JP2001168780A - Diversity reception device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce influence to reception characteristics due to a RAKE synthesis error caused by the adjusting error and the quantization error of AGC characteristics without the need for adjustment of the AGC characteristics with respect to respective space branches. SOLUTION: In AGC control parts 100A and 100B, a reception signal is amplified by AGC amplifiers 3A and 3B and is converted into the orthogonal base band signals of I and Q by the orthogonal detectors 101 of orthogonal demodulation parts 4A and 4B. The base band signals are channel-selected by LPF 102A and 102B and are converted by A/D converters 103A and 103B. In the reception signal envelope level computing elements 104 of the AGC parts 5A and 5B, a reception signal envelope level is obtained. In an AGC control voltage generation circuit 105, the A/D converters 103A and 103B generate AGC control voltage. Thus, the gains of the AGC amplifiers 3A and 3B can optimally be controlled by AGC control voltage.

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 affected by fading, and particularly to a direct spread single code division multiple access system (DS-CDMA), which can achieve both effects of space diversity and path diversity. The present invention relates to a diversity receiver that can be obtained.

[0002]

2. Description of the Related Art Generally, in land mobile communication, reception performance is degraded due to fading caused by multi-wave interference. In order to reduce the influence of the fading, a diversity reception system that performs reception using a plurality of branches independent of space, polarization, angle, frequency, or time is used. In a direct spread single code division multiple access (hereinafter referred to as DS-CDMA) cellular system, a plurality of communication users perform communication using the same frequency band, and each user is identified by a spreading code. Done by In the DS-CDMA system, band spreading is performed with a spreading code of a very high rate for an information rate to be actually transmitted. Due to the correlation characteristic of the spreading code, it is possible to separate and extract each delay multiplex wave (multipath) having a different propagation delay time.

In a receiving apparatus of the DS-CDMA system, multipath signals (multipath signals) having different propagation delay times are despread to separate paths, and each path is selected in the order of higher reception level. Perform RAKE synthesis. That is,
This RAKE receiving method is a maximum ratio combining method to which path diversity is applied. Consider a case in which a space diversity system is combined with the DS-CDMA receiver. As described above, in the DS-CDMA system, since the same frequency is used between cells and sectors, the SIR (desired signal power vs. interference power) is smaller than the magnitude of the envelope level of the received signal in each space branch.
The size is important. Further, in an actual land mobile communication environment, since there are downlink signals from cells and sectors different from the sector with which communication is being performed, the SIR of the received signal in each space branch is considered to be different. .

[0004] As described above, the following two methods are conceivable for performing RAKE combining by applying the space diversity system to the receiving apparatus of the DS-CDMA system. Gain control is performed so that each space branch has a common equal gain, and after despreading, RAKE combining is performed. Gain control is independently performed on each space branch under predetermined conditions, and after despreading, gain correction is performed and RAKE combining is performed.

[0005] First, FIG. 5 shows a block diagram of a basic configuration of a conventional example of a receiving apparatus in the above case (here, the case where the number of branches is two is shown). In this receiver,
Signals (analog signals) received by the two antennas 1A and 1B are subjected to high-frequency amplification, frequency conversion, and channel selection in the receiving units 2A and 2B, and are subjected to AGC amplifiers 3A and 3A.
3B. The amplified signal is output to the quadrature demodulation unit 4
A and 4B convert the signal into two orthogonal baseband signals (digital signals). In the AGC unit 5, for the A / D converters in the quadrature demodulation units 4A and 4B, the reception signal having the larger envelope level of the reception signal among the two branches always has the optimum dynamic range. West,
At the same time, the AGC amplifiers 3A and 3B are controlled so that the two branches have a common equal gain. Quadrature demodulation unit 4
The signals quantized in A and 4B are path-diversified in the respective finger processing units 6A and 6B. Thereafter, the RAKE combining unit 7 performs maximum ratio combining to obtain S
Output to IR estimation section 8 and decoding section 9.

