误码率程序出错解决方法

将发送和接收程序中的sink和source分别改为：

            self._sink = uhd_transmitter(options.args, symbol_rate,                                        options.samples_per_symbol, options.tx_freq,                                        options.lo_offset, options.tx_gain,                                        options.spec, options.antenna,                                        options.clock_source, options.verbose)

和

            self._source = uhd_receiver(options.args, symbol_rate,                                       options.samples_per_symbol, options.rx_freq,                                        options.lo_offset, options.rx_gain,                                       options.spec, options.antenna,                                       options.clock_source, options.verbose)