Adaptive Parallel interference cancellation for CDMA Systems- A weight selection and filtering scheme
Publish Year: 1390
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
ICEEE03_032
تاریخ نمایه سازی: 18 مهر 1390
Abstract:
Parallel interference cancellation (PIC) is a well-known multiuser detection algorithm in direct-sequence code-division multiple-access architecture. One problem associated with the PIC is that unreliable interference cancellation may occur in the early stages and the system performance may be degraded. Thus, the partial PIC detector was developed to control the cancellation level by use of interference cancellation factors. Partial PIC can be implemented with an adaptive form, in which optimal weights are derived using the least mean square (LMS) algorithm. In this paper, we propose an algorithm improving the conventional adaptive partial PIC. The main idea is to reduce the number of active weights in the LMS algorithm, and to perform weight post-filtering such that the resultant excess mean square error can be reduced. We also analyze the performance of the proposed algorithm outperforms the conventional partial PIC, and derived analytical results are accurate.
Authors
Amin Aliabadi
Msc in The Telecommunication
Ali Alavian
Phd in The Telecommunication
Reza Dianat
Phd in The Telecommunication
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