JP2008252850A - Receiver and receiving processing program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a receiver and a receiving processing program in which receiving performance can be improved by dealing with every radio status by enabling an algorithm or parameters to be modified in accordance with the status when switching and outputting received signals while concurrently performing a plurality of adaptive operations. <P>SOLUTION: When a first receiving unit 2a and a second receiving unit 2b are tuned onto the channel identical to each other, a first adaptive antenna processing unit 4a and a second adaptive antenna processing unit 4b perform adaptive operations while using the adaptive algorithm identical to each other and setting step sizes to values different from each other. When the first receiving unit 2a and the second receiving channel 2b are tuned onto channels different from each other, on the other hand, the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b perform adaptive operations using adaptive algorithms different from each other. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present application relates to a technology of a receiving apparatus and a receiving processing program for removing the influence of an interference wave caused by multipath fading from a received transmission wave by variably controlling the directivity of a plurality of antenna elements that receive the transmission wave. Related to the field.

  Conventionally, an adaptive antenna that can independently control the amplitude and phase of excitation of each antenna element of an array antenna in which a plurality of antenna elements are arranged at intervals, and that can adaptively control the directivity of the array antenna has been provided. Are known.

  According to the receiving apparatus using such an adaptive antenna, even if radio wave interference occurs in the same channel due to multipath fading, it is possible to extract the desired wave to be received by removing the interference wave. It can be realized.

  As algorithms used for controlling such adaptive antennas, for example, MMSE (Minimum Mean Square Error) algorithm and CMA (Constant Modulus Algorithm) are known. According to these algorithms, as in mobile communication, Even when the arrival direction of the desired wave changes with the passage of time, the directivity of the adaptive antenna can be tracked. In particular, CMA is excellent in that it does not require prior knowledge about the desired wave.

  By the way, for example, when communication is performed while moving on land by a vehicle or the like, the reception environment is deteriorated due to the fact that there are cases where buildings are standing in the vicinity or the vehicle must move through a tunnel. Moreover, since the reception environment changes from moment to moment due to movement, further improvement is desired so that good mobile communication can be performed even in such a situation.

  In view of such circumstances, for example, using information on the terrain composed of the current position of the moving body and the mountains and buildings around the moving body, the direction in which the broadcast radio wave can be satisfactorily received is calculated, and the directivity of the antenna is determined. The invention to change is proposed (patent document 1). According to the present invention, for example, even in a tunnel or the like, even if the direction in which the broadcast tower is present is not necessarily good in receiving broadcast radio waves, the broadcast radio waves are considered to be good terrain. It is said that reception performance can be improved by directing the antenna directivity in the direction.

Also, based on the diversity criteria, a diversity processing circuit that selects and outputs one output signal from the output signals from each antenna element, and a CMA corrects and combines the output signals from each antenna element. There has been proposed an invention in which an output CMA processing circuit is provided and either one of the signals is output based on the quality of the signal output from each processing circuit (Patent Document 2). According to the present invention, it is said that the problem of both types of distortion can be effectively solved in a situation where multipath fading occurs.
JP 2005-295365 A JP-A-10-209890

  However, the influence of multipath fading is very strong, for example, when a broadcast such as FM (Frequency Modulation) radio is retransmitted in a tunnel or the like by a leaky coaxial cable or the like, and the radio wave state changes drastically. Under the environment, there is a problem that the invention described in Japanese Patent Application Laid-Open No. H10-228707 cannot be fully accommodated.

  For example, since the directivity of the antenna can be formed with only one pattern at the same time, if the directivity is controlled in the wrong direction, this cannot be compensated.

  In addition, for example, the optimum value of parameters such as the convergence speed of the square error and the step size that determines the stability after convergence varies depending on the radio wave condition, the moving speed of the vehicle, etc., and should be determined uniquely. However, in the invention described in Patent Document 1, since the adaptive operation can be performed with only one parameter at the same time, it cannot be said that the adaptive operation is always performed with the optimum parameter.

  In addition, algorithms for controlling adaptive antennas and removing the influence of interference waves have their merits and demerits, and it is difficult to say that one algorithm can sufficiently cope with all situations. For example, although CMA is suitable for mobile communication, it is not suitable for improving the SN ratio.

  In such a point, although the invention described in Patent Document 2 uses CMA and diversity in combination, it cannot be said that it can cope with all radio wave conditions.

  The present application has been made in view of the above points, and an example of the problem is that the algorithm and parameters can be changed according to the situation when the received signal is switched and output while simultaneously performing a plurality of adaptive operations. Accordingly, an object of the present invention is to provide a receiving apparatus and a receiving processing program that can cope with any radio wave condition and improve receiving performance.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a reception device that variably controls the directivity of a plurality of antenna elements and outputs a reception signal, and a plurality of reception signal generations for generating the reception signals, respectively. And a signal selecting means for selecting one of the plurality of received signals based on the signal quality of each of the plurality of received signals generated by the plurality of received signal generating means, and the selected Each receiving signal generating means is a tuning means for outputting a tuning signal tuned to a channel to be received by each antenna signal output from each antenna element. And tuning means capable of setting a channel different from the tuning means included in the other received signal generating means, and controlling the amplitude and phase of each of the outputted tuning signals. Interference wave effect removing means for removing the influence of the interference wave received by each antenna element from the received signal by generating the received signal based on a tuning signal, and the plurality of received signal generating means The interference wave effect removing means included in the above-described case uses the same algorithm when tuning to the same channel between the reception signal generating means, and the weighting coefficient used for controlling the amplitude and phase. When the parameter for determining the amount of fluctuation is set to a value different from each other to remove the influence of the interference wave and tuned to different channels between the reception signal generating means, the different algorithms are used to It is characterized by removing the influence of interference waves.

  According to a twelfth aspect of the present invention, a computer included in a receiving device that variably controls the directivity of a plurality of antenna elements and outputs a received signal, a plurality of received signal generating means for generating each of the received signals, the plurality of received signals Based on the signal quality of each of the plurality of reception signals generated by the reception signal generation means, signal selection means for selecting one of the plurality of reception signals, and outputting the selected reception signal A tuning means for functioning as a signal output means, and outputting a tuning signal tuned to a channel to be received by each of the antenna signals output from each of the antenna elements, with the computer as each of the received signal generating means, Tuning means capable of setting a channel different from the tuning means included in the other received signal generating means, and the amplitude and phase of each output tuning signal. Generating the reception signal based on the respective tuning signals while controlling the interference signal to remove the influence of the interference wave received by each antenna element from the reception signal, The interference wave effect removing means included in the received signal generating means uses the same algorithm and controls the amplitude and phase when the received signal generating means are tuned to the same channel. When the parameters for determining the fluctuation amount of the weighting coefficient used in the above are set to different values to eliminate the influence of the interference wave and tuned to different channels between the received signal generating means, the parameters are different from each other. An effect of the interference wave is removed using an algorithm.

  Hereinafter, the best embodiment of the present application will be described in detail with reference to the drawings. In addition, embodiment described below is embodiment at the time of applying this application with respect to the FM tuner which can receive FM (Frequency Modulation) broadcast.

[1. First Embodiment]
[1.1 FM tuner configuration]
First, the configuration of the FM tuner 100 according to the first embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a block diagram illustrating an example of a schematic configuration of an FM tuner 100 according to the first embodiment. FIG. 2 is a block diagram illustrating an example of a schematic configuration of the first adaptive antenna processing unit 4a according to the first embodiment. FIG. 3 is a block diagram showing an example of a schematic configuration of the first demodulator 5a according to the first embodiment.

  The FM tuner 100 receives the FM broadcast, and removes the influence of the interference wave from the FM demodulated signal by adaptively controlling the antenna directivity by the two received signal processing units, respectively. Of the generated audio signals demodulated in each, switching is appropriately performed so that the audio signal having the better signal quality is output to the outside.

  As shown in FIG. 1, the FM tuner 100 includes antennas AT1 to AT3, a first reception signal processing unit 1a, a second reception signal processing unit 1b, a switch 6, a determination unit 7, an operation unit 8, And a control unit 9.

  At this time, the antennas AT1 to AT3 respectively constitute an example of an antenna element according to the present application, and the first reception signal processing unit 1a and the second signal processing unit 1b each constitute an example of a reception signal generating unit according to the present application. The switch 6 constitutes an example of a signal output unit according to the present application, and the operation unit 8 constitutes an example of an input unit according to the present application.

  In the above configuration, the antennas AT1 to AT3 are reception array antennas capable of adaptively controlling directivity, and RF (Radio Frequency) signals Sr1, Sr2, and Sr3 (output from the antennas AT1 to AT3 ( An example of the antenna signal is supplied to both the first receiver 2a and the second receiver 2b.

  Here, the FM tuner 100 is assumed to be used mainly on the ground, such as being mounted on an automobile. When such use on the ground is performed, it is effective to remove interference waves from at least two directions due to multipath fading. Therefore, if the number of interference waves is one less than the number of antenna elements, all of the interference waves can be effectively removed. In this embodiment, an array antenna is configured by three antenna elements. Yes. However, the number of antenna elements may be four or more or two.

  The first received signal processing unit 1a includes a first receiving unit 2a, a first signal converting unit 3a, a first adaptive antenna processing unit 4a, and a first demodulating unit 5a, and a second received signal processing unit 1b. Is composed of a second receiver 2b, a second signal converter 3b, a second adaptive antenna processor 4b, and a second demodulator 5b.

  At this time, the first receiving unit 2a and the second receiving unit 2b constitute an example of the tuning unit and the amplifying unit according to the present application, respectively, and the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b are respectively used in the present application. The first demodulator 5a and the second demodulator 5b constitute an example of a demodulator according to the present application.

  In addition, since the 1st received signal processing part 1a and the 2nd received signal processing part 1b are the same structures, below, the 1st received signal processing part 1a is mainly demonstrated below and the 2nd received signal processing part 1b is demonstrated. Detailed description is omitted.

