JP2001358605A - Radio communications equipment and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio communications equipment and a method for radio communicating, capable of being reduced in size by sharing a transmission mixer and a reception mixer. SOLUTION: Transmission and reception are alternatively communicated by a mixer 5 or balance mixers 50 and 51, and a frequency converter for an intermediate frequency and a radio frequency is shared on the transmission side and the reception side. The transmission side or the reception side is selected by switches 31 and 32, and circulators 41 and 42 or the like, and the transmission rot the reception in the radio frequency is selected. Thus, the transmission mixer and the reception mixer are shared so as to enable reduction in size.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication device and a wireless communication method for next-generation high-speed data wireless communication.

[0002]

2. Description of the Related Art Conventionally, as a radio communication device for next-generation high-speed data radio communication, for example, there is a TDD radio communication device.
In this type of wireless communication device, a conversion unit for converting an intermediate frequency to a radio frequency in a transmission system, or a conversion unit for converting a radio frequency to an intermediate frequency in a reception system has a mixer, and a local switch as a local drive of the mixer. Some are configured to have a drive amplifier.

As this type of wireless communication device, there is, for example, a device disclosed in Japanese Patent Application Laid-Open No. 9-219729 (wireless modulation / demodulation circuit). In this device, a quadrature demodulator and a quadrature modulator in a transmission / reception device applied to a wireless terminal used in a so-called TDD wireless communication device are shared to reduce the number of circuit components. is there.

[0004]

However, in the conventional radio communication apparatus up to now, the mixer for converting the intermediate frequency to the radio frequency in the transmission system or the converter for converting the radio frequency to the intermediate frequency in the reception system is provided as a mixer. And a local switch and a drive amplifier as a local drive of the mixer.
As in the device described in Japanese Patent Application Laid-Open No. 729, there may be a case where a plurality of arithmetic processing circuits are provided, and the device cannot be downsized.

[0005] The present invention has been made in view of such circumstances, and provides a wireless communication apparatus and a wireless communication method capable of achieving downsizing by sharing a transmission mixer and a reception mixer. The purpose is to be able to.

[0006]

In order to achieve the above object, a wireless communication apparatus according to the present invention performs transmission and reception alternately, and switches a mixer of a frequency conversion unit between an intermediate frequency and a radio frequency to a transmission side. And a frequency conversion unit shared on the reception side, and a selection unit for selecting transmission or reception at the intermediate frequency end of the mixer of the frequency conversion unit, and selecting transmission or reception at the radio frequency end. Constitute.

With this configuration, transmission and reception are alternately communicated, and the mixer of the frequency converter for the intermediate frequency and the radio frequency is shared between the transmission side and the reception side.
Selection of transmission or reception at the intermediate frequency end of the mixer, selection of transmission or reception at the radio frequency end, and sharing of the transmission mixer and the reception mixer so that downsizing can be achieved. Can be.

The wireless communication apparatus according to the present invention is configured so that the selecting means includes a switching means for switching between transmission and reception.

With this configuration, transmission and reception are switched, and the transmission mixer and the reception mixer are shared, so that the size can be reduced.

A base station radio communication apparatus according to the present invention is a frequency conversion means for transmitting and receiving data to and from a base station alternately and sharing a mixer of a frequency conversion unit between an intermediate frequency and a radio frequency on a transmission side and a reception side. And selecting means for selecting transmission or reception at the intermediate frequency end of the mixer of the frequency conversion unit and for selecting transmission or reception at the radio frequency end.

With this configuration, transmission and reception are alternately communicated, and the mixer of the frequency converter for the intermediate frequency and the radio frequency is shared between the transmission side and the reception side,
By selecting transmission or reception at the intermediate frequency end of the mixer, selecting transmission or reception at the radio frequency end, and sharing the transmission mixer and the reception mixer at the base station, the size can be reduced. Can be

[0012] The control station radio communication apparatus of the present invention alternately communicates transmission and reception to the control station, and shares a mixer of a frequency conversion unit between the intermediate frequency and the radio frequency on the transmission side and the reception side. And selecting means for selecting transmission or reception at the intermediate frequency end of the mixer of the frequency conversion unit and for selecting transmission or reception at the radio frequency end.

With this configuration, the transmission and the reception are alternately communicated, and the mixer of the frequency conversion unit for the intermediate frequency and the radio frequency is shared between the transmission side and the reception side.
By selecting transmission or reception at the intermediate frequency end of the mixer, selecting transmission or reception at the radio frequency end, and sharing the transmission mixer and the reception mixer in the control station, the size can be reduced. Can be

A mobile station radio communication apparatus according to the present invention is a frequency conversion means for transmitting and receiving data to a mobile station alternately and sharing a mixer of a frequency conversion unit between an intermediate frequency and a radio frequency on a transmission side and a reception side. And selecting means for selecting transmission or reception at the intermediate frequency end of the mixer of the frequency conversion unit and for selecting transmission or reception at the radio frequency end.

