JP2002198881A - Apparatus and method for reception of spread spectrum radio transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spread spectrum radio transmission receiving apparatus which has the function of a RAKE receiver so as to enhance a receiving characteristic, by reducing the influence of delay waves or co-channel interference waves whose delay time is smaller than the tip time width of a diffusion signal. SOLUTION: The spread spectrum radio transmission receiving apparatus is provided with an adaptive antenna 100 and the RAKE receiver 110 to which an output signal from the adaptive antenna is input. In order to improve the receiving characteristic of the receiving apparatus, the receiving apparatus is constituted in such a way that the directivity of the adaptive antenna is controlled so as to reduce the influence of a signal which cannot be dealt by the RAKE receiver. By this constitution, the influence of the co-channel interference waves which cannot be dealt by a RAKE receiving function or the delay waves whose delay time is smaller than the tip time width of the diffusion signal can be reduced, and the receiving characteristics of the receiving apparatus can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spread spectrum (SS) radio transmission receiver used in digital cellular communication and the like, and a receiving method thereof. It is configured so that the influence can be eliminated.

[0002]

2. Description of the Related Art In land mobile communication, there are a plurality of propagation paths (paths) from a transmission point to a reception point, and a received wave is a composite wave of a plurality of waves having different propagation paths. Therefore, the radio waves transmitted from the transmission point at the same time arrive at the reception point after being interfered with each other with a time lag.
To eliminate this effect, spread spectrum wireless transmission uses the characteristics of data spreading to perform path separation, and then combines the separated signals to obtain path combining gain and improve reception characteristics. are doing.

[0003] RAK for eliminating the effects of this multipath
As shown in FIG. 22, a conventional spread-spectrum wireless transmission receiver having an E-receiving function includes a receiving antenna 2201, a high-frequency unit 2202 for converting a signal received by the antenna into a signal in an intermediate frequency band, and an intermediate frequency band. A quadrature detector 2203 for extracting a baseband signal from the signal; and a RAKE receiver 2210 for performing signal processing for removing the effects of multipath. The RAKE receiver 2210 performs despreading on the received signal. 2211; delay adjusters 2211 to 2212-K for adjusting the time delay of the path-separated signal; variable gain amplifiers 2213 to 2213-K for adjusting the amplitude of the signal of each path; It includes a propagation path coefficient control unit 2214 for controlling the amplification factors of the variable amplifiers 2213-1 to 2213 -K, and a RAKE receiving unit addition unit 2215 for combining signals of each path.

In this receiving apparatus, first, a receiving antenna section
The radio wave is received by 2201 and the received signal is
Is converted into a signal in the intermediate frequency band. Quadrature detector
Reference numeral 2203 extracts a baseband signal by performing quadrature detection on the signal in the intermediate frequency band. The baseband signal is despread in despreading section 2211. The despreading unit 2211 correlates the received signal and the spread signal, detects a delay time larger than the chip time width of the spread signal, and corrects the delay time and unnecessary time in the delay adjustment unit 2212-m. Signal removal. The amplitude of the output of the delay adjusting unit 2212-m is adjusted by the variable amplification factor amplifying unit 2213-m for each path m, and the RAKE receiving unit adding unit 2215 performs path combining. The propagation path coefficient control unit 2214 controls the amplification factor of the variable amplification factor amplification unit 2213-m of each path based on the output of the despreading unit 2211.

[0005]

However, in the RAKE receiving section of the conventional spread spectrum radio transmission receiver, signal processing corresponding to multipath is performed based on the despread signal, so that the delay time is spread. Although a process corresponding to a delayed wave larger than the chip time width of a signal can be performed, a process corresponding to a delayed wave smaller than the chip time width cannot be performed.

The spread spectrum radio transmission receiver basically has the property that the smaller the co-channel interference wave (including inter-station interference), the better the reception characteristics. Must be removed.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and a RAKE receiver capable of improving the reception characteristics by reducing the influence of a delayed wave smaller than the chip time width of a spread signal or co-channel interference wave. It is an object of the present invention to provide a spread spectrum wireless transmission receiver having a function and a method of receiving the same.

[0008]

SUMMARY OF THE INVENTION Therefore, according to the present invention, there is provided a spread spectrum radio transmission receiving apparatus comprising an adaptive antenna and a RAKE receiver for inputting an output signal from the adaptive antenna. In order to improve the reception characteristics of the device, the directivity of the adaptive antenna is controlled so as to reduce the influence of signals that cannot be handled by the RAKE receiver.

Also, a spectrum comprising an adaptive antenna, a despreading means for despreading an output signal from the adaptive antenna, and a RAKE receiver provided with a path combining means for path combining the despread signal. In the spread radio transmission receiver, the directivity of the adaptive antenna is controlled so as to remove the influence of a delayed wave having a delay time smaller than the chip time width of the spread signal in the output signal of the adaptive antenna.

[0010] A spectrum provided with an adaptive antenna, a despreading means for despreading an output signal from the adaptive antenna, and a RAKE receiver provided with a path combining means for path combining the despread signal. In the spread radio transmission receiver, the directivity of the adaptive antenna is controlled so as to remove the influence of the co-channel interference wave in the output signal of the adaptive antenna.

[0011] A spectrum comprising an adaptive antenna, a despreading means for despreading an output signal from the adaptive antenna, and a RAKE receiver provided with a path combining means for path combining the despread signal. In the spread radio transmission receiver, the directivity of the adaptive antenna is controlled so that the output signal of the adaptive antenna removes the influence of the delayed wave whose delay time is smaller than the chip time width of the spread signal and the influence of the co-channel interference wave. It is configured to be.

[0012] Also, a spread spectrum radio transmission receiving apparatus comprising a plurality of adaptive antennas, despreading means for despreading an output signal from the adaptive antenna, and path combining means for path combining the despread signal. , The directivity of the adaptive antenna is controlled so as to improve the characteristics of the signal combined by the path combining means.

Also, a spread spectrum radio transmission receiving apparatus comprising a plurality of adaptive antennas, a despreading means for despreading an output signal from the adaptive antenna, and a path combining means for path combining the despread signal. , The directivity of the adaptive antenna is controlled so as to remove the influence of a delay wave having a delay time smaller than the chip time width of the spread signal in the output signal of the adaptive antenna.

