KR200194989Y1 - Integrated cdma hard handoff apparatus - Google Patents

Abstract

The present invention is a 4.95MHz signal generator which is CDMA pilot intermediate frequency (hereinafter referred to as IF) and a device that generates a time division cyclically to 800MHz after upconvertering to 70MHz after receiving IF 4.95MHz as an input. In the present invention, a controller 180 for controlling a system, a pilot generator 100 for QPSK modulation and output, an IF generator 200 for outputting a 70 MHz IF signal, and a switching agent The first switching unit 110, the first amplifying unit 112 to amplify, the second attenuating unit 114 to variably attenuate within a range of 30 dB under the control of the controller 180, and A first band pass filter 116 for passing only a signal, a second amplifier 118 for amplifying an input signal, a divider unit 119 for distributing an input signal, a time division periodic RF signal and a time division aperiodic RF RF signal generator 120 for outputting a signal, time division period type and ratio After receiving the combined RF signal once type is characterized in that which consists of combiner 150 that outputs the RF signal.

Description

Integrated CDA Hard Handoff Device {INTEGRATED CDMA HARD HANDOFF APPARATUS}

The present invention relates to a code division multiple access (CDMA) signal generator, and in particular, a traffic FA in a wireless communication system such as CDMA cellular or personal mobile communication (PCS). (Frequency Area, hereinafter referred to as FA) relates to an integrated CDA hard handoff device used for handoff between different base stations.

Conventionally, call-drop phenomenon occurs frequently when a general base station using a large number of FAs and a small CDMA base station using fewer FAs than a single or general base station are adjacent to each other. In this case, a general base station In the case of a FA that is commonly used between a small base station and a mobile station, a call connection may be made when the terminal is moved, but there is a problem in that call disconnection occurs in different FAs.

The present invention is to solve the above conventional problems, the CDMA pilot intermediate frequency (hereinafter referred to as IF) signal generator of 4.95MHz and IF 4.95MHz as input receives upconverting (upconvertering) to 70MHz In addition, the integrated time-division device that occurs periodically at 800 MHz is to provide an integrated CDM hard handoff device.

In addition, the present invention can actively cope with the time delay by allowing the baseband pilot signal source to set a time delay of up to ± 52 로 in units of 0.8138 위하여 to cope with the problem of time delay in the base station having a repeater. An integrated CDA hard handoff device is provided.

In order to achieve the above object, the present invention-integrated CDA hard handoff device includes a control device for controlling a system, and a pilot generation that receives Even_Sec and Sys_Clk signals, which are synchronous signals input to a base station, modulates and outputs QPSK signals. A device, an IF generator for receiving an RF signal and outputting an IF signal of 70 MHz, a signal output from the pilot generator and an IF signal output from the IF generator according to a preset time set by a user A first switching unit for switching, a first amplifying unit for receiving and amplifying a signal switched by the first switching unit, and an IF signal of 70 MHz among the signals amplified by the first amplifying unit under the control of the controller. A second attenuator that variably attenuates within a range of 30 dB and a signal that is variably attenuated by the second attenuator; A first band pass filter to pass through, a second amplifying unit to receive and amplify the signal passed by the first band pass filter, a divider unit to receive and distribute a signal output from the second amplifying unit, and the divider An RF signal generator for distributing a time-division periodic RF signal and a time-division aperiodic RF signal under control of the controller; and a time-division periodic and time-division aperiodic RF signal output from the RF signal generator. It is characterized by consisting of a combiner that receives the input and combines these signals to output an RF signal.

