发明名称 |
TRANSMISSION OF DIGITAL SIGNALS BY ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING |
摘要 |
<p>In an orthogonal frequency division multiplexing (OFDM) system (10) which uses an outer Reed-Solomon encoder and interleaver (24) and an inner convolutional encoder (26), after the inner convolutional encoding the data bits are interleaved by an inner interleaver (28), and then grouped into symbols, each symbol having "m" bits. After grouping, the symbols are mapped to a complex plane using quadrature amplitude modulation (QAM). Thus, bits, not symbols, are interleaved by the inner interleaver (28). A receiver (12) performs a soft decision regarding the value of each bit in each complex QAM symbol received.</p> |
申请公布号 |
CA2263669(A1) |
申请公布日期 |
1998.12.23 |
申请号 |
CA19982263669 |
申请日期 |
1998.06.16 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
VIJAYAN, RAJIV;WOLF, JACK K.;LEE, CHONG U.;ZEHAVI, EPHRAIM;ODENWALDER, JOSEPH P. |
分类号 |
H04J11/00;H03M13/15;H03M13/25;H03M13/27;H03M13/29;H03M13/31;H03M13/45;H04L1/00;H04L27/26;H04N7/24;(IPC1-7):H04J1/02;H04J1/00 |
主分类号 |
H04J11/00 |
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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