  The first receiving unit 2a includes RF / IF processing units 21 to 23. The RF signal Sr1 output from the antenna AT1 is supplied to the RF / IF processing unit 21, and the RF signal Sr2 output from the antenna AT2 is RF. The RF signal Sr3 output from the antenna AT3 to the / IF processing unit 22 is input to the RF / IF processing unit 23, respectively. Each of the RF / IF processing units 21 to 23 includes a tuning unit, a variable amplifier, an AGC (Automatic Gain Control), a frequency conversion unit, and the like, and is designated by the control unit 9 among the input RF signals. It tunes to the RF signal of the channel (any frequency band from 76MHz to 87.5MHz), and performs band limitation, amplification, frequency conversion, etc. on this RF signal to generate an IF (Intermediate Frequency) signal (an example of a tuning signal) The IF signal is generated and output to the signal converter 3a.

  The first signal conversion unit 3a includes A / D (Analog / Digital) conversion units 311 to 313, digital mixers 321 to 323, and filter units 331 to 333.

  The A / D converter 311 receives the IF signal Si1 output from the RF / IF processor 21, and the A / D converter 312 receives the IF signal Si2 output from the RF / IF processor 22. The IF signal Si3 output from the RF / IF processing unit 23 is input to the unit 313, and the A / D conversion units 311 to 313 convert the IF signals into digital signals, respectively. The digital IF signal is output to the digital mixers 321 to 323.

  The digital mixer 321 receives the digital IF signal Sd1 output from the A / D converter 311, the digital mixer 322 receives the digital IF signal Sd2 output from the A / D converter 312, and the digital mixer 323 receives the A / D signal. The digital IF signal Sd3 output from the conversion unit 313 is input, and the digital mixers 321 to 323 have the digital IF signal that has an in-phase component and a phase of π / 2. The in-phase component and the quadrature component are output to the filter units 331 to 333.

The filter unit 331 receives the in-phase component xi ₁ and the quadrature component xq ₁ output from the digital mixer 321, and the filter unit 332 receives the in-phase component xi ₂ and the quadrature component xq ₂ output from the digital mixer 322. In-phase component xi ₃ and quadrature component xq ₃ output from digital mixer 323 are input, respectively. The filter units 331 to 333 are digital filters, remove unnecessary high-frequency components of the input in-phase component and quadrature component, respectively, and output the in-phase component and quadrature component to the first adaptive antenna processing unit 4a. It is like that.

  Note that the configuration of the signal conversion unit is not limited to that described above. For example, Hilbert transform or offset sampling may be performed, or the IF signal is converted into its in-phase component and quadrature component by a phase converter. May be converted into a digital signal.

  In the following description, the in-phase component xi and the quadrature component xq will be described as one output signal x for convenience. x can be expressed as x = xi + j × xq using a complex expression.

First adaptive antenna processing section 4a has been controlled (actually the output signals x _1, x _2, x _3, respectively of the amplitude and phase output from the filter unit 331 to 333, controls the amplitude of the in-phase component orthogonal component respectively The output signals are synthesized to generate a synthesized signal y ₁ (an example of a received signal), thereby removing the influence of interference waves received by the antennas AT1 to AT3 from the synthesized signal y _1. It has become.

  Here, the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b are used when the reception signal processing unit 1a and the reception signal processing unit 1b perform reception operations on the same channel, that is, the reception unit. When the 2a and the receiving unit 2b are tuned to the same channel, they operate using the same algorithm CMA and different step sizes α (details will be described later) while receiving When the signal processing unit 1a and the reception signal processing unit 1b perform reception operations on different channels, use the CMA of different algorithms and set the same step size α to operate. It has become.

  Specifically, based on the control signal output from the control unit 9 (including information on tuning to the same channel or tuning to a different channel), the first adaptive antenna processing unit 4a and the first 2 The adaptive antenna processing unit 4b is configured to set an algorithm and a step size α.

  As shown in FIG. 2, the first adaptive antenna processing unit 4 a includes multipliers 41 to 43, an adding unit 44, and a weight control unit 45.

The multiplier 41 multiplies the output signal x ₁ output from the filter unit 331 by the weight value h ₁ (an example of a weighting coefficient) output from the weight control unit 45, and outputs the result to the addition unit 44. It has become. Similarly, the multiplier 42 multiplies the output signal x ₂ by the weight value h ₂ , and the multiplier 43 multiplies the output signal x ₃ by the weight value h ₃ , and the result is sent to the adder 44. It is designed to output.

To the adder 44, the multiplier 41 to 43 are adapted to each output signal is input which is output from the combined signal y ₁ by adding the output signal first demodulator 5a and the weight control unit 45 To output.

  That is, the first adaptive antenna processing unit 4a performs the calculation shown in the following formula (1) by the multipliers 41 to 43 and the addition unit 44.

ここで、ｙ_１（ｋ）は、時系列上におけるｋ番目の合成信号ｙ_１のサンプル値である。また、ｘ_１（ｋ）、ｘ_２（ｋ）、ｘ_３（ｋ）、ｈ_１（ｋ）、ｈ_２（ｋ）、ｈ_３（ｋ）は、夫々ｋ番目のｘ_１、ｘ_２、ｘ_３、ｈ_１、ｈ_２、ｈ_３のサンプル値である。また、上添字Ｔは、転置を表している。

Here, y ₁ (k) is a sample value of the k-th synthesized signal y ₁ on the time series. Also, x ₁ (k), x ₂ (k), x ₃ (k), h ₁ (k), h ₂ (k), and h ₃ (k) are the k-th x ₁ , x ₂ , x, respectively. ₃ , h ₁ , h ₂ , h ₃ sample values. The superscript T represents transposition.

The weight control unit 45 is configured to receive the output signals x ₁ , x ₂ , x ₃ output from the filter units 331 to 333 and the synthesized signal y ₁ output from the addition unit 44, and the control unit 9 The step size (an example of a parameter) is set based on the control of the above, and the weight values h ₁ , h ₂ , and h ₃ are updated, and the weight values are output to the multipliers 41 to 43.

Specifically, the weight control unit 45 uses the weight value h so that the distortion of the envelope is minimized based on the operating principle of CMA using the property that the envelope of the signal is constant in frequency modulation and phase modulation. ₁ , h ₂ and h ₃ are calculated.

Here, the weight control unit 45 calculates the weight values h ₁ , h ₂ , and h ₃ using the set CMA of two CMAs of different algorithms. First, the first CMA Will be described. The CMA described below is referred to as “basic CMA”.

In the basic CMA, the weight control unit 45 calculates an error signal ε (k) that is an error of the composite signal y ₁ (k) from a constant envelope value (1 in the present embodiment) by the following equation (2 ).

実際には、合成信号ｙ_１は、その同相成分ｙｉ_１と直交成分ｙｑ_１として出力されるため、｜ｙ_１（ｋ）｜^２＝（ｙｉ_１（ｋ））^２＋（ｙｑ_１（ｋ））^２として計算する。

Actually, since the synthesized signal y ₁ is output as its in-phase component yi ₁ and quadrature component yq ₁ , | y ₁ (k) | ² = (yi ₁ (k)) ² + (yq ₁ (k) ) Calculate as ² .

  Here, the update formula of the weight value h is

と表すことができる。ここで、上添字＊は複素共役を表している。また、αはステップサイズであり、ウエイト値ｈの変動量を決定するパラメータである。このステップサイズαに大きい値を設定すると、２乗誤差（｜ε（ｋ）｜^２）の収束は速くなるが、収束後の安定性は悪くなる。一方、ステップサイズαに小さい値を設定すると、収束は遅くなるが、収束後の安定性は良くなる。

It can be expressed as. Here, the superscript * represents a complex conjugate. Further, α is a step size, which is a parameter for determining the variation amount of the weight value h. When a large value is set for this step size α, the convergence of the square error (| ε (k) | ² ) becomes faster, but the stability after convergence becomes worse. On the other hand, when the step size α is set to a small value, convergence is delayed, but stability after convergence is improved.

  In actuality, since updating is performed for each weight value, the weight control unit 45 updates each weight value by calculating the following equations (3) to (5).

以上のように、ウエイト制御部４５は、前回算出した各ウエイト値を保持しておき、出力信号ｘ_１、ｘ_２、ｘ_３、合成信号ｙ_１及びステップサイズαを用いて、上記式（２）、（４）〜（６）により各ウエイト値を更新するのである。

As described above, the weight control unit 45 holds each weight value calculated last time, and uses the output signal x ₁ , x ₂ , x _{3, the} synthesized signal y _1, and the step size α and the above equation (2 ), (4) to (6) to update each weight value.

  Next, RLS (Recursive Least Squares) -CMA which is the second CMA will be described. In the following description, RLS-CMA is referred to as “modified CMA”.

  In the modified CMA, the weight control unit 45 calculates the error signal ε (k) by the following equation (7).

この場合における、ウエイト値ｈの更新式は、

In this case, the update formula of the weight value h is

となる。ここで、Ｒは相関行列であり、Ｒ^−１（ｋ＋１）は、以下の式（９）により求められる。

It becomes. Here, R is a correlation matrix, and R ⁻¹ (k + 1) is obtained by the following equation (9).

ここで、βは定数である。なお、実際には、変形ＣＭＡにおいても、基本ＣＭＡと同様に、上記式（８）を、各ウエイト値に適用してそれぞれ更新する。

Here, β is a constant. Actually, in the modified CMA as well as the basic CMA, the above formula (8) is applied to each weight value and updated.