In addition, the integrated CDA hard handoff device of the present invention for achieving the above object, the control device for controlling the system, and receives the Even_Sec and Sys_Clk signals, which are synchronous signals input to the base station, QPSK modulated and outputs A preset time set by a user by receiving a lot generator, an IF generator for receiving an RF signal and outputting a 70 MHz IF signal, a signal output from the pilot generator and an IF signal output from the IF generator A first switching unit for switching according to the first switching unit, a first amplifying unit for receiving and amplifying the signal switched by the first switching unit, and an IF signal of 70 MHz among the signals amplified by the first amplifying unit under the control of the controller A second attenuator for variably attenuating within a range of 30 dB and a signal variably attenuated at the second attenuator; A first band pass filter for passing only a call, a second amplifier for receiving and amplifying a signal passed by the first band pass filter, and a signal amplified by the second amplifier for receiving and controlling the control device And an RF signal generator for outputting a time division periodic RF signal or a time division aperiodic RF signal.

1 is a detailed block diagram of an integrated CDA hard handoff device of the present invention.

<Description of the code | symbol about the principal part of drawing>

100: pilot generating device 101: pilot generating unit

104: Equalizer 106: Modulator

108: first attenuator 110: first switching unit

112: first amplifying unit 114: second attenuating unit

116: first band pass filter 118: second amplifying unit

119: divider 120: RF signal generator

121: first low pass filter 123: second switching unit

124: third switching unit 125: first mixer

126: second mixer section 127: third amplifier section

128: fourth amplifier 129: second band pass filter

130: third band pass filter 131: third attenuation portion

132: fourth attenuator 133: fourth band pass filter

134: fifth band pass filter 135: first high power amplifier

136: second high power amplifier 150: combiner

152: coupler 180: controller

200: IF generator 201: fifth attenuator

202: third mixer section 204; Fifth amplifier

Hereinafter, described in detail through the embodiment according to the present invention as described above.

The present invention is a scheme used to facilitate handoff between different base stations with different traffic FAs in a wireless communication system such as a cellular system (Cellular) or a PCS, and the characteristics of the time division periodic RF signal generator used in the present invention. In general, the output frequency is a cellular output frequency band (869-894 MHz) or a PCS output frequency (1840-1870 MHz) and the transmit IF (Tx IF) signal is a baseband signal (center frequency 0) and a first frequency. The frequency is obtained by mixing the local oscillation frequency 70MHz, the bandwidth has a bandwidth of 1.23MHz used in the CDMA method.

FIG. 1 is a schematic and detailed block diagram of the present invention, and a pilot generator 100 for controlling a system and a QPSK modulated output signal receiving Even_Sec and Sys_Clk signals, which are synchronous signals input to a base station, and outputting the modulated signals. ), An IF generator 200 receiving an RF signal and outputting an IF signal of 70 MHz, a signal output from the pilot generator 100 and an IF signal output from the IF generator 200 are input. A first switching unit 110 which switches according to a time set by a user in advance, that is, receives a synchronization signal and an RF signal output from a base station and switches down-converted IF signals; A first amplifier 112 for amplifying a signal switched at 110, that is, a synchronization signal of a base station or an IF signal of 70 MHz, and the first amplifier 112 under control of the controller 180; IF signal amplified at 70MHz A second attenuator 114 that digitally attenuates the signal within a range of 30 dB with respect to the signal, and a first attenuated signal that is variably attenuated by the second attenuator 114 and passes only a signal of a predetermined band. A band pass filter 116, a second amplifier 118 that receives and amplifies the signal passed by the first band pass filter 116, and a signal output from the second amplifier 118 The divider unit 119 for distributing and the RF signal generator 120 distributed by the divider unit 119 and outputting time-division periodic RF signals and time-division aperiodic RF signals under the control of the controller 180. And a combiner 150 that receives the time-division periodic and time-division aperiodic RF signals output from the RF signal generator 120 and combines these signals.

The pilot generator 100 receives a pilot signal 101 for generating a pilot signal by receiving signals of Even_Sec and Sys_Clk, which are synchronization signals of a base station, under the control of the controller 180; A D / A converter 102 for receiving a pilot signal generated by the pilot generator 101 and converting a digital signal into an analog signal, and receiving a signal output from the D / A converter 102 in phase. Equalizer 104 having constant characteristics, Modulator 106 for receiving QPSK modulation from the signal output from Equalizer 104 under the control of controller 180, and the modulator ( And a first attenuator 108 for receiving and attenuating the QPSK modulated signal at 106.

