JP2000049879A - Receiver, transmitter-receiver and its method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the dispersion of components and characteristics and the gain unbalance of I and Qch signals after detection at a low cost without using a correction circuit and the expensive component of little characteristic change and to reduce a circuit scale. SOLUTION: After reception signals are orthogonally detected in a detector 105, the are converted into digital signals (D signals) in A/D converters 106 and 107, a DC offset value is obtained by subtracting a reference value from the average value of the D signals obtained in average value calculators 111 and 112 in subtractors 113 and 114, the value is added to a DC offset correction value obtained at the reception timing of a previous time in adders 117 and 118 and the correction value of the reception timing of this time is obtained. The value for which the correction value is delayed in delay devices 119 and 120 is subtracted from the D signals of a present reception timing in the subtractors 108 and 109, DC offset components are removed and decoding is performed in a decoder 110.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving apparatus, a transmitting / receiving apparatus, and a method used for digital mobile communication and the like.

[0002]

2. Description of the Related Art Conventionally, as a receiving apparatus, a transmitting / receiving apparatus and a method, there is one disclosed in Japanese Patent Application Laid-Open No. 9-326775.

FIG. 18 is a block diagram showing a configuration of a conventional receiving apparatus. The receiving apparatus shown in FIG. 18 includes an antenna 1801, a detector 1802, a DC offset calculator 1803, 1804, a subtractor 1805, 1806,
It comprises A / D converters 1807 and 1808 and a decoder 1809.

The detector 1802 performs quadrature detection on the signal received by the antenna 1801, and obtains the I and Qch signals (I and Q channel signals) obtained by the quadrature detection by the DC offset calculators 1803 and 1804 and the subtractor 1805.
Output to 1806.

[0005] DC offset calculators 1803, 1804
Calculates the DC offset amount from the I and Qch signals,
This DC offset amount is output to subtracters 1805 and 1806.

[0006] Subtractors 1805 and 1806 provide I and Qc
h signal by subtracting the DC offset amount, thereby obtaining D
The I and Qch signals from which the C offset component has been removed are represented by A
/ D converters 1807 and 1808.

The A / D converters 1807 and 1808 are DC
The I and Qch signals from which the offset components have been removed are converted into digital signals, and the digitized I and Qc signals are converted.
h data is output to the decoder 1809. Decoder 180
9 obtains decoded data by decoding the I and Qch data.

An example in which the DC offset is removed by an analog circuit as in the above-described receiving apparatus is described in Hayashi et al., “DC Offset Removal Method for TDMA (Time Division Multiple Access) Direct Conversion Receiver,” 1997 Electronic Information It is also described in the Communication Society Conference of the Communication Society, B-5-167) and the like.

Next, a conventional transmitting / receiving apparatus will be described with reference to FIG. However, in the transmitting / receiving apparatus shown in FIG. 19, parts corresponding to the respective parts of the receiving apparatus shown in FIG. 18 are denoted by the same reference numerals, and description thereof will be omitted.

A transmitting / receiving apparatus 1800 shown in FIG. 19 includes a receiving unit 1801 and a transmitting unit 1802, and a transmitting / receiving antenna 1803 shared by the receiving unit 1801 and the transmitting unit 1802.
And a duplexer 1804 for switching between transmission and reception.

A receiving section 1801 receives an RF (Radio F
requency) unit 1805, variable gain amplifier 1806,
An amplitude calculator 1807 and an AGC (Automatic Gain Control)
l) Processor 1808, data holder 1809, and FIG.
And a detector 1802 to a decoder 1809 of the receiving apparatus shown in FIG.

The transmitting section 1802 includes a mapping unit 1810
, D / A converters 1811 and 1812, and a modulator 181
3 is provided.

In such a configuration, the antenna 180
3 and an IF signal received by the RF unit 1805 via the duplexer 1804, an amplitude is calculated by an amplitude calculator 1807 composed of an analog circuit, and the AGC processor 1807 keeps the calculated amplitude constant. The variable gain control value of the variable gain amplifier 1806 is calculated, and the calculated variable gain control value is held in a data receiving unit 1809 for a certain reception section to control the variable gain amplifier 1806.

As a result, A through the detector 1802
Control is performed so that the signal levels input to the / D converters 1807 and 1808 always have a constant value.

On the other hand, in transmission section 1802, transmission data to be transmitted is mapped to I and Q coded signals (I and Qch data) to be transmitted in mapping section 1810, and D / A converters 1811 and 1812 Is converted to an analog signal.

The converted I and Q channel signals are quadrature-modulated by modulator 1813 to obtain a transmission radio signal. The transmission wireless signal is transmitted by radio from an antenna 1803 via a duplexer 1804.

[0017]

However, in the above conventional apparatus, a circuit for performing AGC processing, calculation of DC offsets of I and Qch signals after quadrature detection, and DC
Since the circuit for removing the offset is constituted by an analog circuit, the circuit scale becomes large, and variations in components due to variations in components, voltage changes, temperature changes, etc. occur. Correction circuit,
There is a problem that it is necessary to design in consideration of variations in characteristics.

Also, due to the variation of the components of the detector and the variation of the characteristics due to the temperature change, the reception I and Qc
There is a problem that a gain imbalance occurs in the h signal.

Further, in order to minimize the variation of components and the variation of characteristics, it is necessary to use an expensive component with little change in characteristics and to add a correction circuit for reducing the variation of characteristics. There is a problem that the cost increases.

The present invention has been made in view of the above points, and does not require the use of a correction circuit and expensive parts with little change in characteristics, and at low cost, the dispersion of parts and characteristics and the detection of I and Qch signals after detection. An object of the present invention is to provide a receiving apparatus, a transmitting / receiving apparatus, and a method that can eliminate gain imbalance and reduce the circuit scale.

[0021]

According to the present invention, a detection signal is converted into a digital signal by an A / D converter after quadrature detection of a received signal by a detection means, and a reference value is calculated from the average value of the digital signal obtained by the average value calculation means. A DC offset value is obtained by subtraction by a subtracting means, and this value is calculated by the DC offset value obtained at the previous reception timing.
The correction value of the current reception timing is obtained by adding to the offset correction value by the addition means, and the value obtained by delaying the correction value by the delay means is subtracted from the digital signal of the current reception timing by the subtraction means to remove the DC offset component. Thereafter, decoding is performed by the decoding means.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a first embodiment of the present invention, a received signal is converted into a digital signal, and a reference value of the average value is subtracted from an average value of the digital signal for a certain period of time to obtain a DC offset value. This DC offset value is added to the DC offset correction value of the digital signal obtained at the previous reception timing to obtain the DC offset correction value of the current reception timing, and a value obtained by delaying the DC offset correction value by a predetermined time is the current reception timing. , A DC offset component is removed by subtracting from the digital signal, and a function of decoding the digital signal from which the DC offset component has been removed is adopted.

According to this configuration, since the DC offset component can be removed by digital processing, there is no need for correction due to component variation and characteristic variation as compared with the conventional analog circuit removing method, and no adjustment is required. A receiving device can be realized at low cost.

According to a second aspect of the present invention, there is provided a detecting means for orthogonally detecting a received signal, an A / D converting means for converting the orthogonally detected signal into a first digital signal, and a DC offset from the first digital signal. 1D for removing components
A first subtraction means for subtracting the C offset correction value to obtain a second digital signal; an average value calculation means for calculating an average value from a result obtained by adding the second digital signal for a certain period of time; And a second subtracting means for subtracting the reference value of the first DC offset value to obtain a DC offset value, and adding the DC offset value to the first DC offset correction value to obtain a second D offset value.
Adding means for obtaining a C offset correction value;
The present invention employs a configuration including delay means for delaying the offset correction value to obtain the first DC offset correction value, and decoding means for decoding the second digital signal.

According to this configuration, since the DC offset component can be removed by digital processing, there is no need for correction due to component variations and characteristic variations as compared with a conventional method of removing with an analog circuit, and no adjustment is required. A receiving device can be realized at low cost.

A third aspect of the present invention, in the second aspect, employs a configuration in which the delay means obtains the first DC offset correction value by delaying the second DC offset correction value by one or more reception slots.

According to this configuration, the DC offset correction value calculated over a plurality of reception slots can be used.

According to a fourth aspect of the present invention, in the second aspect or the third aspect, the average value calculating means replaces the function of calculating the average value from the result of adding the second digital signal for a certain period of time. A configuration having a function of calculating an average value from the maximum value and the minimum value of the second digital signal is adopted.

According to this configuration, the amount of calculation for removing the DC offset component can be reduced.

According to a fifth aspect of the present invention, there is provided a detecting means for orthogonally detecting a received signal, an A / D converting means for converting the orthogonally detected signal into a digital signal, and an average from a maximum value and a minimum value of the digital signal. Average value calculating means for calculating a value; first subtracting means for obtaining a DC offset value by subtracting a reference value of the average value from the average value; and a DC offset component by subtracting the DC offset value from the digital signal. Second subtraction means for removing the DC offset component, and decoding means for decoding the digital signal from which the DC offset component has been removed.
Is adopted.

According to this configuration, as compared with the conventional method of removing with an analog circuit, there is no need for correction due to component variations and characteristic variations, and a receiver can be realized without adjustment and at low cost. Further reduction in the amount of computation,
In addition, the circuit scale can be reduced.

According to a sixth aspect of the present invention, in the fifth aspect, the DC offset value output from the first subtraction means is determined by:
A configuration including a data holding unit that outputs to the second subtracting unit while holding time corresponding to one or a plurality of reception slots is adopted.

According to this configuration, since the DC offset value calculated in one reception slot can be used in a plurality of reception slots, the amount of calculation can be reduced accordingly.

According to a seventh aspect of the present invention, there is provided a detecting means for quadrature detecting a received signal, and the quadrature detecting signals I and Qc.
A that converts the h signal into digital I and Qch data
/ D conversion means, amplitude information calculation means for calculating the amplitude values of the I and Qch data, reciprocal calculation means for calculating the reciprocal of the amplitude values of the I and Qch data, and I and Q
first multiplying means for obtaining the amplitude correction value by multiplying the reciprocal of the ch data by the same reference value, and multiplying the I and Qch data by the amplitude correction value of the I and Qch data to obtain the Ic
second multiplying means for correcting the amplitude of the h data to be the same as the amplitude of the Qch data; and I and Qc having the same amplitude.
decoding means for decoding h data.

According to this configuration, since the reception gain can be corrected by digital processing, there is no need for correction due to variations in components and characteristics, and no adjustment is required, as compared with a conventional method of correcting the gain by an analog circuit. Moreover, the receiving device can be realized at low cost.

In an eighth aspect of the present invention, a detecting means for quadrature detecting a received signal, and I and Qc
A that converts the h signal into digital I and Qch data
/ D conversion means, amplitude information calculation means for calculating the amplitude values of the I and Qch data, reciprocal calculation means for calculating the reciprocal of the amplitude value of the Ich data, reciprocal of the Ich data and the amplitude of the Qch data First multiplication means for obtaining an amplitude correction value by multiplying the amplitude correction value and the Ich
Multiplying the amplitude of the Ich data by the Qc
A configuration including a second multiplying means for correcting the amplitude of the h data to be the same and a decoding means for decoding the I and Qch data having the same amplitude is adopted.