As a configuration of the receiving apparatus in the following case, Japanese Patent Application Laid-Open No. H11-55169 proposes a "maximum ratio combining method and a diversity receiving apparatus using the maximum ratio combining method". FIG. 6 shows a block diagram as an example of the configuration of this receiving apparatus (here, the case where the number of branches is two is shown). In the receiving device in this case, signals (analog signals) received by the two antennas 1A and 1B are subjected to high-frequency amplification, frequency conversion, and channel selection in the receiving units 2A and 2B, and the AGC amplifier 3A. ,
The signal is input to the quadrature demodulation units 4A and 4B through 3B. The amplified signal is converted into two orthogonal baseband signals (digital signals) by quadrature demodulation units 4A and 4B.
The AGC units 5A and 5B generate a gain control signal based on the baseband signal in each branch. The gain control circuit 10 controls the AGC amplification gain of the other branch to be a power of 2 based on the gain control signals from the AGC units 5A and 5B, using the AGC amplification gain of one branch as a reference gain. At the same time, it controls the gain correction bit shifters 11A and 11B for performing gain correction between branches in accordance with the power of two. The baseband signal is despread by the finger processing unit 6A and gain-corrected by the gain correction bit shifters 11A and 11B. Thereafter, the RAKE combining unit 7 combines the signals at the maximum ratio,
It is output to the R estimation unit 8 and the decoding unit 9.

[0007]

However, the above two conventional examples have the following problems. First, in the case of the conventional example, this is a precondition that common gain control is performed for each space branch. It's AG in each space branch
Since the accuracy of the C characteristic is required, fine adjustment of the AGC characteristic is required for each space branch. In a cellular portable device or the like, usually, a fixed gain is set between antennas in each space branch in order to reduce the size of the device such that one antenna is a whip antenna and the other antenna is a built-in antenna. That makes a difference. For this reason, if the difference between the averaging gains of the antennas is large to some extent, the effect of the space diversity cannot be fully utilized, and in an extreme case, it is equivalent to the case of single branch reception.

Next, in the case of the conventional example, the gain is set so that the AGC amplification gain of one of the space branches is a power of 2 based on the AGC amplification gain of the other branch. Can control the
It is a prerequisite. Therefore, as in the case of the conventional example, the AGC characteristic for each space branch is
It is necessary to make fine adjustments for each.

Normally, the A / D converters in the quadrature demodulators 4A and 4B need to perform quantization with an optimal dynamic range in order to cope with an instantaneous value fluctuation due to fading. However, in the case of the conventional example, in order to perform the gain correction by the bit shift, it is important to emphasize that the AGC gain control in each space branch always becomes a power of 2 as described above. For A / D converters in 4A and 4B,
It becomes difficult to always perform quantization with the optimal dynamic range, and the accuracy of the subsequent finger processing and RAKE combining processing deteriorates.

In the DS-CDMA cellular system, transmission power control based on reception quality is essential for solving the near-far problem. Therefore, in the transmission power control, transmission is performed with a minimum necessary power according to the traffic fluctuation in the cell based on the reception SIR measurement value. That is, the accuracy of the SIR estimated value in the mobile device is important for reducing the power consumption of the mobile device and increasing the cell capacity. On the other hand, as described above, when RAKE combining is performed on received signals of each space branch in the related art at once, a RAKE combining error due to an AGC characteristic adjustment error or a quantization error of each space branch occurs. I will.
Therefore, the SIR estimation value calculated using the RAKE combined reception signal similarly includes an error.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has been made in consideration of the case where RAKE combining is performed by applying a space diversity system in the DS-CDMA system.
It is not necessary to finely adjust the AGC characteristic for each space branch, and by performing quantization with an optimum dynamic range for each space branch, the adjustment error and the quantization of the AGC characteristic for each space branch are performed. An object of the present invention is to provide a diversity receiving apparatus that reduces the influence on the reception characteristics due to RAKE combining errors caused by errors.