[0014] Also, a spread spectrum radio transmission / reception apparatus comprising a plurality of adaptive antennas, despreading means for despreading an output signal from the adaptive antenna, and path combining means for path combining the despread signals. , The directivity of the adaptive antenna is controlled so as to remove the influence of the co-channel interference wave in the output signal of the adaptive antenna.

Also, a spread spectrum radio transmission receiving apparatus comprising a plurality of adaptive antennas, despreading means for despreading an output signal from the adaptive antenna, and path combining means for path combining the despread signals. In the output signal of the adaptive antenna, the directivity of the adaptive antenna is controlled so as to remove the influence of the delay wave whose delay time is smaller than the chip time width of the spread signal and the influence of the co-channel interference wave. ing.

Further, in the spread spectrum wireless transmission reception method, a receiving step of receiving radio waves with a plurality of antennas, an amplifying step of amplifying the received signals at different amplification factors, and an addition of adding the amplified signals Process and
A despreading step of despreading the added signal; a path combining step of providing a path to the despread signal by giving a delay time; and the adding to improve the characteristics of the path-combined signal. A spread spectrum wireless transmission reception is performed in the directivity control step of controlling the amplification factor using the obtained signal.

Also, a receiving step of receiving radio waves with a plurality of antennas, an amplifying step of amplifying the received signals at different amplification factors, an adding step of adding the amplified signals, and an adding step of adding the amplified signals A despreading step of despreading
A path combining step of performing path combining by giving a delay time to the despread signal; and an error rate, a signal power to noise power ratio in the path combined signal so as to improve the characteristics of the path combined signal. And a directivity control step of controlling the amplification factor using one of the signal power and (noise power + interference power) to perform spread spectrum wireless transmission reception.

A receiving step of receiving radio waves with a plurality of antennas; a weighting and adding step of amplifying and adding the received signals at different amplification factors; and a despreading step of despreading the weighted and added signals. A path combining step of providing a path delay by giving a delay time to the despread signal, and controlling the amplification factor using the weighted and added signal so as to improve the characteristics of the path combined signal. Spread spectrum wireless transmission reception is performed in the sex control process.

A receiving step of receiving radio waves with a plurality of antennas; a weighting and adding step of amplifying and adding the received signals with different amplification factors; and a despreading step of despreading the weighted and added signals. A path combining step of providing a path to the despread signal by giving a delay time, and an error rate, a signal power to noise power ratio of the despread signal so as to improve the characteristics of the path combined signal. ,
Spread spectrum wireless transmission reception is performed in the directivity control step of controlling the amplification factor using one of the signal power pair (noise power + interference power).

With such a configuration, it is possible to reduce the influence of co-channel interference waves and delay waves whose delay time is smaller than the chip time width of the spread signal, which cannot be handled by the RAKE reception function, and to improve reception characteristics.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A spread spectrum wireless transmission receiver according to a first embodiment includes, as shown in FIG. 1, an adaptive antenna unit 100 for controlling the directivity of a receiving antenna. , A RAKE receiving unit 110,
The adaptive antenna unit 100 includes n reception antenna units 1
01-1 to 101-n, variable gain amplifiers 102-1 to 102-n for adjusting signal levels, adaptive antenna adder 103 for adding signals received by respective antennas, and variable gain amplifier 102 And a directivity control unit 104 for controlling the amplification factors of -1 to 102-n. The RAKE receiving unit 110 includes a despreading unit 111 and a delay adjusting unit 112-1 to 112- like the conventional device.
k, variable amplification factor amplifiers 113-1 to 113-k, a channel coefficient control unit 114, and a RAKE receiving unit adding unit 115.

The adaptive antenna unit 100 includes a reception filter, a reception amplifier, a frequency conversion unit, an intermediate frequency unit, a quadrature detection unit, and the like included in a normal radio transmission reception device. They are not shown to show the basic principle.

This receiving device operates as follows. First, n reception antenna units having different spatial positions
101-1 to 101-n receive radio waves and have a variable amplification factor
1 to 102-n, and each variable gain amplifier 102-i adjusts the amplitude and phase of the received signal for each receiving antenna (branch i) under the control of the directivity control unit 104. Adaptive antenna adder 103 creates the directivity of the antenna by adding the adjusted signals.
The directivity control unit 104 adjusts the variable gain amplifier 102-i so that the effect of a delayed wave having a delay time smaller than the chip time width of the spread signal in the output signal of the adaptive antenna adding unit 103 is minimized, Controls the directivity of the adaptive antenna.

The received signal in which the influence of the delayed wave having a delay time smaller than the chip time width of the spread signal is reduced by the adaptive antenna unit 100 is input to the RAKE receiving unit 110. In RAKE receiving section 110, as in the conventional apparatus, despreading section 111 performs correlation between the received signal and the spread signal, detects a delay time larger than the chip time width of the spread signal, and adjusts delay adjustment section 112. -m corrects the delay time and removes signals at unnecessary times. Variable amplification factor
113-m adjusts the amplitude of the signal for each path output from each delay adjustment unit 112-m, and the RAKE reception unit addition unit 115
These paths are combined. The propagation path coefficient control unit 114 includes:
Based on the output of the despreading unit 111, the amplification factor variable amplification unit 1 of each path
Control the amplification factor of 13-m.

As described above, the spread spectrum wireless transmission receiver according to the first embodiment has an adaptive antenna section.
By providing 100, it is possible to reduce the influence of a delayed wave having a delay time smaller than the chip time width of the spread signal, which cannot be removed by the RAKE receiver.

(Second Embodiment) As shown in FIG. 2, the spread spectrum wireless transmission receiver according to the second embodiment includes an error rate detector 216 for determining an error rate of an output of the RAKE receiver 210. In addition, the directivity control unit 204 of the adaptive antenna unit 200 controls the amplification factors of the variable amplification factor amplification units 202-1 to 202-n based on the error rate detected by the error rate detection unit 216. Other configurations are the same as those of the first embodiment.

In this device, the directivity control unit 204 controls the amplification factor variable amplifier 202-i based on the output of the error rate detection unit 216 so that the error rate of the output signal of the rake reception unit 210 is minimized.
To control the directivity of the adaptive antenna.

As a result, the adaptive antenna unit 200 outputs a received signal in which the influence of the delayed wave having a delay time smaller than the chip time width of the spread signal and the influence of the co-channel interference are reduced. RAKE receiving section 210 performs the same signal processing as in the first embodiment on this signal.