According to this configuration, since the reception gain can be corrected by digital processing, there is no need for correction due to variations in components and characteristics, and no adjustment is required, as compared with a method of correcting the gain by a conventional analog circuit. Moreover, the receiving device can be realized at low cost. Further, as compared with the fourth aspect, since the imbalance correction is performed by comparing the gains of the I and Q signals, there is no need to compare with the reference value, so that the calculation amount and the circuit scale can be further reduced.

According to a ninth aspect of the present invention, in the seventh aspect or the eighth aspect, the amplitude correction values of the I and Qch data output from the first multiplying means correspond to one or a plurality of reception slots. A configuration including a data holding unit that outputs the data to the second multiplication unit while holding the time is adopted.

According to this configuration, since the amplitude correction value calculated in one reception slot can be used in a plurality of reception slots, the amount of calculation can be reduced accordingly.

According to a tenth aspect of the present invention, in the second aspect, the amplitude information calculating means for calculating the amplitude values of the first I and Qch data as the second digital signal from which the DC offset component has been removed, Reciprocal calculating means for calculating the reciprocal of the amplitude value of 1Ich data;
Third multiplying means for multiplying the amplitude value of the data to obtain an amplitude correction value, and multiplying the amplitude correction value by the first Ich data to make the amplitude of the first Ich data the same as the amplitude of the first Qch data. And a fourth multiplying means for correcting.
The decoding means is configured to decode the first I and Qch data having the same amplitude.

According to this configuration, since the DC offset component can be removed by digital processing, there is no need for correction due to component variation and characteristic variation as compared with the conventional analog circuit removing method, and no adjustment is required. Since the receiver can be realized at low cost and the reception gain can be corrected by digital processing, there is no need for correction due to component variations and characteristic variations, as compared with the conventional method of correcting it with an analog circuit. The receiver can be realized without adjustment and at low cost.

According to an eleventh aspect of the present invention, in the fifth aspect, the amplitude of the I and Qch data is obtained by subtracting the minimum value from the maximum value of the I and Qch data which are digital signals from which the DC offset component has been removed. Amplitude calculating means for calculating a value, reciprocal calculating means for calculating a reciprocal of the amplitude value of the Ich data, first multiplying means for obtaining an amplitude correction value by multiplying the reciprocal and the amplitude value of the Qch data, The amplitude correction value is multiplied by the Ich data from which the DC offset component has been removed, and the amplitude of the Ich data is calculated by the DC
A second multiplying means for correcting the amplitude of the Qch data from which the offset component has been removed so as to have the same amplitude, and a decoding means for decoding the I and Qch data having the same amplitude.

According to this configuration, since the DC offset component can be removed by digital processing, there is no need for correction due to component variation and characteristic variation, compared to the conventional method of removing with an analog circuit, and no adjustment is required. Since the receiver can be realized at low cost and the reception gain can be corrected by digital processing, there is no need for correction due to component variations and characteristic variations, as compared with the conventional method of correcting it with an analog circuit. The receiver can be realized without adjustment and at low cost.

According to a twelfth aspect of the present invention, in the seventh aspect or the eighth aspect, amplifying means for amplifying a received signal before quadrature detection, and I and Qc calculated by the amplitude information calculating means.
averaging processing means for calculating an average value of the amplitude values of the h data to obtain a reception amplitude value corresponding to the level of the received signal; second reciprocal calculation means for calculating the reciprocal of the reception amplitude value; A third multiplying means for multiplying the signal level by a convergence reference value to obtain a gain correction value of the amplifying means, and a gain of the amplifying means delayed by a predetermined time to obtain a constant gain level of the amplified received signal. And a fourth multiplying means for multiplying a gain control value for controlling the gain and the gain correction value to obtain a current gain control value and outputting the current gain control value to the amplifying means.

According to this configuration, since the gain imbalance can be corrected and the reception AGC processing can be performed by the digital processing, the level of the reception signal amplified by the amplifying means can be kept constant and realized by an analog circuit. In comparison with the configuration, there is no need to consider component variations and characteristic variations, and a receiver can be realized without adjustment and at low cost.

According to a thirteenth aspect of the present invention, in the eighth aspect or the eleventh aspect, amplifying means for amplifying the received signal before the quadrature detection, and I or Q calculated by the amplitude information calculating means.
reciprocal calculating means for calculating the reciprocal of the amplitude value of the ch data;
Third multiplying means for multiplying the reciprocal by the convergence reference value to obtain a gain correction value, and multiplying a gain control value delayed for a predetermined time by the gain correction value to obtain a current gain control value; And a fourth multiplying means for outputting the result to the fourth multiplication unit.

According to this configuration, since the gain imbalance can be corrected and the reception AGC processing can be performed by digital processing, the level of the reception signal amplified by the amplifying means can be kept constant. Thus, the circuit scale can be further reduced.

The fourteenth aspect of the present invention is directed to the seventh, eighth, and twelfth embodiments.
In any one of the aspects, the amplitude information calculating means has a function of calculating the maximum value and the minimum value of the I and Qch data, and subtracting the minimum value from the maximum value to calculate the amplitude value of the I and Qch data. Take.

According to this configuration, it is possible to reduce the amount of calculation for obtaining the amplitude values of the I and Qch data.

According to a fifteenth aspect of the present invention, in any one of the twelfth aspect to the fourteenth aspect, the gain control value output from the fourth multiplying means is held for a time corresponding to one or a plurality of reception slots. While the second data holding means for outputting the data to the amplifying means is provided.

According to this configuration, since the gain control value calculated in one reception slot can be used in a plurality of reception slots, the amount of calculation can be reduced accordingly.

According to a sixteenth aspect of the present invention, a transmitting / receiving apparatus comprises:
A configuration including the receiving device according to any of the first to fifteenth aspects is employed.

According to this configuration, the transmitting / receiving device can obtain the operation and effect described in any of the first to fifteenth aspects.

According to a seventeenth aspect of the present invention, in the sixteenth aspect, a mapping means for mapping transmission data to encoded data for transmission, and a D / A for converting the mapped encoded data into an analog signal. The transmission device includes a conversion unit and a modulation unit that modulates the analog signal to convert the analog signal into a modulation signal.

According to this configuration, the transmission / reception device including the transmission device that converts the mapped data into an analog signal and modulates the same can obtain the operation and effect according to any one of the first to sixteenth aspects. Can be.

According to an eighteenth aspect of the present invention, a base station apparatus comprises:
A configuration including the receiving device according to any of the first to fifteenth aspects is employed.

According to this configuration, it is possible for the base station apparatus to obtain the functions and effects described in any of the first to fifteenth aspects.

A nineteenth aspect of the present invention provides a mobile station
A configuration including the receiving device according to any of the first to fifteenth aspects is employed.

According to this configuration, the mobile station apparatus can obtain the operation and effect according to any one of the first to fifteenth aspects.

A twentieth aspect of the present invention employs a configuration in which the receiving apparatus according to any one of the first to fifteenth aspects is provided in a base station apparatus or a mobile station apparatus of a mobile communication system.

According to this configuration, the mobile communication system can obtain the effects described in any of the first to fifteenth aspects.

According to a twenty-first aspect of the present invention, the base station apparatus comprises:
The transmission / reception device according to the sixteenth aspect is provided.

According to this configuration, the base station apparatus can obtain the function and effect described in the sixteenth aspect.

According to a twenty-second aspect of the present invention, the mobile station apparatus comprises:
The transmission / reception device according to the sixteenth aspect is provided.

According to this configuration, the mobile station apparatus can obtain the operation and effect described in the sixteenth aspect.

A twenty-third aspect of the present invention employs a configuration in which the receiving apparatus according to the sixteenth aspect is provided in a base station apparatus or a mobile station apparatus of a mobile communication system.

According to this configuration, the mobile communication system can obtain the operation and effect described in the sixteenth aspect.

According to a twenty-fourth aspect of the present invention, a received signal is converted into a digital signal, and a reference value of the average value is subtracted from an average value of the digital signal for a predetermined time to obtain a DC offset value. The value is added to the DC offset correction value of the digital signal obtained at the previous reception timing to obtain the DC offset correction value at the current reception timing, and a value obtained by delaying the DC offset correction value by a predetermined time from the digital signal at the current reception timing is obtained. Subtract and DC
The offset component is removed, and the digital signal from which the DC offset component has been removed is decoded.

According to this method, since the DC offset component can be removed by digital processing, there is no need for correction due to component variation and characteristic variation, and no adjustment is required, as compared with the conventional method of removing with an analog circuit. A receiving device can be realized at low cost.

According to a twenty-fifth aspect of the present invention, the received signal is transmitted to the first
The digital signal is converted into a digital signal, a first DC offset correction value for removing a DC offset component is subtracted from the first digital signal to obtain a second digital signal, and the second digital signal is averaged from a result obtained by adding the second digital signal for a predetermined time. Calculating a DC offset value by subtracting a reference value of the average value from the average value, and adding the DC offset value to the first DC offset correction value to obtain a second DC offset correction value. The first DC offset correction value is obtained by delaying the 2DC offset correction value.
The second digital signal from which the DC offset component has been removed by the DC offset correction value is decoded.

According to this method, since the DC offset component can be removed by digital processing, there is no need for correction due to component variation and characteristic variation as compared with the conventional method of removing with an analog circuit, and no adjustment is required. A receiving device can be realized at low cost.

According to a twenty-sixth aspect of the present invention, in the twenty-fifth aspect, the first DC offset correction value is obtained by delaying the second DC offset correction value by one or more reception slots.

According to this method, the DC offset correction value calculated over a plurality of reception slots can be used.

According to a twenty-seventh aspect of the present invention, in the twenty-fifth aspect or the twenty-sixth aspect, the maximum value of the second digital signal is replaced by calculating the average value from the result of adding the second digital signal for a fixed time. The average value was calculated from the value and the minimum value.

According to this method, the amount of calculation for removing the DC offset component can be reduced.

According to a twenty-eighth aspect of the present invention, a received signal is converted into a digital signal, an average value is calculated from the maximum value and the minimum value of the digital signal, and a reference value of the average value is subtracted from the average value. The DC offset value is obtained by subtracting the DC offset value from the digital signal to remove the DC offset component, and the digital signal from which the DC offset component has been removed is decoded.

According to this method, as compared with the method of removing with a conventional analog circuit, there is no need for correction due to component variation and characteristic variation, and a receiver can be realized without adjustment and at low cost. Further reduction in the amount of computation,
In addition, the circuit scale can be reduced.

According to a twenty-ninth aspect of the present invention, in the twenty-eighth aspect, the DC offset value is held for a time corresponding to one or more reception slots, and the held DC offset value is subtracted from the digital signal to obtain a DC offset. The offset component is removed.

According to this method, since the DC offset value calculated in one reception slot can be used in a plurality of reception slots, the amount of calculation can be reduced accordingly.

According to a thirtieth aspect of the present invention, a received signal is converted into digital I and Qch data,
The amplitude values of the h data are calculated, the reciprocals of the I and Q channel data are calculated, and the reciprocals of the I and Q channel data are multiplied by the same reference value to obtain an amplitude correction value. Is multiplied by the I and Qch data to correct the amplitude of the Ich data to be the same as the amplitude of the Qch data, and decode the I and Qch data having the same amplitude.

According to this method, since the reception gain can be corrected by digital processing, there is no need for correction due to variations in components and characteristics, and no adjustment is required, as compared with a method of correcting the gain by a conventional analog circuit. Moreover, the receiving device can be realized at low cost.

