Unsupervised adaptive chip separation filter for CDMA terminal

A receiver for use in a CDMA telecommunications system, comprising:

• at least one antenna for receiving signals from a CDMA channel, said signals comprising a desired user signal;
• combining circuitry, coupled to said antenna, for performing chip waveform filtering and maximal ratio combining over multipath components and antenna elements to produce mutually correlated chip estimates of said received signals;
• an adaptive separator, coupled to said combining circuitry, for adaptively separating said mutually correlated chip estimates;
• and
• a correlator, coupled to said adaptive separator, for despreading an output of said adaptive separator to obtain an estimate for data symbols of said desired user signal, wherein said despreader further comprises circuitry for multiplying said output of said adaptive separator with a conjugated long scrambling code and a Walsh code, and then to integrate the result over a symbol period.

A method for receiving signals in a CDMA telecommunications system, said method comprising:

• receiving signals from a CDMA channel, said signals comprising a desired user signal;
• performing chip waveform filtering and maximal ratio combining over multipath components and antenna elements to produce mutually correlated chip estimates of said received signals;
• adaptively separating said mutually correlated chip estimates;
• and
• despreading said separated chip estimates to obtain an estimate for data symbols of said desired user signal.

A method for receiving signals in a CDMA telecommunications system, said method comprising:

• receiving signals from a CDMA channel, said signals comprising a desired user signal;
• performing chip waveform filtering and maximal ratio combining over multipath components and antenna elements to produce mutually correlated chip estimates of said received signals;
• adaptively separating said mutually correlated chip estimates;
• and
• despreading said separated chip estimates to obtain an estimate for data symbols of said desired user signal, wherein despreading further comprises multiplying said adaptively separated chip estimates with a conjugated long scrambling code and a Walsh code, and then integrating the result over a symbol period.

A receiver for receiving a spread spectrum signal from a multipath channel, comprising:

• input circuitry, for coupling to N receive antennas, for generating mutually correlated chip estimates;
• a separator filter, coupled to an output of said input circuitry, for adaptively separating said mutually correlated chip estimates;
• and
• a despreader, coupled to an output of said separator filter, for generating desired user symbol estimates from the adaptively separated chip estimates.