Channel equalization with SCDMA modulation
View Patent ↗The present invention relates a system and method for mitigating impairment in a communication system. In one embodiment, the system includes a transmitter adapted to transmit at least one signal and a receiver adapted to receive the at least one signal and mitigate inter code interference in the signal using at least one inter code interference coefficient.
1. A communication system for receiving at least two signals, comprising:
a receiver adapted to receive the signals and mitigate interference due to a lack of orthogonality in spreading codes that spread said signals using at least one intercode interference coefficient, wherein said receiver further comprises an equalizer adapted to receive at least one matched filter output and output an ICI-reduced symbol soft decision, and where said equalizer is further adapted to post multiply said at least one matched filter output by a vector EQ.
2. The system of claim 1 , wherein said receiver further comprises a demodulator adapted to demodulate the signals.
3. The system of claim 1 , wherein said receiver further comprises at least one matched filter adapted to output said at least one matched filter output.
4. The system of claim 1 , wherein said receiver further comprises a serializer adapted to receive at least one matched filter output and sequence said at least one filter output.
5. The system of claim 1 , wherein said adaptive equalizer is adapted to output at least one ICI-eliminating coefficient.
6. The system of claim 1 , wherein the interference due to a lack of orthogonality in spreading codes that spread said signals occurs due to the delay of one of the signal with respect to others of the signals.
7. The system of claim 1 , wherein said transmitter is adapted to pre-equalize the signals.
8. The system of claim 7 , wherein said transmitter is further adapted to create an EQt matrix used to pre-equalize the signals.