A thirty-first aspect of the present invention converts a received signal into digital I and Qch data,
h, the reciprocal of the Ich data, and the reciprocal of the Ich data and the Qch
The amplitude correction value is obtained by multiplying the amplitude correction value by the data, and the amplitude correction value is multiplied by the Ich data to correct the amplitude of the Ich data to be equal to the amplitude of the Qch data.
The I and Qch data having the same amplitude are decoded.

According to this method, since the reception gain can be corrected by digital processing, there is no need for correction due to variations in components and characteristics, and no adjustment is required, as compared with a method of correcting the gain by a conventional analog circuit. Moreover, the receiving device can be realized at low cost. Further, as compared with the twenty-seventh aspect, since the imbalance correction is performed by comparing the gains of the I and Q signals, there is no need to compare with the reference value, so that the calculation amount and the circuit scale can be further reduced.

According to a thirty-second aspect of the present invention, in the thirty-third aspect or the thirty-first aspect, the amplitude correction values of the I and Qch data are held for a time corresponding to one or a plurality of reception slots, and The amplitude of the Ich data is corrected to the same value as the amplitude of the Qch data using the correction value.

According to this method, since the amplitude correction value calculated in one reception slot can be used in a plurality of reception slots, the amount of calculation can be reduced accordingly.

According to a thirty-third aspect of the present invention, in the twenty-fifth aspect, the amplitude values of the first I and Q channel data, which are the second digital signals from which the DC offset component has been removed, are calculated. Is calculated by multiplying this reciprocal by the amplitude value of the Qch data to obtain an amplitude correction value. The amplitude correction value is multiplied by the first Ich data to obtain the amplitude of the first Ich data in the first Qc.
The correction is made to be the same as the amplitude of the h data, and the first I and Qch data having the same amplitude are decoded.

According to this method, since the DC offset component can be removed by digital processing, there is no need for correction due to component variation and characteristic variation as compared with the conventional method of removing with an analog circuit, and no adjustment is required. Since the receiver can be realized at low cost and the reception gain can be corrected by digital processing, there is no need for correction due to component variations and characteristic variations, as compared with the conventional method of correcting it with an analog circuit. The receiver can be realized without adjustment and at low cost.

According to a thirty-fourth aspect of the present invention, in the twenty-eighth aspect, the minimum value is subtracted from the maximum value of the I and Qch data, which is a digital signal from which the DC offset component has been removed, and the amplitude of the I and Qch data is reduced. Calculate the value and calculate this I
The reciprocal of the amplitude value of the ch data is calculated, and the reciprocal and the Q
The amplitude correction value is obtained by multiplying the amplitude correction value by the amplitude value of the channel data.
The amplitude of the Ich data is corrected to be the same as the amplitude of the Qch data from which the DC offset component has been removed by multiplying the Ich data by the channel data, and the I and Qch data having the same amplitude are decoded.

According to this method, since the DC offset component can be removed by digital processing, there is no need for correction due to component variation and characteristic variation, as compared with the conventional analog circuit removing method. Since the receiver can be realized at low cost and the reception gain can be corrected by digital processing, there is no need for correction due to component variations and characteristic variations, as compared with the conventional method of correcting it with an analog circuit. The receiver can be realized without adjustment and at low cost.

According to a thirty-fifth aspect of the present invention, in the thirty-third aspect or the thirty-first aspect, a reception signal before quadrature detection is amplified, and an average value of amplitude values of I and Qch data is calculated and received. A reception amplitude value corresponding to the signal level is obtained, and a reciprocal of the reception amplitude value is multiplied by a convergence reference value for converging the level of the reception signal to obtain a gain correction value at the time of the amplification. The current gain control value is obtained by multiplying the gain at the time of amplification by a gain control value for controlling the level of the amplified reception signal to be constant and the gain correction value, and the obtained gain control value is obtained. Controls the gain at the time of amplification.

According to this method, since the gain imbalance can be corrected and the reception AGC processing can be performed by digital processing, the level of the reception signal amplified by the amplifying means can be kept constant and realized by an analog circuit. In comparison with the configuration, there is no need to consider component variations and characteristic variations, and a receiver can be realized without adjustment and at low cost.

According to a thirty-sixth aspect of the present invention, in the thirty-first or thirty-fourth aspect, a received signal before quadrature detection is amplified, and a reciprocal of an amplitude value of I or Qch data and a convergence reference value are determined. A gain correction value is obtained by multiplication, a gain control value delayed for a predetermined time is multiplied by the gain correction value to obtain a current gain control value, and the gain at the time of amplification is controlled by the obtained gain control value. I did it.

According to this method, the correction of the gain imbalance and the reception AGC processing can be performed by the digital processing, so that the level of the reception signal amplified by the amplifying means can be kept constant. Thus, the circuit scale can be further reduced.

The thirty-seventh aspect of the present invention provides the thirty-seventh, thirty-first,
In any one of the thirty-fifth modes, when calculating the amplitude values of the I and Qch data, the maximum value and the minimum value of the I and Qch data are obtained, and the minimum value is subtracted from the maximum value to calculate the I and Qch data. The amplitude value was calculated.

According to this method, it is possible to reduce the amount of calculation for obtaining the amplitude values of the I and Qch data.

According to a thirty-eighth aspect of the present invention, in any one of the thirty-fifth to thirty-seventh aspects, the gain control value is held for a time corresponding to one or more reception slots, and the held gain control value is held. Controls the gain at the time of amplification.

According to this method, since the gain control value calculated in one reception slot can be used in a plurality of reception slots, the amount of calculation can be reduced accordingly.

According to a thirty-ninth aspect of the present invention, there is provided a transmitting / receiving method comprising:
The receiving method according to any one of the twenty-fourth to thirty-eighth aspects is used.

According to this method, the transmission / reception device is defined in claim 2
The functions and effects described in any of the fourth to thirty-eighth aspects can be obtained.

According to a fortieth aspect of the present invention, in the thirty-ninth aspect, transmission data is mapped to encoded data for transmission, the mapped encoded data is converted into an analog signal, and the analog signal is modulated. To convert it into a modulated signal.

According to this method, the transmission / reception device provided with the transmission device for converting the mapped data into an analog signal and modulating the data can obtain the effects described in the thirty-ninth aspect.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1) FIG.1 is a block diagram showing a configuration of a transmitting / receiving apparatus according to Embodiment 1 of the present invention.

The first embodiment is characterized in that the received signal is converted into digital I and Qch signals (I and Qch data), and the I and Qch data are converted into DC data from the average value of the I and Qch data over a certain period of time. A DC offset value is obtained by subtracting a reference value which is an average value obtained in a state where there is no offset component, and this DC offset value is added to a DC offset correction value of I and Qch data obtained at the previous reception timing. The DC offset correction value of the current reception timing is obtained, and the DC offset of the I and Qch data of the current reception timing is corrected by a value obtained by delaying the DC offset correction value by a predetermined time.
The point is that data is configured to be decoded.

The transmitting / receiving apparatus 100 shown in FIG.
01 and the transmission unit 102, and the reception unit 101 and the transmission unit 10
2 includes a shared antenna 103 for transmission and reception and a duplexer 104 for switching between transmission and reception.

The receiving section 101 includes a detector 105 and an A / D
Transformers 106 and 107, subtractors 108 and 109, average value calculators 111 and 112, decoder 110, subtractors 113 and 114, reference value stores 115 and 116, and adders 117 and 118. , And delay units 119 and 120.

The transmitting section 102 includes a mapping unit 121,
It is configured to include D / A converters 122 and 123 and a modulator 124.

The detector 105 of the receiving section 101 performs quadrature detection of the signal received by the antenna 103, and converts the I and Qch signals obtained thereby into A / D converters 106 and 107.
Output to A / D converters 106 and 107
Converts the I and Qch signals into digital signals and subtracts the converted I and Qch data into subtracters 108 and 109
Output to

The subtractors 108 and 109 subtract the DC offset correction values output from the delay units 119 and 120 from the I and Qch data, and output the results to the decoder 110 and the average value calculators 111 and 112. Things.

The average calculators 111 and 112 calculate I and Q
Add the ch data for a certain period of time, calculate the average value,
This average value is output to the subtractors 113 and 114.

The subtractors 113 and 114 subtract a reference value, which is an average value obtained without the DC offset component in the I and Qch data stored in the reference value storage units 115 and 116, from the average value. To obtain a DC offset value, and outputs this value to the adders 117 and 118.

Adders 117 and 118 are provided with delay units 119 and
The DC offset correction value before delay is obtained by adding the DC offset value to the DC offset correction value output from 120, and is output to the delay units 119 and 120.

The delay units 119 and 120 obtain a DC offset correction value by delaying the DC offset correction value by a predetermined time, and output the DC offset correction value to the subtractors 108 and 109 and the adders 117 and 118. Things.

The decoder 110 is connected to the A / D converter 10
6 and 107 to obtain decoded data by decoding the I and Qch data.

The mapping unit 121 of the transmitting unit 102 maps transmission data to I and Qch encoded data for transmission, and outputs the obtained I and Qch data to the D / A converters 122 and 123. Things.

The D / A converters 122 and 123 provide I and Q
The channel data is converted into an analog signal and output to the modulator 124. The modulator 124 orthogonally modulates the analog signal and outputs the modulated signal to the duplexer 104.

In such a configuration, in the receiving section 101, component variations of the detector 105, temperature characteristics, reception I
And a DC offset component is superimposed on the I and Qch signals due to a difference between the Qch signal and the reference voltages of the A / D converters 106 and 107.

This superimposed DC offset component leads to deterioration of the reception characteristics, and therefore needs to be removed. As described above, the average value of the I and Qch data is calculated by the average value calculators 111 and 112 and subtracted from the reference value by the subtracters 113 and 114 to obtain the DC offset amount. It is calculated as a value.

Here, the average value Save in the average value calculators 111 and 112 is calculated by the following equation (1), where Sk is the digitized I and Qch data.

[0120]

(Equation 1) Next, the DC offset value is added to adders 117 and 11.
At 8, the DC offset correction value that is currently set is added. As a result, the DC offset correction value to be set next is obtained.

This DC offset correction amount is delayed by delay units 119 and 120 so as to be used in the next reception slot, whereby the DC offset component is removed from the I and Qch data in the next reception slot. The I and Qch data from which the DC offset has been removed is input to the decoder 110, where it is converted into decoded data.

The reception timing in the above description is based on PHS (Personal Handyphone System) as shown in FIG.
tem) is assumed.

In this case, as shown in FIG. 2, the DC offset amount (DC offset value) calculated in the previous reception slot A is corrected in the next reception slot B. Also, since the DC offset fluctuation fluctuates in a sufficiently long time with respect to the received frame, the DC offset amount calculated over a plurality of slots is not calculated for each slot, but the DC offset amount calculated over a plurality of slots is calculated between the plurality of slots. It is also possible to use.

On the other hand, in transmitting section 102, transmission data to be transmitted is mapped to I and Q encoded signals (I and Qch data) to be transmitted in mapping section 121, and D / A converters 122 and 123. Is converted to an analog signal.

[0125] The converted I and Qch signals are quadrature-modulated by modulator 124 to obtain a transmission radio signal. The transmission radio signal is transmitted from the antenna 103 via the duplexer 104 by radio waves.

