JPH10271034A - Cdma mobile communication receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the reception quality by allowing a mobile communication receiver adopting the time division multiple access (CDMA) method to conduct synchronization acquisition and tracing in response to fluctuation in a selected path timing and a reception SIR. SOLUTION: A mobile communication receiver is provided with a delay profile calculation means 103 that applies moving average to a correlation in response to a moving average time designated by a moving mean time control means 105 to calculate a delayed profile, and the moving average time control means 105 that measures timing fluctuation of a selected path so as to decide the moving average time. The moving average time means 105 decreases the moving average time when the timing fluctuation in the selected path is high and increases when the moving average time is small. Since a path movement follows a rapid timing fluctuation of the selected path due to a high speed movement of the communication equipment by controlling the moving average time of the delay profile in this way, the synchronization acquisition and tracing performance is improved and the reception quality is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system using a CDMA (Code Division Multiple Access) system, and more particularly, to the selection of a path phase based on a delay profile, the phase following performance is affected by interference and noise fluctuations. The present invention relates to a CDMA mobile communication receiver having improved synchronization acquisition / tracking characteristics so that deterioration can be prevented and a path phase can be selected more accurately.

[0002]

2. Description of the Related Art In a mobile communication system such as a cellular phone, a CDMA (Code Division Multiple Access) system is used as an access system. In order to cope with a change in a reception state due to movement during a call, synchronization acquisition and synchronization tracking are performed. Then, the best path is always selected and demodulated. However, in a conventional mobile communication system using the CDMA system, there is a problem of deterioration in characteristics of synchronization acquisition and synchronization tracking due to a change in characteristics of interference and noise. As a CDMA mobile communication device for improving such characteristic deterioration, a device described in JP-A-8-340276 is known.

FIG. 5 shows a configuration of a receiving device of a conventional CDMA mobile communication device. In FIG. 5, 1 receives a carrier signal and outputs a baseband spread signal.
Wireless receiving means. Reference numeral 2 denotes a synchronization despreading unit that inputs a baseband spread signal and outputs a correlation value. 3
Is a delay profile calculating means for inputting a correlation value and outputting a delay profile. Reference numeral 4 denotes threshold switching means for outputting a threshold. Reference numeral 5 denotes a synchronization acquisition and a delay profile input and a selected path phase output.
It is a tracking means. Reference numeral 6 denotes a data demodulation despreading unit that inputs a baseband spread signal and a selected path phase and outputs a despread baseband signal. Reference numeral 7 denotes a data demodulation unit that receives the despread baseband signal and outputs received data.

[0004] The operation of the CDMA mobile communication receiving apparatus configured as described above will be described. The wireless receiving unit 1 converts a signal of a carrier frequency received by an antenna into a baseband signal and outputs the baseband signal. The despreading means for synchronization 2 applies a spreading code to the baseband spread signal while shifting the timing, measures and outputs a correlation value at each timing. This correlation value becomes a large value only when the spreading codes are synchronized. The delay profile calculation means 3 performs a moving average of the input correlation value at each input timing over time to create a delay profile. By moving average in this way,
A delay profile in which the influence of interference and noise from other stations is removed can be obtained.

[0005] The threshold value switching means 4 outputs a threshold value S1 at the time of synchronization acquisition, and outputs a threshold value S2 smaller than S1 after completion of synchronization acquisition. The synchronization acquisition / tracking means 5 outputs the phase of the peak value of the delay profile larger than the input threshold value as the selected path phase. After synchronization acquisition, the time interval between peaks is measured, and only peaks near the peaks are determined as candidates for the selected path phase. The data demodulation despreading means 6 assigns the input selected path phase to N fingers and demodulates data at each timing. The data demodulation means 7 RAKE-combines the despread baseband signal of each finger and outputs received data.

[0006]

However, in the above-mentioned conventional CDMA mobile communication receiving apparatus, it is possible to follow a sudden change in selected path timing due to a high-speed movement of the communication apparatus, and to follow a received SIR fluctuation due to fading or the like. There is a problem that the properties are insufficient.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems. It is an object of the present invention to improve reception quality by performing synchronization acquisition / tracking in a CDMA mobile communication receiver by following a change in a selected path timing or a reception SIR. Aim.

