Single user detection base station

A code division multiple access base station for use in receiving a plurality of data signals received over a shared spectrum, each received data signal experiencing a similar channel response, the base station comprising:

• an antenna for receiving a combined signal of the received data signals over the shared spectrum;
• a sampling device for sampling the combined signal at a multiple of a chip rate of the transmitted data signals;
• a channel estimation device for estimating a channel response for the combined signal at the multiple of the chip rate;
• and
• a single user detection device for determining a cross correlation matrix using the estimated channel response, for selecting a subblock of the cross correlation matrix, for determining a Cholesky factor for the subblock, for extending the Cholesky factor and for determining the spread data vector using the extended Cholesky factor, a version of the channel response and the samples;
• and
• wherein data of the data signals is estimated from the spread data vector.