以上のように、ウエイト制御部４５は、前回算出した各ウエイト値を保持しておき、出力信号ｘ_１、ｘ_２、ｘ_３、合成信号ｙ_１及びステップサイズαを用いて、上記式（７）、（９）〜（１２）により各ウエイト値を更新するのである。

As described above, the weight control unit 45 holds the weight values calculated last time, and uses the output signals x ₁ , x ₂ , x _{3, the} combined signal y _1, and the step size α to obtain the above formula (7 ), (9) to (12) to update each weight value.

  As shown in FIG. 3, the first demodulating unit includes an arctangent FM demodulating unit 51, a stereo demultiplexer 52, and a memory 53.

The arctangent FM demodulation unit 51 is adapted to synthesize a signal y ₁ output from the first adaptive antenna unit 4a is input, the the arctangent FM demodulation unit 51, FM demodulates the combined signal y ₁ The demodulated signal sf1 (an example of a sound signal) is demodulated, and the FM demodulated signal sf1 is output to the stereo demultiplexer 52 and the determination unit 7. Specifically, the arctangent FM demodulation unit 51 obtains a logarithm for each of the in-phase component yi ₁ (k) and the quadrature component yq ₁ (k) of the combined signal y ₁ (k), and takes the difference between the logarithms. tan (yi ₁ (k) / yq ₁ (k)) is calculated, and its reciprocal is taken to obtain tan ⁻¹ (k), that is, the phase of the synthesized signal y ₁ (k), and tan ⁻¹ (k) And tan ⁻¹ (k−1) is subtracted to substantially differentiate tan ⁻¹ (k) to obtain sf1 (k).

  The stereo demultiplexer 52 receives the FM demodulated signal sf1 output from the arctangent FM demodulator 51, and the stereo demultiplexer 52 converts the FM demodulated signal sf1 into the L channel audio signal sal1. The audio signal (an example of a sound signal) is output to the switch 6 separately from the R channel audio signal sar1. In FIG. 1, for convenience, the audio signal sal1 and the audio signal sar1 are shown as one audio signal sa1.

  For example, the audio signal sa <b> 1 output from the stereo demultiplexer 52 is input to the memory 53. The memory 53 is configured by, for example, a RAM (Random Access Memory) that can store an audio signal corresponding to a maximum of several minutes of audio output, and the switch 6 is switched to the terminal 6a. In some cases, the audio signal sa1 output from the stereo demultiplexer 52 is stored and the audio signal sa1 is output to the switch 6 by a FIFO (First in First Out) method.

  The memory 53 stores the audio signal sa1 corresponding to the time n set by the control unit 9 when the switch 6 is switched to the terminal 6b, and is stored first when the time n is exceeded. The audio signal sa1 is sequentially discarded. That is, the memory 53 stores the audio signal sa1 for the latest n seconds retroactively from the present.

  Note that the first demodulator 5a and the second demodulator 5b extract FM broadcast pilot signals from the FM demodulated signals, compare the phases of the pilot signals, and perform demodulation according to the phase difference. The phase of the audio signal generated by the first demodulator 5a and the second demodulator 5b may be matched by shifting the address or by shifting the address at which the audio signal is stored in the memory 53. Thereby, it is possible to reduce noise generated when the switch 6 is switched due to a shift in the timing of receiving radio waves between the antennas AT1 to AT3.

  The switch 6 includes a terminal 6a connected to the first demodulator 5a and a terminal 6b connected to the second demodulator 5b. The switch 6 is switched based on the control of the determination unit 7, and when the switch 6 is switched to the terminal 6a, the audio signal sa1 output from the first demodulation unit 5a is externally output as the audio signal sa, and the terminal 6b. When the signal is switched to the audio signal sa2, the audio signal sa2 output from the second demodulator 5b is externally output as the audio signal sa.

  The determination unit 7 receives the FM demodulated signal sf1 output from the first demodulator 5a and the FM demodulated signal sf2 output from the second demodulator 5b. Controls the switch 6 based on the signal quality of the FM demodulated signals sf1 and sf2. Specifically, the determination unit 7 compares the signal quality of the FM demodulated signal sf1 with the signal quality of the FM demodulated signal sf2, and if the signal quality of the FM demodulated signal sf1 is better, the switch 6 is connected to the terminal 6a. On the other hand, when the signal quality of the FM demodulated signal sf2 is better, the switch 6 is switched to the terminal 6b. That is, the determination unit 7 controls the switch 6 so that the audio signal having the better signal quality out of the audio signals sa1 and sa2 is output to the outside.

  In more detail, the determination unit 7 calculates the difference between the sample values of the FM demodulated signal sf1 for the time n set by the control unit 9, stores the accumulated value, and sets each sample value of the FM demodulated signal sf2. The cumulative value is stored by taking the difference between the two. Then, after the time n elapses, the determination unit 7 compares both of the accumulated values and determines that the FM demodulated signal having the smaller accumulated value has better signal quality. Since pulse-like noise appears in the FM demodulated signal affected by multipath fading, the fact that the accumulated value increases due to the noise is utilized as the signal quality is poor. As a signal quality comparison method, for example, the accumulated value of the difference between each sample value of the synthesized signal y1 and a constant value is stored, and the accumulated value of the difference between each sample value of the synthesized signal y2 and the constant value is used. You may make it memorize | store and compare both accumulated values.

  The operation unit 8 includes, for example, a power switch for turning on / off the power of the FM tuner 100, a knob and a button for performing tuning, and the control unit 9 transmits an instruction signal corresponding to a user input operation. To output.

  The control unit 9 includes, for example, a CPU (Central Processing Unit), a RAM, a ROM (Read Only Memory), an E2PROM (E Squared Programmable Read Only Memory), and the like, and reads and executes a control program stored in the ROM or the like. By doing so, the FM tuner 100 as a whole is controlled in an integrated manner.

  For example, when a channel that the user wants to receive is designated by operating the operation unit 8 by the user, the control unit 9 sets a channel to be tuned for each of the receiving unit 2a and the receiving unit 2b. . At this time, the control unit 9 sets the same channel or different channels for the receiving unit 2a and the receiving unit 2b based on the reception setting stored in the E2PROM or the like. Specifically, the control unit 9 sets a channel designated by the user for the receiving unit 2a. In addition, when the reception setting indicates that the same channel is received, the control unit 9 sets the channel specified by the user for the reception unit 2b. On the other hand, if the control unit 9 indicates that a channel with a different reception setting is received, the control unit 9 sets a channel different from the channel specified by the user to the reception unit 2b. For example, the time channel may be a predetermined channel or a channel set in advance by the user. The reception setting is set, for example, when the FM tuner 100 is shipped from the factory or by a user setting by operating the operation unit 8.

  In addition, when the user wants to receive a channel by operating the operation unit 8, the control unit 9 uses the contents of the reception setting as a control signal to the first adaptive antenna processing unit 4 a and the second adaptive antenna processing unit 4 b. It is designed to output.

[1.2 FM tuner operation]
Next, the operation of the FM tuner 100 will be described with reference to FIGS. FIG. 4 is a flowchart illustrating an example of the flow of channel setting processing of the FM tuner 100 according to the first embodiment. FIG. 5 is a flowchart illustrating an example of a process flow in the same channel reception process of the FM tuner 100 according to the first embodiment. FIG. 6 is a flowchart showing an example of the processing flow in the non-identical channel reception processing of the FM tuner 100 according to the first embodiment. In FIG. 6, the same elements as those in FIG. It is.

  First, processing at the time of channel setting will be described.

  When the user designates channel A to be received by operating the operation unit 8, as shown in FIG. 4, the control unit 9 determines whether or not the reception setting is reception of the same channel (step S1).

  At this time, if the reception setting is the same channel reception (step S1: YES), the control unit 9 sets the channel A designated by the user for both the first reception unit 2a and the second reception unit 2b. Then, the same channel reception process is executed (step S3). When the same channel reception process is completed, the control unit 9 ends the process.

  On the other hand, when the reception setting is not the same channel reception (step S1: NO), the control unit 9 sets the channel A designated by the user to the first reception unit 2a (step S4), and the channel A channel B different from A is set for the second receiver 2b (step S5), and then non-identical channel reception processing is executed (step S6). When the non-identical channel reception process is completed, the control unit 9 ends the process.

  Next, the same channel reception process in step S3 of FIG. 4 will be described.

  As shown in FIG. 5, first, the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b set CMA of the same algorithm as the adaptive algorithm based on the control signal from the control unit 9. Then, parameters used in this adaptive algorithm are set (step S11).

Specifically, the first adaptive antenna processing unit 4a, as the step size alpha _A, for example, set to 1/128, a second adaptive antenna processor 4b as step size alpha _B, smaller than step alpha _A, For example, 1/256 is set. As described above, since the convergence speed of the square error and the stability after convergence change depending on the step size, the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b are different from each other. By setting the size, it is possible to output a more optimal audio signal according to the situation.

  Moreover, the determination part 7 sets t1 as time n. This t1 is, for example, several tens of milliseconds to several seconds.

  Next, the first reception signal processing unit 1a and the second reception signal processing unit 1b perform reception operations in parallel (steps S12 and S13).

Specifically, the first received signal processing unit 1a, the receiving unit 2a performs the tuning operation of the channel A, the first adaptive antenna processing portion 4a performs an adaptive operation at the set adaptive algorithm and step size alpha _A, The first demodulator 5a performs a demodulation operation, and stores the audio signal sa1 in the memory 53 inside the first demodulator 5a (step S12). At this time, the determination unit 7 takes the difference of each sample of the FM demodulated signal sf1 and stores the accumulated value.

In the second reception signal processing unit 1b, the receiving unit 2b performs the tuning operation of the channel A, a second adaptive antenna processing portion 4b performs an adaptive operation at the set adaptive algorithm and step size alpha _B, second The demodulator 5b performs a demodulation operation, and stores the audio signal sa2 in the memory 53 inside the second demodulator 5b (step S13). At this time, the determination unit 7 takes the difference of each sample of the FM demodulated signal sf2, and stores the accumulated value.