With this configuration, transmission and reception are alternately communicated, and the mixer of the frequency converter for the intermediate frequency and the radio frequency is shared between the transmission side and the reception side,
By selecting transmission or reception at the intermediate frequency end of the mixer, selecting transmission or reception at the radio frequency end, and sharing the transmission mixer and the reception mixer in the mobile station, miniaturization can be achieved. Can be

According to the radio communication method of the present invention, a step of selecting frequency conversion between an intermediate frequency and a radio frequency when transmitting and receiving are alternately communicated, and a step of selecting transmission or reception at an intermediate frequency end. Selecting transmission or reception at the radio frequency end.

In this way, when the transmission and the reception are alternately communicated, the frequency conversion between the intermediate frequency and the radio frequency is selected, the transmission or the reception at the intermediate frequency end is selected, and the transmission at the radio frequency end is selected. By selecting transmission or reception and sharing the transmission mixer and the reception mixer, downsizing can be achieved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The gist of the present invention is to enable a wireless communication device for next-generation high-speed data wireless communication to have a simplified configuration and to be miniaturized.

(Embodiment 1) FIG. 1 is a block diagram showing a configuration of a wireless communication apparatus according to Embodiment 1 of the present invention. In the figure, the wireless communication apparatus supplies a predetermined voltage to the mixer 5 so that the mixer 5 between the circuit A and the circuit B can convert IF to RF in the transmission system and convert RF to IF in the reception system. Is applied to the circuit C.

The operation of the transmission system is orthogonally transformed by a modulator (MOD) 1 using a baseband signal composed of I and Q signals to generate an IF signal. Note that the switch to the modulator 1 or the demodulator 30 can be switched by the switch 3 connected to the power supply 2.

Gain control amplifier (GCA: Gain Co)
In the control AMP) 4, after the level of the IF signal is controlled, the signal is converted into an RF signal by the mixer 5.

The RF signal output from the mixer 5 includes a primary amplifier 6, a primary bandpass filter BPF7, a secondary amplifier 8, a secondary bandpass filter 9, and a power amplifier PA10.
, And is transmitted from the antenna 13 through the isolator 11 and the RF switch 12.

The receiving side operation is such that after the RF signal received by the antenna 13 passes through the RF switch 12, it is input from the receiving bandpass filter 14 to the linear amplifier LNA 15, amplified, and converted into an IF signal by the mixer 5. Has become.

In this embodiment, the power supply 16 is connected to the mixer 5.
An output obtained by amplifying the power supply voltage from the amplifier 17 by the amplifier 17 is applied to enable bidirectional conversion of RF-IF. In the mixer 5, the IF is converted into RF in the transmission system,
The receiving system can convert RF into IF.

The reception IF signal of the mixer 5 is supplied to a gain control amplifier (GCA: (Gain Control AMP) 1).
After the level is controlled by 8, the demodulator 30 converts the signal into a baseband signal composed of I and Q signals.

(Embodiment 2) In Embodiment 2, the configuration of the circuits A to C is the same as that of Embodiment 1 and the same reference numerals are given, and the detailed description is omitted here.

FIG. 2 is a block diagram showing a configuration of the wireless communication apparatus according to the second embodiment of the present invention. In the second embodiment, the mixer 5 between the circuit A and the circuit B
The configuration is different from that of the first embodiment in that they are connected via the first and second intervening parts.

A switch 32 is connected to the RF end of the mixer 5 and a switch 31 is connected to the IF end of the mixer 5 so that the transmission operation or the reception operation of the mixer 5 can be controlled by the switches 31 and 32.
Can be switched by the By switching the transmission operation or the reception operation of the mixer 5 by the switches 31 and 32, the transmission and reception sharing operation of the mixer 5 can be enabled.

(Third Embodiment) In the third embodiment, the configurations of the circuits A to C are the same as those in the first and second embodiments, the same reference numerals are given, and the detailed description is omitted here.

FIG. 3 is a block diagram showing the configuration of the wireless communication apparatus according to the third embodiment of the present invention. Embodiment 3 differs from Embodiments 1 and 2 in that mixer 5 between circuit A and circuit B is connected via circulators 41 and 42.

The circulator 4 is connected to the RF end of the mixer 5.
2 and the circulator 41 is connected to the IF end of the mixer 5 so that the transmission operation or the reception operation of the mixer 5 can be separated by the circulators 41 and 42. By separating and connecting the transmission operation or the reception operation of the mixer 5 by the circulators 41 and 42, the transmission and reception sharing operation of the mixer 5 can be enabled.

