发明名称 |
Multi-user code division multiple access receiver |
摘要 |
A receiver and method for receiving a code-division multiple-access (CDMA) signal combining symbol values spread by a plurality of spreading codes, which method comprises the steps of:(a) converting the CDMA signal to a baseband signal;(b) recognizing symbol boundaries in every multipath for every user in the baseband signal to produce a delay estimate;(c) estimating an attenuation and phase rotation impressed on the signal by each multipath to produce channel estimates;(d) generating new symbol estimates for every user at a sampling rate that is greater than a symbol rate of the signal;(e) generating an estimate of the received signal using said symbol estimates and channel estimates;(f) comparing the received signal with its estimate and feeding estimation error back to a means for estimating the transmitted symbols;(g) sampling the symbol estimates at the estimated symbol boundaries of each user to obtain final symbol estimates; and(h) repeating steps (b) through (g) with every new sample.
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申请公布号 |
US6240099(B1) |
申请公布日期 |
2001.05.29 |
申请号 |
US19980039739 |
申请日期 |
1998.03.16 |
申请人 |
NATIONAL UNIVERSITY OF SINGAPORE;OKI TECHNO CENTRE (SINGAPORE) PTE. LTD. |
发明人 |
LIM TENG JOON;RASMUSSEN LARS;SUGIMOTO HIROKI |
分类号 |
H04J13/02;H04B1/707;(IPC1-7):H04B7/216 |
主分类号 |
H04J13/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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