JP6974813B2 - レーダーシステムにおけるトランシーバ性能パラメータの測定 - Google Patents
レーダーシステムにおけるトランシーバ性能パラメータの測定 Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4008—Means for monitoring or calibrating of parts of a radar system of transmitters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
- G01S7/032—Constructional details for solid-state radar subsystems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/35—Details of non-pulse systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4004—Means for monitoring or calibrating of parts of a radar system
- G01S7/4021—Means for monitoring or calibrating of parts of a radar system of receivers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
- G01S7/4056—Means for monitoring or calibrating by simulation of echoes specially adapted to FMCW
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
- G01S7/406—Means for monitoring or calibrating by simulation of echoes using internally generated reference signals, e.g. via delay line, via RF or IF signal injection or via integrated reference reflector or transponder
- G01S7/4065—Means for monitoring or calibrating by simulation of echoes using internally generated reference signals, e.g. via delay line, via RF or IF signal injection or via integrated reference reflector or transponder involving a delay line
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
- G01S7/406—Means for monitoring or calibrating by simulation of echoes using internally generated reference signals, e.g. via delay line, via RF or IF signal injection or via integrated reference reflector or transponder
- G01S7/4069—Means for monitoring or calibrating by simulation of echoes using internally generated reference signals, e.g. via delay line, via RF or IF signal injection or via integrated reference reflector or transponder involving a RF signal injection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/0209—Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Radar Systems Or Details Thereof (AREA)
- Tests Of Electronic Circuits (AREA)
Description
Gaini=20logAi−Pi
ループバックパスが受信チャネルをまたがって対称的に設計される場合、利得は電力データを使用せずに、すなわち、下記のように計算され得る。
Gaini=20logAi
などの定数を、こうした目的で上記の式に付加し得、上式で、ADCFullScaleはADCのフルスケール電圧(1ボルトなど)であり、NumBitsは各ADC出力ワードにおけるビット数であり、Resistanceは例えば典型的な50オーム抵抗であり得る。無線設計者に知られている他の標準的な概念について標準化するために、他の同様の設計定数が存在し得る。
GainMismatchi,j=Gaini−Gainj
2つの受信チャネルi及びjの間の位相不一致は、下記のように計算され得る。
PhaseMismatchi,j=θi−θj
IFBandwidthについての典型的な値は、5MHz又は10MHzであり、正確なレーダー周波数プランニング、スキャンする最大ターゲット距離、FMCW周波数勾配などに依存する。Fsの値はIFBandwidthよりも高く選択されるべきである。
NoisePSDi=10×log10(NoisePoweri/IFBandwidth)