[0012]

The first invention is a DS-C.
In a diversity receiver that performs RAKE reception by applying a space diversity system to a receiver of a DMA system, an AGC amplifier that amplifies a received signal for each space branch, A quadrature detector for converting the signals into I and Q baseband signals, an LPF for channel selection, an A / D converter for quantizing the I and Q signals, and an output signal of the A / D converter. A received signal envelope level calculator for calculating the received signal envelope level of each space branch, and the predetermined A and the received signal envelope level determined by the calculation.
And an AGC control voltage generation circuit for comparing a reference reception signal envelope level, which is an optimum input level of the / D converter, with a reference voltage and generating a control voltage according to the comparison result. Then, the control voltage of the AGC control voltage generation circuit is set at a stage preceding the quadrature detector of each space branch so that the received signal envelope level at the input of the A / D converter in each space branch is optimized. Each of the placed AGC amplifiers is controlled.

A second aspect of the present invention is to apply a space diversity scheme to a DS-CDMA receiving apparatus and to rake it.
In a diversity receiving apparatus that performs reception, a quadrature detector that converts a received signal into I and Q baseband signals that are orthogonal to each other, a baseband AGC amplifier that variably amplifies the gain of the I and Q signals, LPF
An A / D converter for performing quantization of I and Q signals;
A received signal envelope level calculator for calculating the received signal envelope level of each space branch using the output signal of the / D converter, and a predetermined received signal envelope level which is the optimum input level of the converter of A. An AGC control voltage generation circuit for comparing with a line level and generating a control voltage according to the comparison result. The A / D in each space branch is controlled by the control voltage of the AGC control voltage generation circuit.
A baseband AGC amplifier placed downstream of the quadrature detector in each space branch is controlled so that the received signal envelope level at the input of the converter is optimized.

According to a third aspect of the present invention, the reception envelope level calculator performs an averaging process on the output signal of each of the A / D converters at time intervals that can be arbitrarily set. It is characterized by.

A fourth aspect of the present invention is to measure the synchronization delay of each path and the received signal level of each space branch by measuring the averaged delay profile of the received signal of each space branch which has been optimally quantized. A tracking finger processing unit that performs synchronous tracking independently for each path based on phase information from the search finger processing unit and performs coherent detection for each space branch; Search and path search for dynamic path search and path selection
It is characterized by comprising a path selection unit and a RAKE combining unit that performs RAKE combining so that maximum ratio combining is independently performed for each space branch.

A fifth aspect of the present invention is characterized in that the path search and path selector can perform processing in a time-series manner.

According to a sixth aspect of the present invention, there is provided an SIR estimator for measuring an SIR of each space branch using an output reception signal of the RAKE combiner for each space branch, and an SIR estimator for each space branch. The RAKE for each space branch based on the SIR estimate
A maximum ratio combining unit that combines the output reception signals of the combining units with a maximum ratio, wherein the maximum ratio combining unit combines the RAKE combined reception signals of the respective space branches with the maximum ratio and outputs the signals to the decoding unit. And

According to a seventh aspect of the present invention, there is provided an SIR estimator for measuring an SIR of each space branch using an output reception signal of the RAKE combiner for each space branch, and an SIR estimator for each space branch. A branch selector for comparing the SIR estimation value and selecting a space branch having the best SIR estimation value, wherein the branch selection unit outputs a RAKE combined reception signal of the selected space branch to a decoding unit. It is characterized by the following.

According to an eighth aspect of the present invention, the SIR estimating unit includes an SI
The averaging time for performing the R calculation can be set arbitrarily.

In the case where the space diversity system is applied to the DS-CDMA system receiver to perform RAKE combining, two types of multipath fading in a mobile communication environment are frequency flat fading and frequency selective fading. Need to be considered. In general, there is a space diversity receiving method as an effective method for frequency flat fading.
As a method that is effective for frequency-selective fading, a RAKE reception method that provides path diversity can be given.

