发明授权
- 专利标题: Multi-channel spread spectrum system
- 专利标题(中): 多通道扩频系统
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申请号: US09970888申请日: 2001-10-05
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公开(公告)号: US06993065B2公开(公告)日: 2006-01-31
- 发明人: Don Li , Gang Yang
- 申请人: Don Li , Gang Yang
- 申请人地址: US NJ West Long Branch
- 专利权人: Golden Bridge Technology Inc.
- 当前专利权人: Golden Bridge Technology Inc.
- 当前专利权人地址: US NJ West Long Branch
- 代理机构: McDermott Will & Emery LLP
- 主分类号: H04B1/707
- IPC分类号: H04B1/707
摘要:
A multi-channel spread-spectrum system separates a data stream, for example from a convolutional encoder and an interleaver, into sub-channel data-sequence signals. For each sub-channel data-sequence signal, m bits are translated to one code of a unique set of orthogonal chip-sequence signals. The other k bits of the same sub-channel data-sequence signal are translated to a distinct phasor. Each phasor is used to modulate the respective chip-sequence signal. A complex-signal combiner combines the real and imaginary components of all the phase-modulated chip-sequence signals into in-phase (I) and quadrature (Q) spread-spectrum multi-channel signals, which are spread by a cell-site specific signature-sequence. The receiver decorrelates the received spread-spectrum signal, preferably with a bank of matched filter (MF) joint-detectors, to recover the bits from all the spread-spectrum sub-channel signals for remultiplexing into the transmitted data stream. The multi-channel spread-spectrum system supports constant data rate throughout the cell by maintaining a large processing gain, at the demultiplexed sub-channel data sequence level, thus a code-reuse-one type spread-spectrum system can be deployed with the aid of power control.
公开/授权文献
- US20020015437A1 Multi-channel spread spectrum system 公开/授权日:2002-02-07