As described above, the spread-spectrum wireless transmission receiver according to the second embodiment has the effect of the delayed wave having a delay time smaller than the chip time width of the spread signal which cannot be removed by the RAKE receiver. The influence of co-channel interference is reduced based on the error rate of the output signal of RAKE receiving section 210.

(Third Embodiment) A spread spectrum wireless transmission receiver according to a third embodiment, as shown in FIG. 3, obtains a signal power to noise power ratio of the output of the RAKE receiver 310. The adaptive antenna unit 300 includes an S / N detection unit 316.
316 based on the output signal 316
-Control the amplification factor of n. Other configurations are the same as those of the first embodiment.

In this device, the directivity control unit 304 controls the S /
Based on the detection output of the N detector 316, the variable gain amplifier 302-i is adjusted so that the signal power to noise power ratio at the output of the RAKE receiving unit 310 is maximized, and the directivity of the adaptive antenna is controlled.

As a result, the adaptive antenna unit 300 outputs a received signal in which the influence of the delayed wave having a delay time smaller than the chip time width of the spread signal and the influence of the co-channel interference are reduced. RAKE receiving section 310 performs the same signal processing on this signal as in the first embodiment.

As described above, the spread spectrum radio transmission receiver according to the third embodiment is affected by the delayed wave having a delay time smaller than the chip time width of the spread signal, which cannot be removed by the RAKE receiver. And the effect of the co-channel interference wave on the S /
Reduce based on N ratio.

(Fourth Embodiment) As shown in FIG. 4, a spread spectrum wireless transmission receiver according to a fourth embodiment has a signal power versus output (noise power + co-channel interference) output of a RAKE receiver 410. An S / (N + I) detection unit 416 for calculating the (power) ratio is provided, and the directivity control unit 404 of the adaptive antenna unit 400 controls the amplification factor variable amplification unit based on the output signal of the S / (N + I) detection unit 416. The amplification factors of 402-1 to 402-n are controlled. Other configurations are the same as those of the first embodiment.

In this device, the directivity control unit 404 controls the S /
Based on the detection output of the (N + I) detector 416, the amplification factor variable amplifier is designed to maximize the signal power-to- (noise power + co-channel interference power) ratio at the output of the RAKE receiver 410.
402-i is adjusted to control the directivity of the adaptive antenna.

As a result, the adaptive antenna section 400 outputs a received signal in which the influence of the delayed wave having a delay time smaller than the chip time width of the spread signal and the influence of the co-channel interference are reduced. RAKE receiving section 410 performs the same signal processing on this signal as in the first embodiment.

As described above, the spread spectrum wireless transmission receiver according to the fourth embodiment is affected by the delayed wave having a delay time smaller than the chip time width of the spread signal, which cannot be removed by the RAKE receiver. And the influence of co-channel interference waves are reduced based on the signal power-to- (noise power + co-channel interference power) ratio of the output signal of RAKE receiving section 410.

(Fifth Embodiment) As shown in FIG. 5, a spread spectrum radio transmission receiver according to a fifth embodiment includes a directivity control section 504 of an adaptive antenna section 500,
Output of adaptive antenna adder 503 and error rate detector 5
Amplification ratio variable amplification units 502-1 to 50-50 based on the 16 detection outputs
Control the 2-n amplification factor. Other configurations are the same as those of the second embodiment.

In this apparatus, directivity control section 504 reduces the influence of a delayed wave having a delay time smaller than the chip time width of the spread signal in the output signal of adaptive antenna adder section 503, and reduces the influence of RAKE receiving section 510. The amplification factor of the variable amplification factor amplifier 502-i is adjusted so that the error rate of the output signal is reduced, and the directivity of the adaptive antenna is controlled.

As a result, the adaptive antenna section 500 outputs a received signal in which the influence of the delayed wave having a delay time smaller than the chip time width of the spread signal and the influence of the co-channel interference are reduced. RAKE receiving section 510 performs the same signal processing on this signal as in the second embodiment.

As described above, the spread spectrum wireless transmission receiver according to the fifth embodiment has the effect of the delayed wave having a delay time smaller than the chip time width of the spread signal, which cannot be removed by the RAKE receiver. And the effect of co-channel interference waves, adaptive antenna adder 503
And the error rate of the output signal of the RAKE receiving unit 510 is reduced.

(Sixth Embodiment) As shown in FIG. 6, a spread spectrum radio transmission receiver according to a sixth embodiment includes a directivity control section 604 of an adaptive antenna section 600,
Output of adaptive antenna adder 603 and S / N detector 6
Amplification ratio variable amplification sections 602-1 to 60-60 based on the 16 detection outputs
Control the 2-n amplification factor. Other configurations are the same as those of the third embodiment.

In this device, directivity control section 604 reduces the influence of a delayed wave having a delay time smaller than the chip time width of the spread signal in the output signal of adaptive antenna addition section 603, and reduces the effect of RAKE reception section 610. Variable amplification factor amplifier 602-i so as to increase the S / N ratio of the output signal.
To control the directivity of the adaptive antenna.

As a result, the adaptive antenna section 600 outputs a received signal in which the influence of the delayed wave having a delay time smaller than the chip time width of the spread signal and the influence of the co-channel interference are reduced. RAKE receiving section 610 performs the same signal processing as in the third embodiment on this signal.

As described above, the spread spectrum radio transmission receiver according to the sixth embodiment has the effect of the delayed wave having a delay time smaller than the chip time width of the spread signal, which cannot be removed by the RAKE receiver. And the effect of co-channel interference waves, adaptive antenna adder 603
And the S / N of the output signal of the RAKE receiving unit 610 are reduced.

(Seventh Embodiment) In the spread spectrum wireless transmission receiver according to the seventh embodiment, as shown in FIG. 7, the directivity control unit 704 of the adaptive antenna unit 700 includes:
The output of adaptive antenna adder 703 and S / (N +
I) The amplification factors of the amplification factor variable amplification units 702-1 to 702-n are controlled based on the detection output of the detection unit 716. Other configurations are the same as those of the fourth embodiment.