Based on the above, the present invention independently performs AGC and performs RAKE reception so that optimal quantization can be performed in each space branch.
By giving an effect on frequency-selective fading and estimating the SIR for each space branch, and performing a maximum ratio combining of the RAKE combined received signal for each space branch based on the respective SIR estimation values, It has an effect on frequency flat fading. Further, in the present invention, in order to reduce the circuit scale, the RAKE combined reception signal of the branch having the best SIR estimation value among the space branches may be selected after detection.
Similarly, it has an effect on frequency flat fading.

That is, the principle of the present invention is that each space branch is considered as an independent single-branch receiving apparatus, and data decoding is performed by maximal-ratio combining or selective combining of received signals of a branch having a good reception state. This makes it possible to avoid the effect of a RAKE combining error that occurs by collectively performing RAKE reception of each space branch, and to achieve RAK using a space diversity system.
This is based on the idea that the effects of E-synthesis can be effectively obtained.

[0023]

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

As a first embodiment of the present invention, a description will be given of a DS-CDMA type receiving apparatus that performs RAKE reception by applying a space diversity system.
FIG. 1 is a block diagram showing a first embodiment of a diversity receiving apparatus according to the present invention (here, the case where the number of branches is two is shown). FIG. 2 is a block diagram illustrating an AGC control unit according to the first embodiment.

In FIG. 1, the same parts as those of the conventional diversity receiving apparatus are denoted by the same reference numerals. The diversity receiver shown in FIG. 1 includes antennas 1A and 1B, and receivers 2A and 2A.
2B, AGC control units 100A and 100B, search finger processing units 12A and 12B, tracking finger processing units 13A and 13B, and path search and path selection unit 14.
, RAKE combining sections 7A and 7B, and SIR estimating section 8A,
8B, a maximum ratio combining unit 15 and a decoding unit 9. The AGC control units 100A and 100B are configured by AGC amplifiers 3A and 3B, quadrature demodulation units 4A and 4B, and AGC units 5A and 5B. As shown in FIG.
The quadrature demodulators 4A and 4B are composed of a quadrature detector 101 and an LPF
102A, 102B and A / D converters 103A, 103
B, the AGC units 5A and 5B include a reception signal envelope level calculator 104 and an AGC control voltage generation circuit 105.
Consists of The tracking finger processing unit 13
A and 13B have a configuration including despreading units 17A and 17B and coherent detection units 18A and 18B.

Now, the operation of the diversity receiver will be described. The high-frequency signals received by the two antennas 1A and 1B are subjected to high-frequency amplification, frequency conversion, and channel selection in the receiving units 2A and 2B, respectively.
The signals are input to the GC control units 100A and 100B.

In the AGC control units 100A and 100B, received signals are amplified by AGC amplifiers 3A and 3B.
The signals are input to the quadrature demodulation units 4A and 4B. Then, the signals are converted into orthogonal I and Q baseband signals by the orthogonal detectors 101 of the orthogonal demodulators 4A and 4B. afterwards,
The I and Q baseband signals are respectively LPF 102
A, 102B, the channel is selected, and the A / D converter 1
03A and 103B, the data is converted into digital data, and is converted into digital data.
A, 13B and the AGC units 5A, 5B. The I and Q baseband signals converted into digital data are represented by A
Received signal envelope level calculator 104 of GC units 5A and 5B
Performs the following digital signal processing.

In the received signal envelope level calculator 104,
When calculating the envelope level of the received signal, an averaging process is performed in order to remove the influence of the instantaneous value level of the reception envelope that has a Rayleigh distribution due to fading. Then, digital processing for obtaining the reception signal envelope level using the averaging time as a parameter is performed.