  Then, after the elapse of time n, the determination unit 7 compares the stored cumulative values (step S14), and the internal of the demodulation unit that determines that the cumulative value is smaller, that is, the signal quality is better. The switch 6 is controlled so that the audio signal stored in the memory 53 is output externally (step S15).

  Next, the control unit 9 determines whether or not to end the reception operation (step S16). As the end timing of the reception operation, for example, when the user selects power OFF, there is a case where the channel is tuned to another channel.

  Here, the control part 9 transfers to step S12 and S13, and not repeats the process of step S12-S16, when not complete | finishing receiving operation (step S16: NO). At this time, in steps S12 and S13, the audio signal stored in the memory 53 in the demodulator that has been determined to have good signal quality is sequentially output externally and the audio signal output from the stereo demultiplexer 52 is output. Is stored in the memory 53.

  On the other hand, when ending the reception operation (step S16: YES), the control unit 9 ends the same channel reception process.

  Next, the non-identical channel reception process in step S6 of FIG. 4 will be described.

  As shown in FIG. 6, first, the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b set CMAs of different algorithms as adaptive algorithms based on the control signal from the control unit 9. Then, parameters used in this adaptive algorithm are set (step S21).

Specifically, the first adaptive antenna processing unit 4a sets a basic CMA as the adaptive algorithm, as a step size alpha _A, for example, while setting the 1/128, a second adaptive antenna processing unit 4b, adaptive algorithm Is set as the step size α _B and 1/128, which is the same as the step α _A , is set. When it is assumed that the FM tuner 100 is mounted on an automobile, the radio wave condition is expected to be inferior, so that the step size α _B = set in the same channel reception process is set to speed up convergence of the multiplication error. A value larger than 1/256 was set. It is not always necessary to set the same value for the step size α _A and the step size α _B.

  Moreover, the determination part 7 sets t2 as time n. This t2 is larger than t1 set in the same channel reception process, for example, about several minutes. In the present embodiment, one of the audio signal sa1 and the audio signal sa2 having the better signal quality is output to the outside. However, the first received signal processing unit 1a and the second received signal processing unit 1b If the value of time n is reduced when receiving operations on different channels, broadcasts that can be heard by the user as voice frequently occur in places where the radio wave condition is bad, which causes discomfort to the user. End up. Therefore, the time n is determined to be about the performance time of one song.

  Next, the first reception signal processing unit 1a and the second reception signal processing unit 1b perform reception operations in parallel (steps S12 and S22). In this reception operation, in the first reception signal processing unit 1a, the reception unit 2a performs a tuning operation for channel A, while in the second reception signal processing unit 1b, the reception unit 2b performs a tuning operation for channel B (step S22). ).

  Then, after the time n has elapsed, the determination unit 7 compares the stored accumulated values (step S14), and the audio signal stored in the memory 53 inside the demodulating unit with the smaller accumulated value is obtained. The switch 6 is controlled to output externally (step S15).

  Next, the control unit 9 determines whether or not to end the receiving operation (step S16). If the receiving operation is not ended (step S16: NO), the control unit 9 proceeds to steps S12 and S22 and ends the receiving operation. If it is to be performed (step S16: YES), the non-identical channel reception process is terminated.

  As described above, according to the present embodiment, the first reception signal processing unit 1a and the second reception signal processing unit 1b generate the FM demodulated signal and the audio signal, respectively, and the determination unit 7 performs the first reception. Any one of the audio signals generated by the first reception signal processing unit 1a and the second reception signal processing unit 1b based on the FM demodulated signals generated by the signal processing unit 1a and the second reception signal processing unit 1b, respectively. One of them is selected, and the switch 6 outputs the selected audio signal externally. At this time, when the first receiving unit 2a and the second receiving unit 2b are tuned to the same channel, the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b use the same adaptive algorithm. When the first receiving unit 2a and the second receiving unit 2b are tuned to different channels, the first adaptive antenna processing unit 4a is used. And the second adaptive antenna processing unit 4b perform adaptive operations using different adaptive algorithms.

  Therefore, when performing reception operation on the same channel, the same adaptive algorithm and different step sizes are used, and switching output is appropriately performed according to the signal quality of the FM demodulated signal. Even if the directivity of AT3 is controlled in the wrong direction, it can be compensated for on the other side, and both the convergence speed of the square error and the stability after convergence can be made compatible. On the other hand, when performing reception operations for different channels, different adaptive algorithms are used, and switching output is appropriately performed according to the signal quality of the FM demodulated signal, so the distance, direction, etc. from the FM tuner 100 to the broadcast station, etc. Therefore, it is possible to cope with a case where reception environments are different between channels.

  Thus, according to the present embodiment, it is possible to improve reception performance in response to all radio wave conditions.

[2. Second Embodiment]
Next, a second embodiment will be described. In the second embodiment described below, when the first reception signal processing unit and the second reception signal processing unit perform reception operations on different channels, the second reception signal processing unit outputs a demodulated audio signal. Implementation when the first received signal processing unit outputs the audio signal stored in the second received signal processing unit when the first received signal processing unit cannot receive the channel specified by the user. It is a form.

[2.1 FM tuner configuration]
First, the configuration of the FM tuner 101 according to the second embodiment will be described with reference to FIG. FIG. 7 is a block diagram showing an example of a schematic configuration of the FM tuner 101 according to the second embodiment. In FIG. 7, the same reference numerals are given to the same elements as those in FIG.

  As shown in FIG. 7, the FM tuner 101 according to the present embodiment has an FM described in the first embodiment in that a storage unit 10 as an example of a storage unit is added to the second received signal processing unit 1 b. Different from the tuner 100. Here, the switch 6 and the second demodulator 5b constitute signal output means according to the present embodiment.

  The storage unit 10 is input with the audio signal sa2 output from the second adaptive antenna processing unit. The storage unit 10 is configured by, for example, a RAM or a hard disk drive capable of storing an audio signal corresponding to an audio output of a maximum of several hours to several tens of hours, and the switch 6 is switched to the terminal 6a. If so, the audio signal sa2 output from the second adaptive antenna processing unit is stored.

  In addition, when the switch 6 is switched to the terminal 6b, the storage unit 10 stores the audio signal sa2 output from the second adaptive antenna processing unit by a FIFO (First in First out) method, and The audio signal sa2 is output.

  The determination unit 7 according to the present embodiment operates in the same manner as in the first embodiment when the first reception signal processing unit 1a and the second reception signal processing unit 1b perform reception operations on the same channel. However, when the first reception signal processing unit 1a and the second reception signal processing unit 1b perform reception operations on different channels, operations different from those in the first embodiment are performed. .

  Specifically, the determination unit 7 controls the switch 6 in accordance with the radio wave reception status in the first reception signal processing unit 1a. More specifically, the determination unit 7 compares the level of the FM demodulated signal sf1 output from the first demodulator 5a with a predetermined level value. When the level of the FM demodulated signal sf1 is equal to or higher than the predetermined level value, the determination unit 7 determines that the broadcast wave of the channel specified by the user is received, and switches the switch 6 to the terminal 6a. On the other hand, when the level of the FM demodulated signal sf1 is less than the predetermined level value, it is determined that the broadcast wave of the channel designated by the user has not been received, and the switch 6 is switched to the terminal 6b. .

  That is, the determination unit 7 controls the switch 6 so that the audio signal sa1 output from the first demodulation unit 5a is output to the outside while the broadcast wave of the channel specified by the user is received. When the broadcast wave of the channel designated by the user is not received, the switch 6 is controlled so that the audio signal sa2 stored in the storage unit 10 is output to the outside.

[2.2 FM tuner operation]
Next, the operation of the FM tuner 101 will be described with reference to FIG. FIG. 8 is a flowchart showing an example of the processing flow in the non-identical channel reception processing of the FM tuner 101 according to the second embodiment. In FIG. 8, the same elements as those in FIG. is there.

  In addition, since the process at the time of channel setting and the same channel reception process are the same as those of the first embodiment, only the non-identical channel reception process will be described below.

As shown in FIG. 8, first, the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b set CMAs of different algorithms as adaptive algorithms based on the control signal from the control unit 9. (The first adaptive antenna processing unit 4a is a basic CMA and the second adaptive antenna processing unit 4b is a modified CMA), and parameters used in this adaptive algorithm are set (for example, α _A = 1/128, α _B = 1). / 128). Moreover, the determination part 7 sets t2 as time n (step S21).

  Next, the first reception signal processing unit 1a and the second reception signal processing unit 1b perform reception operations in parallel (steps S31 and S32). In this reception operation, the determination unit 7 switches the switch 6 to the terminal 6a and externally outputs the audio signal sa1 output from the first demodulation unit 5a (step S31). In the second received signal processing unit 1b, the audio signal sa2 output from the second demodulating unit 5b is stored in the storage unit 10 (step S32).

  Then, after the elapse of time n, the determination unit 7 determines whether or not a broadcast wave of channel A is received based on the level of the audio signal sa1 output from the first demodulation unit (step S33). At this time, when the broadcast wave of channel A is received, the control unit 9 then determines whether or not to end the receiving operation (step S16), and when not ending the receiving operation (step S16). (S16: NO), the process proceeds to steps S31 and S32, and if the reception operation is to be terminated (step S16: YES), the non-identical channel reception process is terminated.

  On the other hand, when the broadcast wave of channel A is not received, the determination unit 7 switches the switch 6 to the terminal 6b. Accordingly, the audio signal sa1 is stored in the memory 53 inside the first demodulator 5a while the reception operation is continued in the first received signal processor 1a (step S34). Further, the audio signal sa2 stored in the storage unit 10 is output to the outside while the reception operation is continued in the second received signal processing unit 1b (step S35).

