Abstract—For the code division multiple access (CDMA)

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【资料名称】：Receivers With Chip-Level Decision Feedback Equalizer for CDMA Downlink Channels
【作者】：Jinho Choi,
【语言】：English
【页数】：15
【格式】：pdf
【发表时间】：2004
【摘要或目录】：Abstract—For the code division multiple access (CDMA)
downlink channel, we investigate the decision feedback equalizer
(DFE) at chip-level to effectively suppress multiple-access
interference (MAI) when the spreading sequences are orthogonal.
The structure of the receiver with the chip-level DFE has been
investigated and the minimum mean-square error solution has
been derived. Due to the inherent structure of the chip-level
DFE, some iterative techniques with hard and soft decisions
have been proposed. It is shown that the proposed receivers
with the chip-level DFE can provide satisfactory performance.
In comparison with the adaptive chip-level linear equalizer, the
number of users can be doubled by using adaptive chip-level DFE
at a bit-error rate of 10 3. Throughout the paper, we assume that
scrambled orthogonal codes are used for spreading sequences.
symbol to symbol. From this, adaptive algorithms can be readily
applied to find (or estimate) the optimal solution adaptively with
low computational burden.

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感谢LZ