T-spaced equalization for 1xEV systems

A method that facilitates mitigating of intersymbol interference, comprising:

• performing match filtering of a receiving signal to produce a match-filtered signal;
• down-sampling the match-filtered signal;
• applying the match-filtered signal to a plurality of of fingers of a RAKE receiver;
• and
• employing equalization in connection with a subset of fingers of the RAKE receiver, wherein the RAKE receiver employs at least one RAKE finger performing lower-order modulation and the subset of fingers performing high-order modulation.

A system that facilitates mitigating interchip interference, comprising:

• means for receiving a signal;
• means for processing the signal according to a RAKE receiver, wherein the RAKE receiver comprises a plurality of RAKE fingers having at least one RAKE finger for processing low-order, modulation channels and a subset of RAKE fingers for processing high-order modulation channels;
• and
• means for equalizing at a chip rate a subset of the received signal, the means for equalizing being applied in connection with the subset of RAKE fingers for processing high-order modulation channels.

A system that facilitates compensating for interchip interference, comprising:

• a matched filter that samples quadrature received signals at a clock frequency greater than a chip rate to produce a matched-filter signal, and calculates a correlation between the matched-filter signals at a replica of prescribed spread codes;
• an analog to digital converter that quantizes the matched-filter signal to produce a quantized signal;
• a timing recovery system that down-samples the quantized signal;
• a sampler that samples the matched-filter signal at a predetermined symbol rate;
• a RAKE receiver, connected to the output of the sampler, comprising a plurality of RAKE fingers, wherein the plurality of RAKE fingers comprises at least one RAKE finger handling channels employing low-order modulation and a subset of RAKE fingers handling channels employing high-order modulation;
• and
• a T-spaced equalizer associated with at least one finger of the subset of fingers of the RAKE receiver, the T-spaced equalizer operating at about the chip rate.

A wireless communication device for a wireless communication system, the wireless communication device comprising:

• a RAKE receiver;
• said RAKE receiver comprising a system that receives and down-samples a signal to produce a down-sampled signal;
• a plurality of RAKE fingers that despread the down-sampled signal respectively, the plurality of RAKE fingers comprise, at least one RAKE finger performing low-order modulation and a subset of the plurality of RAKE fingers performing high-order modulation;
• and
• said RAKE receiver further comprising an equalizer associated with each RAKE finger of the subset, said equalizer operating at a chip rate, and facilitating compensation for interchip interference.