Low power current-cut switched-current matched filter for CDMA

被引:0
作者
Togura, K [1 ]
Nakase, H [1 ]
Kubota, K [1 ]
Masu, K [1 ]
Tsubouchi, K [1 ]
机构
[1] Tohoku Univ, Elect Commun Res Inst, Sendai, Miyagi 9808577, Japan
关键词
switched-current (SI) circuit; matched filter; code-division multiple-access (CDMA); current-cut;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We have proposed a current-cut switched-current matched filter (CC-SIMF) for direct-sequence code division multiple-access (DS-CDMA). The 256-chip CC-SIMF can achieve low power consumption of less than 10 mW under high-speed operation of more than 16 Mcps. To reduce the current transfer error accumulation, we propose a parallel SIMF configuration. A 128-chip SIMF using 0.8-mum Complementary Metal Oxide Semiconductor (CMOS) process has been designed and fabricated. Optimization of the current memory cell structure has been described. The correlation operation at 16 Mcps has been obtained using a 128-chip orthogonal m-sequence. The code phase separation performance for path diversity has been clearly observed. The power consumption has been significantly reduced using the current-cut method.
引用
收藏
页码:212 / 219
页数:8
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