In the AGC control voltage generation circuit 105 of the AGC units 5A and 5B, the A / D converters 103A and 103B determine a predetermined reference reception signal envelope level value so as to obtain an optimum input level. And the received signal envelope level calculated by the received signal envelope level calculator 104 to generate an AGC control voltage corresponding to the comparison result. With this AGC control voltage, the quadrature detector 1
01, the gain of the AGC amplifiers 3A and 3B is controlled, and the received signal envelope level at the input of the A / D converters 103A and 103B is always kept at the optimum level for performing quantization. Works like that. As shown in FIG. 1, since the operations of the AGC control units 100A and 100B described above are performed independently for each space branch, signals received in each space branch are quantized with an optimum dynamic range. Is performed.

Subsequently, the received signal in each space branch, which has been subjected to the optimal quantization, is output to the search finger processing unit 1.
At 2A and 12B, the averaged delay profile is measured, and synchronization acquisition of each path within the search range and detection of the received signal level are performed. Generally, in a land mobile communication environment, each path on the delay profile is subject to instantaneous fluctuations due to Rayleigh fading, so that it is necessary to average the received signal level of each path in order to remove the influence. In order for the search finger processing units 12A and 12B to follow a delay profile that fluctuates at a high speed and not to reduce the path search range time and the averaging time of the received signal level of each path, the correlation peak is calculated in real time. This can be realized by using a matched filter that can detect.

Here, the search finger processing units 12A, 12
The path search range and the path to be RAKE-combined in B are selected dynamically by the path search and path selection unit 14 for each space branch. Further, the path search & path selection unit 14 performs the above processing in a time series for each space branch, thereby reducing the circuit scale.

Tracking finger processing units 13A, 13
In B, the following processing is performed. In the despreading units 17A and 17B, synchronization tracking is performed by a DLL (Delay Locked Loop) circuit based on the phase information from the search finger processing units 12A and 12B, and despreading is performed. Coherent detector 1
8A and 18B, the phase information subjected to the despreading process uses a known reference signal such as a pilot signal.
Synchronous detection is performed for each path.

As described above, the reception signals detected by the N tracking finger processing units 13A and 13B are converted into RAKE signals for each space branch.
The signals are sent to the combining units 7A and 7B, and are subjected to RAKE combining processing so as to achieve maximum ratio combining.

Next, the SI for each space branch
The R estimators 8A and 8B calculate the SIR estimation value of each space branch using the output signals of the RAKE combiners 7A and 7B for each space branch.
The SIR estimating units 8A and 8B can arbitrarily set the averaging time for performing the SIR calculation.

Subsequently, in the maximum ratio combining section 15, as described above, the received signal RAKE-combined for each space branch is subjected to a maximum ratio combining process based on the SIR estimated value obtained for each space branch. Is done. Then, the decoding unit 9 performs a decoding process including error correction and the like on the received signal on which the maximum ratio combining process has been performed.

As described above, in the configuration of the block diagram shown in FIG. 1, by performing the series of operations described so far,
The received signal can be quantized with an optimum dynamic range for each space branch without requiring fine adjustment of the AGC characteristic for each space branch. Further, since the RAKE-combined reception signals of the respective space branches are maximum-ratio-combined based on the SIR estimation values of the respective space branches, a problem arises when the conventional reception signals of the respective space branches are collectively RAKE-combined. It is possible to reduce the deterioration of the reception performance due to the RAKE combining error caused by the AGC characteristic adjustment error and the quantization error of each space branch.

Next, as a second embodiment of the present invention, a space diversity system is applied to
A DS-CDMA receiving apparatus that performs reception will be described. FIG. 3 is a block diagram showing a second embodiment of the diversity receiver according to the present invention. The configuration of the second embodiment is the same as that of the first embodiment except that a branch selecting unit 16 is provided instead of the maximum ratio combining unit 15, as is apparent from a comparison between the block diagrams of FIGS. This is the same configuration as the configuration of the embodiment. That is, in the second embodiment, as described above in the first embodiment, AGC control is performed independently so that each received signal is optimally quantized in each space branch. RAKE combining is performed to estimate the SIR for each space branch.