As described above, according to the transmitting / receiving apparatus of the first embodiment, the receiving apparatus (receiving section 101) converts the received signal into a digital signal, that is, I and Qch data, and
From the average value of Qch data for a certain period of time, I and Qc
The DC offset value is obtained by subtracting a reference value which is an average value obtained in a state where the h data has no DC offset component. To obtain the DC offset correction value of the current reception timing, and correct the DC offset of the I and Qch data of the current reception timing by a value obtained by delaying the DC offset correction value by a predetermined time. Is configured to be decoded.

As a result, D
Since the C offset component can be removed, there is no need for correction due to component variations and characteristic variations as compared with the conventional method of removing with an analog circuit, and a receiver can be realized without adjustment and at low cost.

(Embodiment 2) FIG.3 is a block diagram showing a configuration of a transmission / reception apparatus according to Embodiment 2 of the present invention. However, in the second embodiment shown in FIG. 3, portions corresponding to the respective portions of the first embodiment in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

The features of the second embodiment are the same as those of the first embodiment.
And the function of calculating the average value.

Transmission / reception apparatus 30 according to the second embodiment shown in FIG.
0 is different from the transmitting / receiving apparatus 100 according to the first embodiment.
Average calculator 11 in receiving section 101 shown in FIG.
1 and 112, a receiving unit 301 as shown in FIG.
In addition, the configuration is provided with maximum / minimum value calculators 302 and 303 and average value calculators 304 and 305.

In such a configuration, the maximum / minimum value calculators 302 and 303 calculate the maximum value and the minimum value in a predetermined section of the I and Qch data, and output these to the average value calculators 304 and 305. . Average value calculator 304,3
05 calculates the average value from the maximum value and the minimum value, and outputs the average value to the subtractors 113 and 114. Subsequent operations are the same as those described in the first embodiment.

As described above, according to the transmitting / receiving apparatus of the second embodiment, in the first embodiment, in order to calculate the average value of I and Qch data, it is necessary to perform cumulative addition and further perform division. In the second embodiment, after calculating the maximum value and the minimum value of the I and Qch data, the average value may be calculated by obtaining an intermediate value between them. Since this can be realized by the shift configuration, the same effect as in the first embodiment can be obtained, and the amount of calculation can be reduced as compared with the first embodiment.

(Embodiment 3) FIG.4 is a block diagram showing a configuration of a transmitting and receiving apparatus according to Embodiment 3 of the present invention. However, in the third embodiment shown in FIG. 4, portions corresponding to the respective portions of the second embodiment in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.

A feature of the third embodiment is that a DC offset value is obtained by subtracting a reference value from an average value corresponding to a DC offset value in I and Qch data after A / D conversion. And by subtracting the DC offset component from the Qch data.

The transmitting / receiving apparatus 40 according to the third embodiment shown in FIG.
0 is different from the transmitting / receiving apparatus 300 according to the second embodiment.
As shown in FIG. 4, in the receiving section 401, the maximum / minimum value calculators 302 and 303 and the average value calculator 30 described in the second embodiment are provided on the output sides of the A / D converters 106 and 107.
4,305, reference value storage units 115 and 116, and subtractor 1
13 and 114, and between the subtracters 113 and 114 and the subtracters 108 and 109, the data holders 402 and 40 are connected.
3 are connected.

In such a configuration, the maximum / minimum value calculators 302 and 303 include the A / D converters 106 and 107.
The maximum value and the minimum value in a predetermined section of the I and Qch data output from are calculated, and this is calculated by the average value calculator 304,
Output to 305.

The average value calculators 304 and 305 calculate the average value from the maximum value and the minimum value, and subtract
Output to 4.

The subtractors 113 and 114 subtract a reference value, which is an average value obtained without the DC offset component in the I and Qch data stored in the reference value storage units 115 and 116, from the average value. To obtain a DC offset value, and output this to the data holders 402 and 403.

The data holders 402 and 403 have their DC
The offset value is held and output to the subtracters 108 and 109. Here, the holding time may be a time corresponding to one to a plurality of reception slots.

Then, the DC offset component can be removed by subtracting the DC offset value from the I and Qch data by the subtracters 108 and 109.

As described above, according to the transmitting / receiving apparatus of the third embodiment, the receiving apparatus (receiving section 401) calculates the average value corresponding to the DC offset value in the I / Q channel data after A / D conversion. The DC offset value is obtained by subtracting the reference value from the average value, and the DC offset component is removed by subtracting the DC offset value from the I and Qch data.

As a result, D
Since the C offset component can be removed, there is no need for correction due to component variations and characteristic variations as compared with the conventional method of removing with an analog circuit, and a receiver can be realized without adjustment and at low cost. Embodiment 2
It is possible to further reduce the amount of calculation and the circuit size as compared with the receiving device of the first embodiment.

(Embodiment 4) FIG.5 is a block diagram showing a configuration of a transmitting and receiving apparatus according to Embodiment 4 of the present invention. However, in the fourth embodiment shown in FIG. 5, portions corresponding to the respective portions of the first embodiment in FIG. 1 are denoted by the same reference numerals.

The feature of the fourth embodiment is that the received signal is subjected to quadrature detection, converted into I and Qch data of a digital signal, the amplitude values of the converted I and Qch data are calculated, and the amplitude values of the respective amplitude values are further calculated. The reciprocals are calculated, and the amplitude correction values of the I and Qch data are multiplied by the respective amplitude correction values obtained by multiplying each reciprocal by the same reference value with the I and Qch data.

The transmitting / receiving apparatus 50 according to the fourth embodiment shown in FIG.
At 0, the transmitting unit 102 has the same configuration as in the first embodiment, and a description thereof will be omitted here.

The receiving section 501 is provided with a detector 105 and an A / D
Transformers 106 and 107, decoder 110, amplitude information calculators 502 and 503, reciprocal calculators 504 and 505,
It comprises multipliers 506 and 507, a reference value storage 508, data holders 509 and 510, and multipliers 511 and 512.

The amplitude information calculators 502 and 503 determine whether the A / D
The amplitude values Ki and Kq of the I and Qch data output from the converters 106 and 107 are calculated, and the amplitude values Ki and Kq are output to the reciprocal calculators 504 and 505.

The reciprocal calculator 504 calculates the reciprocal 1 of the amplitude value Ki.
/ Ki, and outputs the reciprocal 1 / Ki to the multiplier 506. The reciprocal calculator 505 calculates the reciprocal 1 / Kq of the amplitude value Kq.
, And outputs the reciprocal 1 / Kq to the multiplier 507.

Multiplier 506 multiplies the reference value for equalizing the amplitudes of the I and Qch data stored in reference value storage 508 by the reciprocal 1 / Ki of the amplitude value, and obtains the result of this multiplication. The one amplitude correction value is output to the data holding unit 509, the multiplier 507 multiplies the reference value by the reciprocal 1 / Kq of the amplitude value, and outputs the second amplitude correction value that is the result of the multiplication to the data holding unit 510. Is what you do.

The data holders 509 and 510 hold the first and second amplitude correction values and output them to the multipliers 511 and 512.

Multipliers 511 and 512 multiply the I and Qch data by the first and second amplitude correction values, and output the multiplied values to decoder 110.

In such a configuration, in the detector 105, the received I and Q channel signals have an imbalance in gain due to component variations, temperature characteristics, and the like. As a result, the amplitude of the quadrature detected I and Q channel signals is increased. Are unbalanced, and the I and Qch data digitized by the A / D converters 106 and 107 at the subsequent stage are also amplitude unbalanced. Since this amplitude imbalance leads to deterioration of the reception characteristics, it is necessary to remove it.

The I and Qch data output from A / D converters 106 and 107 are input to multipliers 511 and 512 and amplitude information calculators 502 and 503. , I and Qch data are calculated.

In the calculation of the amplitude values Ki and Kq, for example, when a non-modulated signal is received by the antenna 103, the relationship between the amplitude of the received signal and the effective value is directly proportional, so that the effective value must be calculated. As a result, amplitude values Ki and Kq are obtained. Taking the Ich data Sk as an example, the effective value Sr
Can be calculated by the following equation (2).

[0155]

(Equation 2) The amplitude values Ki = “10”, Kq =
Let it be "11". This amplitude value Ki = “10”, Kq =
"11" is calculated by the reciprocal calculators 504 and 505.
Ki = “1/10” and 1 / Kq = “1/11” are calculated.

Next, the calculated reciprocals “1/10” and “1/11” are multiplied by multipliers 507 and 508 with a reference value of, for example, “2”.
First and second amplitude correction values of “10” and “2/11” are calculated. The first and second amplitude correction values “2/10” and “2/11” are held in data holders 509 and 510 and output to multipliers 511 and 512.

In the multiplier 511, the Ich data “10”
Is multiplied by the first amplitude correction value “2/10” and the Ich data of the amplitude value “2” corrected by the decoder 1
It is output to 10.

In multiplier 512, Qch data “11”
Is multiplied by the second amplitude correction value “2/11” and the Qch data of the amplitude value “2” corrected by the decoder 1
It is output to 10.

That is, I and Q having the same amplitude value “2”
The ch data is output to the decoder 110, where it is decoded to obtain decoded data.

As described above, according to the transmitting / receiving apparatus of the fourth embodiment, the receiving apparatus (receiving section 501) performs quadrature detection on the received signal to convert the signal into I and Qch data of a digital signal. And Qch data, and further calculates the reciprocal of each amplitude value, and multiplies each reciprocal by the same reference value with each of the amplitude correction values obtained by multiplying the I and Qch data by I and Qch data. It was configured to perform data amplitude correction.

As a result, since the reception gain can be corrected by digital processing, there is no need for correction due to component variations and characteristic variations, compared with a conventional method of correcting the gain using an analog circuit, and there is no need for adjustment and at low cost. A receiving device can be realized.

(Embodiment 5) FIG.6 is a block diagram showing a configuration of a transmitting and receiving apparatus according to Embodiment 5 of the present invention. However, in the fifth embodiment shown in FIG. 6, parts corresponding to the respective parts of the fourth embodiment in FIG. 5 are denoted by the same reference numerals.

The fifth embodiment is characterized in that a received signal is subjected to quadrature detection, converted into I and Q channel data of a digital signal, and the amplitude values of the converted I and Q channel data are calculated. Is calculated by calculating the reciprocal of the amplitude value of Ich data and multiplying the reciprocal by the amplitude value of the Qch data with the Ich data to make the amplitude of the Ich data the same as that of the Qch data. It is in the point which did.

Transmission / reception apparatus 60 according to the fifth embodiment shown in FIG.
0 receiving unit 601 includes the detector 105 and the A / D converter 1
06, 107, the decoder 110, and the amplitude information calculator 50
2, 503, a reciprocal calculator 504, a multiplier 506,
It comprises a data holder 509 and a multiplier 511.

The amplitude information calculators 502 and 503 determine whether the A / D
The amplitude values Ki and Kq of the I and Qch data output from the converters 106 and 107 are calculated.

The reciprocal calculator 504 calculates the reciprocal 1 of the amplitude value Ki.
/ Ki.

The multiplier 506 calculates the amplitude value K of the Qch data.
q is multiplied by the reciprocal 1 / Ki of the Ich data, and the result of the multiplication is output to the data holder 509.

The data holding unit 509 holds the amplitude correction value and outputs it to the multiplier 511.

The multiplier 511 multiplies the Ich data by the amplitude correction value, and outputs the multiplied value to the decoder 110.