(Fourth Embodiment) In the fourth embodiment, the configurations of the circuits A and B are the same as those in the first to third embodiments, the same reference numerals are given, and the detailed description is omitted here.

FIG. 4 is a block diagram showing a configuration of the wireless communication apparatus according to the fourth embodiment of the present invention. In the fourth embodiment, the balance mixers 50 and 51 are used as the mixer between the circuit A and the circuit B.
An RF 90-degree hybrid 53 and an IF 90-degree hybrid 52 are provided so as to sandwich 0 and 51 therebetween.

The balance mixer 50 and the balance mixer 51
Between them, a local two-way divider 54 is provided, and a circuit D comprising an amplifier 55 for amplifying the power supply voltage of the power supply 56 is connected.

In the present embodiment, since the two terminals of RF and IF perform operations limited to transmission or reception, the mixer 5 can perform the transmission / reception sharing operation.

(Fifth Embodiment) A fifth embodiment shows a specific circuit configuration example of the mixer according to the second embodiment. FIG. 5 is a block diagram of a main part in FIG.

In the figure, a mixer 5 includes an RF filter 5a at an RF end, a filter 5b at an IF end, and a GaAs FET.
A resistive mixer is constituted by 5c and the gate bias resistor 5d.

The local oscillation signal is input from the terminal 5e. The RF signal input from the terminal T1 is converted into an IF signal by the terminal T2, and the IF signal input to the terminal T2 is input from the terminal T1. Since it is converted to an RF signal,
Bidirectional operation of RF and IF can be performed.

(Embodiment 6) Embodiment 6 shows an example of a specific circuit configuration of the mixer according to Embodiment 4. FIG. 6 is a block diagram of a main part in FIG.

In the figure, balance mixers 50, 51
Are RF filters 50a and 51a at the RF end, filters 50b and 51b at the IF end, and GaAs FETs 50c and 51c.
The resistive mixer is constituted by the gate bias resistors 50d and 51d. This allows
It becomes possible to share transmission operation and reception operation

In the first to sixth embodiments described above, the transmission IF-RF conversion and the reception RF-IF conversion are shared by one mixer, so that the size of the TDD wireless device can be reduced. it can.

[0042]

As described above, according to the present invention, the size can be reduced by sharing the transmission mixer and the reception mixer.

[Brief description of the drawings]

FIG. 1 is a block diagram of a wireless communication device according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a wireless communication device according to a second embodiment of the present invention.

FIG. 3 is a block diagram of a wireless communication device according to a third embodiment of the present invention.

FIG. 4 is a block diagram of a wireless communication device according to a fourth embodiment of the present invention.

FIG. 5 is a block diagram of a main part in FIG. 2;

FIG. 6 is a block diagram of a main part in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Modulator 2 Power supply 3 Changeover switch 5 Mixer 31, 32 Switch 41, 42 Circulator 50, 51 Balance mixer 50a, 51a RF filter at RF end 50b, 51b Filter at IF end 52 IF90 ° hybrid 53 RF90 ° hybrid

Claims (6)

[Claims] 1. A frequency conversion means for transmitting and receiving data alternately and sharing a mixer of a frequency conversion unit between an intermediate frequency and a radio frequency on a transmission side and a reception side, and an intermediate frequency of the mixer of the frequency conversion unit. A wireless communication device comprising: a selection unit that selects transmission or reception at an end and selects transmission or reception at a radio frequency end. 2. The wireless communication apparatus according to claim 1, wherein said selection means includes a switching means for switching between transmission and reception. 3. A frequency conversion means for transmitting and receiving data to and from a base station alternately and sharing a mixer of a frequency conversion unit between an intermediate frequency and a radio frequency on a transmission side and a reception side;
A base station radio communication apparatus comprising: a selection unit that selects transmission or reception at an intermediate frequency end of a mixer of the frequency conversion unit and selects transmission or reception at a radio frequency end. 4. A frequency conversion means for transmitting and receiving data to a control station alternately and sharing a mixer of a frequency conversion unit between an intermediate frequency and a radio frequency on a transmission side and a reception side;
A control station radio communication apparatus comprising: a selection unit that selects transmission or reception at an intermediate frequency end of a mixer of the frequency conversion unit and selects transmission or reception at a radio frequency end. 5. A frequency conversion means for transmitting and receiving data to and from a mobile station alternately and sharing a mixer of a frequency conversion unit between an intermediate frequency and a radio frequency on a transmission side and a reception side;
A mobile station radio communication apparatus comprising: a selection unit that selects transmission or reception at an intermediate frequency end of a mixer of the frequency conversion unit and selects transmission or reception at a radio frequency end. 6. When transmitting and receiving are alternately performed,
Selecting a frequency conversion between an intermediate frequency and a radio frequency; selecting transmission or reception at the intermediate frequency; and selecting transmission or reception at a radio frequency. Communication method.