If the IF generator 200 cannot receive the Even_Sec and Sys_Clk signals as described above, the IF generator 200 receives the RF signal and attenuates the RF signal, and the RF signal attenuated by the fifth attenuator 201. And a third mixer unit 202 for receiving a local oscillation signal output under the control of the controller 180 and outputting a 70 MHz IF signal, and amplifying the IF signal output from the third mixer unit 202. And a fifth amplifier 204.

The RF signal generator 120 is configured to correspond to each other so that the time-division periodic type and the time-division aperiodic type can be used simultaneously. For example, the third switching unit 126 is the control device 180 The second switching unit 125 operates in a time division aperiodic type when operating in a time division aperiodic type under the control of. In contrast, when the third switching unit 126 operates in a time division aperiodic type, the second switching unit 125 operates in a time division aperiodic type. The second switching unit 125 operates in a time division period type.

If the time division periodic type and the time division aperiodic type are not used at all according to a user's selection, the divider unit 119 and the combiner 150 need not be used.

Therefore, the RF signal generator 120 receives the signal distributed by the divider 119 and passes only a low frequency signal, thereby causing noise generated by the third switch 124 at the rear end to be divided by the divider 119. The control device receives the first and second low pass filters 121 and 122 and the signals passing through the first and second low pass filters 121 and 122 to prevent the second switching unit 123 from being input to the second switching unit 123. The second and third switching units 123 and 124 switching according to a time set by a user according to the control of the user 180, the IF signal switched by the second and third switching units 123 and 124, and the control device 180. First and second mixers 125 and 126 for time-divisionally and time-divisionally outputting the RF signal of the 800 MHz band by receiving the local oscillation signal output according to the control, and outputs from the first and second mixers 125 and 126. Time-division periodic and time-division aperiodic RF signals Third and fourth amplifiers 127 and 128 for receiving and amplifying the signal, and third and fourth band pass filters 129 and 130 for receiving signals amplified by the third and fourth amplifiers 127 and 128 and passing only signals of a predetermined band; And a third and fourth attenuators 131 and 132 for attenuating signals passing only signals of a predetermined band by the third and fourth band pass filters 129 and 130, and output from the third and fourth attenuators 131 and 132. First and fifth band pass filters 133 and 134 that receive a signal and output only signals of a predetermined band, and first and second signals that amplify a signal of a predetermined level by receiving signals output from the fourth and fifth band pass filters 133 and 134. 2, high power amplifiers 135 and 136, and the first and second high power amplifiers 135 and 136.

The second and third switching units 123 and 124 are time-division periodic and time-division aperiodic switches for frequency conversion operated under the control of the control unit 180. When two or more FAs are set, the control unit 180 The PLL local oscillator, which operates under the control of C, operates to make a frequency hopping, and to perform on / off operation to remove the in-band spurious.

At this time, if it is on, the PLL is locked, and if it is off, the frequency hopping is performed. This is a switch for removing spurious.

The second and third switching units 123 and 124 may be applied to other switching devices shown in the present circuit. The same principle as that of the third switching unit 124 may also be applied to the first switching unit 110 described above. do.

In addition, the third and fourth band pass filters 129 and 130 and the fourth and fifth band pass filters 133 and 134 have a bandwidth of 25 MHz (in case of CDMA Cellualr or in case of 30 MHz PCS). Considering each mobile carrier, that is, 20 channels in case of cellular and 21 channels in case of PCS, the signal output from 129 passes through the band with the center frequency of ± 12.5MHz at 881MHz in case of Celluar, In this case, only the designated frequency band of each enterprise will pass.