In this device, directivity control section 704 reduces the influence of a delay wave having a delay time smaller than the chip time width of the spread signal in the output signal of adaptive antenna addition section 703, and reduces the effect of the RAKE reception section 710. The amplification factor of the variable amplification factor amplifier 702-i is adjusted so that the signal power-to- (noise power + co-channel interference power) ratio of the output signal is increased, and the directivity of the adaptive antenna is controlled.

As a result, the adaptive antenna unit 700 outputs a reception signal in which the influence of the delay wave having a delay time smaller than the chip time width of the spread signal and the influence of the co-channel interference wave are reduced. The RAKE receiving unit 710 is
Signal processing similar to that of the fourth embodiment is performed on this signal.

As described above, the spread spectrum radio transmission / reception apparatus of the seventh embodiment is affected by a delayed wave having a delay time smaller than the chip time width of the spread signal, which cannot be removed by the RAKE receiver. And the effect of co-channel interference waves, adaptive antenna adder 703
And the signal power-to- (noise power + co-channel interference power) ratio of the output signal of the RAKE receiving section 710 is reduced as a reference.

(Eighth Embodiment) As shown in FIG. 8, a spread spectrum radio transmission receiver according to an eighth embodiment comprises n reception antenna units 801-1 to 801-n and a path m. Directivity control unit 802-1 that independently controls the directivity of each
802-k, weighting adders 803-1 to 803-k for weighting the signal of each path m, despreading units 804-1 to 804-k for despreading the signal of each path m, Diffusion units 804-1 to 804-
delay adjustment unit 805-1 to adjust the time delay of the k output signal
805-k, variable gain amplifiers 807-1 to 807-k for adjusting the amplitude of the signal of each path m, and variable gain amplifiers 807-1 to 80-80
A propagation path coefficient control unit 806 that controls the amplification factor of 7-k and an addition unit 808 that combines signals of the respective paths are provided.

Each of the weighting adders 803-1 to 803-k, as shown as 803,
It comprises a variable amplifier for amplifying the -n received signal at an amplification factor specified by the directivity controllers 802-1 to 802-k, and an adder for adding the outputs of the respective variable amplifiers.

The receiving filter, the receiving amplifier, the frequency converter, the intermediate frequency section, the quadrature detector and the like included in the ordinary radio transmission receiver are omitted in the figure.

In this receiving apparatus, n receiving antenna sections 801-1 to 801-n having different spatial positions receive radio waves and output them to weighting adders 803-1 to 803-k. The adders 803-1 to 803-k amplify each received signal at an amplification factor controlled by the directivity control units 802-1 to 802-k and then add the signals. The directivity control units 802-1 to 802-k control the influence of the delayed wave having a delay time smaller than the chip time width of the spread signal and the co-channel interference at the outputs of the corresponding weighting adders 803-1 to 803-k. The weighting of each of the weighting adders 803-1 to 803-k is independently adjusted so that the influence is minimized, and the directivity corresponding to each path m is controlled. Weighting adders 803-1 to 803-k and directivity control units 802-1 to 80-80
With 2-k, k kinds of antenna directivities are thus created.

The received signal in which the influence of the delayed wave having the delay time smaller than the chip time width of the spread signal and the influence of the co-channel interference are reduced by the adaptive antenna,
Despreading is performed by despreading sections 804-1 to 804-k corresponding to each path. Despreading sections 804-1 to 804-k correlate the received signal with the spread signal, detect a delay time larger than the chip time width of the spread signal, and delay by delay adjustment sections 805-1 to 805-k. Time correction and unnecessary time signal removal. The outputs of the delay adjustment units 805-1 to 805-k are adjusted in amplitude by the variable amplification factor amplification unit 807-m for each path m, and are subjected to path synthesis by the addition unit 808. The propagation path coefficient control unit 806 includes despreading units 804-1 to 804-1.
Based on the output of 04-k, variable amplification factor of each path 807-1 to 8
Control the amplification factor of 07-k.

As described above, in the spread spectrum radio transmission / reception apparatus of the eighth embodiment, the antenna directivity for the signal of each path m is ensured by the independent control operation of the plurality of directivity control units, and the spread signal is transmitted. Thus, a signal of each path m in which the influence of the delayed wave having a delay time smaller than the chip time width and the influence of the co-channel interference wave are reduced. The signal of each path m is despread by each of the k despreading units, and then the delay amount is adjusted so as to remove the influence of a delay wave having a delay time larger than the chip time width of the spread signal, and the signals are synthesized. Is done. That is, the signals of the path m that match the directivity are extracted by independent control operations of the plurality of directivity control units, the delay amounts of the extracted signals are adjusted, and the paths are combined. As a result, the influence of the delayed wave having a delay time smaller than the chip time width of the spread signal and the influence of the co-channel interference wave, which cannot be removed by the RAKE receiver, are reduced, and the overall reception characteristics are improved. improves.

(Ninth Embodiment) As shown in FIG. 9, a spread spectrum wireless transmission receiver according to a ninth embodiment replaces individual directivity control units with each weighted adder.
A directivity control unit 903 for controlling the directivity of 902-1 to 902-k is provided. Other configurations are the same as those of the eighth embodiment.

In this device, weighting adders 902-1 to 90-2
The 2-k and directivity control unit 903 includes n reception antenna units 901
By adjusting the weights of the radio waves received in -1 to 901-n, k kinds of antenna directivities are created. At this time, the directivity control unit 903 includes weighting adders 902-1 to 902-
Control is performed so that the path combining gain is as large as possible so that the main directivities of the k types created by k do not capture radio waves from the same direction. Further, directivity control section 903 minimizes the influence of a delayed wave having a delay time smaller than the chip time width of the spread signal and the influence of co-channel interference on each output of weighting adders 902-1 to 902-k. The weighting adders 902-1 to 902-k of each path are adjusted so that Other operations are the same as those of the device according to the eighth embodiment.

This apparatus reduces the influence of a delayed wave having a delay time smaller than the chip time width of a spread signal that cannot be removed by a RAKE receiver from a received signal, and reduces the influence of a co-channel interference wave. Can be. Further, since the k types of antenna directivities are controlled so as not to overlap, a larger path combining gain can be obtained as compared to a case where this control is not performed, and overall reception characteristics can be improved.