In such a configuration, the A / D converter 1
The I and Qch data output from 06 and 107 are input to amplitude information calculators 502 and 503, where the amplitude values Ki and Kq of the I and Qch data are calculated.

The thus calculated amplitude value Ki = “1”
1 "and Kq =" 12 ". The reciprocal 1 / Ki = “1/11” is calculated by the reciprocal calculator 504 for the amplitude value Ki = “11” of the Ich data.

Next, the calculated reciprocal “1/11” is multiplied by the multiplier 506 with the amplitude value Kq of the Qch data = “1”.
2 ”and the resulting amplitude correction value of“ 12/11 ”is held in the data holding unit 509 and the multiplier 5
11 is output.

In the multiplier 511, the Ich data “11”
Is multiplied by the amplitude correction value “12/11”, whereby the amplitude value of the Ich data is corrected to “12”. That is, the amplitude is the same as the amplitude value “12” of the Qch data.

I and Qc having the same amplitude value “12”
The h data is output to the decoder 110, where it is decoded to obtain decoded data.

As described above, according to the transmitting / receiving apparatus of the fifth embodiment, the receiving apparatus (receiving section 601) performs quadrature detection on the received signal to convert the signal into I and Qch data of a digital signal. And the amplitude value of the Qch data, the reciprocal of the amplitude value of the Ich data is calculated, and the Ich data is multiplied by the amplitude correction value obtained by multiplying the reciprocal by the amplitude value of the Qch data. Is made to make the amplitude of the same as that of the Qch data.

As a result, since the reception gain can be corrected by digital processing, there is no need for correction due to component variations and characteristic variations as compared with a method of correcting the same by a conventional analog circuit, and there is no adjustment and low cost. A receiving device can be realized. Further, as compared with the receiving apparatus according to the fourth embodiment, since the imbalance correction is performed by comparing the gains of the I and Q signals, there is no need to compare with the reference value, so that the calculation amount and the circuit scale can be further reduced.

(Embodiment 6) FIG.7 is a block diagram showing a configuration of a transmitting / receiving apparatus according to Embodiment 6 of the present invention. However, in the sixth embodiment shown in FIG. 7, parts corresponding to the respective parts of the fifth embodiment in FIG. 6 are denoted by the same reference numerals, and description thereof will be omitted.

The sixth embodiment differs from the fifth embodiment in that the amplitude information calculators 502 and 503 are replaced by the maximum value /
The point is that it comprises minimum value calculators 702 and 703 and maximum value / minimum value subtractors 704 and 705.

The maximum / minimum value calculators 702 and 703 are
I and Qc output from A / D converters 106 and 107
The maximum value and the minimum value in each predetermined section of the h data are calculated and output to the maximum value / minimum value subtractors 704 and 705.

The maximum / minimum value subtractors 704 and 705
By subtracting the minimum value from the maximum value, the amplitude values Ki and Kq of the I and Qch data are calculated. Subsequent operations are the same as those described in the fifth embodiment, and a description thereof will not be repeated.

As described above, according to the transmitting / receiving apparatus of the sixth embodiment, the receiving apparatus (receiving section 601) performs quadrature detection on the received signal to convert the signal into I and Qch data of a digital signal. And the amplitude value of the Qch data is calculated from the maximum value and the minimum value. Of these, the reciprocal of the amplitude value of the Ich data is calculated, and the amplitude correction value obtained by multiplying the reciprocal by the amplitude value of the Qch data is calculated as , The amplitude of the Ich data is made equal to that of the Qch data.

As a result, since the reception gain can be corrected by digital processing, there is no need for correction due to component variations and characteristic variations, compared with a conventional method of correcting the gain by an analog circuit, and there is no need for adjustment and at low cost. A receiving device can be realized. Further, the amount of calculation and the circuit scale can be reduced as compared with the amplitude information calculator of the fifth embodiment.

(Embodiment 7) FIG.8 is a block diagram showing a configuration of a transmitting and receiving apparatus according to Embodiment 7 of the present invention. However, in the seventh embodiment shown in FIG. 8, parts corresponding to those in the first embodiment in FIG. 1 and the fifth embodiment in FIG. 6 are denoted by the same reference numerals.

The feature of the seventh embodiment is that the receiving section 801
In addition, the DC of the I and Qch data described in the first embodiment
The point is that the function of removing the offset component is combined with the function of making the amplitude values of the I and Qch data the same as described in the fifth embodiment.

That is, the receiving section 801 shown in FIG. 8 includes a detector 105, A / D converters 106 and 107, and a subtractor 10
8, 109, average value calculators 111 and 112, decoder 110, subtractors 113 and 114, and reference value storage 11
5, 116, adders 117, 118, and delay unit 11
9, 120, and amplitude information calculators 502,
503, a reciprocal calculator 504, a multiplier 506, a data holder 509, and a multiplier 511.

In such a configuration, the average value calculator 1
11, 112, the average value of the I and Qch data output from the A / D converters 106, 107 is calculated,
The DC offset value is calculated by subtraction from the reference value by the subtractors 113 and 114.

This DC offset value is added to the adder 117,
At 118, it is added to the currently set DC offset correction value. As a result, the DC offset correction value to be set next is obtained.

This DC offset correction amount is delayed by delay units 119 and 120 so as to be used in the next reception slot, whereby the DC offset component is removed from the I and Qch data in the next reception slot.

The I and Q channel data from which the DC offset has been removed are input to amplitude information calculators 502 and 503, where amplitude values Ki and Kq of the I and Q channel data are calculated.

The calculated amplitude value Ki = “11”, K
It is assumed that q = “12”. Among them, the amplitude value K of the Ich data
i = “11” is calculated by the reciprocal calculator 504 using the reciprocal 1 / Ki
= “1/11” is calculated.

Next, the calculated reciprocal “1/11” is multiplied by the multiplier 506 with the amplitude value Kq of the Qch data = “1”.
2 ”and the resulting amplitude correction value of“ 12/11 ”is held in the data holding unit 509 and the multiplier 5
11 is output.

In the multiplier 511, the Ich data “11”
Is multiplied by the amplitude correction value “12/11”, whereby the amplitude value of the Ich data is corrected to “12”. That is, the amplitude is the same as the amplitude value “12” of the Qch data.

I and Qc having the same amplitude value “12”
The h data is output to the decoder 110, where it is decoded to obtain decoded data.

As described above, according to the transmitting / receiving apparatus of the seventh embodiment, the receiving apparatus (receiving section 801) is provided with the function of deleting the DC offset components of the I and Qch data described in the first embodiment, and The function for making the amplitude values of the I and Qch data the same as described in the fifth embodiment is also combined.

As a result, D
Since the C offset component can be removed, there is no need for correction due to component variations and characteristic variations as compared with the conventional method of removing with an analog circuit, and a receiver can be realized without adjustment and at low cost.

Further, since the reception gain can be corrected by digital processing, there is no need for correction due to component variations and characteristic variations, compared with a conventional method of correcting the gain using an analog circuit, and there is no need for adjustment and low-cost reception. The device can be realized.

(Embodiment 8) FIG.9 is a block diagram showing a configuration of a transmission / reception apparatus according to Embodiment 8 of the present invention. However, in the eighth embodiment shown in FIG. 9, parts corresponding to those in the sixth embodiment in FIG. 7 are denoted by the same reference numerals.

The eighth embodiment is different from the sixth embodiment in that the functions of the sixth embodiment for making the amplitude values of the I and Qch data the same are provided by the average value calculators 304 and 305, the subtractor 113, 114, reference value storage units 115 and 116,
D of I and Qch data by subtractors 108 and 109
The point is that the configuration is added with a function of deleting the C offset component.

In such a configuration, the maximum / minimum value calculators 702 and 703 are provided with A / D converters 106 and 107.
Calculate the maximum value and the minimum value of each of the I and Qch data output from the predetermined section in the predetermined section, and divide them by the maximum value / minimum value subtractors 704, 705 and the average value calculators 304, 305.
Output to

Average value calculators 304 and 305 calculate the average value from the maximum value and the minimum value, and subtracters 113 and 11 calculate the average value.
Output to 4.

The subtractors 113 and 114 subtract a reference value, which is an average value obtained without the DC offset component in the I and Qch data stored in the reference value storage units 115 and 116, from the average value. To obtain the DC offset value, and outputs this to the subtracters 108 and 109.

The subtractors 108 and 109 subtract the DC offset value from the I and Qch data to obtain a DC offset.
Remove the offset component.

The maximum / minimum value subtracters 704 and 705
By subtracting the minimum value from the maximum value, the amplitude values Ki and Kq of the I and Qch data are calculated.

The thus calculated amplitude values Ki and Kq
Of the Ich data, the reciprocal calculator 504
, The reciprocal 1 / Ki is calculated.

Next, the calculated reciprocal is multiplied by the amplitude value Kq of the Qch data by the multiplier 506, and the resulting amplitude correction value is held in the data holder 509 and output to the multiplier 511. You.

Multiplier 511 multiplies the Ich data from which the DC offset component has been removed by the amplitude correction value to make the amplitude value of the Ich data the same as the amplitude value of the Qch data from which the DC offset component has been removed. Become.

The I and Qch data having the same amplitude value and from which the DC offset component has been removed is output to the decoder 110, where it is decoded to obtain decoded data.

As described above, according to the transmitting / receiving apparatus of the eighth embodiment, the receiving apparatus (receiving section 801) is provided with the function of making the amplitude values of the I and Qch data the same as those of the sixth embodiment. And a function of deleting the DC offset component of.

As a result, D is obtained by digital processing.
Since the C offset component can be removed, there is no need for correction due to component variations and characteristic variations as compared with the conventional analog circuit removing method, and a receiver can be realized without adjustment and at low cost. In addition, since the reception gain can be corrected by digital processing, compared to the conventional method of correcting the gain using an analog circuit, component variations,
There is no need for correction due to characteristic variations, and a receiver can be realized at low cost without adjustment.

Further, since the maximum value minimum value calculation means for DC offset calculation and amplitude calculation can be shared,
A further reduction in the amount of calculation compared to the receiving apparatus described in Embodiment 7,
Circuit size can be reduced.

(Embodiment 9) FIG.10 is a block diagram showing a configuration of a transmitting / receiving apparatus according to Embodiment 9 of the present invention. However, in the ninth embodiment shown in FIG.
The same reference numerals are given to portions corresponding to the respective portions of the fourth embodiment.

The feature of the ninth embodiment is that
The configuration of the above, adding amplification means for amplifying the received signal before detection, the gain control of the amplification means for maintaining the amplitude of the amplified signal output from this amplification means constant,
I and Q output from amplitude information calculators 502 and 503
The point is that the amplitude of the detected I and Q channel signals is kept constant by performing digital processing using the amplitude values Ki and Kq of the ch data.

The transmitting / receiving apparatus 1 according to the ninth embodiment shown in FIG.
000, the transmission unit 102 has the same configuration as in the first embodiment, and a description thereof will be omitted here.

The receiving section 1001 includes an RF section 1002, a variable gain amplifier 1003, an averaging processor 1004, a reciprocal calculator 1005, multipliers 1006 and 1007, a reference value storage 1008, and a delay 1009. , The data retainer 1010 and the detector 1 already described in the fifth embodiment.
05, A / D converters 106 and 107, and decoder 110
, Amplitude information calculators 502 and 503, and reciprocal calculator 50
4, 505, multipliers 506, 507, reference value storage 508, data holders 509, 510, and multiplier 51.
1, 512.