  Then, after the time n elapses, the process proceeds to step S33, and it is determined whether or not the broadcast wave of channel A is received. If the broadcast wave of channel A has not been received yet, the external output of the audio signal sa2 stored in the storage unit 10 is continued (steps S34 and S35), and the broadcast wave of channel A is received. In this case, the switch 6 is switched to the terminal 6a, and the audio signal sa1 output from the first demodulator 5a is output externally.

  As described above, according to the present embodiment, in addition to the effect of the operation of the FM tuner 100 according to the first embodiment, the first receiver 2a and the second receiver 2b are tuned to different channels. In the second reception signal processing unit 1b, the demodulated audio signal sa2 is stored in the storage unit 10, and when the broadcast wave of the channel designated by the user is received, the first demodulation unit When the audio signal sa1 output from 5a is externally output and the broadcast wave of the channel specified by the user is not received, the audio signal sa2 stored in the storage unit 10 is externally output. When you enter a tunnel where FM broadcasts are not retransmitted, or when you enter a place surrounded by mountains, you can broadcast the specified channel. During There adapted not hear at all, the user can listen to the broadcast of a different channel.

[3. Third Embodiment]
Next, a third embodiment will be described. The third embodiment described below is an embodiment in which an FM tuner is mounted on a navigation device and a reception operation is performed based on information acquired by the navigation device.

[3.1 Configuration of navigation device]
First, the configuration of the navigation device 200 according to the third embodiment will be described with reference to FIG. FIG. 9 is a block diagram illustrating an example of a schematic configuration of the navigation device 200 according to the third embodiment.

  As shown in FIG. 9, the navigation device 200 includes a GPS receiving unit 201 that receives GPS (Global Positioning System) data, a sensor unit 202 that detects traveling data such as a traveling speed, acceleration, and traveling direction of the vehicle, and a GPS An interface unit 203 that calculates the position of the vehicle based on the data and the running data; an FM tuner 102 that receives an FM broadcast and supplies an audio signal sa and VICS (Vehicle Information Communication System) data (an example of traffic information); An HD (Hard Disc) drive 204 that writes and reads data to and from a hard disk that stores various data such as map data, a DVD drive 205 that reads various data from a DVD disk (Digital Versatile Disk), route guidance, A voice processing unit 20 that generates voice for operation guidance and the like A speaker 207 that outputs the sound generated by the sound processing unit 206 as a sound wave of an audible frequency, an operation unit 208 used when a user inputs a command to the system, and displays map data, a vehicle position, and the like. The display unit 209 includes a display control unit 211 that controls the display unit 209 using the buffer memory 210, a system control unit 212 that controls the entire system, and a RAM / ROM 213. The system control unit 212 and each unit Are connected to each other by a system bus 214.

  The operation unit 208 as an example of an input unit includes a remote control device having various buttons (including buttons for controlling the FM tuner 102), numeric keys, cursor keys, and the like. A corresponding instruction signal is output to the system control unit 212.

  The system control unit 212 is mainly configured by a CPU (Central Processing Unit), and controls the entire navigation device 200. The system control unit 212 reads a control program stored in the HD drive 204, the RAM / ROM 213, and performs various processes. While being executed, the RAM / ROM 213 temporarily stores data being processed.

  For example, the system control unit 212 controls the host vehicle position data output from the interface unit 203, the map data read from the hard disk by controlling the HD drive 204, the destination information set by the operation unit 208, and the FM tuner. Based on the VICS data sv output from 102, a route search to the destination is performed.

  Further, the system control unit 212 performs correction processing such as map matching based on the own vehicle position data and map data when performing route guidance, and the display unit 209 indicates a surrounding area including the current position of the vehicle. Control is performed so that route guidance information is displayed on the map, and route guidance information is output from the voice processing unit 206 as voice.

  Further, the system control unit 212 controls the display unit 209 to display the traffic information based on the VICS data sv, and controls the traffic processing unit 206 to output the traffic information as voice. ing.

  Furthermore, the system control unit 212 causes the sound corresponding to the audio signal sa output from the FM tuner 102 to be amplified by the sound processing unit 206 and the speaker 207 based on a user operation by the operation unit 208, or the audio signal The sa is stored in a hard disk by an HD drive or stored in a DVD disk that can be stored by a DVD drive.

  Furthermore, the system control unit 212 outputs a tuner control signal sc including vehicle speed data output from the interface unit 203 to the FM tuner 102, or a tuner including a channel specified by the user operating the operation unit 8. A control signal sc is output to the FM tuner 102.

[3.2 Configuration of FM tuner]
Next, the configuration of the FM tuner 102 according to the third embodiment will be described with reference to FIG. FIG. 10 is a block diagram showing an example of a schematic configuration of the FM tuner 102 according to the third embodiment. In FIG. 10, the same elements as those in FIG. 1 are denoted by the same reference numerals. FIG. 11 is a block diagram showing an example of a schematic configuration of the second demodulator 5b according to the third embodiment. In FIG. 11, elements similar to those in FIG.

  As shown in FIG. 10, the FM tuner 102 according to this embodiment is different from the FM tuner 100 described in the first embodiment in that the operation unit 8 is not provided.

  The audio signal sa output from the switch 6 is supplied to the audio processing unit 206 and the like via the system bus 214.

  From the second demodulator 5b, VICS data sv including traffic information such as traffic jam information, required time, information on traffic closure, information on speed regulation and lane regulation, and information on parking locations and empty vehicles is output. The VICS data is supplied to the system control unit 212 via the system bus 214.

  As shown in FIG. 11, the second demodulator 5b according to this embodiment is different from the first demodulator 5b according to the first embodiment in that a VICS decoder 54 is added.

  The VICS decoder 54 receives the FM demodulated signal sf2 output from the arctangent FM demodulator 51. The VICS decoder 54 receives, for example, NHK (registered trademark) from the second receiver 2b. When tuning to a channel on which VICS information such as FM is multiplexed, VICS information is extracted from the FM demodulated signal sf2 and output as VICS data.

  The control unit 9 as an example of the speed information receiving unit receives the tuner control signal sc output from the system control unit 212, and information on the channel specified by the user is included in the tuner control signal sc. If included, the channel to be received is set for each of the first receiver 2a and the second receiver 2b based on the reception setting. In addition, when the vehicle speed data is included in the tuner control signal sc, the control unit 9 transmits the vehicle speed data to the first receiving unit 2a, the second receiving unit 2b, the first adaptive antenna processing unit 4a, and the second The data is output to the adaptive antenna processing unit 4b.

  The first receiver 2a and the second receiver 2b as an example of time constant setting means set the time constant of AGC based on the vehicle speed data output from the controller 9, respectively. Specifically, the first receiving unit 2a and the second receiving unit 2b set the time constant so that the change in the gain of the variable amplifier becomes faster as the vehicle speed increases.

  As the moving speed of the vehicle increases, the degree of change in the reception level of broadcast waves also increases due to the effects of multipath fading and shadowing. Therefore, by changing the time constant according to the vehicle speed, the A / D conversion units 311 to 316 can convert the signals into digital signals at an appropriate level. The first adaptive antenna processing unit 4a and the second adaptive antenna processing The convergence speed of the square error in the part 4b and the stability after the convergence can be increased.

  Vehicle speed data output from the control unit 9 is input to the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b, and the first adaptive antenna processing unit 4a and the second adaptive antenna processing The unit 4b is configured to set the step size α according to the vehicle speed.

Specifically, each of the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b sets a larger value as the step size α as the vehicle speed increases, that is, the convergence speed of the square error as the vehicle speed increases. Is raised. As a method of setting the step size α, for example, α ₁ is set when the speed is less than a predetermined speed, α ₂ is set when the speed is equal to or higher than the predetermined speed (α ₁ <α ₂ ), For example, it may be obtained by calculating α = sK1 + K2 (K1 and K2 are constants) with the speed s as a variable, or set based on a table stored in a ROM or the like.

[3.3 Operation of FM tuner]
Next, the operation of the FM tuner 102 will be described with reference to FIGS. FIG. 12 is a flowchart showing an example of a process flow in the same channel reception process of the FM tuner 102 according to the third embodiment. In FIG. 12, the same elements as those in FIG. 5 are denoted by the same reference numerals. . FIG. 13 is a flowchart showing an example of the processing flow in the non-identical channel reception processing of the FM tuner 102 according to the third embodiment. In FIG. 13, the same components as those in FIG. It is.

  Since the processing at the time of channel setting is the same as in the first embodiment, detailed description thereof is omitted.

  First, the same channel reception process will be described.

As shown in FIG. 12, first, the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b set CMAs of the same algorithm as the adaptive algorithm based on the control signal from the control unit 9. In addition, parameters used in this adaptive algorithm are set (for example, α _A = 1/128, α _B = 1/256). Moreover, the determination part 7 sets t1 as time n (step S11).

Next, the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b output the step size α as a tuner control signal based on the vehicle speed data output from the navigation device 200 to the control unit 9 and output from the control unit 9. _a, update sets the alpha _B, the first receiving portion 2a and the second receiving unit 2b sets the time constant of the AGC (step S41).

  Next, as in the case of the first embodiment, the first reception signal processing unit 1a and the second reception signal processing unit 1b perform reception operations in parallel (steps S12 and S13). When the channel A is a channel on which VICS information is multiplexed, in the second received signal processing unit 1b, the VICS decoder 54 extracts the VICS information from the FM demodulated signal sf2, and the VICS data sv To the system control unit 212 of the navigation device 200.

  Then, after the time n has elapsed, the determination unit 7 compares the stored accumulated values (step S14), and the audio signal stored in the memory 53 inside the demodulating unit with the smaller accumulated value is obtained. The switch 6 is controlled so as to be output to the navigation device 200 (step S15).

  Next, the control unit 9 determines whether or not to end the receiving operation (step S16). If the receiving operation is not ended (step S16: NO), the control unit 9 proceeds to steps S12 and S13 and ends the receiving operation. If it is to be performed (step S16: YES), the non-identical channel reception process is terminated.

