发明名称 |
Apparatus and method for improving signal-to-noise ratio in a multi-carrier CDMA communication system |
摘要 |
For use in a multi-carrier CDMA receiver, a noise reduction circuit for improving a signal-to-noise ratio of a multi-carrier signal corresponding to a predetermined sequence of chips. Each chip has a value of Logic 0 or Logic 1. The noise reduction circuit comprises a Fast Fourier Transform (FFT) circuit for receiving the multi-carrier signal and generating frequency-domain component signals. A sampling circuit generates a first sequence of samples of the frequency-domain component signals. A controller identifies samples in the first sample sequence corresponding to Logic 0 chips and identifies samples in the first sample sequence corresponding to Logic 1 chips. A randomizing circuit generates a second sample sequence by shifting positions within the first sample sequence of some of the identified samples corresponding to Logic 0 chips, or by shifting positions within the first sample sequence of some of the identified samples corresponding to Logic 1 chips.
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申请公布号 |
US2005265274(A1) |
申请公布日期 |
2005.12.01 |
申请号 |
US20040841256 |
申请日期 |
2004.05.07 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
CLEVELAND JOSEPH R. |
分类号 |
H04B7/216;H04B17/02;H04J11/00;H04L5/02;H04L27/26;(IPC1-7):H04B7/216 |
主分类号 |
H04B7/216 |
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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