[0008]

According to the present invention, there is provided a CDMA mobile communication receiving apparatus comprising a delay profile calculating means for performing a moving average with a moving average time corresponding to a timing variation of a selected path. When the timing fluctuation of the selected path is large, the moving average time is shortened, and when the fluctuation is small, the moving average time is lengthened, so that the path movement can follow the sudden timing fluctuation of the selected path.

Further, the present invention provides a CDMA mobile communication receiving apparatus, comprising: a delay profile calculating means for performing a moving average with a moving average time corresponding to a ratio between power of a selected path phase obtained from a delay profile and power of another phase. The moving average time is lengthened when the ratio is small and shortened when the ratio is large, so that the noise / interference level of the delay profile is suppressed even if the SIR of the selected path is reduced, and the path phase is accurately obtained. Be able to do it.

Further, according to the present invention, a CDMA mobile communication receiving apparatus is provided with a delay profile calculating means for performing a moving average with a moving average time according to reception quality information obtained at the time of data demodulation. By increasing the average time and shortening when it is good, even if the reception quality is reduced, the noise / interference level of the delay profile is suppressed,
The path phase can be determined accurately.

Further, according to the present invention, the CDMA mobile communication receiving apparatus is provided with synchronization acquisition / tracking means for controlling the number of selected paths for switching timing in accordance with reception quality information obtained at the time of data demodulation. When it is bad, the number of selection path switching is increased, and when it is good, the number of selection path switching is reduced, or the selection path switching is not performed, thereby improving the synchronization acquisition / tracking performance.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 of the present invention provides a radio receiving means for inputting a received carrier signal and outputting a baseband spread signal, and for inputting the baseband spread signal and calculating a correlation value. Synchronization despreading means for outputting, a delay profile calculating means for moving average of the correlation value according to the input moving average time and outputting a delay profile, and inputting the delay profile and outputting a selected path phase Synchronous acquisition / tracking means, moving average time control means for outputting a moving average time corresponding to the timing variation of the selected path phase to the delay profile calculating means, and inputting the baseband spread signal and the selected path phase. Data demodulation despreading means for outputting a despread baseband signal; and inputting the despread baseband signal and outputting received data CD provided with the that data demodulation means
An MA mobile communication receiving apparatus. By controlling the moving average time of a delay profile, the path movement can follow a sudden change in the timing of a selected path due to a high-speed movement of the communication apparatus.

Further, the invention according to claim 2 of the present invention provides:
Radio receiving means for receiving a carrier signal and outputting a baseband spread signal, synchronizing despreading means for receiving the baseband spread signal and outputting a correlation value, and A delay profile calculating unit that outputs a delay profile by moving average of the correlation value;
Synchronous acquisition / tracking means for inputting the delay profile and outputting a selected path phase, and outputting to the delay profile calculating means a moving average time corresponding to a ratio of the power of the selected path phase to the power of another phase. Moving average time control means, data demodulation despreading means for inputting the baseband spread signal and the selected path phase and outputting a despread baseband signal, and inputting the despread baseband signal; A CDMA mobile communication receiving apparatus provided with a data demodulating means for outputting received data by controlling a moving average time of a delay profile.
This has the effect that the noise / interference level of the delay profile can be suppressed even if R decreases.

Further, the invention according to claim 3 of the present invention provides:
Radio receiving means for receiving a carrier signal and outputting a baseband spread signal, synchronizing despreading means for receiving the baseband spread signal and outputting a correlation value, and A delay profile calculating unit that outputs a delay profile by moving average of the correlation value;
Synchronization acquisition / tracking means for inputting the delay profile and outputting a selected path phase, and moving average time control means for outputting a moving average time according to reception quality information obtained at the time of data demodulation to the delay profile calculation means; Receiving the baseband spread signal and the selected path phase and outputting a despread baseband signal; and a demodulation despreading means for inputting the despread baseband signal and outputting received data. And a data demodulation means for obtaining reception quality. The mobile communication reception apparatus further comprises:
This has the effect that the interference level can be suppressed.