Subsequently, the subsequent operation will be described with reference to FIG. The branch selection unit 16 compares the SIR estimation values for each space branch from the SIR estimation units 8A and 8B, and selects the space branch with the best SIR estimation value. Then, the branch selector 16 outputs the selected RAKE combined received signal to the decoder 9. In the decoding unit 9, as in the first embodiment, the selected RA
A decoding process including error correction and the like is performed on the KE synthesized reception signal.

In the second embodiment, unlike the first embodiment, a RAKE combined reception signal in each space branch is selected after detection, so that the diversity reception combining method in the first embodiment is different from that of the first embodiment. The receiving performance is inferior to the case of the maximum ratio combining method described above. However, in terms of reducing the circuit scale, there is an advantage that the configuration can be simplified as compared with the first embodiment.

Further, by performing the above-described operation in the configuration of the block diagram of FIG. 3, similarly to the first embodiment, it is possible to reduce the degradation of the reception performance caused by the RAKE combining error in the conventional system. On the other hand, an effect can be obtained.

The first and second embodiments have been described on the premise of a superheterodyne system, which is generally used as a wireless unit system. However, the present invention can be sufficiently applied even when the direct conversion method is applied to the wireless unit. The third embodiment is a diversity receiving apparatus when a direct conversion system is applied to a wireless unit.

FIG. 4 is a block diagram showing the configuration of the AGC control unit in the third embodiment of the diversity receiver according to the present invention. In the block diagram of FIG. 2 described above,
AGC amplifier 3 in the IF band before the quadrature detector 101
A and 3B are arranged. However, in the block diagram of FIG. 4, baseband AGC amplifiers 106A and 106B are arranged for I and Q respectively at the subsequent stage of quadrature detector 101. That is, the only difference is the block configuration of whether to perform the gain control process using the AGC control voltage in the IF band or the baseband. The overall operation of the AGC control unit is the same as that of FIG. The same is true.

As described above, the diversity receiving apparatus according to the present invention can be applied without being limited to the wireless section system.

[0044]

As described above, in the diversity receiver according to the present invention, the AG is applied to each space branch.
No fine adjustment of the C characteristics is required. Therefore, in the case of mass-producing the portable wireless device to which the present invention is applied, the time of the adjustment process in the mass production line can be shortened, and the productivity of the product can be improved, which is very practical.

In the diversity receiving apparatus according to the present invention, AGC is independently applied to the received signal for each space branch so that an optimum dynamic range is obtained, and R
Since AKE synthesis is performed, the SIR
The error of the estimated value can be reduced. That is, the present invention is also effective in reducing the power consumption of the mobile device and increasing the cell capacity.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a diversity receiving apparatus according to the present invention.

FIG. 2 is a block diagram illustrating an AGC control unit according to the first embodiment.

FIG. 3 is a block diagram showing a second embodiment of the diversity receiver according to the present invention.

FIG. 4 is a block diagram illustrating a configuration of an AGC control unit in a third embodiment of the diversity receiver according to the present invention.

FIG. 5 is a block diagram showing a basic configuration of a conventional diversity receiving apparatus.

FIG. 6 is a block diagram showing another basic configuration of a conventional diversity receiving apparatus.