上式で、IFBandwidthは中間周波数(IF)の帯域幅である。最終的に、制御モジュール228は、対応するノイズPSDに基づいて各受信チャネルiについてノイズ指数(NF)を計算し(710)、ノイズ指数をセーフティプロセッサに報告する(712)。受信チャネルiについてのノイズ指数NFiは、下記のように計算し得る。
NFi=NoisePSDi−Gaini
PhaseMismatchi,j=θi−θj
2つの送信チャネルi及びjの間の電力不一致は、下記のように計算し得る。
PowerMismatchi,j=Pi−Pj
PowerMismatchi,j=Ai−Aj
この場合、測定されたADC出力振幅は、様々なPA出力での送信器電力不一致のみを表す。他の電力不一致式と比較して、この式は、電力測定値における如何なる誤差も電力検出器回路から除去する。
NoisePSDi = 10 × log10 (NoisePoweri / IFBandwidth)
上式で、IFBandwidthは中間周波数(IF)の帯域幅である。次いで、制御モジュール228は、対応するノイズPSDに基づいて各受信チャネルについてレーダーシステムノイズ指数(RSNF)を計算する(910)。受信チャネルiについてのレーダーシステムノイズ指数RSNFiは、下記のように計算し得る。
RSNFi=NoisePSDi−Gaini
NM1=M1_dB+0.5×M2_dB−0.5×M12_dB
NM2=M1_dB+M2_dB−M11_dB
他の非線形性メトリクスが、M1_dB、M2_dB、Mmn_dBの重み付け和、又はM1、M2、Mmnの積として同様に計算され得る。Mmnの値がM1及びM2の値よりも著しく低い場合、NMiの値は高いため、NMiの低い値は、受信チャネルにおいて相互変調積が高いことを示す。
NFi=NoisePSDi
RSNFi=NoisePSDi
Claims (6)
- 受信チャネル利得と受信チャネル間の利得不一致と受信チャネル間の位相不一致と受信チャネル雑音と受信チャネル線形性との少なくとも1つを含む1つ又は複数の性能パラメータを監視するために構成されるレーダーシステムオンチップ(SOC)であって、
2つ以上の受信チャネルと、
各々がプログラマブルシフタを含む2つ以上の送信チャネルと、
前記レーダーSOCがテストモードで動作されるときに連続波信号を生成するように動作可能な伝送生成回路要素であって、前記連続波信号を送信するように前記プログラマブルシフタに結合される、前記伝送生成回路要素と、
前記プログラマブルシフタによって生成されるテスト信号を受信するように前記プログラマブルシフタに結合されるコンバイナと、
前記コンバイナと前記2つ以上の受信チャネルの各々との間に結合されるスプリッタと、
を含み、
前記レーダーSOCが前記テスト信号を生成するために前記テストモードで動作するときに、前記プログラマブルシフタの各々が前記連続波信号に非ゼロの周波数を付加するように作動する、レーダーSOC。 - レーダーシステムオンチップ(SOC)であって、
2つ以上の受信チャネルと、
前記レーダーSOCがテストモードで動作されるときに信号を生成するように動作可能な伝送生成回路要素と、
2つ以上の送信チャネルであって、各送信チャネルが前記信号を受信するように前記伝送生成回路要素に結合されるプログラマブルシフタを含み、前記プログラマブルシフタがテスト信号を生成するように前記信号に非ゼロの周波数を付加するように動作可能である、前記2つ以上の送信チャネルと、
前記プログラマブルシフタから出力される前記テスト信号を受信するように前記プログラマブルシフタに結合されるコンバイナと、
前記コンバイナに結合される入力と、前記2つ以上の受信チャネルに結合される出力とを有するスプリッタと、
を含む、レーダーSOC。 - 請求項2に記載のレーダーSOCであって、
前記スプリッタが前記コンバイナから前記テスト信号を受信して前記テスト信号を前記2つ以上の受信チャネルに提供し、
前記2つ以上の受信チャネルの受信チャネルによって受信される前記テスト信号が、前記受信チャネルの利得と前記受信チャネルの位相とで構成されるグループから選択される少なくとも1つを計算するために用いられる、レーダーSOC。 - 請求項3に記載のレーダーSOCであって、
前記2つ以上の受信チャネルが少なくとも2つの受信チャネルを含み、各受信チャネルにおける前記受信したテスト信号が、受信チャネルのペア間の利得不一致と受信チャネルのペア間の位相不一致とで構成されるグループから選択される少なくとも1つを計算するために用いられる、レーダーSOC。 - 請求項2に記載のレーダーSOCであって、
前記2つ以上の受信チャネルの各受信チャネルからノイズデータ信号が収集され、各受信チャネルにおける前記ノイズデータ信号が、前記受信チャネルについてノイズ指数を計算するために用いられる、レーダーSOC。 - 請求項2に記載のレーダーSOCであって、
前記信号に基づく前記テスト信号が送信チャネルによって送信され、
前記2つ以上の受信チャネルの各受信チャネルによって受信される反射テスト信号が、前記受信チャネルと前記送信チャネルとの組み合わせについてレーダーシステムノイズ指数を計算するために用いられる、レーダーSOC。
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US14/870,129 US10234542B2 (en) | 2015-09-30 | 2015-09-30 | Measurement of transceiver performance parameters in a radar system |
PCT/US2016/054921 WO2017059317A1 (en) | 2015-09-30 | 2016-09-30 | Measurement of transceiver performance parameters in a radar system |
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