The invention according to claim 4 of the present invention provides:
Radio receiving means for inputting a received carrier signal and outputting a baseband spread signal; desynchronizer means for synchronizing inputting the baseband spread signal and outputting a correlation value; And a synchronization acquisition / tracking means for controlling the number of selected paths for switching the timing in accordance with the reception quality information obtained at the time of data demodulation and inputting the delay profile and outputting a selected path phase. A data demodulation despreading means for inputting the baseband spread signal and the selected path phase and outputting a despread baseband signal; and inputting the despread baseband signal and outputting received data And a data demodulation means for obtaining the reception quality.
By controlling the frequency of switching paths according to the fluctuation of the reception quality, it is possible to reduce the possibility of selecting the wrong path phase from the delay profile.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

(First Embodiment) A first embodiment of the present invention relates to a CDMA mobile communication receiving apparatus provided with a delay profile calculating means for performing a moving average with a moving average time corresponding to a timing variation of a selected path. Device.

FIG. 1 shows a CD according to the first embodiment of the present invention.
FIG. 2 shows a block diagram of an MA mobile communication receiving device. In FIG. 1, reference numeral 101 denotes a wireless receiving unit that receives a received carrier signal and outputs a baseband spread signal. 102 is
Synchronization despreading means for inputting a baseband spread signal and outputting a correlation value. 103 inputs a correlation value and a moving average time, and outputs an averaged delay profile,
This is a delay profile calculation unit. The 104 captures the delay profile and outputs the selected path phase.
It is a tracking means. Reference numeral 105 denotes a moving average time control unit that inputs a selected path phase and outputs a moving average time. Ten
6 inputs the baseband spread signal and the selected path phase,
Data demodulation despreading means for outputting the despread baseband signal. 107 is a data demodulation means for receiving the despread baseband signal and outputting the received data.

The operation of the CDMA mobile communication receiving apparatus configured as described above will be described. Radio receiving means 101 converts a signal of a carrier frequency received by an antenna into a baseband signal and outputs the baseband signal. The synchronization despreading means 102 applies a spreading code to the baseband signal while shifting the timing, measures and outputs a correlation value at each timing. This correlation value becomes a large value only when the spreading codes are synchronized. The delay profile calculation means 103 performs a moving average of the input correlation value at each timing over time to create a delay profile. By performing the moving average in this manner, a delay profile from which the influence of interference or noise of other stations is removed can be obtained. At this time, the time length for moving average is
According to the input moving average time.

The synchronization acquisition / tracking means 104 selects the upper N timings of the value of the delay profile and outputs each timing as a selected path phase for RAKE combining. The timing of the incoming wave to the receiver changes with the time variation of the communication channel.
At 104, the timing following the movement is output.
The moving average time control unit 105 measures the amount of path variation from the input selected path phase and determines the moving average time. When the timing fluctuation of the arriving wave to the receiving apparatus is small, the effect of suppressing interference and noise is increased by increasing the moving average time in the delay profile calculation means 103.

However, when the fluctuation of the timing of the arriving wave is large, it is desirable to shorten the averaging time so as to reduce the influence of the previous path. Therefore, the moving average time control means 105 stores the past selected path phase, measures the amount of change or the frequency of change with the input current selected path, and when the amount of change or the frequency of change is large, Control is performed so as to shorten the moving average time, and to lengthen the moving average time when the fluctuation amount or fluctuation frequency is small. By performing such control, a delay profile can be obtained with an optimal moving average time according to the path fluctuation. Therefore, the path phase can be more accurately determined in the synchronization acquisition / tracking means 104, and the synchronization acquisition / tracking performance is improved.

The data demodulation despreading means 106 allocates the input selected path phase to N fingers and demodulates data at each timing. Data demodulation means 107
Converts the despread baseband signal of each finger to RA
The received data is output by KE combining.

As described above, according to the first embodiment of the present invention, the delay profile calculating means for performing the moving average according to the input moving average time, and the moving average according to the timing variation of the selected path. By providing a moving average time control means for controlling the time and controlling the moving average time of the delay profile, the path movement can follow a sudden change in the selected path timing due to the high-speed movement of the communication device. Performance is improved.

(Second Embodiment) In a second embodiment of the present invention, a moving average is performed with a moving average time corresponding to a ratio between the power of the selected path phase obtained from the delay profile and the power of the other phases. CD provided with delay profile calculation means for performing
An MA mobile communication receiving device.