(Tenth Embodiment) As shown in FIG. 10, a spread spectrum radio transmission receiver according to a tenth embodiment obtains an error rate from output signals of despreading units 1004-1 to 1004-k. Error rate detection units 1005-1 to 1005-k, and each directivity control unit 1002-1 to 1002-k has an error rate detection unit 1005-1 to 10
Weighted adder 1003-1 based on the error rate output by 05-k
Adjust ~ 1003-k. Other configurations are the same as those of the eighth embodiment.

In this apparatus, the error rate detection units 1005-1 to 1005
-k calculates the error rate from the output signals of the despreading units 1004-1 to 1004-k for each path m, and the directivity control units 1002-1 to 1002-k output the despreading units 1004-1 to 1004-k Weighted adders 1003-1 to 1003-k of each path so that the error rate of each path with respect to the output of
Is adjusted to control the directivity corresponding to each path.

Therefore, in the spread spectrum wireless transmission receiver according to the tenth embodiment, the influence and delay of the co-channel interference wave are determined by the adaptive antenna for each path on the basis of minimizing the error rate after despreading. The effect of the waves is removed.

(Eleventh Embodiment) As shown in FIG. 11, the spread spectrum radio transmission receiver according to the eleventh embodiment has the signal power of the output signal of each of the despreading units 1104-1 to 1104-k. S / N detectors 1105-1 to 1105 for detecting noise-to-noise power ratio
-k, and each of the directivity control units 1102-1 to 1102-k has a weighting adder 1103 based on the output of the S / N detection units 1105-1 to 1105-k.
Adjust -1 to 1103-k. Other configurations are the same as those of the eighth embodiment.

In this apparatus, the S / N detectors 1105-1 to 1105
-k calculates the signal power to noise power ratio from the output signals of the despreading units 1104-1 to 1104-k for each path m, and
1102-k is a weighted adder for each path so that the signal power to noise power ratio of the output of the despreading units 1104-1 to 1104-k is maximized.
By adjusting 1103-1 to 1103-k, directivity corresponding to each path is controlled.

Therefore, in the spread spectrum radio transmission / reception apparatus of the eleventh embodiment, the influence of co-channel interference waves is determined on the basis of maximizing the S / N ratio after despreading by the adaptive antenna for each path. And the effect of the delayed wave is removed.

(Twelfth Embodiment) A spread-spectrum wireless transmission receiver according to a twelfth embodiment has a signal power in an output signal of each despreading unit 1204-1 to 1204-k as shown in FIG. S for detecting the ratio of (noise power + interference wave power)
/ (N + I) detection units 1205-1 to 1205-k, and each of the directivity control units 1202-1 to 1202-k is an S / (N + I) detection unit 1205-1 to 120-12.
The weighting adders 1203-1 to 1203-k are adjusted based on the output of 05-k. Other configurations are the same as those of the eighth embodiment.

In this device, the S / (N + I) detector 1205
-1 to 1205-k determine the signal power to (noise power + interference wave power) ratio from the output signals of the despreading units 1204-1 to 1204-k for each path m, and directivity control units 1202-1 to 1202 -k is the despreading unit 1204-1 ~
Weighting adder 1203 for each path to maximize the signal power to (noise power + interference power) ratio at the output of 1204-k
The directivity corresponding to each path is controlled by adjusting -1 to 1203-k.

Therefore, in the spread spectrum wireless transmission receiver according to the twelfth embodiment, the adaptive antenna for each path uses the same channel on the basis of maximizing the S / (N + I) ratio of the despread signal. The effect of the interference wave and the effect of the delayed wave are removed.

(Thirteenth Embodiment) As shown in FIG. 13, a spread spectrum radio transmission receiver according to a thirteenth embodiment obtains an error rate from output signals of despreading sections 1304-1 to 1304-k. Error rate detection unit 1305 for detecting
1303 adjusts weighting adders 1302-1 to 1302-k based on the error rate output from error rate detecting section 1305. Other configurations are the same as those of the ninth embodiment.

In this apparatus, error rate detecting section 1305 obtains the error rate from the output signals of despreading sections 1304-1 to 1304-k for each path m, and directivity control section 1303 sets despreading section 1304-1 Adjust the weighting adders 1302-1 to 1302-k of each path so that the error rate of each path with respect to the output of ~ 1304-k is minimized, and the main directions of the k types of antenna directivities do not overlap. The directivity corresponding to each path is controlled.

Therefore, in the spread spectrum wireless transmission receiver according to the thirteenth embodiment, the error rate of the signal after despreading is controlled by the adaptive antenna for each path controlled so that the main directions of the antenna directivity do not overlap. The effect of the co-channel interference wave and the effect of the delayed wave are removed on the basis of minimizing the following.

(Fourteenth Embodiment) As shown in FIG. 14, a spread spectrum radio transmission / reception apparatus according to a fourteenth embodiment performs S / S of output signals of despreading units 1404-1 to 1404-k.
An S / N detector 1405 for detecting an N ratio is provided, and a directivity controller is provided.
1403 adjusts the weighting adders 1402-1 to 1402-k based on the output of the S / N detector 1405. Other configurations are the same as those of the ninth embodiment.

In this apparatus, the S / N detector 1405 obtains the S / N ratio of the output signals of the despreaders 1404-1 to 1404-k for each path m, and the directivity controller 1403 Weighted adders 1402-1 to 1402 for each path so that the signal power to noise power ratio of each path at the outputs of 1404-1 to 1404-k is maximized, and the main directions of the k types of antenna directivities do not overlap. Adjust -k to control the directivity corresponding to each path.

Therefore, in the spread spectrum radio transmission / reception apparatus of the fourteenth embodiment, the S / D of the despread signal is controlled by the adaptive antenna for each path controlled so that the main directions of the antenna directivity do not overlap. The influence of the co-channel interference wave and the influence of the delay wave are removed on the basis of maximizing the N ratio.

(Fifteenth Embodiment) As shown in FIG. 15, a spread-spectrum wireless transmission receiver according to a fifteenth embodiment has a signal power of an output signal of each of the despreading units 1504-1 to 1504-k. S / (N) to detect the ratio of (noise power + interference wave power)
+ I) a detection unit 1505, and the directivity control unit 1503 has S / (N
+ I) Weighting adder 1502 based on output of detection section 1505
Adjust -1 to 1502-k. Other configurations are the same as those of the ninth embodiment.

In this device, the S / (N + I) detecting section 1505
Calculates the signal power-to- (noise power + interference wave power) ratio of the output signals of the despreading sections 1504-1 to 1504-k for each path m, and the directivity control section 1503 determines the despreading sections 1504-1 to 1504. The weighting adders 1502-1 to 1502-1 of each path so that the signal power-to- (noise power + interference wave power) ratio of each path at the -k output is maximized and the main directions of the k types of antenna directivities do not overlap. Adjust the 1502-k to control the directivity corresponding to each path.

Therefore, in the spread spectrum radio transmission / reception apparatus of the fifteenth embodiment, the S / D of the signal after despreading is controlled by the adaptive antenna for each path controlled so that the main directions of the antenna directivity do not overlap. The influence of the co-channel interference wave and the influence of the delay wave are removed on the basis of maximizing the (N + I) ratio.

(Sixteenth Embodiment) In a spread spectrum wireless transmission receiver according to a sixteenth embodiment, as shown in FIG. 16, a directivity control unit 1603 includes a weighting adder 1602-1.
The weighting adders 1602-1 to 1602-k are adjusted based on the outputs of 〜1602-k and the detection output of the error rate detection unit 1605. Other configurations are the same as those of the thirteenth embodiment.

In this device, directivity control section 1603 controls the influence of delayed waves having a delay time smaller than the chip time width of spread signals and the influence of co-channel interference waves at the outputs of weighting adders 1602-1 to 1602-k. And the despreading part
Weighting adders 1602-1 to 1602-k for each path so that the error rate of each path becomes smaller with respect to the outputs of 1604-1 to 1604-k, and the main directions of the k types of antenna directivities do not overlap. Is adjusted to control the directivity corresponding to each path.

Therefore, in the spread spectrum radio transmission receiver according to the sixteenth embodiment, the adaptive antenna for each path, which is controlled so that the main directions of the antenna directivity do not overlap, allows the chip time width at the output of the adaptive antenna to be increased. Eliminating the effects of co-channel interference and delayed waves on the basis of reducing the effects of delayed waves having smaller delay times and co-channel interference, and reducing the error rate of the despread signal Is performed.

(Seventeenth Embodiment) As shown in FIG. 17, in a spread spectrum wireless transmission receiver according to a seventeenth embodiment, a directivity control section 1703 includes a weighting adder 1702-1.
The weighting adders 1702-1 to 1702-k are adjusted based on the outputs of .about.1702-k and the detection output of the S / N detector 1705. Other configurations are the same as those of the device of the fourteenth embodiment.

In this device, directivity control section 1703 controls the influence of delayed waves having a delay time smaller than the chip time width of spread signals and the influence of co-channel interference waves at the outputs of weighting adders 1702-1 to 1702-k. And the despreading part
Weighting adders 1702-1 to 1702 for each path so that the S / N ratio of each path becomes large with respect to the outputs of 1704-1 to 1704-k and the main directions of the k types of antenna directivities do not overlap. Adjust -k to control the directivity corresponding to each path.

Therefore, in the spread spectrum radio transmission / reception apparatus of the seventeenth embodiment, the chip time width at the output of the adaptive antenna is controlled by the adaptive antenna for each path controlled so that the main directions of the antenna directivity do not overlap. The influence of the co-channel interference wave and the influence of the delay wave on the basis of reducing the influence of the delay wave having a smaller delay time and the co-channel interference wave and increasing the S / N ratio of the despread signal. Is removed.

(Eighteenth Embodiment) As shown in FIG. 18, in a spread spectrum wireless transmission receiver according to an eighteenth embodiment, a directivity control section 1803 includes a weighting adder 1802-1.
The weighting adders 1802-1 to 1802-k are adjusted based on the outputs of 1802-k and the detection output of the S / (N + I) detection unit 1805. Other configurations are the same as those of the device of the fifteenth embodiment.

In this apparatus, directivity control section 1803 controls the influence of delay waves having delay times smaller than the chip time width of spread signals and the influence of co-channel interference waves at the outputs of weighting adders 1802-1 to 1802-k. And the despreading part
S / (N + I) of each path for output of 1804-1 to 1804-k
The weighting adders 1802-1 to 1802-1 to each of the paths so that the ratio becomes large and the main directions of the k types of antenna directivities do not overlap.
Adjust the 1802-k to control the directivity corresponding to each path.

Therefore, in the spread spectrum wireless transmission receiver according to the eighteenth embodiment, the chip time width at the output of the adaptive antenna is controlled by the adaptive antenna for each path controlled so that the main directions of the antenna directivity do not overlap. The influence of the co-channel interference wave and the delay wave on the basis of reducing the influence of the delay wave having a smaller delay time and the co-channel interference wave and increasing the S / (N + I) ratio of the despread signal. Is removed.

(Nineteenth Embodiment) As shown in FIG. 19, in the spread spectrum wireless transmission receiver according to the nineteenth embodiment, each of the directivity controllers 1902-1 to 1902-k includes a weighting adder. Outputs of 1903-1 to 1903-k and error rate detection units 1905-1 to 19
Weighted adders 1903-1 to 193-1 based on the detection output of 05-k
Adjust 03-k. Other configurations are the same as those of the device of the tenth embodiment.

(Twentieth Embodiment) As shown in FIG. 20, in a spread spectrum wireless transmission receiver according to a twentieth embodiment, each of the directivity controllers 2002-1 to 2002-k includes a weighting adder. Output of 2003-1 to 2003-k and S / N detector 2005-1 to 20
05-k detection output and weighted adder 2003-1 to 2003-20
Adjust 03-k. Other configurations are the same as those of the eleventh embodiment.

(Twenty-First Embodiment) As shown in FIG. 21, in a spread-spectrum wireless transmission receiver according to a twenty-first embodiment, each of the directivity controllers 2102-1 to 2102-k includes a weighting adder. Outputs of 2103-1 to 2103-k and S / (N + I) detector 21
05-1 to 2105-k based on the detection outputs
Adjust 03-1 to 2103-k. Other configurations are the same as those of the twelfth embodiment.

