发明授权
- 专利标题: Method to inject hierarchical data onto single carrier stream
- 专利标题(中): 将分层数据注入单载波流的方法
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申请号: US10946678申请日: 2004-09-22
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公开(公告)号: US07280613B2公开(公告)日: 2007-10-09
- 发明人: Glenn A. Walker , Eric A. Dibiaso , Michael L. Hiatt, Jr.
- 申请人: Glenn A. Walker , Eric A. Dibiaso , Michael L. Hiatt, Jr.
- 申请人地址: US MI Troy
- 专利权人: Delphi Technologies, Inc.
- 当前专利权人: Delphi Technologies, Inc.
- 当前专利权人地址: US MI Troy
- 代理商 Jimmy L. Funke
- 主分类号: H04L27/20
- IPC分类号: H04L27/20
摘要:
The present invention involves a transmitter for transmitting two levels of data in a hierarchical transmission system. The transmitter has encoders, a modulator, an adjuster, and an up converter. The first encoder has a first output and capable of providing digital information based on a first level of data on the first output. The second encoder has a second output and is capable of providing digital information based on a second level of data on the second output. The modulator is coupled to the first encoder and has I and Q outputs. The adjuster is coupled to the modulator and second encoder and modifies signals on the I and Q outputs of the modulator to produce transmission I and transmission Q outputs. The up converter is coupled to the adjuster and is capable of transmitting broadcast radio signals based on the transmission I and transmission Q outputs. The modulator may include a root raised cosine filter and/or a QPSK modulator. The I and Q outputs of the modulator include analog I and analog Q signals. The adjuster includes an inverter, a phase rotator circuit, a combiner, and/or a limiter. The transmission I and transmission Q outputs of the adjuster include analog I and analog Q signals.