In addition, the controller 180 can actively cope with the delay time that is a problem in the base station by setting a time delay of ± 52 ms to the baseband pilot signal source in units of 0.8138 ms.

As described above, the configuration in the case of using only one of the time division periodic type or the time division aperiodic type is as follows.

A controller 180 for controlling the system, a pilot generator 100 for receiving a synchronous signal inputted to a base station, and outputting QPSK modulation, and an IF generator for receiving an RF signal and outputting a 70 MHz IF signal ( 200, the first switching unit 110 receiving the signal output from the pilot generator 100 and the IF signal output from the IF generator 200 and switching according to a time preset by a user; 70 MHz of the first amplifying unit 112 for receiving and amplifying the signal switched by the first switching unit 110 and the amplified signal from the first amplifying unit 112 under the control of the controller 180. A second attenuator 114 that variably attenuates within a range of 30 dB with respect to the IF signal of the first band, and a first band that receives only a signal of a predetermined band by receiving a signal variably attenuated by the second attenuator 114. Pass filter 116 and the first band pass filter 116 A second amplifying unit 118 for receiving and amplifying a signal passed through the signal, and a time-division periodic RF signal under the control of the controller 180 receiving the amplified signal by the second amplifying unit 118 or RF signal generator 120 for outputting a time division aperiodic RF signal.

The pilot generator 100 receives a signal of Even_Sec and Sys_Clk, which are synchronization signals of a base station, and generates a pilot signal under the control of the controller 180, and a pilot generator 101 for generating a pilot signal. Receiving a pilot signal generated by the pilot generator 101 receives a signal output from the D / A converter 102 and the digital signal converted to an analog signal, the D / A converter 102 An equalizer 104 for keeping the phase characteristics constant, a modulator 106 for receiving a signal output from the equalizer 104 under the control of the controller 180, and performing QPSK modulation; And a first attenuator 108 for receiving and attenuating the QPSK modulated signal at 106.

In addition, the RF signal generator 120 is switched by the second switching unit 123 and the second switching unit 123 for switching according to a time preset by the user under the control of the control device 180. A first mixer unit 125 which receives an IF signal and a local oscillation signal output under the control of the controller 180 and outputs an 800 MHz band RF signal in a time divisionally periodic or time divisionally asymmetric manner; and the first mixer unit A third amplifying unit 127 for receiving and amplifying a time division periodic type or a time division aperiodic RF signal output from the 125 and a signal of a predetermined band receiving the amplified signal from the third amplification unit 127 The third band pass filter 129 to pass through, the third attenuator 131 for attenuating the signal passing only a signal of a predetermined band in the third band pass filter 129, and the third attenuator 131 The signal output from the A fourth band pass filter 133 that outputs only a call, a first high power amplifier 135 that receives a signal output from the fourth band pass filter 133 and amplifies a signal of a predetermined level, and the first high power The amplifier 135 is comprised.

The second switching unit 123 is operated as a time division periodic type or time division aperiodic type switch under the control of the control device 180.

If the IF generator 200 cannot receive the Even_Sec and Sys_Clk signals as described above, the IF generator 200 receives the RF signal and attenuates the RF signal, and the RF signal attenuated by the fifth attenuator 201. And a third mixer unit 202 for receiving a local oscillation signal output under the control of the controller 180 and outputting a 70 MHz IF signal, and amplifying the IF signal output from the third mixer unit 202. And a fifth amplifier 204.

Reference numeral 152 is a coupler connected to the combiner 150 to observe the RF signal from the outside.

The operation and effects on the integrated CDA hard handoff device of the present invention configured as described above are as follows.

The pilot generator 101 receiving the Even_Sec and Sys_Clk signals, which are the synchronization signals of the base station, generates a pilot signal, and in this way, the D / A converter receiving the pilot signal generated by the pilot generator 101 ( In 102, the digital signal is converted into an analog signal, and then the equalizer 104 keeps the phase characteristics of the signal output from the D / A converter 102 constant.

