Invention Grant
- Patent Title: Polarization mode dispersion compensation in multilevel coded-modulation schemes using blast algorithm and iterative polarization cancellation
- Patent Title (中): 使用爆炸算法和迭代偏振消除的多级编码调制方案中的偏振模色散补偿
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Application No.: US12392294Application Date: 2009-02-25
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Publication No.: US08385439B2Publication Date: 2013-02-26
- Inventor: Ivan B. Djordjevic , Lei Xu , Ting Wang
- Applicant: Ivan B. Djordjevic , Lei Xu , Ting Wang
- Applicant Address: US NJ Princeton
- Assignee: NEC Laboratories America, Inc.
- Current Assignee: NEC Laboratories America, Inc.
- Current Assignee Address: US NJ Princeton
- Agent Joseph Kolodka; James Bitetto
- Main IPC: H04K1/10
- IPC: H04K1/10 ; H04K3/00 ; H04B10/06

Abstract:
Receivers and methods are provided for polarization mode dispersion compensation in multi-level coded-modulation schemes using a BLAST algorithm and iterative polarization cancellation. A receiver includes a vertical Bell Laboratories Layered Space-Time Architecture (V-BLAST) orthogonal frequency division multiplexing (OFDM) detector configured to receive input sequences and partially cancel polarization interference with respect to the input sequences to output symbol estimates for the input sequences. The receiver further includes one or more low-density parity-check (LDPC) decoders coupled to the V-BLAST OFDM detector configured to receive channel bit reliabilities and output code words. The channel bit reliabilities are indirectly calculated from the symbol estimates. The one or more LDPC decoders iteratively provide extrinsic soft information feedback to the V-BLAST OFDM detector to compensate for the polarization interference.
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