基于systemview的2dpsk信號傳輸仿真(文件)
【正文】 P(1)P(0/1)+P(0)P(1/0)= 1/2erfc(√r) (31) 在大信噪比（r1）條件下，式（31）可近似表示為 Pe≈1/2√πr exp(r) (32)由式（31）確定。 發(fā)送絕對碼 0 0 1 0 1 1 0 1 1 1 發(fā)送相對碼 0 0 0 1 1 0 1 1 0 1 0（a）無錯：接收相對碼 0 0 1 1 0 1 1 0 1 0 絕對碼 0 1 0 1 1 0 1 1 1（b）錯 1：接收相對碼 0 0 1 0 0 1 1 0 1 0 絕對碼 0 1 1 0 1 0 1 1 1（c）錯 2 接收相對碼 0 0 1 0 1 1 1 0 1 0 絕對碼 0 1 1 1 0 0 1 1 1（d）錯 3 接收相對碼 0 0 1 0 1 0 0 0 1 0 絕對碼 0 1 1 1 1 0 1 0 1 圖31 碼反變換器對錯碼的影響根據(jù)圖31類推，若碼反變換器輸入相對信號碼序列中連續(xù)出現(xiàn)n個錯碼，則輸出絕對信號碼序列中也只有兩個錯碼。 表3：BER測試圖符參數(shù)設置表編號庫/名稱 參數(shù)6Adder:NonParametricInputs from t8p0 t4p0 Outputs to 9 Max Rate = 400e+3 Hz7Source: GaussNoisePwr Density = W/Hz System = 1 ohmMean = 0 v Max Rate = 400e+3 Hz8Operator: GainGain = 9 dB Gain Units = dB Power Max Rate = 400e+3 Hz19Operator: SamplerInterpolating Rate = 20e+3 Hz Aperture = 0 sec Aperture Jitter = 0 sec Max Rate = 20e+3 Hz20Sink: Final ValueInput from t22 Output Port 1 Max Input Rate = 4 Hz21Sink: Cndtnl StopAction = Go To Next Loop Memory = Retain all samplesThreshold = 1e+3 Input from t22 Output Port 222Comm: BER RateNo. Trials = 5e+3 bits Threshold = Offset = 1 bits Output 0 = BER t27 Output 1 = Cumulative Avg t20 Output 2 = Total Errors t21 Max Rate (Port 2) = 4 Hz23Operator: SmplDelayDelay = 1 samples Attribute = Passive Initial Condition = 0 v Fill Last Register Output 0 = Delay t22 t24 Output 1 = Delay dT Max Rate (Port 0) = 20e+3 Hz26Operator:ReSampleRate = 20e+3
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