As described above, the pilot signal whose phase characteristics are kept constant by the equalizer 104 is input to the modulator 106 to perform QPSK modulation, and the QPSK modulated signal is modulated by the modulator 106. It is inputted to the first attenuator 108 to attenuate.

On the other hand, when the Even_Sec and Sys_Clk signals, which are the synchronization signals of the base station, cannot be received as described above, the RF mixer receives the RF signal and attenuates it uniformly in the fifth attenuator 201. A local oscillation signal output under the control of the controller 180 and the RF signal are mixed to output an IF signal.

Then, the IF output by the third mixer 202 is amplified at 70 MHz by the fifth amplifier 204 and then input to the first switching unit 110.

As described above, the first switching unit 110 receives the signal output from the first attenuator 108 and the IF signal output from the fifth amplifying unit 204, and the base station is switched by the user according to a preset time. If the synchronization signal of the base station or the base station cannot receive the synchronization signal, the RF signal is input to the mobile station from the general base station to the small base station when the mobile station can be handed off.

The signal output by switching any one of the two signals input to the first switching unit 110 is input to the first amplifying unit 112 and amplified, and then input to the second attenuator 114 to the Under the control of the controller 180, the entire output of the system is variably attenuated within a 30 dB range.

The signal attenuated within the range of 30 dB by the second attenuator 114 is input to the first band pass filter 116 to output only a signal of a predetermined frequency band, and the signal output from the first band pass filter 116. Is input to the second amplifier 118 and amplified.

The signal amplified by the second amplifier 118 to a predetermined level is input to the divider 119 and separated into a process for time division periodic RF signal generation and a time division aperiodic RF signal generation.

As described above, since the time-division periodic RF signal and the time-division aperiodic RF signal separated by the divider unit 119 are different from each other in time division or time division aperiodic, only one path will be described.

That is, the signal separated by the divider unit 119 is input to the second low pass filter 122 to pass only a low frequency signal, and the signal passed by the second low pass filter 122 is the third switching. Input to the unit 124 is switched by the control of the control device 180.

In the second mixer 126 receiving the IF signal switched by the third switching unit 124 and the local oscillation signal output under the control of the controller 180, the third switching unit ( 124 and the RF signal is output after mixing the signal output from the control device 180.

The fourth amplifier 128 receives the RF signal output from the second mixer 126 at a predetermined level, and the signal amplified by the fourth amplifier 128 is the third band. Input to the pass filter 130 to pass only the band of the 800MHz RF signal.

The fourth attenuator 132 receiving the 800 MHz band RF signal by the third band pass filter 130 attenuates the signal, and the signal attenuated by the fourth attenuator 132 is again an 800 MHz RF signal. Pass the band of.

As described above, the 800 MHz RF signal passing through the fifth band pass filter 134 is input to the second high power amplifier 136 to amplify high power and then to the combiner 150.

The RF signal of the 800 MHz band input to the combiner 150 is combined with a time division aperiodic RF signal as described above to output an RF signal.

As such, the RF signal output from the combiner 150 enables a smooth handoff when the mobile station moves from the general base station to the small base station.

The integrated CDA hard handoff device of the present invention configured as described above has a 4.95MHz signal generator, which is a CDMA pilot IF, and an IF 4.95MHz as an input, upconverted to 70MHz, and then time-division periodic or time division ratio to 800MHz again. Occurs periodically and can actively cope with time delays by allowing the baseband pilot signal source to set a time delay of up to ± 52 ms in units of 0.8138 ms in order to deal with problematic time delays. And up-converting from baseband to single IF of 70MHz without using IF stages of 4.95MHz and 70MHz, resulting in reduced hardware and in addition to receiving Even_Sec and Sys_Clk signals, which are the synchronization signals of base stations For, we receive the RF signal, downconvert to 70MHz and upconvert to 800MHz again. It is devised to be able to hand off.