[Explanation of symbols]

 1A, 1B Antenna 2A, 2B Receiving unit 3A, 3B AGC amplifier 4A, 4B Quadrature demodulating unit 5A, 5B AGC unit 7A, 7B RAKE combining unit 8A, 8B SIR estimating unit 9 Decoding unit 12A, 12B Search finger processing units 13A, 13B Tracking finger processing unit 14 Path search & path selection unit 15 Maximum ratio combining unit 16 Branch selection unit 17A, 17B Despreading unit 18A, 18B Coherent detection unit 100A, 100B AGC control unit 101 Quadrature detector 102A, 102B LPF for channel selection 1023A , 103B A / D converter 104 Reception envelope level calculator 105 AGC control voltage generation circuit 106A, 106B Baseband AGC amplifier

Claims (8)

[Claims] 1. A diversity receiver for performing RAKE reception by applying a space diversity scheme to a DS-CDMA receiver, an AGC amplifier for amplifying a received signal for each space branch, A quadrature detector for converting the obtained signals into orthogonal I and Q baseband signals, an LPF for channel selection, an A / D converter for quantizing the I and Q signals, and the A / D A received signal envelope level calculator for calculating a received signal envelope level of each space branch using an output signal of the converter; and the A / D conversion which is determined in advance with the calculated received signal envelope level. An AGC control voltage generation circuit that compares a reference reception signal envelope level that is an optimum input level of the detector with a reference voltage, and generates a control voltage according to the comparison result. The control voltage of the AGC control voltage generation circuit is placed before the quadrature detector of each space branch so that the received signal envelope level at the input of the A / D converter in each space branch is optimized. A diversity receiver for controlling the AGC amplifiers. 2. A quadrature detector for converting a received signal into orthogonal I and Q baseband signals in a diversity receiver for performing RAKE reception by applying a space diversity system to a DS-CDMA receiver. And a baseband AG for variably amplifying the gains of the I and Q signals.
A C amplifier, an LPF for channel selection, an A / D converter for quantizing I and Q signals, and calculating a reception signal envelope level of each space branch using an output signal of the A / D converter. AGC control voltage generation unit for comparing a received signal envelope level calculator which performs the operation with a received signal envelope level which is a predetermined optimum input level of the converter of A and generates a control voltage according to the comparison result And the quadrature detection of each space branch such that the control voltage of the AGC control voltage generation circuit optimizes the received signal envelope level at the input of the A / D converter in each space branch. Baseband A placed at the back of the vessel
A diversity receiver for controlling a GC amplifier. 3. The diversity receiving apparatus according to claim 1, wherein said reception envelope level calculator comprises a plurality of said A / D converters.
A diversity receiving apparatus that performs an averaging process on an output signal of a converter at a time interval that can be arbitrarily set. 4. The diversity receiver according to claim 1, wherein an average delay profile is measured for a reception signal of each space branch on which optimal quantization has been performed, thereby synchronizing each path. A search finger processing unit that detects acquisition and a received signal level for each space branch; and a tracking that independently performs synchronous tracking for each path based on phase information from the search finger processing unit and performs coherent detection for each space branch. A finger processing unit, a path search and path selection unit that dynamically performs a path search and a path selection for each space branch, a RAKE synthesis unit that performs a RAKE synthesis so that maximum ratio synthesis is performed independently for each space branch, A diversity receiver comprising: 5. The diversity receiver according to claim 4, wherein the path search and path selector can perform processing in a time-series manner. 6. The diversity receiver according to claim 4, wherein an SIR estimator for measuring an SIR of each space branch using an output reception signal of the RAKE combiner for each space branch; Based on the SIR estimate from the SIR estimator of
A maximum ratio combining unit that combines the output received signals of the E combining unit with a maximum ratio, wherein the maximum ratio combining unit performs the maximum ratio combining of the RAKE combined received signals of the respective space branches and outputs the combined signal to the decoding unit. Characteristic diversity receiver. 7. The diversity receiver according to claim 4, wherein an SIR estimator for measuring an SIR of each space branch using an output reception signal of the RAKE combiner for each space branch; A branch selector that compares SIR estimates from the SIR estimator and selects a space branch with the best SIR estimate, wherein the branch selector receives the RAKE combination of the selected space branch. A diversity receiver for outputting a signal to a decoding unit. 8. The diversity receiving apparatus according to claim 6, wherein the SIR estimating unit can arbitrarily set an averaging time for performing an SIR operation.