[0215] The RF unit 1002 converts the signal received via the antenna 103 and the duplexer 104 into an IF signal or an RF signal.
The signal is converted into a signal and output to the variable gain amplifier 1003.

The variable gain amplifier 1003 amplifies the IF signal or the RF signal, and controls the gain so that the amplitude of the amplified signal becomes constant.

The averaging processor 1004 calculates the reception amplitude value m corresponding to the reception level by averaging the amplitude values Ki and Kq obtained by the amplitude information calculators 502 and 503, and calculates the reciprocal calculator 1005. Output to

The reciprocal calculator 1005 calculates the reciprocal 1 / m of the received amplitude value m and outputs the reciprocal 1 / m to the multiplier 1006.

The multiplier 1006 has a reference value storage 1008
Is multiplied by the reciprocal 1 / m and the convergence reference value for converging the reception level stored in the variable gain amplifier 100, and the gain correction value of the variable gain amplifier 1003, which is the result of the multiplication, is output to the multiplier 1007.

Multiplier 1007 multiplies a gain control value for controlling the gain of variable gain amplifier 1003 delayed by delay device 1009 by a gain correction value, and the result of the multiplication is as follows:
The gain control value of the variable gain amplifier 1003 newly obtained is output to the data holding unit 1010.

The data holding unit 1010 holds the gain control value in a certain reception section, and controls the gain of the variable gain amplifier 1806 based on the held gain control value.

In such a configuration, the antenna 103
Is received by the RF unit 10 via the duplexer 104.
02, where it is converted to an IF signal or an RF signal and amplified by the variable gain amplifier 1003.

The detector 105 performs quadrature detection of the amplified signal to obtain I and Qch signals.
The I and Qch signals are digitized by A / D converters 106 and 107. That is, it is converted into I and Qch data.

Here, the detector 105 or the A / D converter 1
Due to component variations and temperature characteristics of the components 06 and 107, a gain imbalance of I and Qch data may occur.
Gain unbalance leads to degradation of reception characteristics,
Need to be removed.

When the signal level of the received signal is very high, the detector 105 or the A / D converters 106 and 107
Saturates to deteriorate the characteristics or when the reception level of the received signal is very low, the A / D converter 10
Since the signal level is low with respect to the dynamic range of 6,107, the quantization noise increases and the characteristics may deteriorate, so that the level of the received signal is reduced by the A / D converter 1.
To fluctuate within the dynamic range of
It is necessary to perform gain control (AGC).

The correction of the gain imbalance is as described in the fourth embodiment.

On the other hand, in the reception AGC control, first, the averaging processor 1004 controls the amplitude information calculators 502 and 503.
Amplitude values Ki and Kq of I and Qch data calculated by
By calculating the average value, the reception amplitude value m corresponding to the reception level is obtained.

Next, a reciprocal calculator 1005 calculates the reciprocal 1 / m of the received amplitude value m, and a multiplier 1006 calculates the reciprocal 1 / m and the reference value stored in the reference value storage 1008. A gain correction value is obtained by performing the multiplication.

Next, the gain control value to be set for the variable gain amplifier 1003 is obtained by multiplying the gain correction value by the multiplier 1007 and the gain control value delayed by the delay unit 1009.

This gain control value is stored in data holder 1010
And supply it to the variable gain amplifier 1003,
The received signal after the variable gain amplifier 1003 is held at a certain fixed level.

Here, as shown in FIG. 11, the reception timing in the above description is a PHS (Personal Handyphone).
TDMA (Time Division Multiple Acces)
s) The method is assumed.

In this case, as shown in FIG. 11, the amplitude correction value and the gain control value calculated in the previous reception slot A are corrected in the next reception slot B. Further, since the amplitude correction value fluctuates in a sufficiently long time with respect to the received frame, the amplitude correction value calculated over a plurality of slots is not calculated for each slot, but the amplitude correction value calculated over a plurality of slots is used for a plurality of slots. It is also possible to use.

In the calculation of the amplitude correction value for correcting the gain imbalance or the calculation of the gain control value for performing the reception AGC process, a series of processes of the reciprocal calculation and the multiplication are replaced with division. Can be. Further, these calculations can be replaced by subtraction by performing logarithmic conversion on the calculated amplitude values Ki and Kq.

As described above, according to the transmitting and receiving apparatus of the ninth embodiment, the receiving apparatus (receiving section 1001) is replaced by the transmitting and receiving apparatus of the fourth embodiment.
Is added to the variable gain amplifier 1003 for amplifying the reception signal before detection, and the average value of the amplitude values Ki and Kq of the I and Qch data is calculated to obtain the reception amplitude value m corresponding to the reception level. Calculate the reciprocal 1 / m of the amplitude value m,
The reciprocal 1 / m is multiplied by a convergence reference value for converging the reception level to obtain a gain correction value of the variable gain amplifier,
This gain correction value is multiplied by the previous gain control value for controlling the gain of the variable gain amplifier delayed for a predetermined time to obtain the current gain control value, and the signal before detection is obtained using the gain control value. Since the gain of the variable gain amplifier to be amplified is controlled, the level of the received signal amplified by the variable gain amplifier can be kept constant by digital processing.

Further, since the gain unbalance can be corrected and the reception AGC processing can be performed by digital processing, there is no need to consider component variations and characteristic variations as compared with a configuration realized by an analog circuit, and there is no adjustment and low cost. , A receiving device can be realized.

Further, the circuit scale can be reduced as compared with a configuration realized by an analog circuit, and a receiving device can be realized at a lower cost.

Further, since the amplitude information calculators 502 and 503 can be used in common for both the gain imbalance correction processing and the reception AGC processing, a further reduction in the circuit scale can be realized, and further, the reciprocal operation and multiplication By performing the logarithmic conversion on the operation, the operation can be realized only by the subtraction, so that the circuit size can be further reduced.

(Embodiment 10) FIG.12 is a block diagram showing a configuration of a transmitting / receiving apparatus according to Embodiment 10 of the present invention. However, in the tenth embodiment shown in FIG. 12, portions corresponding to those in the fifth embodiment in FIG. 6 and the ninth embodiment in FIG.

A feature of the tenth embodiment is that an amplifying means for amplifying a received signal before detection is added to the configuration of the fifth embodiment, and the amplitude of the amplified signal output from the amplifying means is kept constant. Gain control of the amplifying means so that
I and Q output from amplitude information calculators 502 and 503
The point is that the amplitude of the detected I and Q channel signals is kept constant by performing digital processing using the amplitude values Ki and Kq of the ch data.

In transmitting / receiving apparatus 1200 according to the tenth embodiment shown in FIG. 12, transmitting section 102 has the same configuration as in the first embodiment, and a description thereof will not be repeated.

The receiving section 1201 includes the RF section 1002 already described in the ninth embodiment and the variable gain amplifier 1003
Averaging processor 1004, reciprocal calculator 1005,
Multipliers 1006 and 1007 and reference value storage 1008
A delay unit 1009, a data holding unit 1010, the detector 105 already described in the fifth embodiment, the A / D converters 106 and 107, the decoder 110, and the amplitude information calculators 502 and 503. , Reciprocal calculator 504 and multiplier 506
, A data holder 509, and a multiplier 511.

In such a configuration, Embodiment 5
The correction control for making the amplitude of the Ich data equal to that of the Qch data described in and the reception AGC control described in the ninth embodiment are performed.

As described above, according to the transmitting / receiving apparatus of the tenth embodiment, a receiving apparatus (receiving section 1201) is added to the configuration of the fifth embodiment by adding a variable gain amplifier 1003 for amplifying a received signal before detection. An average value of the amplitude values Ki and Kq of the I and Qch data is calculated to obtain a reception amplitude value m corresponding to the reception level, and a reciprocal 1 / m of the reception amplitude value m is calculated. A gain correction value of the variable gain amplifier is obtained by multiplying by a convergence reference value for converging the level, and this gain correction value and a previous gain control value for controlling the gain of the variable gain amplifier delayed for a predetermined time. To obtain the current gain control value, and the gain control value is used to control the gain of the variable gain amplifier that amplifies the signal before detection. Receiving It is possible to hold the level of No. constant.

As a result, since the reception gain can be corrected by digital processing, there is no need for correction due to component variations and characteristic variations, compared to a conventional method of correcting the gain using an analog circuit, and there is no need for adjustment and at low cost. A receiving device can be realized. Further, as compared with the receiving apparatus according to the ninth embodiment, since the imbalance correction is performed by comparing the gains of the I and Q signals, there is no need to compare with a reference value, so that the calculation amount and the circuit scale can be further reduced.

(Embodiment 11) FIG.13 is a block diagram showing a configuration of a transmitting / receiving apparatus according to Embodiment 11 of the present invention. However, in the eleventh embodiment shown in FIG. 13, parts corresponding to those in the tenth embodiment in FIG.

The eleventh embodiment differs from the tenth embodiment in that the Qch output from the amplitude information calculator 503 is different from that of the tenth embodiment.
Reciprocal 1 / Kq of data amplitude value Kq is calculated by reciprocal calculator 505
And the multiplier 1106 multiplies the reciprocal 1 / Kq by the convergence reference value stored in the reference value storage unit 1008.

In transmitting / receiving apparatus 1300 of the eleventh embodiment shown in FIG. 13, transmitting section 102 has the same configuration as in the first embodiment, and a description thereof will not be repeated.

The receiving section 1301 includes the RF section 1002 already described in the ninth embodiment and the variable gain amplifier 1003
, Multipliers 1006 and 1007 and reference value storage 100
8, the delay unit 1009, the data holding unit 1010, the detector 105 already described in the fourth or fifth embodiment, and A
/ D converters 106 and 107, decoder 110, amplitude information calculators 502 and 503, reciprocal calculators 504 and 505
, A multiplier 506, a data holder 509, and a multiplier 5
11 are provided.

In such a configuration, the reciprocal 1 / Kq is calculated by calculating the reciprocal of the amplitude value Kq by the reciprocal calculator 505.
And the reciprocal 1 / Kq and the convergence reference value are multiplied by a multiplier 10
By multiplying by 06, a gain correction value is obtained.

Here, the reason why the amplitude value Kq of the Qch signal is regarded as the reception level equivalent value is that the amplitude value Kq of the I and Qch data for a certain period calculated based on the above equation (1).
It is assumed that i and Kq have substantially the same value.

Further, in this example, the amplitude value K of the Qch signal
Although q is a value corresponding to the reception level, the amplitude value K of the Ich signal is
i may be a reception level equivalent value.

As described above, according to the transmission / reception apparatus of the eleventh embodiment, the circuit scale is further reduced as compared with the tenth embodiment by using the amplitude value Kq of the Qch signal as the reception level equivalent value in the reception AGC control. be able to. As for other effects, the same effects as in the tenth embodiment can be obtained.

(Embodiment 12) FIG.14 is a block diagram showing a configuration of a transmission / reception apparatus according to Embodiment 12 of the present invention. In the twelfth embodiment shown in FIG. 14, portions corresponding to those in the ninth embodiment shown in FIG. 10 are denoted by the same reference numerals.

The twelfth embodiment differs from the ninth embodiment in that the amplitude information calculators 502 and 503 are replaced with the maximum / minimum value calculators 702 and 703 described in the sixth embodiment.
And a maximum / minimum value subtractor 704, 705.