Claims (12)

The controller 180 for controlling the system, the pilot generator 100 for receiving the Even_Sec and Sys_Clk signals, which are synchronous signals input to the base station, and modulating and outputting the QPSKs, and outputting an IF signal at 70 MHz by receiving an RF signal. A first switching unit configured to receive an IF signal output from the IF generator 200, the pilot generator 100 and an IF signal output from the IF generator 200, and switch according to a time preset by a user; The unit 110, a first amplifier 112 that receives and amplifies the signal switched by the first switch 110, and the first amplifier 112 under the control of the controller 180. The second attenuator 114 variably attenuates within a range of 30 dB with respect to the IF signal of 70 MHz among the signals amplified by and receives a signal of a predetermined band that is variably attenuated by the second attenuator 114. First band pass filter 116 to pass through, and A second amplifier 118 for receiving and amplifying the signal passed by the first band pass filter 116, a divider unit 119 for receiving and distributing the signal output from the second amplifier 118; An RF signal generator 120 that is distributed by the divider unit 119 and outputs a time division periodic RF signal and a time division aperiodic RF signal under the control of the controller 180, and the RF signal generator 120 And a combiner 150 for receiving the time-division periodic type and time-division non-periodic RF signals outputted from the combination and outputting the RF signals by combining their signals. The pilot generation apparatus of claim 1, wherein the pilot generator 100 receives a signal of Even_Sec and Sys_Clk, which are synchronization signals of a base station, under the control of the controller 180, and generates a pilot signal. A unit 101, a D / A converter 102 for receiving a pilot signal generated by the pilot generating unit 101 and converting a digital signal into an analog signal, and outputting from the D / A converter 102. An equalizer 104 for receiving a signal to be uniform in phase characteristics and a modulator 106 for receiving QPSK modulation from a signal output from the equalizer 104 under control of the controller 180; And a first attenuator (108) for receiving and attenuating the QPSK modulated signal from the modulator (106). The IF generator 200 of claim 1, wherein the IF generator 200 receives attenuated RF signals when the Even_Sec and Sys_Clk signals cannot be received as described above, and the fifth attenuator 201. A third mixer unit 202 for receiving an RF signal attenuated by a local oscillation signal and a local oscillation signal output under the control of the controller 180, and outputting an IF signal of 70 MHz, and outputting the third mixer unit 202. And a fifth amplifying unit (204) for amplifying the IF signal. According to claim 1, wherein the RF signal generating unit 120 is configured as a device corresponding to each other integrated time-divisional and time-division aperiodic integrated integrated CD hard handoff device, characterized in that configured to be used at the same time. 5. The RF signal generator 120 receives the signal distributed from the divider 119 and generates noise generated by the third switch 124 through the divider 119. The first and second low pass filters 121 and 122 and the signals passing through the first and second low pass filters 121 and 122 to prevent the second switching unit 123 from being input are received. According to control, the second and third switching units 123 and 124 switch according to a preset time by the user, and the IF signal switched by the second and third switching units 123 and 124 and the control of the controller 180. First and second mixers 125 and 126 for time-divisionally and time-divisionally reproducing RF signals in the 800 MHz band by receiving the local oscillation signals outputted, and time-division periodic types output from the first and second mixers 125 and 126. And third and fourth amplifiers for receiving and amplifying a time division aperiodic RF signal ( 127 and 128, third and fourth band pass filters 129 and 130 which receive signals amplified by the third and fourth amplifiers 127 and 128 and pass only signals of a predetermined band, and the third and fourth band pass filters 129 and 130, respectively. ) And the fourth and fourth attenuators 131 and 132 for attenuating the signal passing only a signal of a predetermined band, and the fourth and fourth signals for outputting only signals of a predetermined band by receiving signals output from the third and fourth attenuators 131 and 132. And fifth band pass filters 133 and 134, first and second high power amplifiers 135 and 136 for receiving signals output from the fourth and fifth band pass filters 133 and 134 and amplifying a predetermined level signal. Integrated CDM hard handoff device comprising two high power amplifier (135, 136). 