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동기화 및 수신기 설계
반송 주파수 및 위상 복원, 주파수 및 위상 복원 타이밍, AGC, I/Q 불균형 보상 및 위상 고정 루프
AGC, I/Q 불균형 수정, DC 차단, 타이밍 및 반송파 동기화 등 프론트엔드 수신기 및 동기화 구성요소를 모델링하고 시뮬레이션합니다.
함수
iqcoef2imbal | Convert compensator coefficient to amplitude and phase imbalance |
iqimbal2coef | Convert I/Q imbalance to compensator coefficient |
channelDelay | Channel timing delay (R2020a 이후) |
ofdmChannelResponse | Calculate OFDM channel response (R2023a 이후) |
객체
comm.AGC | Adaptively adjust gain for constant signal level output |
comm.CarrierSynchronizer | Compensate for carrier frequency offset |
comm.SymbolSynchronizer | Correct symbol timing clock skew |
comm.PreambleDetector | Detect preamble in data |
comm.CoarseFrequencyCompensator | Compensate for frequency offset of PAM, PSK, or QAM signal |
comm.IQImbalanceCompensator | Compensate for IQ imbalance |
comm.DiscreteTimeVCO | Generate variable frequency sinusoid |
comm.GMSKTimingSynchronizer | Recover symbol timing phase using fourth-order nonlinearity method |
comm.MSKTimingSynchronizer | Recover symbol timing phase using fourth-order nonlinearity method |
블록
AGC | Adaptively adjust gain for constant signal-level output |
Carrier Synchronizer | Compensate for carrier frequency offset |
Symbol Synchronizer | Correct symbol timing clock skew |
Preamble Detector | Detect preamble in data packet |
Coarse Frequency Compensator | Compensate for carrier frequency offset in PAM, PSK, or QAM |
I/Q Compensator Coefficient to Imbalance | Convert compensator coefficient into amplitude and phase imbalance |
I/Q Imbalance Compensator | Compensate for imbalance between in-phase and quadrature components |
I/Q Imbalance to Compensator Coefficient | Converts amplitude and phase imbalance into I/Q compensator coefficient |
MSK-Type Signal Timing Recovery | Recover symbol timing phase using fourth-order nonlinearity method |
OFDM Channel Response | Calculate OFDM channel response (R2023a 이후) |
도움말 항목
MATLAB
- Correct Phase and Frequency Offset for 16-QAM Using Coarse and Fine Synchronization
Compensation of significant phase and frequency offsets for a 16-QAM signal in an AWGN channel is accomplished in two steps. - Compensate for Frequency Offset Using Coarse and Fine Compensation
Correct for a phase and frequency offset in a noisy QAM signal using a carrier synchronizer. - Correct Symbol Timing and Doppler Offsets
Correct symbol timing and frequency offset errors by using thecomm.SymbolSynchronizer
andcomm.CarrierSynchronizer
System objects. - Adjust Carrier Synchronizer Damping Factor to Correct Frequency Offset
Attempt to correct for a frequency offset using the carrier synchronizer object. - MSK Signal Recovery
Model channel impairments such as timing phase offset, carrier frequency offset, and carrier phase offset for a minimum shift keying (MSK) signal.
Simulink
- MSK Signal Recovery
This model shows how channel impairments such as timing phase offset, carrier frequency offset, and phase offset for a minimum shift keying (MSK) signal are modeled.