In-Phase and Quadrature Imbalance Compensation by Using Direct Conversion Transmitters

While transmitting the data over communication channel, various problems such as communication error and mismatch arises. For reducing those errors, frequency selective I/Q imbalance using Direct Conversion transmitters can be implemented. I/Q imbalance compensation procedure has been derived and incoherent measurements are required for avoiding the need for time, frequency and phase synchronization between the transmitter and the RF measurement unit. By using I/Q imbalance the Bit Error Rate and Throughput value will be improved because of that Efficiency will be low and long data transmission will be occurred. To overcome this I/Q imbalance, signal injection method will be used. In signal injection extra default signal is added in that phase and gain will be compared because of that the mismatch occurred here will be reduced.This architecture presents a good balance between different design aspects and enables to minimize the sampling frequency of the Digital-to-Analog (DAC) and Analog-to-Digital (ADC) Converters.