  Next, only non-identical channel reception processing will be described. As a premise for the following description, it is assumed that the channel B set for the second receiving unit 2b is a channel on which VICS information is multiplexed.

First, the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b set CMAs of different algorithms as adaptive algorithms based on the control signal from the control unit 9 (first adaptive antenna processing unit 4a is a basic CMA, the second adaptive antenna processing unit 4b is a modified CMA), and parameters used in this adaptive algorithm are set (for example, α _A = 1/128, α _B = 1/128). Moreover, the determination part 7 sets t2 as time n (step S51).

Next, based on the vehicle speed data output from the control unit 9, the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b update and set the step sizes α _A and α _B , and the first receiving unit 2a and The second receiving unit 2b sets the AGC time constant (step S41).

  Next, the first reception signal processing unit 1a and the second reception signal processing unit 1b perform reception operations in parallel (steps S12 and S52). In this reception operation, in the second reception signal processing unit 1b, the VICS decoder 54 extracts the VICS information from the FM demodulated signal sf2, and outputs it as VICS data to the system control unit 212 of the navigation device 200 (step S52).

  Then, after the time n has elapsed, the determination unit 7 compares the stored accumulated values (step S14), and the audio signal stored in the memory 53 inside the demodulating unit with the smaller accumulated value is obtained. The switch 6 is controlled so as to be output to the navigation device 200 (step S15).

  Next, the control unit 9 determines whether or not to end the reception operation (step S16). If the reception operation is not ended (step S16: NO), the control unit 9 proceeds to steps S12 and S52 and ends the reception operation. If it is to be performed (step S16: YES), the non-identical channel reception process is terminated.

  As described above, according to the present embodiment, in addition to the effect by the operation of the FM tuner 102 according to the first embodiment, the control unit 9 receives the vehicle speed data from the navigation device 200 and performs the first received signal processing. Since the unit 1a and the second received signal processing unit 1b set the step size α based on the vehicle speed data, respectively, it is possible to select the optimum convergence speed of the square error and the stability after convergence according to the vehicle speed. it can.

  Moreover, since the 1st receiving part 2a and the 2nd receiving part 2b set the time constant of AGC based on vehicle speed data, in A / D conversion parts 311-316, it converts into a digital signal with an appropriate level. Thus, the convergence speed of the square error and the stability after the convergence degree in the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b can be increased.

  Further, the second demodulator 5b demodulates the combined signal y2 output from the second adaptive antenna processor 4b to generate the audio signal sa2 and the VICS data sv. When the first receiver 2a is tuned to the channel designated by the user and the second receiver 2b is tuned to the channel in which the VICS information is multiplexed, the audio signal sa is output from the switch 6. At the same time, since the VICS data is output from the second demodulator 5b, even if a channel on which VICS information is not multiplexed is designated by the user, the user can broadcast the channel designated by the user. At the same time, the navigation apparatus 200 can perform processing such as route guidance and traffic guidance based on the VICS data.

  In the case where the vehicle passes through an intersection in an urban area, for example, the first adaptive antenna processing unit 2a controls to increase the directivity weight of the antennas AT1 to AT3 in the traveling direction of the vehicle, The second adaptive antenna processing unit 4b may perform control so as to increase the weight of directivity of the antennas AT1 to AT3 in the extending direction of the road that intersects the road on which the vehicle travels. On a road surrounded by buildings, radio waves can be easily transmitted along the road. Therefore, reception performance can be improved by performing control as described above.

[4. Fourth Embodiment]
Next, a fourth embodiment will be described.
The fourth embodiment described below is an embodiment in which an FM tuner is mounted on a navigation device and a storage unit is provided in the second received signal processing unit.

[4.1 Configuration of FM tuner]
First, the configuration of the FM tuner 103 according to the fourth embodiment will be described with reference to FIG. FIG. 14 is a block diagram illustrating an example of a schematic configuration of the FM tuner 103 according to the fourth embodiment. In FIG. 14, elements similar to those in FIG. 10 are denoted by the same reference numerals.

  As shown in FIG. 14, the FM tuner 103 according to the present embodiment has an FM described in the third embodiment in that a storage unit 10 as an example of a storage unit is added to the second received signal processing unit 1 b. Different from the tuner 102. In addition, since the structure of the memory | storage part 10 is the same as that of the case of 2nd Embodiment, detailed description is abbreviate | omitted.

  In the present embodiment, the system control unit 212 of the navigation device 200 determines the current vehicle position based on the vehicle position data output from the interface unit 203 and the map data read from the hard disk by controlling the HD drive 204. The FM broadcast reception environment at the position is specified, and a tuner control signal sc including reception environment data (an example of environment information) indicating the reception environment is output to the FM tuner 103. The reception environment data includes, for example, whether the vehicle is traveling in a tunnel where FM broadcasts are not retransmitted (except for very short tunnels) in the region where the vehicle is traveling. A list of possible FM broadcasts (channels) is included.

  The control unit 9 is configured to output the reception environment data input as the tuner control signal sc to the determination unit 7, and the first reception signal processing unit 1a and the second reception signal processing unit 1b are different channels. When the receiving operation is performed, the determination unit 7 controls the switch 6 based on the radio wave reception status and the reception environment data in the first reception signal processing unit 1a.

[4.2 FM tuner operation]
Next, the operation of the FM tuner 103 will be described with reference to FIG. FIG. 15 is a flowchart showing an example of the processing flow in the non-identical channel reception processing of the FM tuner 103 according to the fourth embodiment. In FIG. 15, the same elements as those in FIG. is there.

  In addition, since the process at the time of channel setting and the same channel reception process are the same as those of the third embodiment, only the non-identical channel reception process will be described below.

First, the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b set CMAs of different algorithms as adaptive algorithms based on the control signal from the control unit 9 (first adaptive antenna processing unit 4a is a basic CMA, the second adaptive antenna processing unit 4b is a modified CMA), and parameters used in this adaptive algorithm are set (for example, α _A = 1/128, α _B = 1/128). Moreover, the determination part 7 sets t2 as time n (step S51).

Next, based on the vehicle speed data output from the control unit 9, the first adaptive antenna processing unit 4a and the second adaptive antenna processing unit 4b update and set the step sizes α _A and α _B , and the first receiving unit 2a and The second receiving unit 2b sets the AGC time constant (step S41).

  Next, the first reception signal processing unit 1a and the second reception signal processing unit 1b perform reception operations in parallel (steps S61 and S62). In this reception operation, the determination unit 7 switches the switch 6 to the terminal 6a, and causes the navigation device 200 to output the audio signal sa1 output from the first demodulation unit 5a (step S61). In the second received signal processing unit 1b, the audio signal sa2 output from the second demodulation unit 5b is stored in the storage unit 10, and the VICS data sv is transmitted from the second demodulation unit 5b to the system bus 214 of the navigation device 200. Is output (step S62).

  Next, after the elapse of time n, the determination unit 7 determines whether or not the broadcast wave of channel A is received based on the level of the audio signal sa1 output from the first demodulation unit (step S63). At this time, when the broadcast wave of channel A is received, the control unit 9 then determines whether or not to end the receiving operation (step S16), and when not ending the receiving operation (step S16). (S16: NO), the process proceeds to steps S61 and S62, and if the reception operation is to be terminated (step S16: YES), the non-identical channel reception process is terminated.

  On the other hand, when the broadcast wave of channel A is not received, the determination unit 7 is based on the reception environment data output from the control unit 9, and the vehicle is not currently retransmitting the FM broadcast. It is determined whether the vehicle is traveling (step S64). At this time, if the vehicle is not traveling in a tunnel where the FM broadcast is not currently being retransmitted (step S64: NO), the process proceeds to step S16.

  On the other hand, when the vehicle is traveling in a tunnel where the FM broadcast is not currently being retransmitted (step S64: YES), the determination unit 7 switches the switch 6 to the terminal 6b and stores it in the storage unit 10. The audio signal sa2 that has been recorded is output to the navigation device 200 (step S65).

  Even when the first received signal processing unit 1a cannot receive the broadcast wave of the channel A to be received, it is preferable not to perform switching if it is temporary. Therefore, if the vehicle enters a tunnel where FM broadcasts are not retransmitted, it is impossible to receive FM broadcasts for a while, so switching is performed at this timing. .

  Then, after the elapse of time n, the determination unit 7 determines whether or not the vehicle has exited the tunnel based on the reception environment data output from the control unit 9 (step S66). At this time, when the vehicle has not passed through the tunnel (step S66: NO), the process proceeds to step S65, and the output of the audio signal sa2 stored in the storage unit 10 is continued.

  On the other hand, when the vehicle has passed through the tunnel (step S66: YES), the determination unit 7 determines whether the region where the vehicle is currently traveling is a region where the channel A can be received based on the reception environment data. Is determined (step S67). At this time, when the area where the vehicle is currently traveling is an area where the channel A can be received (step S67: YES), the process proceeds to step S41.

  On the other hand, if the region where the vehicle is currently traveling is not a region where channel A can be received (step S67: NO), a channel which can be received in the region where the vehicle is currently traveling based on the reception environment data. (A channel different from channel A) is set for the first receiver 2a (step S68), and the process proceeds to step S41. Thereby, in step S61, the first reception signal processing unit 1a performs a reception operation on the channel set in step S68.

  After the vehicle exits the tunnel, the vehicle may be completely separated from the broadcast service area of channel A. In this embodiment, in the area where the vehicle is traveling based on the reception environment data. It was decided to set a receivable channel.