FIG. 2 shows a CD according to a second embodiment of the present invention.
FIG. 2 shows a block diagram of an MA mobile communication receiving device. In FIG. 2, reference numeral 201 denotes a moving average time control unit that inputs a delay profile and outputs a moving average time. The same elements as those of the CDMA mobile communication receiving apparatus according to Embodiment 1 shown in FIG. 1 are denoted by the same reference numerals, and redundant description will be omitted.

The operation of the CDMA mobile communication receiving apparatus configured as described above will be described. Moving average time control means 20
1 obtains a ratio between the power of the selected path phase and the power of the power other than the selected path phase from the delay profile and the selected path phase, and determines and outputs the moving average time based on the ratio.
When the reception SIR is small, the level of noise and interference is high, so that the above-described power ratio becomes small. Therefore, by increasing the averaging time in order to increase the effect of suppressing these noises and interference, the synchronization acquisition / tracking ability is enhanced.
However, if a sufficient SIR is obtained, it is desirable that the averaging time be shortened to follow the timing fluctuation of the path.

Therefore, the moving average time control means 201
Calculates the power of the selected path phase from the delay profile,
This is set as the desired signal power, and the power other than the selected path phase is averaged to obtain the interference signal power. The obtained ratio between the desired signal power and the interference signal power is constantly observed, and when the ratio is small, the moving average time is lengthened, and when the ratio is large, the moving average time is shortened. By performing such control, a delay profile can be obtained with an optimal moving average time according to the fluctuation of the reception SIR. for that reason,
In the synchronization acquisition / tracking means 104, the path phase can be obtained more accurately, and the synchronization acquisition / tracking performance is improved.

As described above, according to the second embodiment of the present invention, the delay profile calculating means for performing the moving average according to the input moving average time, and the power of the selected path phase obtained from the delay profile Moving average time control means for controlling the moving average time in accordance with the ratio of the power of the other phases and the power of the other phases, and controlling the moving average time of the delay profile, allows the noise and noise of the delay profile to be reduced even if the reception SIR is reduced. Since the interference level can be suppressed, the synchronization acquisition / tracking performance is improved.

(Third Embodiment) A third embodiment of the present invention is directed to a CDMA system provided with a delay profile calculating means for performing a moving average with a moving average time according to reception quality information obtained at the time of data demodulation. It is a mobile communication receiving device.

FIG. 3 shows a CD according to the third embodiment of the present invention.
FIG. 2 shows a block diagram of an MA mobile communication receiving device. In FIG. 3, reference numeral 301 denotes moving average time control means for inputting reception quality information and outputting a moving average time. Reference numeral 302 denotes a data demodulation unit that inputs a despread baseband signal and outputs received data and reception quality information. The same elements as those of the CDMA mobile communication receiving apparatus according to Embodiment 1 shown in FIG. 1 are denoted by the same reference numerals, and redundant description will be omitted.

The operation of the CDMA mobile communication receiving apparatus configured as described above will be described. Moving average time control means 30
1 determines and outputs a moving average time based on the input reception quality information. When the reception quality is poor, if the averaging time is increased in order to increase the noise and interference suppression effect, the synchronization acquisition / tracking ability is enhanced. However, when sufficient reception quality is obtained, it is desirable to shorten the averaging time so as to follow the timing fluctuation of the path. Therefore, the moving average time control means 301
, Based on the input reception quality information, performs control such that the moving average time is lengthened when the reception quality is poor, and the moving average time is shortened when the reception quality is good. By performing such control, a delay profile can be obtained with an optimal moving average time according to the fluctuation of the reception quality. Therefore, the synchronization acquisition / tracking means 104 can more accurately determine the path phase, and the synchronization acquisition / tracking performance is improved.

Data demodulation means 302 RAKE-combines the despread baseband signal and outputs received data. With this data demodulation, for example, SIR or FE
Information indicating reception quality such as R is obtained. The SIR can be obtained as a ratio between the power of the received signal and its variance after detection. The FER can be obtained by performing error detection at the time of data demodulation by encoding the data for error detection. By using the thus obtained reception quality information as a parameter for determining the moving average time by the moving average time control means 301 as described above, the synchronization acquisition / tracking performance is improved.