6. The integrated CD according to claim 5, wherein each of the second and third switching units 123 and 124 is operated by a time division periodic type and a time division aperiodic type switch to correspond to each other by being controlled by the control unit 180. MH Hard Handoff Device. According to claim 1, wherein the control unit (180) integrated CDA hard hand-off device, characterized in that for controlling by setting the time delay of the baseband pilot unit of 0.8138 ㎲. The controller 180 for controlling the system, the pilot generator 100 for receiving the Even_Sec and Sys_Clk signals, which are synchronous signals input to the base station, and modulating and outputting the QPSKs, and outputting an IF signal at 70 MHz by receiving an RF signal. A first switching unit configured to receive an IF signal output from the IF generator 200, the pilot generator 100 and an IF signal output from the IF generator 200, and switch according to a time preset by a user; The unit 110, a first amplifier 112 that receives and amplifies the signal switched by the first switch 110, and the first amplifier 112 under the control of the controller 180. The second attenuator 114 variably attenuates within a range of 30 dB with respect to the IF signal of 70 MHz among the signals amplified by and receives a signal of a predetermined band that is variably attenuated by the second attenuator 114. First band pass filter 116 to pass through, and The second amplifier 118 for receiving and amplifying the signal passed by the first band pass filter 116, and the control of the control device 180 receives the signal amplified by the second amplifier 118 An integrated CDA hard handoff device, comprising: an RF signal generator (120) for outputting a time division periodic RF signal or a time division aperiodic RF signal. The IF generator 200 of claim 8, wherein the IF generator 200 receives attenuated RF signals when the Even_Sec and Sys_Clk signals cannot be received as described above, and the fifth attenuator 201. A third mixer unit 202 for receiving an RF signal attenuated by a local oscillation signal and a local oscillation signal output under the control of the controller 180, and outputting an IF signal of 70 MHz, and outputting the third mixer unit 202. And a fifth amplifying unit (204) for amplifying the IF signal. The method of claim 8, wherein the RF signal generator 120 is a second switching unit 123 for switching according to a time preset by the user under the control of the control device 180 and the second switching unit ( A first mixer unit 125 which receives the IF signal switched in step 123 and a local oscillation signal output under the control of the control device 180 and outputs an 800 MHz band RF signal in a time divisional periodic or time divisional manner; A third amplifier 127 for receiving and amplifying a time division periodic type or time division aperiodic RF signal output from the first mixer 125 and a signal amplified by the third amplifier 127 A third band pass filter 129 for passing only a signal of a predetermined band, a third attenuator 131 for attenuating a signal passing only a signal of a predetermined band in the third band pass filter 129, and the third Receives a signal output from the attenuator 131 A fourth band pass filter 133 for outputting only one band signal, a first high power amplifier 135 for amplifying a signal of a predetermined level by receiving the signal output from the fourth band pass filter 133, and An integrated CDA hard handoff device, comprising: a first high power amplifier (135). 12. The integrated CD hard drive-off apparatus according to claim 10, wherein the second switching unit (123) is operated as a time division periodic type or time division aperiodic switch under the control of the controller (180). The pilot generation apparatus of claim 8, wherein the pilot generator 100 receives a signal of Even_Sec and Sys_Clk, which are synchronization signals of a base station, under the control of the controller 180, and generates a pilot signal. A unit 101, a D / A converter 102 for receiving a pilot signal generated by the pilot generating unit 101 and converting a digital signal into an analog signal, and outputting from the D / A converter 102. An equalizer 104 for receiving a signal to be uniform in phase characteristics and a modulator 106 for receiving QPSK modulation from a signal output from the equalizer 104 under control of the controller 180; And a first attenuator (108) for receiving and attenuating the QPSK modulated signal from the modulator (106).