The maximum / minimum value calculators 702 and 703 are
I and Qc output from A / D converters 106 and 107
The maximum value and the minimum value in each predetermined section of the h data are calculated and output to the maximum value / minimum value subtractors 704 and 705.

The maximum / minimum value subtractors 704 and 705
By subtracting the minimum value from the maximum value, the amplitude values Ki and Kq of the I and Qch data are calculated. Subsequent operations are the same as those described in the ninth embodiment, and a description thereof will not be repeated.

As described above, according to the transmitting / receiving apparatus of the twelfth embodiment, the receiving apparatus (receiving section 1401) is provided with I and Qc
Since the amplitude values Ki and Kq of the h data are calculated from the maximum value and the minimum value, the same effect as that of the ninth embodiment can be obtained, and the amplitude information calculator 502 of the ninth embodiment. , 503, the amount of calculation and the circuit scale can be reduced.

(Embodiment 13) FIG.15 is a block diagram showing a configuration of a transmitting and receiving apparatus according to Embodiment 13 of the present invention. However, in the thirteenth embodiment shown in FIG. 15, portions corresponding to those in the tenth embodiment in FIG.

The thirteenth embodiment is different from the tenth embodiment in that the maximum / minimum value calculators 702 and 70 described in the sixth embodiment are replaced with the amplitude information calculators 502 and 503.
3 and maximum / minimum value subtractors 704 and 705.

The maximum / minimum value calculators 702 and 703 are
I and Qc output from A / D converters 106 and 107
The maximum value and the minimum value in each predetermined section of the h data are calculated, and the maximum / minimum value subtractors 704 and 705 subtract the minimum value from the maximum value to obtain I and Qch.
The respective amplitude values Ki and Kq of the data are calculated. Subsequent operations are the same as those described in the tenth embodiment, and a description thereof will not be repeated.

As described above, according to the transmission / reception apparatus of the thirteenth embodiment, the reception apparatus (reception section 1501) is provided with I and Qc
Since the configuration is such that the amplitude values Ki and Kq of the h data are calculated from the maximum value and the minimum value, the same effect as that of the tenth embodiment can be obtained, and the amplitude information calculator 502 of the tenth embodiment. , 503, the amount of calculation and the circuit scale can be reduced.

(Embodiment 14) FIG.16 is a block diagram showing a configuration of a transmitting / receiving apparatus according to Embodiment 14 of the present invention. However, in the fourteenth embodiment shown in FIG. 16, parts corresponding to the respective parts of the eleventh embodiment in FIG.

The fourteenth embodiment differs from the eleventh embodiment in that the amplitude information calculators 502 and 503 are replaced with the maximum / minimum value calculators 702 and 70 described in the sixth embodiment.
3 and maximum / minimum value subtractors 704 and 705.

The maximum / minimum value calculators 702 and 703 are
I and Qc output from A / D converters 106 and 107
The maximum value and the minimum value in each predetermined section of the h data are calculated, and the maximum / minimum value subtractors 704 and 705 subtract the minimum value from the maximum value to obtain I and Qch.
The respective amplitude values Ki and Kq of the data are calculated. Subsequent operations are the same as those described in the eleventh embodiment, and a description thereof will not be repeated.

As described above, according to the transmitting / receiving apparatus of the fourteenth embodiment, the receiving apparatus (receiving section 1601) is provided with I and Qc
Since the amplitude values Ki and Kq of the h data are calculated from the maximum value and the minimum value, the same effect as in the eleventh embodiment can be obtained, and the amplitude information calculator 502 according to the eleventh embodiment can be obtained. , 503, the amount of calculation and the circuit scale can be reduced.

(Embodiment 15) FIG.17 is a block diagram showing a configuration of a transmitting and receiving apparatus according to Embodiment 15 of the present invention. However, in the fifteenth embodiment shown in FIG. 17, portions corresponding to those in the eighth embodiment in FIG. 9 and the eleventh embodiment in FIG. 13 are denoted by the same reference numerals.

A feature of the fifteenth embodiment is that an amplifying means for amplifying a received signal before detection is added to the configuration of the eighth embodiment, and the amplitude of the amplified signal output from the amplifying means is kept constant. Gain control of the amplifying means so that
I and Q output from amplitude information calculators 502 and 503
The point is that the amplitude of the detected I and Q channel signals is kept constant by performing digital processing using the amplitude values Ki and Kq of the ch data.

In transmitting / receiving apparatus 1700 of the fifteenth embodiment shown in FIG. 17, transmitting section 102 has the same configuration as in the first embodiment, and a description thereof will not be repeated.

The receiving section 1701 includes the RF section 1002 already described in the eleventh embodiment and the variable gain amplifier 1003
, Reciprocal calculator 505 and multipliers 1006 and 1007
, A reference value storage unit 1008, a delay unit 1009, a data holding unit 1010, the detector 105 already described in the eighth embodiment, A / D converters 106 and 107, a decoder 110, and a reciprocal. Calculator 504, multiplier 506, data holder 509, multiplier 511, maximum / minimum value calculators 702, 703, maximum / minimum value subtractor 704,
705, average value calculators 304 and 305, and subtractor 11
3, 114, reference value storage units 115 and 116, and subtracters 108 and 109.

The maximum / minimum value calculators 702 and 703 are
I and Qc output from A / D converters 106 and 107
The maximum value and the minimum value in each predetermined section of the h data are calculated, and the maximum / minimum value subtractors 704 and 705 subtract the minimum value from the maximum value to obtain I and Qch.
The respective amplitude values Ki and Kq of the data are calculated. Subsequent operations are the same as those described in the eighth and eleventh embodiments, and a description thereof will not be repeated.

As described above, according to the transmitting / receiving apparatus of the fifteenth embodiment, the receiving apparatus (receiving section 1701) has the same amplitude values of the I and Qch data of the eighth embodiment,
The function of deleting the DC offset component of the I and Qch data has the amplitude value K of the Qch signal described in the eleventh embodiment.
Since the apparatus is configured with a function of using q as a reception level equivalent value for reception AGC control, it is possible to obtain the effect of combining both the eighth and eleventh embodiments.

[0272]

As described above, according to the present invention,
Without using a correction circuit and expensive parts with little change in characteristics, it is possible to eliminate variations in parts and characteristics and gain unbalance of I and Qch signals after detection at low cost, and to reduce the circuit scale. it can.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a transmission / reception apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a format diagram of a received frame according to the first embodiment.

FIG. 3 is a block diagram showing a configuration of a transmission / reception apparatus according to Embodiment 2 of the present invention.

FIG. 4 is a block diagram showing a configuration of a transmitting / receiving apparatus according to Embodiment 3 of the present invention.

FIG. 5 is a block diagram showing a configuration of a transmission / reception apparatus according to Embodiment 4 of the present invention.

FIG. 6 is a block diagram showing a configuration of a transmitting / receiving apparatus according to Embodiment 5 of the present invention.

FIG. 7 is a block diagram showing a configuration of a transmission / reception apparatus according to Embodiment 6 of the present invention.

FIG. 8 is a block diagram showing a configuration of a transmitting / receiving apparatus according to Embodiment 7 of the present invention.

FIG. 9 is a block diagram showing a configuration of a transmission / reception apparatus according to Embodiment 8 of the present invention.

FIG. 10 is a block diagram showing a configuration of a transmitting / receiving apparatus according to Embodiment 9 of the present invention.

FIG. 11 is a format diagram of a reception frame in the ninth embodiment.

FIG. 12 is a block diagram showing a configuration of a transmitting / receiving apparatus according to Embodiment 10 of the present invention.

FIG. 13 is a block diagram showing a configuration of a transmission / reception apparatus according to Embodiment 11 of the present invention.

FIG. 14 is a block diagram showing a configuration of a transmission / reception apparatus according to Embodiment 12 of the present invention.

FIG. 15 is a block diagram showing a configuration of a transmitting / receiving apparatus according to Embodiment 13 of the present invention.

FIG. 16 is a block diagram showing a configuration of a transmission / reception apparatus according to Embodiment 14 of the present invention.

FIG. 17 is a block diagram showing a configuration of a transmission / reception apparatus according to Embodiment 15 of the present invention.

FIG. 18 is a block diagram showing a configuration of a conventional receiving apparatus.

FIG. 19 is a block diagram showing a configuration of a conventional transmitting / receiving apparatus.

[Description of Code] 105 Detector 106, 107 A / D Converter 108, 109 Subtractor 110 Decoder 111, 112 Average Value Calculator 113, 114 Subtractor 115, 116 Reference Value Storage 117, 118 Adder 119, Reference Signs List 120 delay device 121 mapping device 122, 123 D / A converter 124 modulator 302, 303 maximum / minimum value calculator 304, 305 average value calculator 402, 403 data holder 502, 503 amplitude information calculator 504, 505 Reciprocal calculator 506,507 Multiplier 508 Reference value storage 509,510 Data retainer 511,512 Multiplier 702,703 Maximum / minimum value calculator 704,705 Maximum / minimum value subtractor 1003 Variable gain amplifier 1004 Average Conversion processor 1005 reciprocal calculator 1006,1007 multiplier 10 8 reference value storage unit 1009 delay unit 1010 data retainer

Claims (40)

