IQ to phase conversion method and apparatus

An apparatus for IQ to phase conversion comprising:

• an absolute value module connected to receive a first digital signal indicative of a first input value and a second digital signal indicative of a second input value, and configured to provide a first absolute value signal indicative of a first absolute value which is an absolute value of the first input value, and a second absolute value signal indicative of a second absolute value which is an absolute value of the second input value;
• a first conversion module connected to the absolute value module, and configured to provide a first logarithmic signal using the first absolute value signal, wherein the first logarithmic signal is indicative of a first logarithmic value which is a scaled logarithmic value of the first absolute value;
• a second conversion module connected to the absolute value module, and configured to provide a second logarithmic signal using the second absolute value signal, wherein the second logarithmic signal is indicative of a second logarithmic value which is a scaled logarithmic value of the second absolute value;
• a subtractor module configured to provide a subtract value signal using the first logarithmic signal and the second logarithmic signal, wherein the subtractor module provides the subtract value signal by subtracting the first logarithmic value from the second logarithmic value, and the subtract value signal is indicative of a difference value from the subtracting of the subtractor module;
• a storage unit configured to, in response to the subtract value signal, provide a phase signal indicative of a phase value corresponding to the first input value and the second input value, wherein the storage unit stores multiple phase values each is corresponding to a respective index value, and wherein the phase signal is provided by selecting in the storage unit the phase value using a subtract value indicated by the subtract value signal as the index value.