As described above, according to the third embodiment of the present invention, moving average time control means for controlling the moving average time according to the reception quality information obtained at the time of data demodulation, and data demodulation. Also, by providing a data demodulation means for obtaining the reception quality and controlling the moving average time of the delay profile, the noise / interference level of the delay profile can be suppressed even if the reception quality is reduced, so that the synchronization acquisition / tracking performance is improved. .

(Fourth Embodiment) In a fourth embodiment of the present invention, the number of selected paths for switching timings is
This is a CDMA mobile receiver provided with synchronization acquisition / tracking means for controlling according to reception quality information.

FIG. 4 shows a CD according to a fourth embodiment of the present invention.
FIG. 2 shows a block diagram of an MA mobile communication receiving device. In FIG. 4, reference numeral 401 denotes a synchronization acquisition / tracking unit that inputs a delay profile and reception quality information and outputs a selected path phase. 402 inputs the despread baseband signal,
Data demodulation means for outputting received data and received quality information. The same elements as those of the CDMA mobile communication receiving apparatus according to Embodiment 1 shown in FIG.
Duplicate description is omitted.

The operation of the CDMA mobile communication receiving apparatus configured as described above will be described. Synchronous acquisition / tracking means 401
Controls the number of switching of the N selected path phases assigned to the fingers based on the reception quality information, and outputs the selected path phases. The synchronization acquisition / tracking unit 401 outputs the path phases of the upper N values of the observed delay profile as selected path phases to be assigned to fingers in the data demodulation despreading unit. However, when noise or interference is large, a phase having a large correlation value appears in the delay profile due to the influence of the noise or interference, so that an erroneous path phase may be selected. Therefore, while data demodulation is being performed with acceptable quality, even if other peaks appear in the delay profile, by not switching the path phase, the possibility of selecting the wrong path phase is reduced. it can. That is, in synchronization acquisition / tracking means 401, according to the input reception quality information, the number of selected path switching is increased when reception quality is poor, and the number of selected path switching is decreased or reception path switching is performed when reception quality is good. Control not to be. By performing such control, the synchronization acquisition / tracking performance can be improved.

Data demodulation means 402 RAKE-combines the despread baseband signal and outputs received data. With this data demodulation, for example, SIR or FE
Information indicating reception quality such as R is obtained. The SIR can be obtained as a ratio between the power of the received signal and its variance after detection. The FER can be obtained by performing error detection at the time of data demodulation by encoding the data for error detection. By using the reception quality information thus obtained as a parameter for determining the number of selected path switching by the synchronization acquisition / tracking means 401 as described above, the synchronization acquisition / tracking performance is improved.

As described above, according to the fourth embodiment of the present invention, the synchronization acquisition / tracking means for controlling the number of selected paths for switching the timing in accordance with the reception quality information, the data demodulation and the reception quality By providing a data demodulation means for determining the path switching frequency according to the fluctuation of the reception quality, it is possible to reduce the possibility of selecting the wrong path phase from the delay profile. improves.

[0039]

As described above, according to the present invention, a delay profile calculating means for performing a moving average according to an input moving average time, and a moving average for controlling a moving average time according to a timing variation of a selected path. Providing time control means,
By controlling the moving average time of the delay profile, even if there is a sudden change in the selected path timing due to the high-speed movement of the communication device, the path movement can follow the change, so that the CDMA mobile body with excellent synchronization acquisition and tracking performance. A communication receiving device can be realized.

Further, according to the present invention, the delay profile calculating means for performing a moving average according to the input moving average time, and the ratio between the power of the selected path phase obtained from the delay profile and the power of the other phases. By providing a moving average time control means for controlling the moving average time in response to the moving average time of the delay profile, the noise level and the interference level of the delay profile can be suppressed even if the reception SIR is reduced. A CDMA mobile communication device having excellent tracking performance can be realized.

Further, according to the present invention, there are provided moving average time control means for controlling a moving average time in accordance with reception quality information obtained at the time of data demodulation, and data demodulation means for performing data demodulation and obtaining reception quality. By controlling the moving average time of the delay profile, it is possible to realize a CDMA mobile communication device having excellent synchronization acquisition / tracking performance capable of suppressing the noise / interference level of the delay profile even if the reception quality is reduced.