[Claims] 1. A received signal is converted into a digital signal, a reference value of the average value is subtracted from an average value of the digital signal for a predetermined time, a DC offset value is obtained, and the DC offset value is obtained at the previous reception timing. The DC offset correction value of the present reception timing is obtained by adding the DC offset correction value of the received digital signal, and a value obtained by delaying the DC offset correction value by a predetermined time is subtracted from the digital signal of the current reception timing to obtain a DC offset component. A receiver for removing the digital signal from which the DC offset component has been removed. 2. A detector for orthogonally detecting a received signal, and an A / D converter for converting the orthogonally detected signal into a first digital signal.
Conversion means, first subtraction means for subtracting a first DC offset correction value for removing a DC offset component from the first digital signal to obtain a second digital signal,
An average value calculating means for calculating an average value from a result of adding the second digital signal for a certain period of time; and a second means for subtracting a reference value of the average value from the average value to obtain a DC offset value.
Subtraction means, addition means for adding the DC offset value to the first DC offset correction value to obtain a second DC offset correction value, and delay means for delaying the second DC offset correction value to obtain the first DC offset correction value And a decoding means for decoding the second digital signal. 3. The receiving apparatus according to claim 2, wherein the delay means obtains the first DC offset correction value by delaying the second DC offset correction value by one or more reception slots. 4. A function for calculating an average value from a maximum value and a minimum value of the second digital signal instead of a function of calculating an average value from a result of adding the second digital signal for a predetermined time. The receiving device according to claim 2 or 3, wherein the receiving device is provided. 5. A detection means for performing quadrature detection on a received signal, an A / D conversion means for converting the quadrature detection signal into a digital signal, and an average value calculation for calculating an average value from a maximum value and a minimum value of the digital signal Means for subtracting a reference value of the average value from the average value to obtain a DC offset value;
Subtracting means, second subtracting means for subtracting the DC offset value from the digital signal to remove the DC offset component, and decoding means for decoding the digital signal from which the DC offset component has been removed. Characteristic receiving device. 6. A data holding means for outputting a DC offset value output from the first subtraction means to the second subtraction means while holding the DC offset value for a time corresponding to one or a plurality of reception slots. Item 6. The receiving device according to Item 5. 7. A detection means for performing quadrature detection on a received signal, A / D conversion means for converting the I and Q ch signals, which are the quadrature detection signals, into digital I and Q ch data, and an amplitude value of the I and Q ch data. , A first reciprocal calculating means for calculating the reciprocal of the amplitude value of the I and Qch data, and an amplitude correction value by multiplying the reciprocal of the I and Qch data by the same reference value. A first multiplying means, and a second multiplying means for multiplying the amplitude correction values of the I and Qch data by the I and Qch data to correct the amplitude of the Ich data to be equal to the amplitude of the Qch data; Decoding means for decoding the I and Qch data having the amplitude. 8. A detection means for performing quadrature detection on a received signal, A / D conversion means for converting the I and Qch signals, which are the quadrature detection signals, into digital I and Qch data, and an amplitude value of the I and Qch data. Information calculating means for calculating the reciprocal of the amplitude value of the Ich data.
Reciprocal calculating means, reciprocal of the Ich data and Qch
First multiplying means for multiplying the amplitude value of the data to obtain an amplitude correction value, and a second multiplication means for multiplying the amplitude correction value by the Ich data to correct the amplitude of the Ich data to be the same as the amplitude of the Qch data. A receiving apparatus comprising: squaring means; and decoding means for decoding the I and Qch data having the same amplitude. 9. I and Qc output from the first multiplying means
a first multiplication means for outputting the amplitude correction value of the h data to the second multiplication means while holding the time corresponding to one or a plurality of reception slots;
9. The receiving device according to claim 8, further comprising a data holding unit. 10. The second signal from which a DC offset component has been removed.
Amplitude information calculating means for calculating the amplitude values of the first I and Qch data as digital signals; reciprocal calculating means for calculating the reciprocal of the amplitude value of the first Ich data; multiplying the reciprocal by the amplitude value of the Qch data A third multiplying means for obtaining an amplitude correction value by multiplying the amplitude correction value by the first Ich data and a fourth multiplying means for correcting the amplitude of the first Ich data to be equal to the amplitude of the first Qch data. 3. The receiving apparatus according to claim 2, further comprising: decoding means for decoding the first I and Qch data having the same amplitude. 11. An amplitude calculating means for subtracting a minimum value from a maximum value of I and Qch data, which is a digital signal from which a DC offset component has been removed, to calculate an amplitude value of said I and Qch data, Reciprocal calculating means for calculating the reciprocal of the amplitude value; first multiplying means for multiplying the reciprocal by the amplitude value of the Qch data to obtain an amplitude correction value; and removing the amplitude correction value and the DC offset component. Second multiplying means for multiplying the Ich data by the Ich data and correcting the amplitude of the Ich data to be the same as the amplitude of the Qch data from which the DC offset component has been removed, and wherein the decoding means has the same amplitude as the Ich data. 6. The receiving device according to claim 5, wherein the receiving device decodes the Qch data. 12. Amplifying means for amplifying a received signal before quadrature detection, and an average value of amplitude values of I and Qch data calculated by the amplitude information calculating means to calculate a received amplitude value corresponding to a level of the received signal. Averaging processing means for calculating a reciprocal of the received amplitude value, a second reciprocal calculating means for calculating a reciprocal of the received amplitude value, and a gain correction of the amplifying means by multiplying the reciprocal by a convergence reference value for converging the level of the received signal. A third multiplying means for obtaining a value, and a gain control value for controlling the gain of the amplifying means delayed for a predetermined time so that the level of the amplified reception signal is constant, and the gain correction value, and The receiving apparatus according to claim 7, further comprising: a fourth multiplying unit that obtains a gain control value and outputs the gain control value to the amplifying unit. 13. An amplifying means for amplifying a received signal before quadrature detection, a reciprocal calculating means for calculating a reciprocal of the amplitude value of the I or Qch data calculated by the amplitude information calculating means, and a reciprocal and a convergence reference value. And a fourth multiplying means for multiplying the gain correction value by a predetermined time and the gain correction value to obtain a current gain control value and outputting the current gain control value to the amplification means. The receiving device according to claim 8 or 11, comprising: 14. The amplitude information calculating means is configured to calculate a maximum value and a minimum value of I and Qch data, and to subtract the minimum value from the maximum value to calculate an amplitude value of the I and Qch data. The receiving device according to any one of claims 7, 8, and 12, wherein: 15. A data processing apparatus comprising: a second data holding means for outputting the gain control value output from the fourth multiplication means to the amplification means while holding the gain control value for a time corresponding to one or a plurality of reception slots. The receiving device according to any one of claims 12 to 14. 16. A transmission / reception device comprising the reception device according to claim 1. Description: 17. Mapping means for mapping transmission data to encoded data for transmission, D / A conversion means for converting the mapped encoded data to an analog signal, and a modulation signal for modulating the analog signal. 17. The transmission / reception apparatus according to claim 16, further comprising: a transmission apparatus including: a modulation unit configured to convert the data into a signal. 18. A base station apparatus comprising: the receiving apparatus according to claim 1. Description: 19. A mobile station device comprising the receiving device according to claim 1. Description: 20. A mobile communication system comprising the receiving device according to claim 1 in a base station device or a mobile station device. 21. A base station apparatus comprising the transmission / reception apparatus according to claim 16. 22. A mobile station device comprising the transmission / reception device according to claim 16. 23. A mobile communication system comprising the transmitting / receiving apparatus according to claim 16 in a base station apparatus or a mobile station apparatus. 24. Converting a received signal into a digital signal,
The DC offset value is obtained by subtracting the reference value of the average value from the average value of the digital signal for a certain period of time, and this DC offset value is added to the DC offset correction value of the digital signal obtained at the previous reception timing, and this time. The DC offset correction value of the reception timing is obtained, a value obtained by delaying the DC offset correction value by a predetermined time is subtracted from the digital signal of the current reception timing to remove the DC offset component, and the digital signal from which the DC offset component has been removed is obtained. A receiving method characterized by decoding. 25. A received signal is converted to a first digital signal, and a first DC offset correction value for removing a DC offset component is subtracted from the first digital signal to obtain a second digital signal. An average value is calculated from the result of adding the digital signals for a certain period of time, a reference value of the average value is subtracted from the average value to obtain a DC offset value, and this DC offset value is added to the first DC offset correction value. Calculating a second DC offset correction value, delaying the second DC offset correction value to obtain the first DC offset correction value, and decoding a second digital signal from which a DC offset component has been removed by the first DC offset correction value. Characteristic receiving method. 26. The receiving method according to claim 25, wherein the first DC offset correction value is obtained by delaying the second DC offset correction value by one or more reception slots. 27. An apparatus according to claim 25, wherein an average value is calculated from a maximum value and a minimum value of said second digital signal instead of calculating an average value from a result of adding said second digital signal for a predetermined time. Or the receiving method according to claim 26. 28. Converting a received signal into a digital signal,
An average value is calculated from the maximum value and the minimum value of the digital signal, and a reference value of the average value is subtracted from the average value to obtain a DC value.
Obtain an offset value, and calculate the DC value from the digital signal.
Subtract the offset value to remove the DC offset component,
A receiving method comprising decoding the digital signal from which the DC offset component has been removed. 29. The method according to claim 28, wherein the DC offset value is held for a time corresponding to one or more reception slots, and the held DC offset value is subtracted from the digital signal to remove the DC offset component. The receiving method described. 30. Reception signals are converted to digital I and Q channels.
The data are converted into data, the amplitude values of the I and Qch data are calculated, the reciprocals of the I and Qch data are calculated, and the reciprocals of the I and Qch data are multiplied by the same reference value to obtain an amplitude correction value. Is calculated by multiplying the amplitude correction values of the I and Qch data by the I and Qch data.
A reception method comprising: correcting the amplitude of ch data to be equal to the amplitude of the Qch data; and decoding the I and Qch data having the same amplitude. 31. Reception signals are converted to digital I and Q channels.
The data is converted into data, the amplitude values of the I and Qch data are calculated, the reciprocal of the Ich data is calculated, and the reciprocal of the Ich data is multiplied by the amplitude value of the Qch data to obtain an amplitude correction value. And the amplitude correction value and the Ich
Multiplying the amplitude of the Ich data by the Qc
A receiving method, wherein the amplitude is corrected to be the same as that of the h data, and the I and Qch data having the same amplitude are decoded. 32. An amplitude correction value of I and Qch data is set to 1
Or the time corresponding to a plurality of reception slots is held, and the amplitude of the Ich data is used as the Qc with the amplitude correction value being held.
32. The receiving method according to claim 30, wherein the amplitude is corrected to be equal to the amplitude of the h data. 33. A second filter from which a DC offset component has been removed.
The amplitude values of the first I and Qch data, which are digital signals, are calculated, the reciprocal of the amplitude value of the first Ich data is calculated, and the reciprocal is multiplied by the amplitude value of the Qch data to obtain an amplitude correction value. Multiplying an amplitude correction value by the first Ich data to correct the amplitude of the first Ich data to be equal to the amplitude of the first Qch data, and decoding the first I and Qch data having the same amplitude. 26. The receiving method according to claim 25, wherein: 34. An amplitude value of the I and Qch data is calculated by subtracting a minimum value from a maximum value of the I and Qch data which is a digital signal from which a DC offset component has been removed, and the reciprocal of the amplitude value of the Ich data Is calculated by multiplying the reciprocal and the amplitude value of the Qch data to obtain an amplitude correction value. The amplitude correction value is multiplied by the Ich data from which the DC offset component has been removed to obtain the amplitude of the Ich data. 29 is corrected to be the same as the amplitude of the Qch data from which the DC offset component has been removed, and the I and Qch data having the same amplitude are decoded.
The receiving method described. 35. A receiving signal before quadrature detection is amplified, an average value of amplitude values of I and Qch data is calculated, a receiving amplitude value corresponding to a level of the receiving signal is obtained, and a reciprocal of the receiving amplitude value is obtained. And a convergence reference value for converging the level of the received signal to obtain a gain correction value at the time of the amplification, and the gain at the time of the amplification delayed for a predetermined time so that the level of the amplified received signal is constant. The gain control value for controlling is multiplied by the gain correction value to obtain a current gain control value, and the gain at the time of amplification is controlled by the obtained gain control value. The receiving method according to claim 31. 36. A received signal before quadrature detection is amplified, a reciprocal of an amplitude value of I or Qch data is multiplied by a convergence reference value to obtain a gain correction value, and a gain control value delayed by a predetermined time is calculated. 34. The gain control method according to claim 31, wherein the gain control value is multiplied to obtain a current gain control value, and the gain at the time of amplification is controlled by the obtained gain control value.
4. The receiving method according to item 4. 37. When calculating amplitude values of I and Qch data, a maximum value and a minimum value of the I and Qch data are obtained, and a minimum value is subtracted from the maximum value to obtain the I and Qch data.
36. The receiving method according to claim 30, wherein an amplitude value of the ch data is calculated. 38. The gain control value is held for a time corresponding to one or more reception slots, and the gain at the time of amplification is controlled by the held gain control value.
The receiving method according to any one of claims 37 to 37. 39. A transmission / reception method using the reception method according to claim 24. 40. A transmission method in which transmission data is mapped to encoded data for transmission, the mapped encoded data is converted into an analog signal, and the analog signal is modulated and converted into a modulated signal. 40. The transmission / reception method according to claim 39, wherein: