dds_mixer operates in 3 modes:
Mixer Mode 0:
This is dds mode only. The library element has a single output window, which is written to with the sin/cos components corresponding to the programmed phase increment.
Mixer Mode 1:
This is dds plus mixer for a single data input port.
Each data input sample is complex multiplied with the corresponding dds sample, to create a modulated signal that is written to the output window.
Mixer Mode 2:
This is a special configuration for symmetrical carriers and two data input ports.
Each data sample of the first input is complex multiplied with the corresponding dds sample to create a modulated signal.
These are the templates to configure the dds_mixer class.
Parameters:
| TT_DATA | describes the type of individual data samples input to and output from the dds_mixer function. This is a typename and must be one of the following: cint16, cint32, cfloat. Note that for cint32, the internal DDS still works to int16 precision, so Mixer Mode 0 will be cast, though for Modes 1 and 2, data to be mixed will be cint32. |
| TP_INPUT_WINDOW_VSIZE | describes the number of samples in the input/output buffer API or number of samples to process per iteration. |
| TP_MIXER_MODE | describes the mode of operation of the dds_mixer . The values supported are: 0 (dds only mode), 1 (dds plus single data channel mixer), 2 (dds plus two data channel mixer for symmetrical carriers) |
| TP_API | specifies if the input/output interface should be buffer-based or stream-based. The values supported are 0 (buffer API) or 1 (stream API). |
| TP_SSR | specifies the super sample rate, ie how much data input/output in parallel for a single channel. There will be a TP_SSR number of kernels, with a TP_SSR number of each port used on the interface. A default value of 1 corresponds to the typical single kernel case. |
template < typename TT_DATA, unsigned int TP_INPUT_WINDOW_VSIZE, unsigned int TP_MIXER_MODE, unsigned int TP_API = IO_API::WINDOW, unsigned int TP_SSR = 1 > class dds_mixer_graph: public graph // typedefs typedef std::array <port <direction>, TP_SSR> portArray typedef dds_mixer <TT_DATA, KINPUT_WINDOW_VSIZE, TP_MIXER_MODE, TP_API, USE_INBUILT_SINCOS> kernelClass // fields portArray <input> in1 portArray <input> in2 portArray <output> out kernel m_ddsKernel[TP_SSR] static constexpr unsigned int KINPUT_WINDOW_VSIZE