  As described above, according to the present embodiment, in addition to the effects of the operations of the FM tuner 101 according to the second embodiment and the FM tuner 102 according to the third embodiment, the first receiver 2a and the second receiver When the tuning unit 7 is tuned to a channel different from that of 2b, the determination unit 7 retransmits the FM broadcast based on the radio wave reception status and reception environment data in the first reception signal processing unit 1a. Since the switch 6 is controlled according to whether or not the vehicle is traveling in a tunnel, the output of the audio signal sa1 from the first reception signal processing unit 1a and the output of the audio signal sa2 from the second reception signal processing unit And can be switched smoothly.

  Note that the switching control of the switch 6 may be performed in a mountain where FM broadcasts cannot be received at all, for example.

[5. Fifth Embodiment]
Next, a fifth embodiment will be described. The fifth embodiment described below is an embodiment in which an FM tuner is mounted on a navigation device and an adaptive operation and a demodulation operation are performed only in the first received signal processing unit 1a.

[5.1 Configuration of FM tuner]
First, the configuration of the FM tuner 104 according to the fifth embodiment will be described with reference to FIG. FIG. 16 is a block diagram showing an example of a schematic configuration of the FM tuner 104 according to the fifth embodiment. In FIG. 16, elements similar to those in FIG. 14 are denoted by the same reference numerals.

  As shown in FIG. 16, the FM tuner 104 includes antennas AT1 to AT3, a first reception signal processing unit 1a, a second reception signal processing unit 1b, a determination unit 7, and a control unit 9. Has been.

  The first received signal processing unit 1a includes a first receiving unit 2a, a first signal converting unit 3a, switches 11 to 13, a first adaptive antenna processing unit 4a, and a first demodulating unit 5a. . On the other hand, the second received signal processing unit 1b includes a second receiving unit 2b, a second signal converting unit 3b, and a storage unit 10.

  In the second received signal processing unit 1b, output signals x4, x5, and x6 output from the filter units 334 to 335 are input to the storage unit 10, and the storage unit 10 outputs the output signal x4. , X5 and x6 are stored.

  In the first received signal processing unit 1a, the switch 11 includes terminals 11a and 11b, the switch 12 includes terminals 12a and 12b, the switch 13 includes terminals 13a and 13b, and the terminals 11a, 12a, and 13a respectively. The filter units 331, 332, and 333 are connected, and the terminals 11b, 12b, and 13b are connected to the storage unit 10, respectively.

  The switches 11 to 13 are switched to any one of the terminals 11a, 12a and 13a, or the terminals 11b, 12b and 13b based on the control of the determination unit 7, and the switches 11 to 13 are terminals. 11a, 12a and 13a, the output signals x1, x2 and x3 output from the filter units 331 to 333 are input to the first adaptive antenna processing unit 4a, and the switches 11 to 13 are connected to the terminal 11b, When switched to 12b and 13b, the output signals x4, x5, and x6 stored in the storage unit 10 are input to the first adaptive antenna processing unit 4a.

  The first demodulator 5a includes an arctangent demodulator 51, a stereo multiplexer 52, a memory 53, and a VICS decoder 54. The first demodulator 5a outputs the combined signal y1 output from the first adaptive antenna processor 4a. The FM demodulated signal sf1 is demodulated and output to the determination unit 7, and the audio signal sa1 and the VICS data sv are output to the navigation device 200.

  The determination unit 7 controls the switch 6 in accordance with the radio wave reception status in the first reception signal processing unit 1a. In the present embodiment, the first receiving unit 2a and the second receiving unit receive signals from the control unit 9 so that the first received signal processing unit 1a and the second received signal processing unit 1b perform only different channel receiving operations. Channel setting is performed for the unit 2b.

[5.2 FM tuner operation]
Next, the operation of the FM tuner 103 will be described with reference to FIG. FIG. 17 is a flowchart showing an example of the processing flow in the non-identical channel reception processing of the FM tuner 104 according to the fifth embodiment. In FIG. 17, the same components as those in FIG. is there.

  At the time of channel setting, the control unit 9 sets the channel A designated by the user to the first receiving unit 2a and sets a channel B different from the channel A to the second receiving unit 2b. To do. Further, since the same channel reception process is not performed in the present embodiment, only the non-identical channel reception process will be described below.

First, the first adaptive antenna processing unit 4a sets CMA as an adaptive algorithm based on the control signal from the control unit 9, and sets parameters used in the adaptive algorithm (for example, α _A = 1 / 128). Moreover, the determination part 7 sets t2 as time n (step S71).

Then, based on the vehicle speed data outputted from the control unit 9, the first adaptive antenna processing unit 4a updates setting the step size alpha _A, the first receiving portion 2a and the second receiving unit 2b, when the AGC constant Is set (step S72).

  Next, the first reception signal processing unit 1a and the second reception signal processing unit 1b perform reception operations in parallel (steps S61 and S73). In this reception operation, the determination unit 7 switches the switches 11 to 13 to the terminals 11a, 12a, and 13a, and outputs the output signals x1, x2, and x3 output from the first signal conversion unit 3a to the first adaptive antenna processing unit 4a. Based on the output signal, adaptive operation and demodulation operation are performed in the first received signal processing unit 1a (step S61). When channel A is a channel on which VICS information is multiplexed, VICS data is output from the first demodulator 5a to the navigation device 200. On the other hand, in the second received signal processing unit 1b, the output signals x4, x5, and x6 output from the second signal conversion unit 3b are stored in the storage unit 10 (step S73).

  Then, after the elapse of time n, the determination unit 7 determines whether or not the broadcast wave of channel A is received based on the level of the audio signal sa1 output from the first demodulation unit (step S63). At this time, when the broadcast wave of channel A is received, the control unit 9 then determines whether or not to end the receiving operation (step S16), and when not ending the receiving operation (step S16). (S16: NO), the process proceeds to steps S61 and S73, and if the reception operation is to be terminated (step S16: YES), the non-identical channel reception process is terminated.

  On the other hand, when the broadcast wave of channel A is not received, the determination unit 7 is based on the reception environment data output from the control unit 9, and the vehicle is not currently retransmitting the FM broadcast. It is determined whether the vehicle is traveling (step S64). At this time, if the vehicle is not traveling in a tunnel where the FM broadcast is not currently being retransmitted (step S64: NO), the process proceeds to step S16.

On the other hand, when the vehicle is traveling in a tunnel where the FM broadcast is not currently being retransmitted (step S64: YES), the determination unit 7 switches the switches 11 to 13 to the terminals 11b, 12b, and 13b. Then, x4, x5 and x6 stored in the storage unit 10 are input to the first adaptive antenna processing unit 4a, whereby the first reception signal processing unit 1a performs adaptive operation and demodulation operation based on the output signal. Is performed (step S74). When channel B is a channel on which VICS information is multiplexed, VICS data is output from first demodulator 5a to navigation device 200. At this time, the first adaptive antenna processing unit 4a may be set to CMA algorithm is different from the set CMA in step S71, sets a different step size from the step size alpha _A set in step S71 You may do it.

  On the other hand, in the second received signal processing unit 1b, the output signals x4, x5, and x6 output from the second signal conversion unit 3b are stored in the storage unit 10 (step S75).

  Then, after the elapse of time n, the determination unit 7 determines whether or not the vehicle has exited the tunnel based on the reception environment data output from the control unit 9 (step S66). At this time, if the vehicle has not passed through the tunnel (step S66: NO), the process proceeds to steps S74 and S75.

  On the other hand, when the vehicle has passed through the tunnel (step S66: YES), the determination unit 7 determines whether the region where the vehicle is currently traveling is a region where the channel A can be received based on the reception environment data. Is determined (step S67). At this time, when the area where the vehicle is currently traveling is an area where the channel A can be received (step S67: YES), the process proceeds to step S72.

  On the other hand, if the region where the vehicle is currently traveling is not a region where channel A can be received (step S67: NO), a channel which can be received in the region where the vehicle is currently traveling based on the reception environment data. Is set for the first receiver 2a (step S68), and the process proceeds to step S72.

  As described above, according to the present embodiment, the first receiving unit 2a and the second receiving unit 2b are tuned to different channels, and the storage unit 10 outputs the output signal output from the second signal converting unit 3b. x4, x5, and x6 are stored, and the first adaptive antenna processing unit 4a outputs the output signals x1, x2, and x3 output from the signal conversion unit 3a or the output signals x4, x5, and The first demodulator 5a demodulates the combined signal y1 output from the first adaptive antenna processor 4a based on either one of x6, and the audio signal sa1 and the VICS data sv are navigation devices. When the FM demodulated signal is output to 200 and the FM demodulated signal is output to the determining unit 7, the determining unit 7 receives the broadcast wave of the channel designated by the user based on the FM demodulated signal. Outputs the output signals x1, x2 and x3 output from the signal conversion unit 3a to the first adaptive antenna processing unit 4a, and when the broadcast wave of the channel designated by the user has not been received, the storage unit 10 The switches 11 to 13 are controlled so that the output signals x4, x5 and x6 stored in are input to the first adaptive antenna processing unit 4a.

  Therefore, for example, when entering a tunnel where FM broadcast is not retransmitted or entering a place surrounded by mountains, the user cannot listen to the broadcast of the specified channel at all. The user can listen to another channel's broadcast.

  In addition, the determination unit 7 determines whether the vehicle is traveling in a tunnel in which FM broadcast is not retransmitted based on the radio wave reception status and reception environment data in the first reception signal processing unit 1a. Accordingly, the switches 11 to 13 are controlled, so that the channel can be switched smoothly.

  In addition, since the FM tuner can be configured by using one adaptive antenna processing unit and demodulating unit, the manufacturing cost can be reduced as compared with the FM tuner 103 according to the fourth embodiment.

  In each of the embodiments described above, the present application is applied when receiving FM broadcasts. However, the present invention may be applied to a different communication method.

