发明名称 |
WIRELESS COMMUNICATIONS SYSTEM EMPLOYING OFDMA AND CDMA TECHNIQUES |
摘要 |
<p>Disclosed is an Orthogonal Frequency Division Multiple Access (OFDMA) based wireless communications system operable to communicate OFDMA type signals over a set of dynamically assigned orthogonal sub-carriers and Code Division Multiple Access (CDMA) type signals over a set of pre-allocated orthogonal sub-carriers. The OFDMA system utilizes pre-allocated orthogonal sub-carriers for CDMA type signal transmission in order to reduce the number of dynamic assignments of orthogonal sub-carriers in a typical OFDMA system. The OFDMA type signals may be signals processed in accordance with well-known OFDMA techniques, whereas the CDMA type signals may be signals processed in accordance with well-known CDMA and OFDMA techniques. The CDMA type signals may also be processed using a pre-coder incorporating a Discrete Fourier Transformer (DFT) matrix or Identity matrix to reduce the Peak-to-Average Power Ratio across the OFDMA system.</p> |
申请公布号 |
EP1972069(A1) |
申请公布日期 |
2008.09.24 |
申请号 |
EP20070709748 |
申请日期 |
2007.01.12 |
申请人 |
LUCENT TECHNOLOGIES INC. |
发明人 |
MONOGIOUDIS, PANTELIS;NAGARAJ, SHIRISH;VISWANATHAN, HARISH |
分类号 |
H04L27/26 |
主分类号 |
H04L27/26 |
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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