverter.

FIG. 4 is a first embodiment of a wireless transmission device according to the present invention.

FIG. 5 is a second embodiment of the wireless transmission device of the present invention.

FIG. 6 shows an embodiment of a wireless receiving apparatus according to the present invention.

FIG. 7 is a block diagram of a conventional wireless transmission device.

FIG. 8 is a block diagram of a conventional radio receiving apparatus.

[Explanation of symbols]

1, 2 SSB upconverter 1-1, 1-4 3dB 90 degree hybrid coupler 1-2, 1-3 Single balanced mixer 1-5, 3-4, 4, 23-4, 24, synthesizer (or distributor) ) 3-2 Variable attenuator 3, 23, 33, 43, 73, 83 Local oscillator 3-1, 23-1 Oscillator 3-3 Variable phase shifter 32, 42, 72, 82 Mixer 6, 7, 31, 41 , 75, 85 Intermediate frequency amplifiers 5, 35, 45 Transmission amplifiers 8, 9, 26, 27, 34, 44 Band pass filters 11 Band elimination filters 21, 22 Image rejection mixers 25, 71, 81 Reception amplifiers 52, 54 , 61, 63 Circulator 55, 65 Terminating resistor 51, 53, 62, 64 Band pass filter for demultiplexing 74, 84 Intermediate frequency band pass filter 10 Radio transmitter 20 Radio receiver 30 Upconverter (1) 40 Upconverter (2) 50 Transmit combiner 60 Receive duplexer 70 Downconverter (1) 80 Downconverter (2)

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Claims (3)

[Claims] 1. An input intermediate frequency signal and a local oscillation signal from a local oscillator are input to an up-converter, and a single transmission signal converted to a frequency in a transmission frequency band is obtained from an output thereof. A wireless transmission device that obtains transmission signals in a plurality of different transmission frequency bands, combines the transmission signals, and transmits the signals, has two output terminals for outputting a local oscillation signal of the same frequency, and operates between the signal output terminals. A local oscillator having a mechanism for relatively adjusting the amplitude and phase, and generating two local oscillation signals; and a lower band having a difference frequency between the one local oscillation signal and the one intermediate frequency signal. An up-converter for converting the frequency of the signal into a signal of an upper frequency band; And a combiner that combines output signals from the two upconverters. 2. A splitter for splitting a received signal into two parts and distributing the split signal to different image rejection mixers, and a local part having two output terminals for outputting a local oscillation signal having the same frequency and generating a local oscillation signal An oscillator, an image rejection mixer that heterodyne-detects a lower sideband signal included in the received signal into an intermediate frequency signal by one of the received signals from the output of the divider and the one local oscillation signal, An image rejection mixer that heterodyne-detects a signal in the upper sideband included in the received signal by the other local oscillation signal and a received signal from the other of the splitter outputs into an intermediate frequency signal different from the above. A wireless receiving device comprising: 3. A wireless communication system, wherein the wireless transmitting device according to claim 1 is arranged on a transmitting side, and the wireless receiving device according to claim 2 is arranged on a receiving side.