  In each of the above-described embodiments, CMA is applied as an algorithm for removing the influence of interference waves. However, an algorithm different from this may be used. For example, in the case of digital communication, the respective disadvantages can be compensated by using CMA suitable for mobile communication and the maximum ratio combining method capable of improving the SN ratio. In this case, for example, CMA is used for the channel closer to the broadcasting station, and the maximum ratio combining method is used for the channel very far from the broadcasting station. On the other hand, it is possible to increase the weak reception sensitivity.

  An algorithm that removes the influence of interference waves by controlling only one of the amplitude and phase may be used.

  Further, in each of the above embodiments, the FM tuner is configured by two received signal processing units, but may be configured by three or more received signal processing units.

  In each of the above embodiments, the FM tuner described above controls the reception operation and the reception operation. The FM tuner includes a computer and a recording medium, and the recording medium includes the reception operation described above. A program (an example of a reception processing program) for controlling the reception operation may be stored, and the same operation as described above may be performed by reading the program with this computer.

  In this case, the recording medium may be a recording medium such as a DVD or a CD, and the FM tuner may be provided with a reading device that reads a program from the recording medium.

  The present invention is not limited to the above embodiment. The above embodiment is merely an example, and has substantially the same configuration as the technical idea described in the claims of the present invention, and has the same function and effect as anything. It is included in the technical scope of the present invention.

1 is a block diagram illustrating an example of a schematic configuration of an FM tuner 100 according to a first embodiment. It is a block diagram which shows an example of schematic structure of the 1st adaptive antenna process part 4a which concerns on 1st Embodiment. It is a block diagram which shows an example of schematic structure of the 1st demodulation part 5a which concerns on 1st Embodiment. It is a flowchart which shows an example of the flow of the channel setting process of FM tuner 100 which concerns on 1st Embodiment. It is a flowchart which shows an example of the process flow in the same channel reception process of FM tuner 100 which concerns on 1st Embodiment. It is a flowchart which shows an example of the flow of a process in the non-same channel reception process of FM tuner 100 concerning 1st Embodiment. It is a block diagram which shows an example of schematic structure of the FM tuner 101 which concerns on 2nd Embodiment. It is a flowchart which shows an example of the flow of a process in the non-same channel reception process of FM tuner 101 which concerns on 2nd Embodiment. It is a block diagram which shows an example of schematic structure of the navigation apparatus 200 which concerns on 3rd Embodiment. It is a block diagram which shows an example of schematic structure of the FM tuner 102 which concerns on 3rd Embodiment. It is a block diagram which shows an example of schematic structure of the 2nd demodulation part 5b which concerns on 3rd Embodiment. It is a flowchart which shows an example of the flow of a process in the same channel reception process of FM tuner 102 which concerns on 3rd Embodiment. It is a flowchart which shows an example of the flow of a process in the non-same channel reception process of FM tuner 102 which concerns on 3rd Embodiment. It is a block diagram which shows an example of schematic structure of the FM tuner 103 which concerns on 4th Embodiment. It is a flowchart which shows an example of the flow of a process in the non-co-channel reception process of FM tuner 103 concerning 4th Embodiment. It is a block diagram which shows an example of schematic structure of the FM tuner 104 which concerns on 5th Embodiment. It is a flowchart which shows an example of the process flow in the non-co-channel reception process of FM tuner 104 which concerns on 5th Embodiment.

Explanation of symbols

AT1, AT2, AT3 Antenna 1a First received signal processing section 1b Second received signal processing section 2a First receiving section 2b Second receiving section 21, 22, 23, 24, 25, 26 RF / IF processing section 3a First signal Conversion unit 3b Second signal conversion unit 311, 312, 313, 314, 315, 316 A / D conversion unit 321, 322, 323, 324, 325, 326 Digital mixer 331, 332, 333, 334, 335, 336 Filter unit 4a First adaptive antenna processing unit 4b Second adaptive antenna processing unit 41, 42, 43 Multiplier 44 Adder 45 Weight control unit 5a First demodulator 5b Second demodulator 51 Arc tangent FM demodulator 52 Stereo demultiplexer 53 Memory 54 VICS decoder 6, 11, 12, 13 switch 7 determination unit 8 operation unit 9 Control unit 10 Storage unit 100, 101, 102, 103, 104 FM tuner 200 Navigation device 201 GPS reception unit 202 Sensor unit 203 Interface unit 204 HD drive 205 DVD drive 206 Audio processing unit 207 Speaker 208 Operation unit 209 Display unit 210 Buffer memory 211 Display control unit 212 System control unit 213 RAM / ROM
214 System bus

Claims (12)

In a receiving apparatus that variably controls the directivity of a plurality of antenna elements and outputs a received signal,
A plurality of reception signal generating means for generating each of the reception signals;
Signal selecting means for selecting one of the plurality of received signals based on the signal quality of each of the plurality of received signals generated by the plurality of received signal generating means;
Signal output means for outputting the selected received signal,
Each of the received signal generating means
Tuning means for outputting a tuning signal tuned to a channel to receive the antenna signal output from each of the antenna elements, and a different channel from the tuning means included in the other received signal generating means can be set. Tuning means;
The influence of the interference wave received by each antenna element is removed from the received signal by generating the received signal based on each tuned signal while controlling the amplitude and phase of each output tuned signal. Interference wave influence removing means,
The interference wave effect removing means included in the plurality of received signal generating means uses the same algorithm and tunes the amplitude and phase when tuning to the same channel between the received signal generating means. When the parameter for determining the amount of fluctuation of the weighting coefficient used for the control of the above is set to a value different from each other to remove the influence of the interference wave and tuned to a different channel between the reception signal generating means, A receiving apparatus that removes the influence of the interference wave using different algorithms. The receiving device according to claim 1,
At least one of the algorithms used for removing the influence of the interference wave is CMA (Constant Modulus Algorithm). The receiving device according to claim 2,
At least one of the algorithms used for removing the influence of the interference wave is an algorithm different from the CMA. The receiving apparatus according to any one of claims 1 to 3,
It further comprises speed information receiving means for receiving speed information indicating the moving speed of the moving body from a navigation device that performs route guidance of the moving body on which the receiving apparatus is mounted,
Each said interference wave influence removal means sets each said parameter based on the said received speed information, The receiver characterized by the above-mentioned. The receiving device according to claim 4,
Each of the reception signal generation means further includes amplification means capable of amplifying each of the antenna signals and variably controlling a gain for each of the antenna signals.
The receiving apparatus further comprising time constant setting means for setting a time constant of a gain in each of the amplifying means based on the received speed information. The receiving apparatus according to any one of claims 1 to 3,
The one received signal generating means further comprises storage means for storing the received signal generated by the interference wave effect removing means,
When tuning to different channels between the reception signal generation means, the signal selection means is configured to receive radio waves of channels to be received by other reception signal generation means other than the one reception signal generation means. In response, the receiving apparatus selects one of the received signal generated by the other received signal generating means and the received signal stored by the storage means. The receiving device according to claim 6,
Environment information receiving means for receiving environment information indicating the reception environment of radio waves at the current position of the mobile body from a navigation device that performs route guidance of the mobile body on which the receiver is mounted,
The signal selection unit selects either the reception signal generated by the other reception signal generation unit or the reception signal stored by the storage unit according to the received environment information. And a receiving device. The receiving device according to claim 6 or 7,
The receiving device characterized in that the tuning means of the other received signal generating means outputs the tuning signal tuned to a channel set by a user via an input means. The receiving apparatus according to any one of claims 1 to 3,
Each of the tuning means can set a channel in which sound information is carried,
Each received signal generating means further comprises a demodulating means for demodulating the received signal generated by the interference wave effect removing means into the sound information,
The signal selecting means selects the sound information having the best signal quality among the plurality of sound information demodulated by the demodulating means included in the plurality of received signal generating means. The receiving device according to claim 9, wherein
The demodulating means included in one received signal generating means demodulates the received signal generated by the interference wave influence removing means into the sound signal and traffic information used for route guidance by a navigation device,
When tuning to different channels between the reception signal generation means, the tuning means included in the reception means other than the one reception signal generation means are set by the user via the input means. The tuning signal tuned to a channel is output, and the tuning means included in the one reception signal generating means outputs the tuning signal tuned to a channel in which the traffic information is carried together with the sound information, and The signal output means outputs the sound information selected by the signal selection means and the demodulated traffic information simultaneously to the navigation device. In the receiving device according to claim 9 or 10,
Each of the tuning means can set a channel in which the sound signal is modulated by FM (Frequency Modulation) stereo method,
Each of the demodulating means extracts a pilot signal from the received signal generated by the interference wave influence removing means, and self-modulates according to the phase difference between the pilot signal and the pilot signal extracted by the other demodulating means. The receiving apparatus is characterized in that the phase of the sound signal demodulated by and the sound signal demodulated by the other demodulation means is matched. A computer included in a receiving apparatus that variably controls the directivity of a plurality of antenna elements and outputs a received signal,
A plurality of reception signal generating means for generating each of the reception signals;
Signal selecting means for selecting one of the plurality of received signals based on the signal quality of each of the plurality of received signals generated by the plurality of received signal generating means;
Function as signal output means for outputting the selected received signal,
The computer as each of the received signal generating means,
Tuning means for outputting a tuning signal tuned to a channel to receive the antenna signal output from each of the antenna elements, and a different channel from the tuning means included in the other received signal generating means can be set. Tuning means,
The influence of the interference wave received by each antenna element is removed from the received signal by generating the received signal based on each tuned signal while controlling the amplitude and phase of each output tuned signal. Function as a means for removing interference effects,
The interference wave effect removing means included in the plurality of received signal generating means uses the same algorithm and tunes the amplitude and phase when tuning to the same channel between the received signal generating means. When the parameter for determining the amount of fluctuation of the weighting coefficient used for the control of the above is set to a value different from each other to remove the influence of the interference wave and tuned to a different channel between the reception signal generating means, A reception processing program for removing the influence of the interference wave by using different algorithms.

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