| Summary: | 碩士 === 國立交通大學 === 電子工程系 === 89 === The improved understanding of the theoretical basis of multiuser detection and advances in digital,mixed-signal,and RF technologies let the realization of advanced DS-CDMA receive based on multiuser detection principles become a eality.Due to the lowe complexity, subtractive interference cancellation approaches are attractive for practical implementation
of multiuser detection.In this thesis,we implement a 3GPP DS-CDMA receive based on parallel interference cancellation (PIC)together with a corresponding wireless channel simulator.A desktop PC acts as the controller,and a DSP-embedded card is employed to implement the wireless channel simulato and the PIC eceiver.In wireless channel simulation,we simulate the e ffect of multipath Rayleigh fading on the transmitted signal at
baseband.The implementation of the PIC eceive employs some techniques to reduce the complexity.For e fficiency and ease of programming,multithreading is adopted in the controller.When there are 5 users,a single path for each user,and a single antenna in the system,the processing speed of the channel simulator is 4.1M chips per second and that of the PIC receive at the initial stage is also 4.1M chips per second.
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