[0089]

As is apparent from the above description of the embodiments, the spread spectrum radio transmission receiving apparatus and receiving method of the present invention have the same effects as those of the delay channel having the delay time smaller than the chip time width of the spread signal and the same channel. The effect of the interference wave can be reduced, and the reception characteristics can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a spread spectrum wireless transmission receiver according to a first embodiment;

FIG. 2 is a block diagram illustrating a configuration of a spread spectrum wireless transmission receiver according to a second embodiment;

FIG. 3 is a block diagram illustrating a configuration of a spread spectrum wireless transmission receiver according to a third embodiment;

FIG. 4 is a block diagram showing a configuration of a spread spectrum wireless transmission receiver according to a fourth embodiment;

FIG. 5 is a block diagram illustrating a configuration of a spread spectrum wireless transmission receiver according to a fifth embodiment;

FIG. 6 is a block diagram illustrating a configuration of a spread spectrum wireless transmission receiver according to a sixth embodiment;

FIG. 7 is a block diagram showing a configuration of a spread spectrum wireless transmission receiver according to a seventh embodiment;

FIG. 8 is a block diagram illustrating a configuration of a spread spectrum wireless transmission receiver according to an eighth embodiment;

FIG. 9 is a block diagram illustrating a configuration of a spread spectrum wireless transmission receiver according to a ninth embodiment;

FIG. 10 is a block diagram showing a configuration of a spread spectrum wireless transmission receiver according to a tenth embodiment;

FIG. 11 is a block diagram showing a configuration of a spread spectrum wireless transmission receiver according to an eleventh embodiment.

FIG. 12 is a block diagram showing a configuration of a spread spectrum wireless transmission receiver according to a twelfth embodiment;

FIG. 13 is a block diagram illustrating a configuration of a spread spectrum wireless transmission receiver according to a thirteenth embodiment;

FIG. 14 is a block diagram showing a configuration of a spread spectrum wireless transmission receiver according to a fourteenth embodiment;

FIG. 15 is a block diagram showing a configuration of a spread spectrum wireless transmission receiver according to a fifteenth embodiment;

FIG. 16 is a block diagram showing a configuration of a spread spectrum wireless transmission receiver according to a sixteenth embodiment;

FIG. 17 is a block diagram showing a configuration of a spread spectrum wireless transmission receiver according to a seventeenth embodiment;

FIG. 18 is a block diagram illustrating a configuration of a spread spectrum wireless transmission receiver according to an eighteenth embodiment;

FIG. 19 is a block diagram showing a configuration of a spread spectrum wireless transmission receiver according to a nineteenth embodiment;

FIG. 20 is a block diagram showing a configuration of a spread spectrum wireless transmission receiver according to a twentieth embodiment;

FIG. 21 is a block diagram showing a configuration of a spread spectrum wireless transmission receiver according to a twenty-first embodiment.

FIG. 22 is a block diagram showing a configuration of a conventional spread spectrum wireless transmission receiver having a RAKE reception function.

[Explanation of symbols]

100, 200, 300, 400, 500, 600, 700 Adaptive antenna unit 101-i, 201-i, 301-i, 401-i, 501-i, 601-i, 701-i, 8
01-i, 901-i, 1001-i, 1101-i, 1201-i, 1301-i, 1401-
i, 1501-i, 1601-i, 1701-i, 1801-i, 1901-i, 2001-
i, 2101-i Receive antenna section 102-i, 202-i, 302-i, 402-i, 502-i, 602-i, 702-i of branch i
Variable gain amplifiers 103, 203, 303, 403, 503, 603, 703 for branch i Adaptive antenna adders 104, 204, 304, 404, 504, 604, 704, 903, 1303, 140
3, 1503, 1603, 1703, 1803 Directivity control unit 110, 210, 310, 410, 510, 610, 710, 2210 RAKE
Receiver 111, 211, 311, 411, 511, 611, 711, 2211 Despreader 112-m, 212-m, 312-m, 412-m, 512-m, 612-m, 712-m, 8
05-m, 905-m, 1006-m, 1106-m, 1206-m, 1306-m, 1406-
m, 1506-m, 1606-m, 1706-m, 1806-m, 1906-m, 2006-
m, 2106-m Path m delay adjustment unit 113-m, 213-m, 313-m, 413-m, 513-m, 613-m, 713-m, 8
07-m, 907-m, 1008-m, 1108-m, 1208-m, 1308-m, 1408-
m, 1508-m, 1608-m, 1708-m, 1808-m, 1908-m, 2008-
m, 2108-m Variable gain amplifier 114, 214, 314, 414, 514, 614, 714, 806, 906, 100
7, 1107, 1207, 1307, 1407, 1507, 1607, 1707, 180
7, 1907, 2007, 2107, 2214 Channel coefficient control unit 115, 215, 315, 415, 515, 615, 715, 2215 RAKE
Receiver adder 216, 516, 1305, 1605 Error rate detector 316, 616, 1405, 1705 S / N detector 416, 716, 1505, 1805 S / (N + I) detector 802-m, 1002-m, 1102 -m, 1202-m, 1902-m, 2002-m, 210
2-m path m directivity controller 803, 902, 1003, 1103, 1203, 1302, 1402, 1502, 160
2, 1702, 1802, 1903, 2003, 2103 Weighted adder 803-m, 902-m, 1003-m, 1103-m, 1203-m, 1302-m, 1402
-m, 1502-m, 1602-m, 1702-m, 1802-m, 1903-m, 2003-
m, 2103-m Path m weight adder 804-m, 904-m, 1004-m, 1104-m, 1204-m, 1304-m, 1404
-m, 1504-m, 1604-m, 1704-m, 1804-m, 1904-m, 2004-
m, 2104-m Despreading unit of path m 808, 908, 1009, 1109, 1209, 1309, 1409, 1509, 160
9, 1709, 1809, 1909, 2009, 2109 Adder 1005-m, 1905-m Pass m error rate detector 1105-m, 2005-m Pass m S / N detector 1205-m, 2105-m pass S / (N + I) detector 2201 Receiving antenna unit 2202 High frequency unit 2203 Quadrature detector 2212-m Path m delay adjuster 2213-m Path m amplification factor variable amplifier

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5K022 EE02 EE32 EE35 5K059 CC03 CC04 DD35 5K067 AA03 AA23 BB04 CC10 CC24 DD45 GG11 KK02

Claims (19)

