Frequency domain joint detection for wireless communication systems

A receiver configured to perform joint detection of data symbols in a frequency domain, the receiver comprising:

• a serial-to-parallel (S/P) converter for converting received data into parallel data;
• a fast Fourier transform processor for performing a fast Fourier transform on the parallel data to convert the parallel data to frequency domain data;
• and
• a frequency domain joint detector for performing frequency domain joint detection on the frequency domain data to obtain the data symbols of users jointly in a frequency domain, wherein users are assigned a plurality of subcarriers and a spreading code with a spreading factor equal to the number of subcarriers so that user data is spread with the spreading code and mapped to the subcarriers, and the frequency domain joint detection is performed on the subcarriers.

An integrated circuit (IC) configured to perform joint detection of data symbols in a frequency domain, the IC comprising:

• a serial-to-parallel (S/P) converter for converting received data into parallel data;
• a fast Fourier transform processor for performing a fast Fourier transform on the parallel data to convert the parallel data to frequency domain data;
• and
• a frequency domain joint detector for performing frequency domain joint detection on the frequency domain data to obtain the data symbols of users jointly in a frequency domain, wherein users are assigned a spreading code with a spreading factor equal to a preconfigured number of subcarriers so that user data is spread with the spreading code and mapped to the subcarriers, and the frequency domain joint detection is performed on the subcarriers.