Further, according to the present invention, there are provided synchronization acquisition / tracking means for controlling the number of selected paths for switching timing in accordance with reception quality information, and data demodulation means for performing data demodulation and obtaining reception quality. By controlling the frequency of path switching in accordance with the variation in reception quality, a CDMA mobile communication device having excellent synchronization acquisition / tracking performance with a low possibility of selecting an erroneous path phase from a delay profile can be realized. .

[Brief description of the drawings]

FIG. 1 is a block diagram of a CDMA mobile communication receiving apparatus according to Embodiment 1 of the present invention;

FIG. 2 is a block diagram of a CDMA mobile communication receiving apparatus according to Embodiment 2 of the present invention;

FIG. 3 is a block diagram of a CDMA mobile communication receiving apparatus according to Embodiment 3 of the present invention;

FIG. 4 is a block diagram of a CDMA mobile communication receiving apparatus according to Embodiment 4 of the present invention.

FIG. 5 is a block diagram of a conventional CDMA mobile communication receiver.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 wireless receiving means 2 synchronization despreading means 3 delay profile calculating means 4 threshold switching means 5 synchronization acquisition / tracking means 6 data demodulation despreading means 7 data demodulation means 101 wireless receiving means 102 synchronization despreading means 103 delay Profile calculation means 104 Synchronization acquisition / tracking means 105 Moving average time control means 106 Data demodulation despreading means 107 Data demodulation means 201 Moving average time control means 301 Moving average time control means 302 Data demodulation means 401 Synchronization acquisition / tracking means 402 Data Demodulation means

Claims (4)

[Claims] 1. A radio receiving means for inputting a received carrier signal and outputting a baseband spread signal, a despreading means for synchronization for inputting the baseband spread signal and outputting a correlation value, and an input moving average Delay profile calculation means for moving and averaging the correlation value according to time and outputting a delay profile; synchronization acquisition and tracking means for inputting the delay profile and outputting a selected path phase; and timing fluctuation of the selected path phase A moving average time control means for outputting a moving average time according to the above to the delay profile calculation means, and a data demodulation inverse which inputs the baseband spread signal and the selected path phase and outputs a despread baseband signal. Spreading means, and a data demodulation means for receiving the despread baseband signal and outputting received data. CDMA mobile communication receiver. 2. A radio receiving means for inputting a received carrier signal and outputting a baseband spread signal; a despreading means for synchronization for inputting the baseband spread signal and outputting a correlation value; A delay profile calculating unit that outputs a delay profile by moving average of the correlation value according to time, a synchronization acquisition / tracking unit that inputs the delay profile and outputs a selected path phase, and a power of the selected path phase. A moving average time control means for outputting a moving average time according to a ratio to power of another phase to the delay profile calculation means, and a baseband despread by inputting the baseband spread signal and the selected path phase A data demodulation despreading means for outputting a signal; and a data demodulation means for receiving the despread baseband signal and outputting received data. A CDMA mobile communication receiver. 3. A radio receiving means for inputting a received carrier signal and outputting a baseband spread signal; a despreading means for synchronization for inputting the baseband spread signal and outputting a correlation value; Delay profile calculation means for moving average of the correlation value according to time and outputting a delay profile, synchronization acquisition / tracking means for inputting the delay profile and outputting a selected path phase, and reception obtained at the time of data demodulation Moving average time control means for outputting a moving average time according to quality information to the delay profile calculating means, and data demodulation for inputting the baseband spread signal and the selected path phase and outputting a despread baseband signal Despreading means for inputting the despread baseband signal, outputting received data and demodulating data to obtain reception quality C provided with means
DMA mobile communication receiver. 4. A radio receiving means for inputting a received carrier signal and outputting a baseband spread signal, a synchronization despreading means for inputting the baseband spread signal and outputting a correlation value, and moving the correlation value A delay profile calculating means for outputting a delay profile on average, and controlling the number of selected paths for switching timing according to reception quality information obtained at the time of data demodulation, and inputting the delay profile to output a selected path phase. Synchronization acquisition / tracking means, data demodulation despreading means for inputting the baseband spread signal and the selected path phase and outputting a despread baseband signal, and inputting the despread baseband signal A data demodulating means for outputting received data and obtaining reception quality by using the CD.
MA mobile communication receiver.