[Claims] 1. A spread-spectrum wireless transmission receiver comprising an adaptive antenna and a RAKE receiver for inputting an output signal from the adaptive antenna, wherein the reception characteristic of the spread-spectrum wireless transmission receiver is improved. A spread spectrum radio transmission receiving apparatus, wherein the directivity of the adaptive antenna is controlled so as to reduce the influence of a signal that cannot be handled by the RAKE receiver. 2. A spectrum comprising: an adaptive antenna; despreading means for despreading an output signal from the adaptive antenna; and a RAKE receiver having a path combining means for path combining the despread signal. A spread radio transmission receiver, characterized in that the directivity of the adaptive antenna is controlled so as to remove the influence of a delay wave whose delay time is smaller than the chip time width of the spread signal in an output signal of the adaptive antenna. Spread spectrum wireless transmission receiver. 3. A spectrum comprising: an adaptive antenna; despreading means for despreading an output signal from the adaptive antenna; and a RAKE receiver provided with path combining means for path combining the despread signal. A spread-spectrum wireless transmission receiver, wherein the directivity of the adaptive antenna is controlled so as to remove the influence of co-channel interference waves in an output signal of the adaptive antenna. 4. A spectrum comprising: an adaptive antenna; despreading means for despreading an output signal from the adaptive antenna; and a RAKE receiver having a path combining means for path combining the despread signal. A spread radio transmission receiver, comprising: a directivity of the adaptive antenna such that an output signal of the adaptive antenna removes an influence of a delayed wave whose delay time is smaller than a chip time width of the spread signal and an influence of a co-channel interference wave. And a spread spectrum wireless transmission receiver. 5. The spread spectrum wireless transmission receiving apparatus according to claim 1, wherein the directivity of said adaptive antenna is controlled using an output signal of said adaptive antenna. 6. The directivity of the adaptive antenna is controlled by using one of an error rate, a signal power to noise power ratio, and a signal power to (noise power + interference power) in an output signal of the RAKE receiver. The spread spectrum wireless transmission receiver according to any one of claims 1 to 4, wherein: 7. The adaptive signal processing method using an output signal of the adaptive antenna and any one of an error rate, a signal power to noise power ratio, and a signal power to (noise power + interference power) in an output signal of the RAKE receiver. The spread spectrum wireless transmission receiver according to any one of claims 1 to 4, wherein the directivity of the antenna is controlled. 8. A spread-spectrum wireless transmission receiver comprising: a plurality of adaptive antennas; a de-spreading unit for de-spreading an output signal from the adaptive antenna; and a path combining unit for path-synthesizing the de-spread signal. A spread spectrum wireless transmission reception device, wherein the directivity of the adaptive antenna is controlled so as to improve the characteristics of a signal combined by the path combining unit. 9. A spread spectrum wireless transmission receiver comprising: a plurality of adaptive antennas; despreading means for despreading an output signal from the adaptive antenna; and path combining means for path combining the despread signals. Wherein the directivity of the adaptive antenna is controlled such that the delay time in the output signal of the adaptive antenna is removed by the influence of a delayed wave having a delay time smaller than the chip time width of the spread signal. Receiver. 10. A spread-spectrum wireless transmission receiving apparatus comprising: a plurality of adaptive antennas; a despreading means for despreading an output signal from the adaptive antenna; and a path combining means for path-synthesizing the despread signal. A spread spectrum wireless transmission receiver, wherein the directivity of the adaptive antenna is controlled so as to remove the influence of co-channel interference waves in the output signal of the adaptive antenna. 11. A spread-spectrum wireless transmission receiving apparatus comprising: a plurality of adaptive antennas; despreading means for despreading an output signal from the adaptive antenna; and path combining means for performing path combining on the despread signal. And controlling the directivity of the adaptive antenna so as to remove the influence of a delayed wave smaller than the chip time width of the spread signal and the influence of a co-channel interference wave in the output signal of the adaptive antenna. Characteristic spread spectrum wireless transmission receiver. 12. The spread spectrum wireless transmission receiver according to claim 8, wherein the directivity of the plurality of adaptive antennas is controlled so as not to overlap. 13. The spread spectrum wireless transmission receiving apparatus according to claim 8, wherein the directivity of said adaptive antenna is controlled by using an output signal of said adaptive antenna. 14. An error rate in an output signal of said despreading means, a signal power to noise power ratio, and a signal power to (noise power +
The spread spectrum wireless transmission receiver according to any one of claims 8 to 12, wherein the directivity of the adaptive antenna is controlled using any one of interference power. 15. The adaptive signal processing method using the output signal of the adaptive antenna and one of an error rate, a signal power to noise power ratio, and a signal power to (noise power + interference power) in an output signal of the despreading means. 13. The spread spectrum wireless transmission reception device according to claim 8, wherein the directivity of the antenna is controlled. 16. A receiving step of receiving radio waves with a plurality of antennas, an amplifying step of amplifying the received signals with different amplification factors, an adding step of adding the amplified signals, and an adding step of adding the amplified signals. A de-spreading step of de-spreading the signal, a path combining step of giving a delay time to the de-spread signal and path combining, and using the added signal so as to improve the characteristics of the path combined signal. And a directivity control step of controlling the amplification factor by using the method. 17. A receiving step of receiving radio waves with a plurality of antennas, an amplifying step of amplifying the received signals with different amplification factors, an adding step of adding the amplified signals, and an adding step of adding the amplified signals. A despreading step of despreading the signal; a path combining step of providing a path to the despread signal by delaying the signal; and a path combining step of improving the characteristics of the path combined signal. Error rate,
A directivity control step of controlling the amplification factor using one of a signal power to noise power ratio and a signal power to (noise power + interference power). 18. A receiving step of receiving radio waves with a plurality of antennas, a weighting and adding step of amplifying and adding the received signals at different amplification factors, and a despreading step of despreading the weighted and added signals. A path combining step of performing path combining by giving a delay time to the despread signal, and controlling the amplification factor using the weighted and added signal so as to improve the characteristics of the path combined signal. A spread spectrum wireless transmission reception method comprising: 19. A receiving step of receiving radio waves with a plurality of antennas, a weighting and adding step of amplifying and adding the received signals at different amplification factors, and a despreading step of despreading the weighted and added signals. A path combining step of performing path combining by giving a delay time to the despread signal; and an error rate, a signal power to noise power ratio in the despread signal so as to improve the characteristics of the path combined signal. And a directivity control step of controlling the amplification factor using one of a signal power pair (noise power + interference power).